/* Subroutines for insn-output.c for ATMEL AVR micro controllers
- Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004
+ Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008
Free Software Foundation, Inc.
Contributed by Denis Chertykov (denisc@overta.ru)
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with GCC; see the file COPYING. If not, write to
- the Free Software Foundation, 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with GCC; see the file COPYING3. If not see
+ <http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "tm_p.h"
#include "target.h"
#include "target-def.h"
+#include "params.h"
+#include "df.h"
/* Maximal allowed offset for an address in the LD command */
#define MAX_LD_OFFSET(MODE) (64 - (signed)GET_MODE_SIZE (MODE))
static int avr_naked_function_p (tree);
static int interrupt_function_p (tree);
static int signal_function_p (tree);
+static int avr_OS_task_function_p (tree);
+static int avr_OS_main_function_p (tree);
static int avr_regs_to_save (HARD_REG_SET *);
+static int get_sequence_length (rtx insns);
static int sequent_regs_live (void);
static const char *ptrreg_to_str (int);
static const char *cond_string (enum rtx_code);
static int avr_num_arg_regs (enum machine_mode, tree);
-static int out_adj_frame_ptr (FILE *, int);
-static int out_set_stack_ptr (FILE *, int, int);
+
static RTX_CODE compare_condition (rtx insn);
static int compare_sign_p (rtx insn);
static tree avr_handle_progmem_attribute (tree *, tree, tree, int, bool *);
static tree avr_handle_fndecl_attribute (tree *, tree, tree, int, bool *);
+static tree avr_handle_fntype_attribute (tree *, tree, tree, int, bool *);
const struct attribute_spec avr_attribute_table[];
static bool avr_assemble_integer (rtx, unsigned int, int);
static void avr_file_start (void);
static void avr_file_end (void);
-static void avr_output_function_prologue (FILE *, HOST_WIDE_INT);
-static void avr_output_function_epilogue (FILE *, HOST_WIDE_INT);
+static void avr_asm_function_end_prologue (FILE *);
+static void avr_asm_function_begin_epilogue (FILE *);
+static rtx avr_function_value (const_tree, const_tree, bool);
static void avr_insert_attributes (tree, tree *);
+static void avr_asm_init_sections (void);
static unsigned int avr_section_type_flags (tree, const char *, int);
static void avr_reorg (void);
static void avr_asm_out_ctor (rtx, int);
static void avr_asm_out_dtor (rtx, int);
-static int default_rtx_costs (rtx, enum rtx_code, enum rtx_code);
-static bool avr_rtx_costs (rtx, int, int, int *);
-static int avr_address_cost (rtx);
-static bool avr_return_in_memory (tree, tree);
+static int avr_operand_rtx_cost (rtx, enum machine_mode, enum rtx_code, bool);
+static bool avr_rtx_costs (rtx, int, int, int *, bool);
+static int avr_address_cost (rtx, bool);
+static bool avr_return_in_memory (const_tree, const_tree);
+static struct machine_function * avr_init_machine_status (void);
+static rtx avr_builtin_setjmp_frame_value (void);
+static bool avr_hard_regno_scratch_ok (unsigned int);
/* Allocate registers from r25 to r8 for parameters for function calls. */
#define FIRST_CUM_REG 26
/* This holds the last insn address. */
static int last_insn_address = 0;
-/* Commands count in the compiled file */
-static int commands_in_file;
-
-/* Commands in the functions prologues in the compiled file */
-static int commands_in_prologues;
-
-/* Commands in the functions epilogues in the compiled file */
-static int commands_in_epilogues;
-
-/* Prologue/Epilogue size in words */
-static int prologue_size;
-static int epilogue_size;
-
-/* Size of all jump tables in the current function, in words. */
-static int jump_tables_size;
-
-/* Initial stack value specified by the `-minit-stack=' option */
-const char *avr_init_stack = "__stack";
-
-/* Default MCU name */
-const char *avr_mcu_name = "avr2";
-
/* Preprocessor macros to define depending on MCU type. */
-const char *avr_base_arch_macro;
const char *avr_extra_arch_macro;
-/* More than 8K of program memory: use "call" and "jmp". */
-int avr_mega_p = 0;
+/* Current architecture. */
+const struct base_arch_s *avr_current_arch;
-/* Enhanced core: use "movw", "mul", ... */
-int avr_enhanced_p = 0;
+section *progmem_section;
-/* Assembler only. */
-int avr_asm_only_p = 0;
-
-struct base_arch_s {
- int asm_only;
- int enhanced;
- int mega;
- const char *const macro;
+static const struct base_arch_s avr_arch_types[] = {
+ { 1, 0, 0, 0, 0, 0, 0, 0, NULL }, /* unknown device specified */
+ { 1, 0, 0, 0, 0, 0, 0, 0, "__AVR_ARCH__=1" },
+ { 0, 0, 0, 0, 0, 0, 0, 0, "__AVR_ARCH__=2" },
+ { 0, 0, 0, 1, 0, 0, 0, 0, "__AVR_ARCH__=25" },
+ { 0, 0, 1, 0, 0, 0, 0, 0, "__AVR_ARCH__=3" },
+ { 0, 0, 1, 0, 1, 0, 0, 0, "__AVR_ARCH__=31" },
+ { 0, 0, 1, 1, 0, 0, 0, 0, "__AVR_ARCH__=35" },
+ { 0, 1, 0, 1, 0, 0, 0, 0, "__AVR_ARCH__=4" },
+ { 0, 1, 1, 1, 0, 0, 0, 0, "__AVR_ARCH__=5" },
+ { 0, 1, 1, 1, 1, 1, 0, 0, "__AVR_ARCH__=51" },
+ { 0, 1, 1, 1, 1, 1, 1, 0, "__AVR_ARCH__=6" }
};
-static const struct base_arch_s avr_arch_types[] = {
- { 1, 0, 0, NULL }, /* unknown device specified */
- { 1, 0, 0, "__AVR_ARCH__=1" },
- { 0, 0, 0, "__AVR_ARCH__=2" },
- { 0, 0, 1, "__AVR_ARCH__=3" },
- { 0, 1, 0, "__AVR_ARCH__=4" },
- { 0, 1, 1, "__AVR_ARCH__=5" }
+/* These names are used as the index into the avr_arch_types[] table
+ above. */
+
+enum avr_arch
+{
+ ARCH_UNKNOWN,
+ ARCH_AVR1,
+ ARCH_AVR2,
+ ARCH_AVR25,
+ ARCH_AVR3,
+ ARCH_AVR31,
+ ARCH_AVR35,
+ ARCH_AVR4,
+ ARCH_AVR5,
+ ARCH_AVR51,
+ ARCH_AVR6
};
struct mcu_type_s {
static const struct mcu_type_s avr_mcu_types[] = {
/* Classic, <= 8K. */
- { "avr2", 2, NULL },
- { "at90s2313", 2, "__AVR_AT90S2313__" },
- { "at90s2323", 2, "__AVR_AT90S2323__" },
- { "at90s2333", 2, "__AVR_AT90S2333__" },
- { "at90s2343", 2, "__AVR_AT90S2343__" },
- { "attiny22", 2, "__AVR_ATtiny22__" },
- { "attiny26", 2, "__AVR_ATtiny26__" },
- { "at90s4414", 2, "__AVR_AT90S4414__" },
- { "at90s4433", 2, "__AVR_AT90S4433__" },
- { "at90s4434", 2, "__AVR_AT90S4434__" },
- { "at90s8515", 2, "__AVR_AT90S8515__" },
- { "at90c8534", 2, "__AVR_AT90C8534__" },
- { "at90s8535", 2, "__AVR_AT90S8535__" },
- { "at86rf401", 2, "__AVR_AT86RF401__" },
- /* Classic, > 8K. */
- { "avr3", 3, NULL },
- { "atmega103", 3, "__AVR_ATmega103__" },
- { "atmega603", 3, "__AVR_ATmega603__" },
- { "at43usb320", 3, "__AVR_AT43USB320__" },
- { "at43usb355", 3, "__AVR_AT43USB355__" },
- { "at76c711", 3, "__AVR_AT76C711__" },
+ { "avr2", ARCH_AVR2, NULL },
+ { "at90s2313", ARCH_AVR2, "__AVR_AT90S2313__" },
+ { "at90s2323", ARCH_AVR2, "__AVR_AT90S2323__" },
+ { "at90s2333", ARCH_AVR2, "__AVR_AT90S2333__" },
+ { "at90s2343", ARCH_AVR2, "__AVR_AT90S2343__" },
+ { "attiny22", ARCH_AVR2, "__AVR_ATtiny22__" },
+ { "attiny26", ARCH_AVR2, "__AVR_ATtiny26__" },
+ { "at90s4414", ARCH_AVR2, "__AVR_AT90S4414__" },
+ { "at90s4433", ARCH_AVR2, "__AVR_AT90S4433__" },
+ { "at90s4434", ARCH_AVR2, "__AVR_AT90S4434__" },
+ { "at90s8515", ARCH_AVR2, "__AVR_AT90S8515__" },
+ { "at90c8534", ARCH_AVR2, "__AVR_AT90C8534__" },
+ { "at90s8535", ARCH_AVR2, "__AVR_AT90S8535__" },
+ /* Classic + MOVW, <= 8K. */
+ { "avr25", ARCH_AVR25, NULL },
+ { "attiny13", ARCH_AVR25, "__AVR_ATtiny13__" },
+ { "attiny13a", ARCH_AVR25, "__AVR_ATtiny13A__" },
+ { "attiny2313", ARCH_AVR25, "__AVR_ATtiny2313__" },
+ { "attiny24", ARCH_AVR25, "__AVR_ATtiny24__" },
+ { "attiny44", ARCH_AVR25, "__AVR_ATtiny44__" },
+ { "attiny84", ARCH_AVR25, "__AVR_ATtiny84__" },
+ { "attiny25", ARCH_AVR25, "__AVR_ATtiny25__" },
+ { "attiny45", ARCH_AVR25, "__AVR_ATtiny45__" },
+ { "attiny85", ARCH_AVR25, "__AVR_ATtiny85__" },
+ { "attiny261", ARCH_AVR25, "__AVR_ATtiny261__" },
+ { "attiny461", ARCH_AVR25, "__AVR_ATtiny461__" },
+ { "attiny861", ARCH_AVR25, "__AVR_ATtiny861__" },
+ { "attiny43u", ARCH_AVR25, "__AVR_ATtiny43U__" },
+ { "attiny87", ARCH_AVR25, "__AVR_ATtiny87__" },
+ { "attiny48", ARCH_AVR25, "__AVR_ATtiny48__" },
+ { "attiny88", ARCH_AVR25, "__AVR_ATtiny88__" },
+ { "at86rf401", ARCH_AVR25, "__AVR_AT86RF401__" },
+ /* Classic, > 8K, <= 64K. */
+ { "avr3", ARCH_AVR3, NULL },
+ { "at43usb355", ARCH_AVR3, "__AVR_AT43USB355__" },
+ { "at76c711", ARCH_AVR3, "__AVR_AT76C711__" },
+ /* Classic, == 128K. */
+ { "avr31", ARCH_AVR31, NULL },
+ { "atmega103", ARCH_AVR31, "__AVR_ATmega103__" },
+ { "at43usb320", ARCH_AVR31, "__AVR_AT43USB320__" },
+ /* Classic + MOVW + JMP/CALL. */
+ { "avr35", ARCH_AVR35, NULL },
+ { "at90usb82", ARCH_AVR35, "__AVR_AT90USB82__" },
+ { "at90usb162", ARCH_AVR35, "__AVR_AT90USB162__" },
+ { "attiny167", ARCH_AVR35, "__AVR_ATtiny167__" },
+ { "attiny327", ARCH_AVR35, "__AVR_ATtiny327__" },
/* Enhanced, <= 8K. */
- { "avr4", 4, NULL },
- { "atmega8", 4, "__AVR_ATmega8__" },
- { "atmega8515", 4, "__AVR_ATmega8515__" },
- { "atmega8535", 4, "__AVR_ATmega8535__" },
- /* Enhanced, > 8K. */
- { "avr5", 5, NULL },
- { "atmega16", 5, "__AVR_ATmega16__" },
- { "atmega161", 5, "__AVR_ATmega161__" },
- { "atmega162", 5, "__AVR_ATmega162__" },
- { "atmega163", 5, "__AVR_ATmega163__" },
- { "atmega169", 5, "__AVR_ATmega169__" },
- { "atmega32", 5, "__AVR_ATmega32__" },
- { "atmega323", 5, "__AVR_ATmega323__" },
- { "atmega64", 5, "__AVR_ATmega64__" },
- { "atmega128", 5, "__AVR_ATmega128__" },
- { "at94k", 5, "__AVR_AT94K__" },
+ { "avr4", ARCH_AVR4, NULL },
+ { "atmega8", ARCH_AVR4, "__AVR_ATmega8__" },
+ { "atmega48", ARCH_AVR4, "__AVR_ATmega48__" },
+ { "atmega48p", ARCH_AVR4, "__AVR_ATmega48P__" },
+ { "atmega88", ARCH_AVR4, "__AVR_ATmega88__" },
+ { "atmega88p", ARCH_AVR4, "__AVR_ATmega88P__" },
+ { "atmega8515", ARCH_AVR4, "__AVR_ATmega8515__" },
+ { "atmega8535", ARCH_AVR4, "__AVR_ATmega8535__" },
+ { "atmega8hva", ARCH_AVR4, "__AVR_ATmega8HVA__" },
+ { "atmega4hvd", ARCH_AVR4, "__AVR_ATmega4HVD__" },
+ { "atmega8hvd", ARCH_AVR4, "__AVR_ATmega8HVD__" },
+ { "at90pwm1", ARCH_AVR4, "__AVR_AT90PWM1__" },
+ { "at90pwm2", ARCH_AVR4, "__AVR_AT90PWM2__" },
+ { "at90pwm2b", ARCH_AVR4, "__AVR_AT90PWM2B__" },
+ { "at90pwm3", ARCH_AVR4, "__AVR_AT90PWM3__" },
+ { "at90pwm3b", ARCH_AVR4, "__AVR_AT90PWM3B__" },
+ { "at90pwm81", ARCH_AVR4, "__AVR_AT90PWM81__" },
+ /* Enhanced, > 8K, <= 64K. */
+ { "avr5", ARCH_AVR5, NULL },
+ { "atmega16", ARCH_AVR5, "__AVR_ATmega16__" },
+ { "atmega161", ARCH_AVR5, "__AVR_ATmega161__" },
+ { "atmega162", ARCH_AVR5, "__AVR_ATmega162__" },
+ { "atmega163", ARCH_AVR5, "__AVR_ATmega163__" },
+ { "atmega164p", ARCH_AVR5, "__AVR_ATmega164P__" },
+ { "atmega165", ARCH_AVR5, "__AVR_ATmega165__" },
+ { "atmega165p", ARCH_AVR5, "__AVR_ATmega165P__" },
+ { "atmega168", ARCH_AVR5, "__AVR_ATmega168__" },
+ { "atmega168p", ARCH_AVR5, "__AVR_ATmega168P__" },
+ { "atmega169", ARCH_AVR5, "__AVR_ATmega169__" },
+ { "atmega169p", ARCH_AVR5, "__AVR_ATmega169P__" },
+ { "atmega32", ARCH_AVR5, "__AVR_ATmega32__" },
+ { "atmega323", ARCH_AVR5, "__AVR_ATmega323__" },
+ { "atmega324p", ARCH_AVR5, "__AVR_ATmega324P__" },
+ { "atmega325", ARCH_AVR5, "__AVR_ATmega325__" },
+ { "atmega325p", ARCH_AVR5, "__AVR_ATmega325P__" },
+ { "atmega3250", ARCH_AVR5, "__AVR_ATmega3250__" },
+ { "atmega3250p", ARCH_AVR5, "__AVR_ATmega3250P__" },
+ { "atmega328p", ARCH_AVR5, "__AVR_ATmega328P__" },
+ { "atmega329", ARCH_AVR5, "__AVR_ATmega329__" },
+ { "atmega329p", ARCH_AVR5, "__AVR_ATmega329P__" },
+ { "atmega3290", ARCH_AVR5, "__AVR_ATmega3290__" },
+ { "atmega3290p", ARCH_AVR5, "__AVR_ATmega3290P__" },
+ { "atmega406", ARCH_AVR5, "__AVR_ATmega406__" },
+ { "atmega64", ARCH_AVR5, "__AVR_ATmega64__" },
+ { "atmega640", ARCH_AVR5, "__AVR_ATmega640__" },
+ { "atmega644", ARCH_AVR5, "__AVR_ATmega644__" },
+ { "atmega644p", ARCH_AVR5, "__AVR_ATmega644P__" },
+ { "atmega645", ARCH_AVR5, "__AVR_ATmega645__" },
+ { "atmega6450", ARCH_AVR5, "__AVR_ATmega6450__" },
+ { "atmega649", ARCH_AVR5, "__AVR_ATmega649__" },
+ { "atmega6490", ARCH_AVR5, "__AVR_ATmega6490__" },
+ { "atmega16hva", ARCH_AVR5, "__AVR_ATmega16HVA__" },
+ { "atmega16hvb", ARCH_AVR5, "__AVR_ATmega16HVB__" },
+ { "atmega32hvb", ARCH_AVR5, "__AVR_ATmega32HVB__" },
+ { "at90can32", ARCH_AVR5, "__AVR_AT90CAN32__" },
+ { "at90can64", ARCH_AVR5, "__AVR_AT90CAN64__" },
+ { "at90pwm216", ARCH_AVR5, "__AVR_AT90PWM216__" },
+ { "at90pwm316", ARCH_AVR5, "__AVR_AT90PWM316__" },
+ { "atmega32c1", ARCH_AVR5, "__AVR_ATmega32C1__" },
+ { "atmega64c1", ARCH_AVR5, "__AVR_ATmega64C1__" },
+ { "atmega16m1", ARCH_AVR5, "__AVR_ATmega16M1__" },
+ { "atmega32m1", ARCH_AVR5, "__AVR_ATmega32M1__" },
+ { "atmega64m1", ARCH_AVR5, "__AVR_ATmega64M1__" },
+ { "atmega16u4", ARCH_AVR5, "__AVR_ATmega16U4__" },
+ { "atmega32u4", ARCH_AVR5, "__AVR_ATmega32U4__" },
+ { "atmega32u6", ARCH_AVR5, "__AVR_ATmega32U6__" },
+ { "at90scr100", ARCH_AVR5, "__AVR_AT90SCR100__" },
+ { "at90usb646", ARCH_AVR5, "__AVR_AT90USB646__" },
+ { "at90usb647", ARCH_AVR5, "__AVR_AT90USB647__" },
+ { "at94k", ARCH_AVR5, "__AVR_AT94K__" },
+ /* Enhanced, == 128K. */
+ { "avr51", ARCH_AVR51, NULL },
+ { "atmega128", ARCH_AVR51, "__AVR_ATmega128__" },
+ { "atmega1280", ARCH_AVR51, "__AVR_ATmega1280__" },
+ { "atmega1281", ARCH_AVR51, "__AVR_ATmega1281__" },
+ { "atmega1284p", ARCH_AVR51, "__AVR_ATmega1284P__" },
+ { "atmega128rfa1", ARCH_AVR51, "__AVR_ATmega128RFA1__" },
+ { "at90can128", ARCH_AVR51, "__AVR_AT90CAN128__" },
+ { "at90usb1286", ARCH_AVR51, "__AVR_AT90USB1286__" },
+ { "at90usb1287", ARCH_AVR51, "__AVR_AT90USB1287__" },
+ { "m3000f", ARCH_AVR51, "__AVR_M3000F__" },
+ { "m3000s", ARCH_AVR51, "__AVR_M3000S__" },
+ { "m3001b", ARCH_AVR51, "__AVR_M3001B__" },
+ /* 3-Byte PC. */
+ { "avr6", ARCH_AVR6, NULL },
+ { "atmega2560", ARCH_AVR6, "__AVR_ATmega2560__" },
+ { "atmega2561", ARCH_AVR6, "__AVR_ATmega2561__" },
/* Assembler only. */
- { "avr1", 1, NULL },
- { "at90s1200", 1, "__AVR_AT90S1200__" },
- { "attiny11", 1, "__AVR_ATtiny11__" },
- { "attiny12", 1, "__AVR_ATtiny12__" },
- { "attiny15", 1, "__AVR_ATtiny15__" },
- { "attiny28", 1, "__AVR_ATtiny28__" },
- { NULL, 0, NULL }
+ { "avr1", ARCH_AVR1, NULL },
+ { "at90s1200", ARCH_AVR1, "__AVR_AT90S1200__" },
+ { "attiny11", ARCH_AVR1, "__AVR_ATtiny11__" },
+ { "attiny12", ARCH_AVR1, "__AVR_ATtiny12__" },
+ { "attiny15", ARCH_AVR1, "__AVR_ATtiny15__" },
+ { "attiny28", ARCH_AVR1, "__AVR_ATtiny28__" },
+ { NULL, ARCH_UNKNOWN, NULL }
};
int avr_case_values_threshold = 30000;
/* Initialize the GCC target structure. */
#undef TARGET_ASM_ALIGNED_HI_OP
#define TARGET_ASM_ALIGNED_HI_OP "\t.word\t"
+#undef TARGET_ASM_ALIGNED_SI_OP
+#define TARGET_ASM_ALIGNED_SI_OP "\t.long\t"
+#undef TARGET_ASM_UNALIGNED_HI_OP
+#define TARGET_ASM_UNALIGNED_HI_OP "\t.word\t"
+#undef TARGET_ASM_UNALIGNED_SI_OP
+#define TARGET_ASM_UNALIGNED_SI_OP "\t.long\t"
#undef TARGET_ASM_INTEGER
#define TARGET_ASM_INTEGER avr_assemble_integer
#undef TARGET_ASM_FILE_START
#undef TARGET_ASM_FILE_END
#define TARGET_ASM_FILE_END avr_file_end
-#undef TARGET_ASM_FUNCTION_PROLOGUE
-#define TARGET_ASM_FUNCTION_PROLOGUE avr_output_function_prologue
-#undef TARGET_ASM_FUNCTION_EPILOGUE
-#define TARGET_ASM_FUNCTION_EPILOGUE avr_output_function_epilogue
+#undef TARGET_ASM_FUNCTION_END_PROLOGUE
+#define TARGET_ASM_FUNCTION_END_PROLOGUE avr_asm_function_end_prologue
+#undef TARGET_ASM_FUNCTION_BEGIN_EPILOGUE
+#define TARGET_ASM_FUNCTION_BEGIN_EPILOGUE avr_asm_function_begin_epilogue
+#undef TARGET_FUNCTION_VALUE
+#define TARGET_FUNCTION_VALUE avr_function_value
#undef TARGET_ATTRIBUTE_TABLE
#define TARGET_ATTRIBUTE_TABLE avr_attribute_table
#undef TARGET_ASM_FUNCTION_RODATA_SECTION
#undef TARGET_STRICT_ARGUMENT_NAMING
#define TARGET_STRICT_ARGUMENT_NAMING hook_bool_CUMULATIVE_ARGS_true
+#undef TARGET_BUILTIN_SETJMP_FRAME_VALUE
+#define TARGET_BUILTIN_SETJMP_FRAME_VALUE avr_builtin_setjmp_frame_value
+
+#undef TARGET_HARD_REGNO_SCRATCH_OK
+#define TARGET_HARD_REGNO_SCRATCH_OK avr_hard_regno_scratch_ok
+
struct gcc_target targetm = TARGET_INITIALIZER;
\f
void
avr_override_options (void)
{
const struct mcu_type_s *t;
- const struct base_arch_s *base;
+
+ flag_delete_null_pointer_checks = 0;
+
+ if (!PARAM_SET_P (PARAM_INLINE_CALL_COST))
+ set_param_value ("inline-call-cost", 5);
for (t = avr_mcu_types; t->name; t++)
if (strcmp (t->name, avr_mcu_name) == 0)
if (!t->name)
{
- fprintf (stderr, "unknown MCU `%s' specified\nKnown MCU names:\n",
+ fprintf (stderr, "unknown MCU '%s' specified\nKnown MCU names:\n",
avr_mcu_name);
for (t = avr_mcu_types; t->name; t++)
fprintf (stderr," %s\n", t->name);
}
- base = &avr_arch_types[t->arch];
- avr_asm_only_p = base->asm_only;
- avr_enhanced_p = base->enhanced;
- avr_mega_p = base->mega;
- avr_base_arch_macro = base->macro;
+ avr_current_arch = &avr_arch_types[t->arch];
avr_extra_arch_macro = t->macro;
if (optimize && !TARGET_NO_TABLEJUMP)
- avr_case_values_threshold = (!AVR_MEGA || TARGET_CALL_PROLOGUES) ? 8 : 17;
+ avr_case_values_threshold =
+ (!AVR_HAVE_JMP_CALL || TARGET_CALL_PROLOGUES) ? 8 : 17;
tmp_reg_rtx = gen_rtx_REG (QImode, TMP_REGNO);
zero_reg_rtx = gen_rtx_REG (QImode, ZERO_REGNO);
+
+ init_machine_status = avr_init_machine_status;
}
/* return register class from register number. */
STACK_REG,STACK_REG /* SPL,SPH */
};
+/* Function to set up the backend function structure. */
+
+static struct machine_function *
+avr_init_machine_status (void)
+{
+ return ((struct machine_function *)
+ ggc_alloc_cleared (sizeof (struct machine_function)));
+}
+
/* Return register class for register R. */
enum reg_class
return ALL_REGS;
}
-
-/* A C expression which defines the machine-dependent operand
- constraint letters for register classes. If C is such a
- letter, the value should be the register class corresponding to
- it. Otherwise, the value should be `NO_REGS'. The register
- letter `r', corresponding to class `GENERAL_REGS', will not be
- passed to this macro; you do not need to handle it. */
-
-enum reg_class
-avr_reg_class_from_letter (int c)
-{
- switch (c)
- {
- case 't' : return R0_REG;
- case 'b' : return BASE_POINTER_REGS;
- case 'e' : return POINTER_REGS;
- case 'w' : return ADDW_REGS;
- case 'd' : return LD_REGS;
- case 'l' : return NO_LD_REGS;
- case 'a' : return SIMPLE_LD_REGS;
- case 'x' : return POINTER_X_REGS;
- case 'y' : return POINTER_Y_REGS;
- case 'z' : return POINTER_Z_REGS;
- case 'q' : return STACK_REG;
- default: break;
- }
- return NO_REGS;
-}
-
/* Return nonzero if FUNC is a naked function. */
static int
{
tree a;
- if (TREE_CODE (func) != FUNCTION_DECL)
- abort ();
+ gcc_assert (TREE_CODE (func) == FUNCTION_DECL);
- a = lookup_attribute ("naked", DECL_ATTRIBUTES (func));
+ a = lookup_attribute ("naked", TYPE_ATTRIBUTES (TREE_TYPE (func)));
return a != NULL_TREE;
}
return a != NULL_TREE;
}
+/* Return nonzero if FUNC is a OS_task function. */
+
+static int
+avr_OS_task_function_p (tree func)
+{
+ tree a;
+
+ gcc_assert (TREE_CODE (func) == FUNCTION_DECL);
+
+ a = lookup_attribute ("OS_task", TYPE_ATTRIBUTES (TREE_TYPE (func)));
+ return a != NULL_TREE;
+}
+
+/* Return nonzero if FUNC is a OS_main function. */
+
+static int
+avr_OS_main_function_p (tree func)
+{
+ tree a;
+
+ gcc_assert (TREE_CODE (func) == FUNCTION_DECL);
+
+ a = lookup_attribute ("OS_main", TYPE_ATTRIBUTES (TREE_TYPE (func)));
+ return a != NULL_TREE;
+}
+
/* Return the number of hard registers to push/pop in the prologue/epilogue
of the current function, and optionally store these registers in SET. */
int reg, count;
int int_or_sig_p = (interrupt_function_p (current_function_decl)
|| signal_function_p (current_function_decl));
- int leaf_func_p = leaf_function_p ();
+
+ if (!reload_completed)
+ cfun->machine->is_leaf = leaf_function_p ();
if (set)
CLEAR_HARD_REG_SET (*set);
count = 0;
- /* No need to save any registers if the function never returns. */
- if (TREE_THIS_VOLATILE (current_function_decl))
+ /* No need to save any registers if the function never returns or
+ is have "OS_task" or "OS_main" attribute. */
+ if (TREE_THIS_VOLATILE (current_function_decl)
+ || cfun->machine->is_OS_task
+ || cfun->machine->is_OS_main)
return 0;
for (reg = 0; reg < 32; reg++)
if (fixed_regs[reg])
continue;
- if ((int_or_sig_p && !leaf_func_p && call_used_regs[reg])
- || (regs_ever_live[reg]
+ if ((int_or_sig_p && !cfun->machine->is_leaf && call_used_regs[reg])
+ || (df_regs_ever_live_p (reg)
&& (int_or_sig_p || !call_used_regs[reg])
&& !(frame_pointer_needed
&& (reg == REG_Y || reg == (REG_Y+1)))))
else
{
int offset = frame_pointer_needed ? 2 : 0;
+ int avr_pc_size = AVR_HAVE_EIJMP_EICALL ? 3 : 2;
offset += avr_regs_to_save (NULL);
- return get_frame_size () + 2 + 1 + offset;
+ return get_frame_size () + (avr_pc_size) + 1 + offset;
}
}
+/* Actual start of frame is virtual_stack_vars_rtx this is offset from
+ frame pointer by +STARTING_FRAME_OFFSET.
+ Using saved frame = virtual_stack_vars_rtx - STARTING_FRAME_OFFSET
+ avoids creating add/sub of offset in nonlocal goto and setjmp. */
+
+rtx avr_builtin_setjmp_frame_value (void)
+{
+ return gen_rtx_MINUS (Pmode, virtual_stack_vars_rtx,
+ gen_int_mode (STARTING_FRAME_OFFSET, Pmode));
+}
+
/* Return 1 if the function epilogue is just a single "ret". */
int
&& ! interrupt_function_p (current_function_decl)
&& ! signal_function_p (current_function_decl)
&& ! avr_naked_function_p (current_function_decl)
- && ! MAIN_NAME_P (DECL_NAME (current_function_decl))
&& ! TREE_THIS_VOLATILE (current_function_decl));
}
{
if (!call_used_regs[reg])
{
- if (regs_ever_live[reg])
+ if (df_regs_ever_live_p (reg))
{
++live_seq;
++cur_seq;
if (!frame_pointer_needed)
{
- if (regs_ever_live[REG_Y])
+ if (df_regs_ever_live_p (REG_Y))
{
++live_seq;
++cur_seq;
else
cur_seq = 0;
- if (regs_ever_live[REG_Y+1])
+ if (df_regs_ever_live_p (REG_Y+1))
{
++live_seq;
++cur_seq;
return (cur_seq == live_seq) ? live_seq : 0;
}
+/* Obtain the length sequence of insns. */
-/* Output to FILE the asm instructions to adjust the frame pointer by
- ADJ (r29:r28 -= ADJ;) which can be positive (prologue) or negative
- (epilogue). Returns the number of instructions generated. */
-
-static int
-out_adj_frame_ptr (FILE *file, int adj)
-{
- int size = 0;
-
- if (adj)
- {
- if (TARGET_TINY_STACK)
- {
- if (adj < -63 || adj > 63)
- warning ("large frame pointer change (%d) with -mtiny-stack", adj);
-
- /* The high byte (r29) doesn't change - prefer "subi" (1 cycle)
- over "sbiw" (2 cycles, same size). */
-
- fprintf (file, (AS2 (subi, r28, %d) CR_TAB), adj);
- size++;
- }
- else if (adj < -63 || adj > 63)
- {
- fprintf (file, (AS2 (subi, r28, lo8(%d)) CR_TAB
- AS2 (sbci, r29, hi8(%d)) CR_TAB),
- adj, adj);
- size += 2;
- }
- else if (adj < 0)
- {
- fprintf (file, (AS2 (adiw, r28, %d) CR_TAB), -adj);
- size++;
- }
- else
- {
- fprintf (file, (AS2 (sbiw, r28, %d) CR_TAB), adj);
- size++;
- }
- }
- return size;
-}
-
-
-/* Output to FILE the asm instructions to copy r29:r28 to SPH:SPL,
- handling various cases of interrupt enable flag state BEFORE and AFTER
- (0=disabled, 1=enabled, -1=unknown/unchanged) and target_flags.
- Returns the number of instructions generated. */
-
-static int
-out_set_stack_ptr (FILE *file, int before, int after)
+int
+get_sequence_length (rtx insns)
{
- int do_sph, do_cli, do_save, do_sei, lock_sph, size;
-
- /* The logic here is so that -mno-interrupts actually means
- "it is safe to write SPH in one instruction, then SPL in the
- next instruction, without disabling interrupts first".
- The after != -1 case (interrupt/signal) is not affected. */
-
- do_sph = !TARGET_TINY_STACK;
- lock_sph = do_sph && !TARGET_NO_INTERRUPTS;
- do_cli = (before != 0 && (after == 0 || lock_sph));
- do_save = (do_cli && before == -1 && after == -1);
- do_sei = ((do_cli || before != 1) && after == 1);
- size = 1;
-
- if (do_save)
- {
- fprintf (file, AS2 (in, __tmp_reg__, __SREG__) CR_TAB);
- size++;
- }
-
- if (do_cli)
- {
- fprintf (file, "cli" CR_TAB);
- size++;
- }
-
- /* Do SPH first - maybe this will disable interrupts for one instruction
- someday (a suggestion has been sent to avr@atmel.com for consideration
- in future devices - that would make -mno-interrupts always safe). */
- if (do_sph)
- {
- fprintf (file, AS2 (out, __SP_H__, r29) CR_TAB);
- size++;
- }
-
- /* Set/restore the I flag now - interrupts will be really enabled only
- after the next instruction. This is not clearly documented, but
- believed to be true for all AVR devices. */
- if (do_save)
- {
- fprintf (file, AS2 (out, __SREG__, __tmp_reg__) CR_TAB);
- size++;
- }
- else if (do_sei)
- {
- fprintf (file, "sei" CR_TAB);
- size++;
- }
-
- fprintf (file, AS2 (out, __SP_L__, r28) "\n");
-
- return size;
+ rtx insn;
+ int length;
+
+ for (insn = insns, length = 0; insn; insn = NEXT_INSN (insn))
+ length += get_attr_length (insn);
+
+ return length;
}
+/* Output function prologue. */
-/* Output function prologue. */
-
-static void
-avr_output_function_prologue (FILE *file, HOST_WIDE_INT size)
+void
+expand_prologue (void)
{
- int reg;
- int interrupt_func_p;
- int signal_func_p;
- int main_p;
int live_seq;
+ HARD_REG_SET set;
int minimize;
+ HOST_WIDE_INT size = get_frame_size();
+ /* Define templates for push instructions. */
+ rtx pushbyte = gen_rtx_MEM (QImode,
+ gen_rtx_POST_DEC (HImode, stack_pointer_rtx));
+ rtx pushword = gen_rtx_MEM (HImode,
+ gen_rtx_POST_DEC (HImode, stack_pointer_rtx));
+ rtx insn;
last_insn_address = 0;
- jump_tables_size = 0;
- prologue_size = 0;
- fprintf (file, "/* prologue: frame size=" HOST_WIDE_INT_PRINT_DEC " */\n",
- size);
-
- if (avr_naked_function_p (current_function_decl))
+
+ /* Init cfun->machine. */
+ cfun->machine->is_naked = avr_naked_function_p (current_function_decl);
+ cfun->machine->is_interrupt = interrupt_function_p (current_function_decl);
+ cfun->machine->is_signal = signal_function_p (current_function_decl);
+ cfun->machine->is_OS_task = avr_OS_task_function_p (current_function_decl);
+ cfun->machine->is_OS_main = avr_OS_main_function_p (current_function_decl);
+
+ /* Prologue: naked. */
+ if (cfun->machine->is_naked)
{
- fputs ("/* prologue: naked */\n", file);
- goto out;
+ return;
}
- interrupt_func_p = interrupt_function_p (current_function_decl);
- signal_func_p = signal_function_p (current_function_decl);
- main_p = MAIN_NAME_P (DECL_NAME (current_function_decl));
+ avr_regs_to_save (&set);
live_seq = sequent_regs_live ();
minimize = (TARGET_CALL_PROLOGUES
- && !interrupt_func_p && !signal_func_p && live_seq);
+ && !cfun->machine->is_interrupt
+ && !cfun->machine->is_signal
+ && !cfun->machine->is_OS_task
+ && !cfun->machine->is_OS_main
+ && live_seq);
- if (interrupt_func_p)
- {
- fprintf (file,"\tsei\n");
- ++prologue_size;
- }
- if (interrupt_func_p || signal_func_p)
- {
- fprintf (file, "\t"
- AS1 (push,__zero_reg__) CR_TAB
- AS1 (push,__tmp_reg__) CR_TAB
- AS2 (in,__tmp_reg__,__SREG__) CR_TAB
- AS1 (push,__tmp_reg__) CR_TAB
- AS1 (clr,__zero_reg__) "\n");
- prologue_size += 5;
- }
- if (main_p)
+ if (cfun->machine->is_interrupt || cfun->machine->is_signal)
{
- fprintf (file, ("\t"
- AS1 (ldi,r28) ",lo8(%s - " HOST_WIDE_INT_PRINT_DEC ")" CR_TAB
- AS1 (ldi,r29) ",hi8(%s - " HOST_WIDE_INT_PRINT_DEC ")" CR_TAB
- AS2 (out,__SP_H__,r29) CR_TAB
- AS2 (out,__SP_L__,r28) "\n"),
- avr_init_stack, size, avr_init_stack, size);
-
- prologue_size += 4;
+ if (cfun->machine->is_interrupt)
+ {
+ /* Enable interrupts. */
+ insn = emit_insn (gen_enable_interrupt ());
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
+
+ /* Push zero reg. */
+ insn = emit_move_insn (pushbyte, zero_reg_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ /* Push tmp reg. */
+ insn = emit_move_insn (pushbyte, tmp_reg_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ /* Push SREG. */
+ insn = emit_move_insn (tmp_reg_rtx,
+ gen_rtx_MEM (QImode, GEN_INT (SREG_ADDR)));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ insn = emit_move_insn (pushbyte, tmp_reg_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ /* Push RAMPZ. */
+ if(AVR_HAVE_RAMPZ
+ && (TEST_HARD_REG_BIT (set, REG_Z) && TEST_HARD_REG_BIT (set, REG_Z + 1)))
+ {
+ insn = emit_move_insn (tmp_reg_rtx,
+ gen_rtx_MEM (QImode, GEN_INT (RAMPZ_ADDR)));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ insn = emit_move_insn (pushbyte, tmp_reg_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
+
+ /* Clear zero reg. */
+ insn = emit_move_insn (zero_reg_rtx, const0_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ /* Prevent any attempt to delete the setting of ZERO_REG! */
+ emit_use (zero_reg_rtx);
}
- else if (minimize && (frame_pointer_needed || live_seq > 6))
+ if (minimize && (frame_pointer_needed
+ || (AVR_2_BYTE_PC && live_seq > 6)
+ || live_seq > 7))
{
- const char *cfun_name = current_function_name ();
- fprintf (file, ("\t"
- AS1 (ldi, r26) ",lo8(" HOST_WIDE_INT_PRINT_DEC ")" CR_TAB
- AS1 (ldi, r27) ",hi8(" HOST_WIDE_INT_PRINT_DEC ")" CR_TAB), size, size);
-
- fprintf (file, (AS2 (ldi, r30, pm_lo8(.L_%s_body)) CR_TAB
- AS2 (ldi, r31, pm_hi8(.L_%s_body)) CR_TAB),
- cfun_name, cfun_name);
-
- prologue_size += 4;
-
- if (AVR_MEGA)
- {
- fprintf (file, AS1 (jmp,__prologue_saves__+%d) "\n",
- (18 - live_seq) * 2);
- prologue_size += 2;
- }
- else
- {
- fprintf (file, AS1 (rjmp,__prologue_saves__+%d) "\n",
- (18 - live_seq) * 2);
- ++prologue_size;
- }
- fprintf (file, ".L_%s_body:\n", cfun_name);
+ insn = emit_move_insn (gen_rtx_REG (HImode, REG_X),
+ gen_int_mode (size, HImode));
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ insn =
+ emit_insn (gen_call_prologue_saves (gen_int_mode (live_seq, HImode),
+ gen_int_mode (size + live_seq, HImode)));
+ RTX_FRAME_RELATED_P (insn) = 1;
}
else
{
- HARD_REG_SET set;
-
- prologue_size += avr_regs_to_save (&set);
+ int reg;
for (reg = 0; reg < 32; ++reg)
- {
- if (TEST_HARD_REG_BIT (set, reg))
- {
- fprintf (file, "\t" AS1 (push,%s) "\n", avr_regnames[reg]);
- }
- }
+ {
+ if (TEST_HARD_REG_BIT (set, reg))
+ {
+ /* Emit push of register to save. */
+ insn=emit_move_insn (pushbyte, gen_rtx_REG (QImode, reg));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
+ }
if (frame_pointer_needed)
- {
- fprintf (file, "\t"
- AS1 (push,r28) CR_TAB
- AS1 (push,r29) CR_TAB
- AS2 (in,r28,__SP_L__) CR_TAB
- AS2 (in,r29,__SP_H__) "\n");
- prologue_size += 4;
- if (size)
+ {
+ if (!(cfun->machine->is_OS_task || cfun->machine->is_OS_main))
{
- fputs ("\t", file);
- prologue_size += out_adj_frame_ptr (file, size);
+ /* Push frame pointer. */
+ insn = emit_move_insn (pushword, frame_pointer_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
- if (interrupt_func_p)
+ if (!size)
+ {
+ insn = emit_move_insn (frame_pointer_rtx, stack_pointer_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
+ else
+ {
+ /* Creating a frame can be done by direct manipulation of the
+ stack or via the frame pointer. These two methods are:
+ fp=sp
+ fp-=size
+ sp=fp
+ OR
+ sp-=size
+ fp=sp
+ the optimum method depends on function type, stack and frame size.
+ To avoid a complex logic, both methods are tested and shortest
+ is selected. */
+ rtx myfp;
+ rtx fp_plus_insns;
+ rtx sp_plus_insns = NULL_RTX;
+
+ if (TARGET_TINY_STACK)
+ {
+ /* The high byte (r29) doesn't change - prefer 'subi' (1 cycle)
+ over 'sbiw' (2 cycles, same size). */
+ myfp = gen_rtx_REG (QImode, REGNO (frame_pointer_rtx));
+ }
+ else
+ {
+ /* Normal sized addition. */
+ myfp = frame_pointer_rtx;
+ }
+
+ /* Method 1-Adjust frame pointer. */
+ start_sequence ();
+
+ insn = emit_move_insn (frame_pointer_rtx, stack_pointer_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ insn =
+ emit_move_insn (myfp,
+ gen_rtx_PLUS (GET_MODE(myfp), myfp,
+ gen_int_mode (-size,
+ GET_MODE(myfp))));
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ /* Copy to stack pointer. */
+ if (TARGET_TINY_STACK)
+ {
+ insn = emit_move_insn (stack_pointer_rtx, frame_pointer_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
+ else if (TARGET_NO_INTERRUPTS
+ || cfun->machine->is_signal
+ || cfun->machine->is_OS_main)
{
- prologue_size += out_set_stack_ptr (file, 1, 1);
+ insn =
+ emit_insn (gen_movhi_sp_r_irq_off (stack_pointer_rtx,
+ frame_pointer_rtx));
+ RTX_FRAME_RELATED_P (insn) = 1;
}
- else if (signal_func_p)
+ else if (cfun->machine->is_interrupt)
{
- prologue_size += out_set_stack_ptr (file, 0, 0);
+ insn = emit_insn (gen_movhi_sp_r_irq_on (stack_pointer_rtx,
+ frame_pointer_rtx));
+ RTX_FRAME_RELATED_P (insn) = 1;
}
else
{
- prologue_size += out_set_stack_ptr (file, -1, -1);
+ insn = emit_move_insn (stack_pointer_rtx, frame_pointer_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
}
- }
- }
- }
- out:
- fprintf (file, "/* prologue end (size=%d) */\n", prologue_size);
+ fp_plus_insns = get_insns ();
+ end_sequence ();
+
+ /* Method 2-Adjust Stack pointer. */
+ if (size <= 6)
+ {
+ start_sequence ();
+
+ insn =
+ emit_move_insn (stack_pointer_rtx,
+ gen_rtx_PLUS (HImode,
+ stack_pointer_rtx,
+ gen_int_mode (-size,
+ HImode)));
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ insn =
+ emit_move_insn (frame_pointer_rtx, stack_pointer_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ sp_plus_insns = get_insns ();
+ end_sequence ();
+ }
+
+ /* Use shortest method. */
+ if (size <= 6 && (get_sequence_length (sp_plus_insns)
+ < get_sequence_length (fp_plus_insns)))
+ emit_insn (sp_plus_insns);
+ else
+ emit_insn (fp_plus_insns);
+ }
+ }
+ }
}
-/* Output function epilogue. */
+/* Output summary at end of function prologue. */
static void
-avr_output_function_epilogue (FILE *file, HOST_WIDE_INT size)
+avr_asm_function_end_prologue (FILE *file)
{
- int reg;
- int interrupt_func_p;
- int signal_func_p;
- int main_p;
- int function_size;
- int live_seq;
- int minimize;
- rtx last = get_last_nonnote_insn ();
-
- function_size = jump_tables_size;
- if (last)
+ if (cfun->machine->is_naked)
{
- rtx first = get_first_nonnote_insn ();
- function_size += (INSN_ADDRESSES (INSN_UID (last)) -
- INSN_ADDRESSES (INSN_UID (first)));
- function_size += get_attr_length (last);
+ fputs ("/* prologue: naked */\n", file);
}
-
- fprintf (file, "/* epilogue: frame size=" HOST_WIDE_INT_PRINT_DEC " */\n", size);
- epilogue_size = 0;
-
- if (avr_naked_function_p (current_function_decl))
+ else
{
- fputs ("/* epilogue: naked */\n", file);
- goto out;
+ if (cfun->machine->is_interrupt)
+ {
+ fputs ("/* prologue: Interrupt */\n", file);
+ }
+ else if (cfun->machine->is_signal)
+ {
+ fputs ("/* prologue: Signal */\n", file);
+ }
+ else
+ fputs ("/* prologue: function */\n", file);
}
+ fprintf (file, "/* frame size = " HOST_WIDE_INT_PRINT_DEC " */\n",
+ get_frame_size());
+}
+
+
+/* Implement EPILOGUE_USES. */
+
+int
+avr_epilogue_uses (int regno ATTRIBUTE_UNUSED)
+{
+ if (reload_completed
+ && cfun->machine
+ && (cfun->machine->is_interrupt || cfun->machine->is_signal))
+ return 1;
+ return 0;
+}
- if (last && GET_CODE (last) == BARRIER)
+/* Output RTL epilogue. */
+
+void
+expand_epilogue (void)
+{
+ int reg;
+ int live_seq;
+ HARD_REG_SET set;
+ int minimize;
+ HOST_WIDE_INT size = get_frame_size();
+
+ /* epilogue: naked */
+ if (cfun->machine->is_naked)
{
- fputs ("/* epilogue: noreturn */\n", file);
- goto out;
+ emit_jump_insn (gen_return ());
+ return;
}
- interrupt_func_p = interrupt_function_p (current_function_decl);
- signal_func_p = signal_function_p (current_function_decl);
- main_p = MAIN_NAME_P (DECL_NAME (current_function_decl));
+ avr_regs_to_save (&set);
live_seq = sequent_regs_live ();
minimize = (TARGET_CALL_PROLOGUES
- && !interrupt_func_p && !signal_func_p && live_seq);
+ && !cfun->machine->is_interrupt
+ && !cfun->machine->is_signal
+ && !cfun->machine->is_OS_task
+ && !cfun->machine->is_OS_main
+ && live_seq);
- if (main_p)
- {
- /* Return value from main() is already in the correct registers
- (r25:r24) as the exit() argument. */
- if (AVR_MEGA)
- {
- fputs ("\t" AS1 (jmp,exit) "\n", file);
- epilogue_size += 2;
- }
- else
- {
- fputs ("\t" AS1 (rjmp,exit) "\n", file);
- ++epilogue_size;
- }
- }
- else if (minimize && (frame_pointer_needed || live_seq > 4))
+ if (minimize && (frame_pointer_needed || live_seq > 4))
{
- fprintf (file, ("\t" AS2 (ldi, r30, %d) CR_TAB), live_seq);
- ++epilogue_size;
if (frame_pointer_needed)
{
- epilogue_size += out_adj_frame_ptr (file, -size);
- }
- else
- {
- fprintf (file, (AS2 (in , r28, __SP_L__) CR_TAB
- AS2 (in , r29, __SP_H__) CR_TAB));
- epilogue_size += 2;
- }
-
- if (AVR_MEGA)
- {
- fprintf (file, AS1 (jmp,__epilogue_restores__+%d) "\n",
- (18 - live_seq) * 2);
- epilogue_size += 2;
+ /* Get rid of frame. */
+ emit_move_insn(frame_pointer_rtx,
+ gen_rtx_PLUS (HImode, frame_pointer_rtx,
+ gen_int_mode (size, HImode)));
}
else
{
- fprintf (file, AS1 (rjmp,__epilogue_restores__+%d) "\n",
- (18 - live_seq) * 2);
- ++epilogue_size;
+ emit_move_insn (frame_pointer_rtx, stack_pointer_rtx);
}
+
+ emit_insn (gen_epilogue_restores (gen_int_mode (live_seq, HImode)));
}
else
{
- HARD_REG_SET set;
-
if (frame_pointer_needed)
{
if (size)
{
- fputs ("\t", file);
- epilogue_size += out_adj_frame_ptr (file, -size);
+ /* Try two methods to adjust stack and select shortest. */
+ rtx myfp;
+ rtx fp_plus_insns;
+ rtx sp_plus_insns = NULL_RTX;
+
+ if (TARGET_TINY_STACK)
+ {
+ /* The high byte (r29) doesn't change - prefer 'subi'
+ (1 cycle) over 'sbiw' (2 cycles, same size). */
+ myfp = gen_rtx_REG (QImode, REGNO (frame_pointer_rtx));
+ }
+ else
+ {
+ /* Normal sized addition. */
+ myfp = frame_pointer_rtx;
+ }
+
+ /* Method 1-Adjust frame pointer. */
+ start_sequence ();
- if (interrupt_func_p || signal_func_p)
+ emit_move_insn (myfp,
+ gen_rtx_PLUS (HImode, myfp,
+ gen_int_mode (size,
+ GET_MODE(myfp))));
+
+ /* Copy to stack pointer. */
+ if (TARGET_TINY_STACK)
+ {
+ emit_move_insn (stack_pointer_rtx, frame_pointer_rtx);
+ }
+ else if (TARGET_NO_INTERRUPTS
+ || cfun->machine->is_signal)
{
- epilogue_size += out_set_stack_ptr (file, -1, 0);
+ emit_insn (gen_movhi_sp_r_irq_off (stack_pointer_rtx,
+ frame_pointer_rtx));
+ }
+ else if (cfun->machine->is_interrupt)
+ {
+ emit_insn (gen_movhi_sp_r_irq_on (stack_pointer_rtx,
+ frame_pointer_rtx));
}
else
{
- epilogue_size += out_set_stack_ptr (file, -1, -1);
+ emit_move_insn (stack_pointer_rtx, frame_pointer_rtx);
}
- }
- fprintf (file, "\t"
- AS1 (pop,r29) CR_TAB
- AS1 (pop,r28) "\n");
- epilogue_size += 2;
- }
- epilogue_size += avr_regs_to_save (&set);
- for (reg = 31; reg >= 0; --reg)
- {
- if (TEST_HARD_REG_BIT (set, reg))
+ fp_plus_insns = get_insns ();
+ end_sequence ();
+
+ /* Method 2-Adjust Stack pointer. */
+ if (size <= 5)
+ {
+ start_sequence ();
+
+ emit_move_insn (stack_pointer_rtx,
+ gen_rtx_PLUS (HImode, stack_pointer_rtx,
+ gen_int_mode (size,
+ HImode)));
+
+ sp_plus_insns = get_insns ();
+ end_sequence ();
+ }
+
+ /* Use shortest method. */
+ if (size <= 5 && (get_sequence_length (sp_plus_insns)
+ < get_sequence_length (fp_plus_insns)))
+ emit_insn (sp_plus_insns);
+ else
+ emit_insn (fp_plus_insns);
+ }
+ if (!(cfun->machine->is_OS_task || cfun->machine->is_OS_main))
{
- fprintf (file, "\t" AS1 (pop,%s) "\n", avr_regnames[reg]);
+ /* Restore previous frame_pointer. */
+ emit_insn (gen_pophi (frame_pointer_rtx));
}
}
+ /* Restore used registers. */
+ for (reg = 31; reg >= 0; --reg)
+ {
+ if (TEST_HARD_REG_BIT (set, reg))
+ emit_insn (gen_popqi (gen_rtx_REG (QImode, reg)));
+ }
+ if (cfun->machine->is_interrupt || cfun->machine->is_signal)
+ {
+ /* Restore RAMPZ using tmp reg as scratch. */
+ if(AVR_HAVE_RAMPZ
+ && (TEST_HARD_REG_BIT (set, REG_Z) && TEST_HARD_REG_BIT (set, REG_Z + 1)))
+ {
+ emit_insn (gen_popqi (tmp_reg_rtx));
+ emit_move_insn (gen_rtx_MEM(QImode, GEN_INT(RAMPZ_ADDR)),
+ tmp_reg_rtx);
+ }
- if (interrupt_func_p || signal_func_p)
- {
- fprintf (file, "\t"
- AS1 (pop,__tmp_reg__) CR_TAB
- AS2 (out,__SREG__,__tmp_reg__) CR_TAB
- AS1 (pop,__tmp_reg__) CR_TAB
- AS1 (pop,__zero_reg__) "\n");
- epilogue_size += 4;
- fprintf (file, "\treti\n");
- }
- else
- fprintf (file, "\tret\n");
- ++epilogue_size;
- }
+ /* Restore SREG using tmp reg as scratch. */
+ emit_insn (gen_popqi (tmp_reg_rtx));
+
+ emit_move_insn (gen_rtx_MEM(QImode, GEN_INT(SREG_ADDR)),
+ tmp_reg_rtx);
+
+ /* Restore tmp REG. */
+ emit_insn (gen_popqi (tmp_reg_rtx));
- out:
- fprintf (file, "/* epilogue end (size=%d) */\n", epilogue_size);
- fprintf (file, "/* function %s size %d (%d) */\n", current_function_name (),
- prologue_size + function_size + epilogue_size, function_size);
- commands_in_file += prologue_size + function_size + epilogue_size;
- commands_in_prologues += prologue_size;
- commands_in_epilogues += epilogue_size;
+ /* Restore zero REG. */
+ emit_insn (gen_popqi (zero_reg_rtx));
+ }
+
+ emit_jump_insn (gen_return ());
+ }
}
+/* Output summary messages at beginning of function epilogue. */
+
+static void
+avr_asm_function_begin_epilogue (FILE *file)
+{
+ fprintf (file, "/* epilogue start */\n");
+}
/* Return nonzero if X (an RTX) is a legitimate memory address on the target
machine for a memory operand of mode MODE. */
true_regnum (XEXP (x, 0)));
debug_rtx (x);
}
+ if (!strict && GET_CODE (x) == SUBREG)
+ x = SUBREG_REG (x);
if (REG_P (x) && (strict ? REG_OK_FOR_BASE_STRICT_P (x)
: REG_OK_FOR_BASE_NOSTRICT_P (x)))
r = POINTER_REGS;
if (fit)
{
if (! strict
+ || REGNO (XEXP (x,0)) == REG_X
|| REGNO (XEXP (x,0)) == REG_Y
|| REGNO (XEXP (x,0)) == REG_Z)
r = BASE_POINTER_REGS;
}
if (TARGET_ALL_DEBUG)
{
- fprintf (stderr, " ret = %c\n", r);
+ fprintf (stderr, " ret = %c\n", r + '0');
}
return r == NO_REGS ? 0 : (int)r;
}
case REG_Y: return "Y";
case REG_Z: return "Z";
default:
- abort ();
+ output_operand_lossage ("address operand requires constraint for X, Y, or Z register");
}
return NULL;
}
case LTU:
return "lo";
default:
- abort ();
+ gcc_unreachable ();
}
}
&& ((GET_CODE (addr) == SYMBOL_REF && SYMBOL_REF_FUNCTION_P (addr))
|| GET_CODE (addr) == LABEL_REF))
{
- fprintf (file, "pm(");
+ fprintf (file, "gs(");
output_addr_const (file,addr);
fprintf (file ,")");
}
if (code == '~')
{
- if (!AVR_MEGA)
+ if (!AVR_HAVE_JMP_CALL)
fputc ('r', file);
}
+ else if (code == '!')
+ {
+ if (AVR_HAVE_EIJMP_EICALL)
+ fputc ('e', file);
+ }
else if (REG_P (x))
{
if (x == zero_reg_rtx)
print_operand (file, XEXP (addr, 1), 0);
}
+ else if (code == 'p' || code == 'r')
+ {
+ if (GET_CODE (addr) != POST_INC && GET_CODE (addr) != PRE_DEC)
+ fatal_insn ("bad address, not post_inc or pre_dec:", addr);
+
+ if (code == 'p')
+ print_operand_address (file, XEXP (addr, 0)); /* X, Y, Z */
+ else
+ print_operand (file, XEXP (addr, 0), 0); /* r26, r28, r30 */
+ }
else if (GET_CODE (addr) == PLUS)
{
print_operand_address (file, XEXP (addr,0));
print_operand_address (file, x);
}
-/* Recognize operand OP of mode MODE used in call instructions. */
-
-int
-call_insn_operand (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED)
-{
- if (GET_CODE (op) == MEM)
- {
- rtx inside = XEXP (op, 0);
- if (register_operand (inside, Pmode))
- return 1;
- if (CONSTANT_ADDRESS_P (inside))
- return 1;
- }
- return 0;
-}
-
/* Update the condition code in the INSN. */
void
rtx x = XEXP (src, 1);
if (GET_CODE (x) == CONST_INT
+ && INTVAL (x) > 0
&& INTVAL (x) != 6)
{
cc_status.value1 = SET_DEST (set);
class CLASS needed to hold a value of mode MODE. */
int
-class_max_nregs (enum reg_class class ATTRIBUTE_UNUSED,enum machine_mode mode)
+class_max_nregs (enum reg_class rclass ATTRIBUTE_UNUSED,enum machine_mode mode)
{
return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD);
}
return 1;
else if (-2046 <= jump_distance && jump_distance <= 2045)
return 2;
- else if (AVR_MEGA)
+ else if (AVR_HAVE_JMP_CALL)
return 3;
return 2;
fprintf (asm_out_file, "/*DEBUG: 0x%x\t\t%d\t%d */\n",
INSN_ADDRESSES (uid),
INSN_ADDRESSES (uid) - last_insn_address,
- rtx_cost (PATTERN (insn), INSN));
+ rtx_cost (PATTERN (insn), INSN, !optimize_size));
}
last_insn_address = INSN_ADDRESSES (uid);
}
/* Return 0 if undefined, 1 if always true or always false. */
int
-avr_simplify_comparison_p (enum machine_mode mode, RTX_CODE operator, rtx x)
+avr_simplify_comparison_p (enum machine_mode mode, RTX_CODE op, rtx x)
{
unsigned int max = (mode == QImode ? 0xff :
mode == HImode ? 0xffff :
mode == SImode ? 0xffffffff : 0);
- if (max && operator && GET_CODE (x) == CONST_INT)
+ if (max && op && GET_CODE (x) == CONST_INT)
{
- if (unsigned_condition (operator) != operator)
+ if (unsigned_condition (op) != op)
max >>= 1;
if (max != (INTVAL (x) & max)
}
else if (GET_CODE (dest) == MEM)
{
- const char *template;
+ const char *templ;
if (src == const0_rtx)
operands[1] = zero_reg_rtx;
- template = out_movqi_mr_r (insn, operands, real_l);
+ templ = out_movqi_mr_r (insn, operands, real_l);
if (!real_l)
- output_asm_insn (template, operands);
+ output_asm_insn (templ, operands);
operands[1] = src;
}
if (test_hard_reg_class (STACK_REG, dest))
{
if (TARGET_TINY_STACK)
- {
- *l = 1;
- return AS2 (out,__SP_L__,%A1);
- }
+ return *l = 1, AS2 (out,__SP_L__,%A1);
+ /* Use simple load of stack pointer if no interrupts are
+ used. */
else if (TARGET_NO_INTERRUPTS)
- {
- *l = 2;
- return (AS2 (out,__SP_H__,%B1) CR_TAB
- AS2 (out,__SP_L__,%A1));
- }
-
+ return *l = 2, (AS2 (out,__SP_H__,%B1) CR_TAB
+ AS2 (out,__SP_L__,%A1));
*l = 5;
return (AS2 (in,__tmp_reg__,__SREG__) CR_TAB
"cli" CR_TAB
AS2 (in,%B0,__SP_H__));
}
- if (AVR_ENHANCED)
+ if (AVR_HAVE_MOVW)
{
*l = 1;
return (AS2 (movw,%0,%1));
}
-
- if (true_regnum (dest) > true_regnum (src))
- {
- *l = 2;
- return (AS2 (mov,%B0,%B1) CR_TAB
- AS2 (mov,%A0,%A1));
- }
else
{
*l = 2;
}
else if (GET_CODE (dest) == MEM)
{
- const char *template;
+ const char *templ;
if (src == const0_rtx)
operands[1] = zero_reg_rtx;
- template = out_movhi_mr_r (insn, operands, real_l);
+ templ = out_movhi_mr_r (insn, operands, real_l);
if (!real_l)
- output_asm_insn (template, operands);
+ output_asm_insn (templ, operands);
operands[1] = src;
return "";
if (CONSTANT_ADDRESS_P (x))
{
- if (avr_io_address_p (x, 1))
+ if (CONST_INT_P (x) && INTVAL (x) == SREG_ADDR)
+ {
+ *l = 1;
+ return AS2 (in,%0,__SREG__);
+ }
+ if (optimize > 0 && io_address_operand (x, QImode))
{
*l = 1;
return AS2 (in,%0,%1-0x20);
rtx base = XEXP (src, 0);
int reg_dest = true_regnum (dest);
int reg_base = true_regnum (base);
+ /* "volatile" forces reading low byte first, even if less efficient,
+ for correct operation with 16-bit I/O registers. */
+ int mem_volatile_p = MEM_VOLATILE_P (src);
int tmp;
if (!l)
if (reg_overlap_mentioned_p (dest, XEXP (base, 0)))
fatal_insn ("incorrect insn:", insn);
+ if (mem_volatile_p)
+ {
+ if (REGNO (XEXP (base, 0)) == REG_X)
+ {
+ *l = 4;
+ return (AS2 (sbiw,r26,2) CR_TAB
+ AS2 (ld,%A0,X+) CR_TAB
+ AS2 (ld,%B0,X) CR_TAB
+ AS2 (sbiw,r26,1));
+ }
+ else
+ {
+ *l = 3;
+ return (AS2 (sbiw,%r1,2) CR_TAB
+ AS2 (ld,%A0,%p1) CR_TAB
+ AS2 (ldd,%B0,%p1+1));
+ }
+ }
+
*l = 2;
return (AS2 (ld,%B0,%1) CR_TAB
AS2 (ld,%A0,%1));
}
else if (CONSTANT_ADDRESS_P (base))
{
- if (avr_io_address_p (base, 2))
+ if (optimize > 0 && io_address_operand (base, HImode))
{
*l = 2;
return (AS2 (in,%A0,%A1-0x20) CR_TAB
{
if (true_regnum (dest) > true_regnum (src))
{
- if (AVR_ENHANCED)
+ if (AVR_HAVE_MOVW)
{
*l = 2;
return (AS2 (movw,%C0,%C1) CR_TAB
}
else
{
- if (AVR_ENHANCED)
+ if (AVR_HAVE_MOVW)
{
*l = 2;
return (AS2 (movw,%A0,%A1) CR_TAB
if (GET_CODE (src) == CONST_INT)
{
const char *const clr_op0 =
- AVR_ENHANCED ? (AS1 (clr,%A0) CR_TAB
+ AVR_HAVE_MOVW ? (AS1 (clr,%A0) CR_TAB
AS1 (clr,%B0) CR_TAB
AS2 (movw,%C0,%A0))
: (AS1 (clr,%A0) CR_TAB
if (src == const0_rtx) /* mov r,L */
{
- *l = AVR_ENHANCED ? 3 : 4;
+ *l = AVR_HAVE_MOVW ? 3 : 4;
return clr_op0;
}
else if (src == const1_rtx)
{
if (!real_l)
output_asm_insn (clr_op0, operands);
- *l = AVR_ENHANCED ? 4 : 5;
+ *l = AVR_HAVE_MOVW ? 4 : 5;
return AS1 (inc,%A0);
}
else if (src == constm1_rtx)
{
/* Immediate constants -1 to any register */
- if (AVR_ENHANCED)
+ if (AVR_HAVE_MOVW)
{
*l = 4;
return (AS1 (clr,%A0) CR_TAB
if (bit_nr >= 0)
{
- *l = AVR_ENHANCED ? 5 : 6;
+ *l = AVR_HAVE_MOVW ? 5 : 6;
if (!real_l)
{
output_asm_insn (clr_op0, operands);
}
else if (GET_CODE (dest) == MEM)
{
- const char *template;
+ const char *templ;
if (src == const0_rtx)
operands[1] = zero_reg_rtx;
- template = out_movsi_mr_r (insn, operands, real_l);
+ templ = out_movsi_mr_r (insn, operands, real_l);
if (!real_l)
- output_asm_insn (template, operands);
+ output_asm_insn (templ, operands);
operands[1] = src;
return "";
if (CONSTANT_ADDRESS_P (x))
{
- if (avr_io_address_p (x, 1))
+ if (CONST_INT_P (x) && INTVAL (x) == SREG_ADDR)
+ {
+ *l = 1;
+ return AS2 (out,__SREG__,%1);
+ }
+ if (optimize > 0 && io_address_operand (x, QImode))
{
*l = 1;
return AS2 (out,%0-0x20,%1);
rtx base = XEXP (dest, 0);
int reg_base = true_regnum (base);
int reg_src = true_regnum (src);
+ /* "volatile" forces writing high byte first, even if less efficient,
+ for correct operation with 16-bit I/O registers. */
+ int mem_volatile_p = MEM_VOLATILE_P (dest);
int tmp;
+
if (!l)
l = &tmp;
if (CONSTANT_ADDRESS_P (base))
{
- if (avr_io_address_p (base, 2))
+ if (optimize > 0 && io_address_operand (base, HImode))
{
*l = 2;
return (AS2 (out,%B0-0x20,%B1) CR_TAB
{
if (reg_src == REG_X)
{
- /* "st X+,r26" is undefined */
- if (reg_unused_after (insn, src))
+ /* "st X+,r26" and "st -X,r26" are undefined. */
+ if (!mem_volatile_p && reg_unused_after (insn, src))
return *l=4, (AS2 (mov,__tmp_reg__,r27) CR_TAB
AS2 (st,X,r26) CR_TAB
AS2 (adiw,r26,1) CR_TAB
AS2 (st,X,__tmp_reg__));
else
return *l=5, (AS2 (mov,__tmp_reg__,r27) CR_TAB
- AS2 (st,X,r26) CR_TAB
AS2 (adiw,r26,1) CR_TAB
AS2 (st,X,__tmp_reg__) CR_TAB
- AS2 (sbiw,r26,1));
+ AS2 (sbiw,r26,1) CR_TAB
+ AS2 (st,X,r26));
}
else
{
- if (reg_unused_after (insn, base))
+ if (!mem_volatile_p && reg_unused_after (insn, base))
return *l=2, (AS2 (st,X+,%A1) CR_TAB
AS2 (st,X,%B1));
else
- return *l=3, (AS2 (st ,X+,%A1) CR_TAB
- AS2 (st ,X,%B1) CR_TAB
- AS2 (sbiw,r26,1));
+ return *l=3, (AS2 (adiw,r26,1) CR_TAB
+ AS2 (st,X,%B1) CR_TAB
+ AS2 (st,-X,%A1));
}
}
else
- return *l=2, (AS2 (st ,%0,%A1) CR_TAB
- AS2 (std,%0+1,%B1));
+ return *l=2, (AS2 (std,%0+1,%B1) CR_TAB
+ AS2 (st,%0,%A1));
}
else if (GET_CODE (base) == PLUS)
{
if (disp <= 63 + MAX_LD_OFFSET (GET_MODE (dest)))
return *l = 4, (AS2 (adiw,r28,%o0-62) CR_TAB
- AS2 (std,Y+62,%A1) CR_TAB
AS2 (std,Y+63,%B1) CR_TAB
+ AS2 (std,Y+62,%A1) CR_TAB
AS2 (sbiw,r28,%o0-62));
return *l = 6, (AS2 (subi,r28,lo8(-%o0)) CR_TAB
AS2 (sbci,r29,hi8(-%o0)) CR_TAB
- AS2 (st,Y,%A1) CR_TAB
AS2 (std,Y+1,%B1) CR_TAB
+ AS2 (st,Y,%A1) CR_TAB
AS2 (subi,r28,lo8(%o0)) CR_TAB
AS2 (sbci,r29,hi8(%o0)));
}
{
/* (X + d) = R */
if (reg_src == REG_X)
- {
+ {
*l = 7;
return (AS2 (mov,__tmp_reg__,r26) CR_TAB
AS2 (mov,__zero_reg__,r27) CR_TAB
- AS2 (adiw,r26,%o0) CR_TAB
- AS2 (st,X+,__tmp_reg__) CR_TAB
+ AS2 (adiw,r26,%o0+1) CR_TAB
AS2 (st,X,__zero_reg__) CR_TAB
+ AS2 (st,-X,__tmp_reg__) CR_TAB
AS1 (clr,__zero_reg__) CR_TAB
- AS2 (sbiw,r26,%o0+1));
+ AS2 (sbiw,r26,%o0));
}
*l = 4;
- return (AS2 (adiw,r26,%o0) CR_TAB
- AS2 (st,X+,%A1) CR_TAB
- AS2 (st,X,%B1) CR_TAB
- AS2 (sbiw,r26,%o0+1));
+ return (AS2 (adiw,r26,%o0+1) CR_TAB
+ AS2 (st,X,%B1) CR_TAB
+ AS2 (st,-X,%A1) CR_TAB
+ AS2 (sbiw,r26,%o0));
}
- return *l=2, (AS2 (std,%A0,%A1) CR_TAB
- AS2 (std,%B0,%B1));
+ return *l=2, (AS2 (std,%B0,%B1) CR_TAB
+ AS2 (std,%A0,%A1));
}
else if (GET_CODE (base) == PRE_DEC) /* (--R) */
return *l=2, (AS2 (st,%0,%B1) CR_TAB
AS2 (st,%0,%A1));
else if (GET_CODE (base) == POST_INC) /* (R++) */
- return *l=2, (AS2 (st,%0,%A1) CR_TAB
- AS2 (st,%0,%B1));
+ {
+ if (mem_volatile_p)
+ {
+ if (REGNO (XEXP (base, 0)) == REG_X)
+ {
+ *l = 4;
+ return (AS2 (adiw,r26,1) CR_TAB
+ AS2 (st,X,%B1) CR_TAB
+ AS2 (st,-X,%A1) CR_TAB
+ AS2 (adiw,r26,2));
+ }
+ else
+ {
+ *l = 3;
+ return (AS2 (std,%p0+1,%B1) CR_TAB
+ AS2 (st,%p0,%A1) CR_TAB
+ AS2 (adiw,%r0,2));
+ }
+ }
+
+ *l = 2;
+ return (AS2 (st,%0,%A1) CR_TAB
+ AS2 (st,%0,%B1));
+ }
fatal_insn ("unknown move insn:",insn);
return "";
}
int
frame_pointer_required_p (void)
{
- return (current_function_calls_alloca
- || current_function_args_info.nregs == 0
+ return (cfun->calls_alloca
+ || crtl->args.info.nregs == 0
|| get_frame_size () > 0);
}
carefully hand-optimized in ?sh??i3_out. */
void
-out_shift_with_cnt (const char *template, rtx insn, rtx operands[],
+out_shift_with_cnt (const char *templ, rtx insn, rtx operands[],
int *len, int t_len)
{
rtx op[10];
int count = INTVAL (operands[2]);
int max_len = 10; /* If larger than this, always use a loop. */
+ if (count <= 0)
+ {
+ if (len)
+ *len = 0;
+ return;
+ }
+
if (count < 8 && !scratch)
use_zero_reg = 1;
else
{
while (count-- > 0)
- output_asm_insn (template, op);
+ output_asm_insn (templ, op);
}
return;
else
{
strcat (str, "\n1:\t");
- strcat (str, template);
+ strcat (str, templ);
strcat (str, second_label ? "\n2:\t" : "\n\t");
strcat (str, use_zero_reg ? AS1 (lsr,%3) : AS1 (dec,%3));
strcat (str, CR_TAB);
switch (INTVAL (operands[2]))
{
default:
+ if (INTVAL (operands[2]) < 8)
+ break;
+
*len = 1;
return AS1 (clr,%0);
switch (INTVAL (operands[2]))
{
+ default:
+ if (INTVAL (operands[2]) < 16)
+ break;
+
+ *len = 2;
+ return (AS1 (clr,%B0) CR_TAB
+ AS1 (clr,%A0));
+
case 4:
if (optimize_size && scratch)
break; /* 5 */
AS1 (ror,%A0));
case 8:
- if (true_regnum (operands[0]) + 1 == true_regnum (operands[1]))
- return *len = 1, AS1 (clr,%A0);
- else
- return *len = 2, (AS2 (mov,%B0,%A1) CR_TAB
- AS1 (clr,%A0));
+ return *len = 2, (AS2 (mov,%B0,%A1) CR_TAB
+ AS1 (clr,%A0));
case 9:
*len = 3;
AS1 (lsl,%B0) CR_TAB
AS2 (andi,%B0,0xe0));
}
- if (AVR_ENHANCED && scratch)
+ if (AVR_HAVE_MUL && scratch)
{
*len = 5;
return (AS2 (ldi,%3,0x20) CR_TAB
AS2 (ldi,%3,0xe0) CR_TAB
AS2 (and,%B0,%3));
}
- if (AVR_ENHANCED)
+ if (AVR_HAVE_MUL)
{
*len = 6;
return ("set" CR_TAB
AS1 (lsl,%B0));
case 14:
- if (AVR_ENHANCED && ldi_ok)
+ if (AVR_HAVE_MUL && ldi_ok)
{
*len = 5;
return (AS2 (ldi,%B0,0x40) CR_TAB
AS1 (clr,%A0) CR_TAB
AS1 (clr,__zero_reg__));
}
- if (AVR_ENHANCED && scratch)
+ if (AVR_HAVE_MUL && scratch)
{
*len = 5;
return (AS2 (ldi,%3,0x40) CR_TAB
switch (INTVAL (operands[2]))
{
+ default:
+ if (INTVAL (operands[2]) < 32)
+ break;
+
+ if (AVR_HAVE_MOVW)
+ return *len = 3, (AS1 (clr,%D0) CR_TAB
+ AS1 (clr,%C0) CR_TAB
+ AS2 (movw,%A0,%C0));
+ *len = 4;
+ return (AS1 (clr,%D0) CR_TAB
+ AS1 (clr,%C0) CR_TAB
+ AS1 (clr,%B0) CR_TAB
+ AS1 (clr,%A0));
+
case 8:
{
int reg0 = true_regnum (operands[0]);
AS2 (mov,%C0,%B1) CR_TAB
AS2 (mov,%B0,%A1) CR_TAB
AS1 (clr,%A0));
- else if (reg0 + 1 == reg1)
- {
- *len = 1;
- return AS1 (clr,%A0);
- }
else
return (AS1 (clr,%A0) CR_TAB
AS2 (mov,%B0,%A1) CR_TAB
{
int reg0 = true_regnum (operands[0]);
int reg1 = true_regnum (operands[1]);
- *len = 4;
- if (AVR_ENHANCED && (reg0 + 2 != reg1))
- {
- *len = 3;
- return (AS2 (movw,%C0,%A1) CR_TAB
- AS1 (clr,%B0) CR_TAB
- AS1 (clr,%A0));
- }
- if (reg0 + 1 >= reg1)
- return (AS2 (mov,%D0,%B1) CR_TAB
- AS2 (mov,%C0,%A1) CR_TAB
- AS1 (clr,%B0) CR_TAB
- AS1 (clr,%A0));
if (reg0 + 2 == reg1)
- {
- *len = 2;
- return (AS1 (clr,%B0) CR_TAB
- AS1 (clr,%A0));
- }
+ return *len = 2, (AS1 (clr,%B0) CR_TAB
+ AS1 (clr,%A0));
+ if (AVR_HAVE_MOVW)
+ return *len = 3, (AS2 (movw,%C0,%A1) CR_TAB
+ AS1 (clr,%B0) CR_TAB
+ AS1 (clr,%A0));
else
- return (AS2 (mov,%C0,%A1) CR_TAB
- AS2 (mov,%D0,%B1) CR_TAB
- AS1 (clr,%B0) CR_TAB
- AS1 (clr,%A0));
+ return *len = 4, (AS2 (mov,%C0,%A1) CR_TAB
+ AS2 (mov,%D0,%B1) CR_TAB
+ AS1 (clr,%B0) CR_TAB
+ AS1 (clr,%A0));
}
case 24:
*len = 4;
- if (true_regnum (operands[0]) + 3 != true_regnum (operands[1]))
- return (AS2 (mov,%D0,%A1) CR_TAB
- AS1 (clr,%C0) CR_TAB
- AS1 (clr,%B0) CR_TAB
- AS1 (clr,%A0));
- else
- {
- *len = 3;
- return (AS1 (clr,%C0) CR_TAB
- AS1 (clr,%B0) CR_TAB
- AS1 (clr,%A0));
- }
+ return (AS2 (mov,%D0,%A1) CR_TAB
+ AS1 (clr,%C0) CR_TAB
+ AS1 (clr,%B0) CR_TAB
+ AS1 (clr,%A0));
case 31:
*len = 6;
AS2 (bld,%0,0));
default:
+ if (INTVAL (operands[2]) < 8)
+ break;
+
+ /* fall through */
+
case 7:
*len = 2;
return (AS1 (lsl,%0) CR_TAB
return *len = 3, (AS2 (mov,%A0,%B0) CR_TAB
AS1 (lsl,%B0) CR_TAB
AS2 (sbc,%B0,%B0));
- else if (reg0 == reg1 + 1)
- return *len = 3, (AS1 (clr,%B0) CR_TAB
- AS2 (sbrc,%A0,7) CR_TAB
- AS1 (dec,%B0));
-
- return *len = 4, (AS2 (mov,%A0,%B1) CR_TAB
- AS1 (clr,%B0) CR_TAB
- AS2 (sbrc,%A0,7) CR_TAB
- AS1 (dec,%B0));
+ else
+ return *len = 4, (AS2 (mov,%A0,%B1) CR_TAB
+ AS1 (clr,%B0) CR_TAB
+ AS2 (sbrc,%A0,7) CR_TAB
+ AS1 (dec,%B0));
}
case 9:
AS1 (asr,%A0));
case 11:
- if (AVR_ENHANCED && ldi_ok)
+ if (AVR_HAVE_MUL && ldi_ok)
{
*len = 5;
return (AS2 (ldi,%A0,0x20) CR_TAB
AS1 (asr,%A0));
case 12:
- if (AVR_ENHANCED && ldi_ok)
+ if (AVR_HAVE_MUL && ldi_ok)
{
*len = 5;
return (AS2 (ldi,%A0,0x10) CR_TAB
AS1 (asr,%A0));
case 13:
- if (AVR_ENHANCED && ldi_ok)
+ if (AVR_HAVE_MUL && ldi_ok)
{
*len = 5;
return (AS2 (ldi,%A0,0x08) CR_TAB
AS2 (mov,%B0,%A0) CR_TAB
AS1 (rol,%A0));
+ default:
+ if (INTVAL (operands[2]) < 16)
+ break;
+
+ /* fall through */
+
case 15:
return *len = 3, (AS1 (lsl,%B0) CR_TAB
AS2 (sbc,%A0,%A0) CR_TAB
AS1 (clr,%D0) CR_TAB
AS2 (sbrc,%C0,7) CR_TAB
AS1 (dec,%D0));
- else if (reg0 == reg1 + 1)
- {
- *len = 3;
- return (AS1 (clr,%D0) CR_TAB
- AS2 (sbrc,%C0,7) CR_TAB
- AS1 (dec,%D0));
- }
else
return (AS1 (clr,%D0) CR_TAB
AS2 (sbrc,%D1,7) CR_TAB
{
int reg0 = true_regnum (operands[0]);
int reg1 = true_regnum (operands[1]);
- *len=6;
- if (AVR_ENHANCED && (reg0 != reg1 + 2))
- {
- *len = 5;
- return (AS2 (movw,%A0,%C1) CR_TAB
- AS1 (clr,%D0) CR_TAB
- AS2 (sbrc,%B0,7) CR_TAB
- AS1 (com,%D0) CR_TAB
- AS2 (mov,%C0,%D0));
- }
- if (reg0 <= reg1 + 1)
- return (AS2 (mov,%A0,%C1) CR_TAB
- AS2 (mov,%B0,%D1) CR_TAB
- AS1 (clr,%D0) CR_TAB
- AS2 (sbrc,%B0,7) CR_TAB
- AS1 (com,%D0) CR_TAB
- AS2 (mov,%C0,%D0));
- else if (reg0 == reg1 + 2)
+
+ if (reg0 == reg1 + 2)
return *len = 4, (AS1 (clr,%D0) CR_TAB
AS2 (sbrc,%B0,7) CR_TAB
AS1 (com,%D0) CR_TAB
AS2 (mov,%C0,%D0));
- else
- return (AS2 (mov,%B0,%D1) CR_TAB
- AS2 (mov,%A0,%C1) CR_TAB
- AS1 (clr,%D0) CR_TAB
- AS2 (sbrc,%B0,7) CR_TAB
- AS1 (com,%D0) CR_TAB
- AS2 (mov,%C0,%D0));
+ if (AVR_HAVE_MOVW)
+ return *len = 5, (AS2 (movw,%A0,%C1) CR_TAB
+ AS1 (clr,%D0) CR_TAB
+ AS2 (sbrc,%B0,7) CR_TAB
+ AS1 (com,%D0) CR_TAB
+ AS2 (mov,%C0,%D0));
+ else
+ return *len = 6, (AS2 (mov,%B0,%D1) CR_TAB
+ AS2 (mov,%A0,%C1) CR_TAB
+ AS1 (clr,%D0) CR_TAB
+ AS2 (sbrc,%B0,7) CR_TAB
+ AS1 (com,%D0) CR_TAB
+ AS2 (mov,%C0,%D0));
}
case 24:
- if (true_regnum (operands[0]) != true_regnum (operands[1]) + 3)
- return *len = 6, (AS2 (mov,%A0,%D1) CR_TAB
- AS1 (clr,%D0) CR_TAB
- AS2 (sbrc,%A0,7) CR_TAB
- AS1 (com,%D0) CR_TAB
- AS2 (mov,%B0,%D0) CR_TAB
- AS2 (mov,%C0,%D0));
- else
- return *len = 5, (AS1 (clr,%D0) CR_TAB
- AS2 (sbrc,%A0,7) CR_TAB
- AS1 (com,%D0) CR_TAB
- AS2 (mov,%B0,%D0) CR_TAB
- AS2 (mov,%C0,%D0));
+ return *len = 6, (AS2 (mov,%A0,%D1) CR_TAB
+ AS1 (clr,%D0) CR_TAB
+ AS2 (sbrc,%A0,7) CR_TAB
+ AS1 (com,%D0) CR_TAB
+ AS2 (mov,%B0,%D0) CR_TAB
+ AS2 (mov,%C0,%D0));
+
+ default:
+ if (INTVAL (operands[2]) < 32)
+ break;
+
+ /* fall through */
case 31:
- if (AVR_ENHANCED)
+ if (AVR_HAVE_MOVW)
return *len = 4, (AS1 (lsl,%D0) CR_TAB
AS2 (sbc,%A0,%A0) CR_TAB
AS2 (mov,%B0,%A0) CR_TAB
switch (INTVAL (operands[2]))
{
default:
+ if (INTVAL (operands[2]) < 8)
+ break;
+
*len = 1;
return AS1 (clr,%0);
switch (INTVAL (operands[2]))
{
+ default:
+ if (INTVAL (operands[2]) < 16)
+ break;
+
+ *len = 2;
+ return (AS1 (clr,%B0) CR_TAB
+ AS1 (clr,%A0));
+
case 4:
if (optimize_size && scratch)
break; /* 5 */
AS1 (neg,%B0));
case 8:
- if (true_regnum (operands[0]) != true_regnum (operands[1]) + 1)
- return *len = 2, (AS2 (mov,%A0,%B1) CR_TAB
- AS1 (clr,%B0));
- else
- return *len = 1, AS1 (clr,%B0);
+ return *len = 2, (AS2 (mov,%A0,%B1) CR_TAB
+ AS1 (clr,%B0));
case 9:
*len = 3;
AS1 (lsr,%A0) CR_TAB
AS2 (andi,%A0,0x07));
}
- if (AVR_ENHANCED && scratch)
+ if (AVR_HAVE_MUL && scratch)
{
*len = 5;
return (AS2 (ldi,%3,0x08) CR_TAB
AS2 (ldi,%3,0x07) CR_TAB
AS2 (and,%A0,%3));
}
- if (AVR_ENHANCED)
+ if (AVR_HAVE_MUL)
{
*len = 6;
return ("set" CR_TAB
AS1 (lsr,%A0));
case 14:
- if (AVR_ENHANCED && ldi_ok)
+ if (AVR_HAVE_MUL && ldi_ok)
{
*len = 5;
return (AS2 (ldi,%A0,0x04) CR_TAB
AS1 (clr,%B0) CR_TAB
AS1 (clr,__zero_reg__));
}
- if (AVR_ENHANCED && scratch)
+ if (AVR_HAVE_MUL && scratch)
{
*len = 5;
return (AS2 (ldi,%3,0x04) CR_TAB
switch (INTVAL (operands[2]))
{
+ default:
+ if (INTVAL (operands[2]) < 32)
+ break;
+
+ if (AVR_HAVE_MOVW)
+ return *len = 3, (AS1 (clr,%D0) CR_TAB
+ AS1 (clr,%C0) CR_TAB
+ AS2 (movw,%A0,%C0));
+ *len = 4;
+ return (AS1 (clr,%D0) CR_TAB
+ AS1 (clr,%C0) CR_TAB
+ AS1 (clr,%B0) CR_TAB
+ AS1 (clr,%A0));
+
case 8:
{
int reg0 = true_regnum (operands[0]);
AS2 (mov,%B0,%C1) CR_TAB
AS2 (mov,%C0,%D1) CR_TAB
AS1 (clr,%D0));
- else if (reg0 == reg1 + 1)
- return *len = 1, AS1 (clr,%D0);
else
return (AS1 (clr,%D0) CR_TAB
AS2 (mov,%C0,%D1) CR_TAB
{
int reg0 = true_regnum (operands[0]);
int reg1 = true_regnum (operands[1]);
- *len = 4;
- if (AVR_ENHANCED && (reg0 != reg1 + 2))
- {
- *len = 3;
- return (AS2 (movw,%A0,%C1) CR_TAB
- AS1 (clr,%C0) CR_TAB
- AS1 (clr,%D0));
- }
- if (reg0 <= reg1 + 1)
- return (AS2 (mov,%A0,%C1) CR_TAB
- AS2 (mov,%B0,%D1) CR_TAB
- AS1 (clr,%C0) CR_TAB
- AS1 (clr,%D0));
- else if (reg0 == reg1 + 2)
+
+ if (reg0 == reg1 + 2)
return *len = 2, (AS1 (clr,%C0) CR_TAB
AS1 (clr,%D0));
+ if (AVR_HAVE_MOVW)
+ return *len = 3, (AS2 (movw,%A0,%C1) CR_TAB
+ AS1 (clr,%C0) CR_TAB
+ AS1 (clr,%D0));
else
- return (AS2 (mov,%B0,%D1) CR_TAB
- AS2 (mov,%A0,%C1) CR_TAB
- AS1 (clr,%C0) CR_TAB
- AS1 (clr,%D0));
+ return *len = 4, (AS2 (mov,%B0,%D1) CR_TAB
+ AS2 (mov,%A0,%C1) CR_TAB
+ AS1 (clr,%C0) CR_TAB
+ AS1 (clr,%D0));
}
case 24:
- if (true_regnum (operands[0]) != true_regnum (operands[1]) + 3)
- return *len = 4, (AS2 (mov,%A0,%D1) CR_TAB
- AS1 (clr,%B0) CR_TAB
- AS1 (clr,%C0) CR_TAB
- AS1 (clr,%D0));
- else
- return *len = 3, (AS1 (clr,%B0) CR_TAB
- AS1 (clr,%C0) CR_TAB
- AS1 (clr,%D0));
+ return *len = 4, (AS2 (mov,%A0,%D1) CR_TAB
+ AS1 (clr,%B0) CR_TAB
+ AS1 (clr,%C0) CR_TAB
+ AS1 (clr,%D0));
case 31:
*len = 6;
&& ((GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_FUNCTION_P (x))
|| GET_CODE (x) == LABEL_REF))
{
- fputs ("\t.word\tpm(", asm_out_file);
+ fputs ("\t.word\tgs(", asm_out_file);
output_addr_const (asm_out_file, x);
fputs (")\n", asm_out_file);
return true;
void
gas_output_limited_string(FILE *file, const char *str)
{
- const unsigned char *_limited_str = (unsigned char *) str;
+ const unsigned char *_limited_str = (const unsigned char *) str;
unsigned ch;
fprintf (file, "%s\"", STRING_ASM_OP);
for (; (ch = *_limited_str); _limited_str++)
fprintf (file, "\"\n");
bytes_in_chunk = 0;
}
- gas_output_limited_string (file, (char*)_ascii_bytes);
+ gas_output_limited_string (file, (const char*)_ascii_bytes);
_ascii_bytes = p;
}
else
{ "progmem", 0, 0, false, false, false, avr_handle_progmem_attribute },
{ "signal", 0, 0, true, false, false, avr_handle_fndecl_attribute },
{ "interrupt", 0, 0, true, false, false, avr_handle_fndecl_attribute },
- { "naked", 0, 0, true, false, false, avr_handle_fndecl_attribute },
+ { "naked", 0, 0, false, true, true, avr_handle_fntype_attribute },
+ { "OS_task", 0, 0, false, true, true, avr_handle_fntype_attribute },
+ { "OS_main", 0, 0, false, true, true, avr_handle_fntype_attribute },
{ NULL, 0, 0, false, false, false, NULL }
};
{
if (DECL_INITIAL (*node) == NULL_TREE && !DECL_EXTERNAL (*node))
{
- warning ("only initialized variables can be placed into "
+ warning (0, "only initialized variables can be placed into "
"program memory area");
*no_add_attrs = true;
}
}
else
{
- warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ warning (OPT_Wattributes, "%qs attribute ignored",
+ IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
}
{
if (TREE_CODE (*node) != FUNCTION_DECL)
{
- warning ("`%s' attribute only applies to functions",
+ warning (OPT_Wattributes, "%qs attribute only applies to functions",
+ IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+ else
+ {
+ const char *func_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (*node));
+ const char *attr = IDENTIFIER_POINTER (name);
+
+ /* If the function has the 'signal' or 'interrupt' attribute, test to
+ make sure that the name of the function is "__vector_NN" so as to
+ catch when the user misspells the interrupt vector name. */
+
+ if (strncmp (attr, "interrupt", strlen ("interrupt")) == 0)
+ {
+ if (strncmp (func_name, "__vector", strlen ("__vector")) != 0)
+ {
+ warning (0, "%qs appears to be a misspelled interrupt handler",
+ func_name);
+ }
+ }
+ else if (strncmp (attr, "signal", strlen ("signal")) == 0)
+ {
+ if (strncmp (func_name, "__vector", strlen ("__vector")) != 0)
+ {
+ warning (0, "%qs appears to be a misspelled signal handler",
+ func_name);
+ }
+ }
+ }
+
+ return NULL_TREE;
+}
+
+static tree
+avr_handle_fntype_attribute (tree *node, tree name,
+ tree args ATTRIBUTE_UNUSED,
+ int flags ATTRIBUTE_UNUSED,
+ bool *no_add_attrs)
+{
+ if (TREE_CODE (*node) != FUNCTION_TYPE)
+ {
+ warning (OPT_Wattributes, "%qs attribute only applies to functions",
IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
}
}
+/* A get_unnamed_section callback for switching to progmem_section. */
+
+static void
+avr_output_progmem_section_asm_op (const void *arg ATTRIBUTE_UNUSED)
+{
+ fprintf (asm_out_file,
+ "\t.section .progmem.gcc_sw_table, \"%s\", @progbits\n",
+ AVR_HAVE_JMP_CALL ? "a" : "ax");
+ /* Should already be aligned, this is just to be safe if it isn't. */
+ fprintf (asm_out_file, "\t.p2align 1\n");
+}
+
+/* Implement TARGET_ASM_INIT_SECTIONS. */
+
+static void
+avr_asm_init_sections (void)
+{
+ progmem_section = get_unnamed_section (AVR_HAVE_JMP_CALL ? 0 : SECTION_CODE,
+ avr_output_progmem_section_asm_op,
+ NULL);
+ readonly_data_section = data_section;
+}
+
static unsigned int
avr_section_type_flags (tree decl, const char *name, int reloc)
{
&& DECL_INITIAL (decl) == NULL_TREE)
flags |= SECTION_BSS; /* @nobits */
else
- warning ("only uninitialized variables can be placed in the "
+ warning (0, "only uninitialized variables can be placed in the "
".noinit section");
}
static void
avr_file_start (void)
{
- if (avr_asm_only_p)
- error ("MCU `%s' supported for assembler only", avr_mcu_name);
+ if (avr_current_arch->asm_only)
+ error ("MCU %qs supported for assembler only", avr_mcu_name);
default_file_start ();
- fprintf (asm_out_file, "\t.arch %s\n", avr_mcu_name);
+/* fprintf (asm_out_file, "\t.arch %s\n", avr_mcu_name);*/
fputs ("__SREG__ = 0x3f\n"
"__SP_H__ = 0x3e\n"
"__SP_L__ = 0x3d\n", asm_out_file);
initialization code from libgcc if one or both sections are empty. */
fputs ("\t.global __do_copy_data\n", asm_out_file);
fputs ("\t.global __do_clear_bss\n", asm_out_file);
-
- commands_in_file = 0;
- commands_in_prologues = 0;
- commands_in_epilogues = 0;
}
/* Outputs to the stdio stream FILE some
static void
avr_file_end (void)
{
- fputs ("/* File ", asm_out_file);
- output_quoted_string (asm_out_file, main_input_filename);
- fprintf (asm_out_file,
- ": code %4d = 0x%04x (%4d), prologues %3d, epilogues %3d */\n",
- commands_in_file,
- commands_in_file,
- commands_in_file - commands_in_prologues - commands_in_epilogues,
- commands_in_prologues, commands_in_epilogues);
}
/* Choose the order in which to allocate hard registers for
reg_alloc_order[i] = order[i];
}
-/* Calculate the cost of X code of the expression in which it is contained,
- found in OUTER_CODE */
+
+/* Mutually recursive subroutine of avr_rtx_cost for calculating the
+ cost of an RTX operand given its context. X is the rtx of the
+ operand, MODE is its mode, and OUTER is the rtx_code of this
+ operand's parent operator. */
static int
-default_rtx_costs (rtx X, enum rtx_code code, enum rtx_code outer_code)
+avr_operand_rtx_cost (rtx x, enum machine_mode mode, enum rtx_code outer,
+ bool speed)
{
- int cost=0;
+ enum rtx_code code = GET_CODE (x);
+ int total;
+
switch (code)
{
- case SYMBOL_REF:
- case LABEL_REF:
- cost = 2 * GET_MODE_SIZE (GET_MODE (X));
- break;
- case MEM:
- if (outer_code != SET)
- cost = 1;
- if (GET_CODE (XEXP (X,0)) == SYMBOL_REF)
- cost += 2 * GET_MODE_SIZE (GET_MODE (X));
- else
- cost += GET_MODE_SIZE (GET_MODE (X));
- break;
+ case REG:
+ case SUBREG:
+ return 0;
+
case CONST_INT:
- cost = 0;
- break;
- case SIGN_EXTEND:
- if (outer_code == SET)
- cost = GET_MODE_SIZE (GET_MODE (X));
- else
- cost = -GET_MODE_SIZE (GET_MODE (X));
- break;
- case ZERO_EXTEND:
- if (outer_code == SET)
- cost = GET_MODE_SIZE (GET_MODE (X));
- else
- cost = -1;
- break;
- case PLUS:
- case MINUS:
- if (outer_code == SET)
- {
- if (X == stack_pointer_rtx)
- cost = -10;
- else if (GET_CODE (XEXP (X,1)) == CONST_INT)
- cost = (INTVAL (XEXP (X,1)) <= 63 ? 1 :
- GET_MODE_SIZE (GET_MODE (X)));
- else
- cost = GET_MODE_SIZE (GET_MODE (X));
- }
- break;
- case COMPARE:
- if (GET_CODE (XEXP (X,1)) == CONST_INT)
- cost = GET_MODE_SIZE (GET_MODE (XEXP (X,0)));
- break;
+ case CONST_DOUBLE:
+ return COSTS_N_INSNS (GET_MODE_SIZE (mode));
+
default:
break;
}
- return cost;
+
+ total = 0;
+ avr_rtx_costs (x, code, outer, &total, speed);
+ return total;
}
+/* The AVR backend's rtx_cost function. X is rtx expression whose cost
+ is to be calculated. Return true if the complete cost has been
+ computed, and false if subexpressions should be scanned. In either
+ case, *TOTAL contains the cost result. */
+
static bool
-avr_rtx_costs (rtx x, int code, int outer_code, int *total)
+avr_rtx_costs (rtx x, int code, int outer_code ATTRIBUTE_UNUSED, int *total,
+ bool speed)
{
- int cst;
+ enum machine_mode mode = GET_MODE (x);
+ HOST_WIDE_INT val;
switch (code)
{
case CONST_INT:
- if (outer_code == PLUS
- || outer_code == IOR
- || outer_code == AND
- || outer_code == MINUS
- || outer_code == SET
- || INTVAL (x) == 0)
+ case CONST_DOUBLE:
+ /* Immediate constants are as cheap as registers. */
+ *total = 0;
+ return true;
+
+ case MEM:
+ case CONST:
+ case LABEL_REF:
+ case SYMBOL_REF:
+ *total = COSTS_N_INSNS (GET_MODE_SIZE (mode));
+ return true;
+
+ case NEG:
+ switch (mode)
{
- *total = 2;
- return true;
+ case QImode:
+ case SFmode:
+ *total = COSTS_N_INSNS (1);
+ break;
+
+ case HImode:
+ *total = COSTS_N_INSNS (3);
+ break;
+
+ case SImode:
+ *total = COSTS_N_INSNS (7);
+ break;
+
+ default:
+ return false;
}
- if (outer_code == COMPARE
- && INTVAL (x) >= 0
- && INTVAL (x) <= 255)
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ return true;
+
+ case ABS:
+ switch (mode)
{
- *total = 2;
- return true;
+ case QImode:
+ case SFmode:
+ *total = COSTS_N_INSNS (1);
+ break;
+
+ default:
+ return false;
}
- /* FALLTHRU */
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ return true;
- case CONST:
- case LABEL_REF:
- case SYMBOL_REF:
- case CONST_DOUBLE:
- *total = 4;
+ case NOT:
+ *total = COSTS_N_INSNS (GET_MODE_SIZE (mode));
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
return true;
- default:
- cst = default_rtx_costs (x, code, outer_code);
- if (cst > 0)
+ case ZERO_EXTEND:
+ *total = COSTS_N_INSNS (GET_MODE_SIZE (mode)
+ - GET_MODE_SIZE (GET_MODE (XEXP (x, 0))));
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ return true;
+
+ case SIGN_EXTEND:
+ *total = COSTS_N_INSNS (GET_MODE_SIZE (mode) + 2
+ - GET_MODE_SIZE (GET_MODE (XEXP (x, 0))));
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ return true;
+
+ case PLUS:
+ switch (mode)
+ {
+ case QImode:
+ *total = COSTS_N_INSNS (1);
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ break;
+
+ case HImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (2);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else if (INTVAL (XEXP (x, 1)) >= -63 && INTVAL (XEXP (x, 1)) <= 63)
+ *total = COSTS_N_INSNS (1);
+ else
+ *total = COSTS_N_INSNS (2);
+ break;
+
+ case SImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (4);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else if (INTVAL (XEXP (x, 1)) >= -63 && INTVAL (XEXP (x, 1)) <= 63)
+ *total = COSTS_N_INSNS (1);
+ else
+ *total = COSTS_N_INSNS (4);
+ break;
+
+ default:
+ return false;
+ }
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ return true;
+
+ case MINUS:
+ case AND:
+ case IOR:
+ *total = COSTS_N_INSNS (GET_MODE_SIZE (mode));
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ return true;
+
+ case XOR:
+ *total = COSTS_N_INSNS (GET_MODE_SIZE (mode));
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ return true;
+
+ case MULT:
+ switch (mode)
+ {
+ case QImode:
+ if (AVR_HAVE_MUL)
+ *total = COSTS_N_INSNS (!speed ? 3 : 4);
+ else if (!speed)
+ *total = COSTS_N_INSNS (AVR_HAVE_JMP_CALL ? 2 : 1);
+ else
+ return false;
+ break;
+
+ case HImode:
+ if (AVR_HAVE_MUL)
+ *total = COSTS_N_INSNS (!speed ? 7 : 10);
+ else if (!speed)
+ *total = COSTS_N_INSNS (AVR_HAVE_JMP_CALL ? 2 : 1);
+ else
+ return false;
+ break;
+
+ default:
+ return false;
+ }
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ return true;
+
+ case DIV:
+ case MOD:
+ case UDIV:
+ case UMOD:
+ if (!speed)
+ *total = COSTS_N_INSNS (AVR_HAVE_JMP_CALL ? 2 : 1);
+ else
+ return false;
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ return true;
+
+ case ROTATE:
+ switch (mode)
+ {
+ case QImode:
+ if (CONST_INT_P (XEXP (x, 1)) && INTVAL (XEXP (x, 1)) == 4)
+ *total = COSTS_N_INSNS (1);
+
+ break;
+
+ case HImode:
+ if (CONST_INT_P (XEXP (x, 1)) && INTVAL (XEXP (x, 1)) == 8)
+ *total = COSTS_N_INSNS (3);
+
+ break;
+
+ case SImode:
+ if (CONST_INT_P (XEXP (x, 1)))
+ switch (INTVAL (XEXP (x, 1)))
+ {
+ case 8:
+ case 24:
+ *total = COSTS_N_INSNS (5);
+ break;
+ case 16:
+ *total = COSTS_N_INSNS (AVR_HAVE_MOVW ? 4 : 6);
+ break;
+ }
+ break;
+
+ default:
+ return false;
+ }
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ return true;
+
+ case ASHIFT:
+ switch (mode)
{
- *total = cst;
- return true;
+ case QImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (!speed ? 4 : 17);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else
+ {
+ val = INTVAL (XEXP (x, 1));
+ if (val == 7)
+ *total = COSTS_N_INSNS (3);
+ else if (val >= 0 && val <= 7)
+ *total = COSTS_N_INSNS (val);
+ else
+ *total = COSTS_N_INSNS (1);
+ }
+ break;
+
+ case HImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (!speed ? 5 : 41);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else
+ switch (INTVAL (XEXP (x, 1)))
+ {
+ case 0:
+ *total = 0;
+ break;
+ case 1:
+ case 8:
+ *total = COSTS_N_INSNS (2);
+ break;
+ case 9:
+ *total = COSTS_N_INSNS (3);
+ break;
+ case 2:
+ case 3:
+ case 10:
+ case 15:
+ *total = COSTS_N_INSNS (4);
+ break;
+ case 7:
+ case 11:
+ case 12:
+ *total = COSTS_N_INSNS (5);
+ break;
+ case 4:
+ *total = COSTS_N_INSNS (!speed ? 5 : 8);
+ break;
+ case 6:
+ *total = COSTS_N_INSNS (!speed ? 5 : 9);
+ break;
+ case 5:
+ *total = COSTS_N_INSNS (!speed ? 5 : 10);
+ break;
+ default:
+ *total = COSTS_N_INSNS (!speed ? 5 : 41);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ break;
+
+ case SImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (!speed ? 7 : 113);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else
+ switch (INTVAL (XEXP (x, 1)))
+ {
+ case 0:
+ *total = 0;
+ break;
+ case 24:
+ *total = COSTS_N_INSNS (3);
+ break;
+ case 1:
+ case 8:
+ case 16:
+ *total = COSTS_N_INSNS (4);
+ break;
+ case 31:
+ *total = COSTS_N_INSNS (6);
+ break;
+ case 2:
+ *total = COSTS_N_INSNS (!speed ? 7 : 8);
+ break;
+ default:
+ *total = COSTS_N_INSNS (!speed ? 7 : 113);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ break;
+
+ default:
+ return false;
}
- else if (cst < 0)
- *total += -cst;
- return false;
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ return true;
+
+ case ASHIFTRT:
+ switch (mode)
+ {
+ case QImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (!speed ? 4 : 17);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else
+ {
+ val = INTVAL (XEXP (x, 1));
+ if (val == 6)
+ *total = COSTS_N_INSNS (4);
+ else if (val == 7)
+ *total = COSTS_N_INSNS (2);
+ else if (val >= 0 && val <= 7)
+ *total = COSTS_N_INSNS (val);
+ else
+ *total = COSTS_N_INSNS (1);
+ }
+ break;
+
+ case HImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (!speed ? 5 : 41);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else
+ switch (INTVAL (XEXP (x, 1)))
+ {
+ case 0:
+ *total = 0;
+ break;
+ case 1:
+ *total = COSTS_N_INSNS (2);
+ break;
+ case 15:
+ *total = COSTS_N_INSNS (3);
+ break;
+ case 2:
+ case 7:
+ case 8:
+ case 9:
+ *total = COSTS_N_INSNS (4);
+ break;
+ case 10:
+ case 14:
+ *total = COSTS_N_INSNS (5);
+ break;
+ case 11:
+ *total = COSTS_N_INSNS (!speed ? 5 : 6);
+ break;
+ case 12:
+ *total = COSTS_N_INSNS (!speed ? 5 : 7);
+ break;
+ case 6:
+ case 13:
+ *total = COSTS_N_INSNS (!speed ? 5 : 8);
+ break;
+ default:
+ *total = COSTS_N_INSNS (!speed ? 5 : 41);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ break;
+
+ case SImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (!speed ? 7 : 113);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else
+ switch (INTVAL (XEXP (x, 1)))
+ {
+ case 0:
+ *total = 0;
+ break;
+ case 1:
+ *total = COSTS_N_INSNS (4);
+ break;
+ case 8:
+ case 16:
+ case 24:
+ *total = COSTS_N_INSNS (6);
+ break;
+ case 2:
+ *total = COSTS_N_INSNS (!speed ? 7 : 8);
+ break;
+ case 31:
+ *total = COSTS_N_INSNS (AVR_HAVE_MOVW ? 4 : 5);
+ break;
+ default:
+ *total = COSTS_N_INSNS (!speed ? 7 : 113);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ break;
+
+ default:
+ return false;
+ }
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ return true;
+
+ case LSHIFTRT:
+ switch (mode)
+ {
+ case QImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (!speed ? 4 : 17);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else
+ {
+ val = INTVAL (XEXP (x, 1));
+ if (val == 7)
+ *total = COSTS_N_INSNS (3);
+ else if (val >= 0 && val <= 7)
+ *total = COSTS_N_INSNS (val);
+ else
+ *total = COSTS_N_INSNS (1);
+ }
+ break;
+
+ case HImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (!speed ? 5 : 41);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else
+ switch (INTVAL (XEXP (x, 1)))
+ {
+ case 0:
+ *total = 0;
+ break;
+ case 1:
+ case 8:
+ *total = COSTS_N_INSNS (2);
+ break;
+ case 9:
+ *total = COSTS_N_INSNS (3);
+ break;
+ case 2:
+ case 10:
+ case 15:
+ *total = COSTS_N_INSNS (4);
+ break;
+ case 7:
+ case 11:
+ *total = COSTS_N_INSNS (5);
+ break;
+ case 3:
+ case 12:
+ case 13:
+ case 14:
+ *total = COSTS_N_INSNS (!speed ? 5 : 6);
+ break;
+ case 4:
+ *total = COSTS_N_INSNS (!speed ? 5 : 7);
+ break;
+ case 5:
+ case 6:
+ *total = COSTS_N_INSNS (!speed ? 5 : 9);
+ break;
+ default:
+ *total = COSTS_N_INSNS (!speed ? 5 : 41);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ break;
+
+ case SImode:
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ {
+ *total = COSTS_N_INSNS (!speed ? 7 : 113);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ else
+ switch (INTVAL (XEXP (x, 1)))
+ {
+ case 0:
+ *total = 0;
+ break;
+ case 1:
+ *total = COSTS_N_INSNS (4);
+ break;
+ case 2:
+ *total = COSTS_N_INSNS (!speed ? 7 : 8);
+ break;
+ case 8:
+ case 16:
+ case 24:
+ *total = COSTS_N_INSNS (4);
+ break;
+ case 31:
+ *total = COSTS_N_INSNS (6);
+ break;
+ default:
+ *total = COSTS_N_INSNS (!speed ? 7 : 113);
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ }
+ break;
+
+ default:
+ return false;
+ }
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ return true;
+
+ case COMPARE:
+ switch (GET_MODE (XEXP (x, 0)))
+ {
+ case QImode:
+ *total = COSTS_N_INSNS (1);
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ break;
+
+ case HImode:
+ *total = COSTS_N_INSNS (2);
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ else if (INTVAL (XEXP (x, 1)) != 0)
+ *total += COSTS_N_INSNS (1);
+ break;
+
+ case SImode:
+ *total = COSTS_N_INSNS (4);
+ if (GET_CODE (XEXP (x, 1)) != CONST_INT)
+ *total += avr_operand_rtx_cost (XEXP (x, 1), mode, code, speed);
+ else if (INTVAL (XEXP (x, 1)) != 0)
+ *total += COSTS_N_INSNS (3);
+ break;
+
+ default:
+ return false;
+ }
+ *total += avr_operand_rtx_cost (XEXP (x, 0), mode, code, speed);
+ return true;
+
+ default:
+ break;
}
+ return false;
}
/* Calculate the cost of a memory address. */
static int
-avr_address_cost (rtx x)
+avr_address_cost (rtx x, bool speed ATTRIBUTE_UNUSED)
{
if (GET_CODE (x) == PLUS
&& GET_CODE (XEXP (x,1)) == CONST_INT
return 18;
if (CONSTANT_ADDRESS_P (x))
{
- if (avr_io_address_p (x, 1))
+ if (optimize > 0 && io_address_operand (x, QImode))
return 2;
return 4;
}
return 4;
}
-/* EXTRA_CONSTRAINT helper */
+/* Test for extra memory constraint 'Q'.
+ It's a memory address based on Y or Z pointer with valid displacement. */
int
-extra_constraint (rtx x, int c)
+extra_constraint_Q (rtx x)
{
- if (c == 'Q'
- && GET_CODE (x) == MEM
- && GET_CODE (XEXP (x,0)) == PLUS)
+ if (GET_CODE (XEXP (x,0)) == PLUS
+ && REG_P (XEXP (XEXP (x,0), 0))
+ && GET_CODE (XEXP (XEXP (x,0), 1)) == CONST_INT
+ && (INTVAL (XEXP (XEXP (x,0), 1))
+ <= MAX_LD_OFFSET (GET_MODE (x))))
{
- if (TARGET_ALL_DEBUG)
- {
- fprintf (stderr, ("extra_constraint:\n"
- "reload_completed: %d\n"
- "reload_in_progress: %d\n"),
- reload_completed, reload_in_progress);
- debug_rtx (x);
- }
- if (GET_CODE (x) == MEM
- && GET_CODE (XEXP (x,0)) == PLUS
- && REG_P (XEXP (XEXP (x,0), 0))
- && GET_CODE (XEXP (XEXP (x,0), 1)) == CONST_INT
- && (INTVAL (XEXP (XEXP (x,0), 1))
- <= MAX_LD_OFFSET (GET_MODE (x))))
+ rtx xx = XEXP (XEXP (x,0), 0);
+ int regno = REGNO (xx);
+ if (TARGET_ALL_DEBUG)
{
- rtx xx = XEXP (XEXP (x,0), 0);
- int regno = REGNO (xx);
- if (TARGET_ALL_DEBUG)
- {
- fprintf (stderr, ("extra_constraint:\n"
- "reload_completed: %d\n"
- "reload_in_progress: %d\n"),
- reload_completed, reload_in_progress);
- debug_rtx (x);
- }
- if (regno >= FIRST_PSEUDO_REGISTER)
- return 1; /* allocate pseudos */
- else if (regno == REG_Z || regno == REG_Y)
- return 1; /* strictly check */
- else if (xx == frame_pointer_rtx
- || xx == arg_pointer_rtx)
- return 1; /* XXX frame & arg pointer checks */
+ fprintf (stderr, ("extra_constraint:\n"
+ "reload_completed: %d\n"
+ "reload_in_progress: %d\n"),
+ reload_completed, reload_in_progress);
+ debug_rtx (x);
}
+ if (regno >= FIRST_PSEUDO_REGISTER)
+ return 1; /* allocate pseudos */
+ else if (regno == REG_Z || regno == REG_Y)
+ return 1; /* strictly check */
+ else if (xx == frame_pointer_rtx
+ || xx == arg_pointer_rtx)
+ return 1; /* XXX frame & arg pointer checks */
}
return 0;
}
case LEU:
return LTU;
default:
- abort ();
+ gcc_unreachable ();
}
}
rtx t = XEXP (src,0);
PUT_CODE (t, swap_condition (GET_CODE (t)));
- SET_SRC (pattern) = gen_rtx_NEG (GET_MODE (SET_SRC (pattern)),
+ SET_SRC (pattern) = gen_rtx_COMPARE (GET_MODE (SET_SRC (pattern)), const0_rtx,
SET_SRC (pattern));
INSN_CODE (next) = -1;
INSN_CODE (insn) = -1;
return 24;
}
-/* Ceate an RTX representing the place where a
+/* Create an RTX representing the place where a
library function returns a value of mode MODE. */
rtx
function returns a value of data type VALTYPE. */
rtx
-avr_function_value (tree type, tree func ATTRIBUTE_UNUSED)
+avr_function_value (const_tree type,
+ const_tree func ATTRIBUTE_UNUSED,
+ bool outgoing ATTRIBUTE_UNUSED)
{
unsigned int offs;
return gen_rtx_REG (BLKmode, RET_REGISTER + 2 - offs);
}
-/* Returns nonzero if the number MASK has only one bit set. */
-
-int
-mask_one_bit_p (HOST_WIDE_INT mask)
-{
- int i;
- unsigned HOST_WIDE_INT n=mask;
- for (i = 0; i < 32; ++i)
- {
- if (n & 0x80000000L)
- {
- if (n & 0x7fffffffL)
- return 0;
- else
- return 32-i;
- }
- n<<=1;
- }
- return 0;
-}
-
-
/* Places additional restrictions on the register class to
use when it is necessary to copy value X into a register
in class CLASS. */
enum reg_class
-preferred_reload_class (rtx x ATTRIBUTE_UNUSED, enum reg_class class)
+preferred_reload_class (rtx x ATTRIBUTE_UNUSED, enum reg_class rclass)
{
- return class;
+ return rclass;
}
int
-test_hard_reg_class (enum reg_class class, rtx x)
+test_hard_reg_class (enum reg_class rclass, rtx x)
{
int regno = true_regnum (x);
if (regno < 0)
return 0;
- if (TEST_HARD_REG_CLASS (class, regno))
+ if (TEST_HARD_REG_CLASS (rclass, regno))
return 1;
return 0;
int
avr_hard_regno_mode_ok (int regno, enum machine_mode mode)
{
- /* Bug workaround: recog.c (peep2_find_free_register) and probably
- a few other places assume that the frame pointer is a single hard
- register, so r29 may be allocated and overwrite the high byte of
- the frame pointer. Do not allow any value to start in r29. */
- if (regno == REG_Y + 1)
+ /* Disallow QImode in stack pointer regs. */
+ if ((regno == REG_SP || regno == (REG_SP + 1)) && mode == QImode)
return 0;
- /* Reload can use r28:r29 for reload register and for frame pointer
- in one insn. It's wrong. We must disable it. */
- if (mode != Pmode && reload_in_progress && frame_pointer_required_p ()
- && regno <= REG_Y && (regno + GET_MODE_SIZE (mode)) >= (REG_Y + 1))
+ /* The only thing that can go into registers r28:r29 is a Pmode. */
+ if (regno == REG_Y && mode == Pmode)
+ return 1;
+
+ /* Otherwise disallow all regno/mode combinations that span r28:r29. */
+ if (regno <= (REG_Y + 1) && (regno + GET_MODE_SIZE (mode)) >= (REG_Y + 1))
return 0;
if (mode == QImode)
return 1;
- /* if (regno < 24 && !AVR_ENHANCED)
- return 1;*/
- return !(regno & 1);
-}
-
-/* Returns 1 if X is a valid address for an I/O register of size SIZE
- (1 or 2). Used for lds/sts -> in/out optimization. Add 0x20 to SIZE
- to check for the lower half of I/O space (for cbi/sbi/sbic/sbis). */
-int
-avr_io_address_p (rtx x, int size)
-{
- return (optimize > 0 && GET_CODE (x) == CONST_INT
- && INTVAL (x) >= 0x20 && INTVAL (x) <= 0x60 - size);
-}
-
-/* Returns nonzero (bit number + 1) if X, or -X, is a constant power of 2. */
+ /* Modes larger than QImode occupy consecutive registers. */
+ if (regno + GET_MODE_SIZE (mode) > FIRST_PSEUDO_REGISTER)
+ return 0;
-int
-const_int_pow2_p (rtx x)
-{
- if (GET_CODE (x) == CONST_INT)
- {
- HOST_WIDE_INT d = INTVAL (x);
- HOST_WIDE_INT abs_d = (d >= 0) ? d : -d;
- return exact_log2 (abs_d) + 1;
- }
- return 0;
+ /* All modes larger than QImode should start in an even register. */
+ return !(regno & 1);
}
const char *
void
avr_output_addr_vec_elt (FILE *stream, int value)
{
- if (AVR_MEGA)
- fprintf (stream, "\t.word pm(.L%d)\n", value);
+ switch_to_section (progmem_section);
+ if (AVR_HAVE_JMP_CALL)
+ fprintf (stream, "\t.word gs(.L%d)\n", value);
else
fprintf (stream, "\trjmp .L%d\n", value);
-
- jump_tables_size++;
}
-/* Returns 1 if SCRATCH are safe to be allocated as a scratch
+/* Returns true if SCRATCH are safe to be allocated as a scratch
registers (for a define_peephole2) in the current function. */
+bool
+avr_hard_regno_scratch_ok (unsigned int regno)
+{
+ /* Interrupt functions can only use registers that have already been saved
+ by the prologue, even if they would normally be call-clobbered. */
+
+ if ((cfun->machine->is_interrupt || cfun->machine->is_signal)
+ && !df_regs_ever_live_p (regno))
+ return false;
+
+ return true;
+}
+
+/* Return nonzero if register OLD_REG can be renamed to register NEW_REG. */
+
int
-avr_peep2_scratch_safe (rtx scratch)
+avr_hard_regno_rename_ok (unsigned int old_reg ATTRIBUTE_UNUSED,
+ unsigned int new_reg)
{
- if ((interrupt_function_p (current_function_decl)
- || signal_function_p (current_function_decl))
- && leaf_function_p ())
- {
- int first_reg = true_regnum (scratch);
- int last_reg = first_reg + GET_MODE_SIZE (GET_MODE (scratch)) - 1;
- int reg;
+ /* Interrupt functions can only use registers that have already been
+ saved by the prologue, even if they would normally be
+ call-clobbered. */
+
+ if ((cfun->machine->is_interrupt || cfun->machine->is_signal)
+ && !df_regs_ever_live_p (new_reg))
+ return 0;
- for (reg = first_reg; reg <= last_reg; reg++)
- {
- if (!regs_ever_live[reg])
- return 0;
- }
- }
return 1;
}
/* Worker function for TARGET_RETURN_IN_MEMORY. */
static bool
-avr_return_in_memory (tree type, tree fntype ATTRIBUTE_UNUSED)
+avr_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED)
{
if (TYPE_MODE (type) == BLKmode)
{
projects / platform / upstream / gcc.git / blobdiff