--- /dev/null
+
+/* tc-h8500.c -- Assemble code for the Hitachi H8/500
+ Copyright (C) 1993 Free Software Foundation.
+
+ This file is part of GAS, the GNU Assembler.
+
+ GAS 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)
+ any later version.
+
+ GAS is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GAS; see the file COPYING. If not, write to
+ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/*
+ Written By Steve Chamberlain
+ sac@cygnus.com
+ */
+
+#include <stdio.h>
+#include "as.h"
+#include "bfd.h"
+
+#define DEFINE_TABLE
+#include "../opcodes/h8500-opc.h"
+#include <ctype.h>
+
+const char comment_chars[] =
+{';', 0};
+const char line_separator_chars[] =
+{'$', 0};
+const char line_comment_chars[] = "";
+
+/* This table describes all the machine specific pseudo-ops the assembler
+ has to support. The fields are:
+ pseudo-op name without dot
+ function to call to execute this pseudo-op
+ Integer arg to pass to the function
+ */
+
+void cons ();
+
+const pseudo_typeS md_pseudo_table[] =
+{
+ {"int", cons, 2},
+ {"data.b", cons, 1},
+ {"data.w", cons, 2},
+ {"data.l", cons, 4},
+ {"form", listing_psize, 0},
+ {"heading", listing_title, 0},
+ {"import", s_ignore, 0},
+ {"page", listing_eject, 0},
+ {"program", s_ignore, 0},
+ {0, 0, 0}
+};
+
+int md_reloc_size;
+
+const char EXP_CHARS[] = "eE";
+
+/* Chars that mean this number is a floating point constant */
+/* As in 0f12.456 */
+/* or 0d1.2345e12 */
+const char FLT_CHARS[] = "rRsSfFdDxXpP";
+
+#define C(a,b) ENCODE_RELAX(a,b)
+#define ENCODE_RELAX(what,length) (((what) << 2) + (length))
+
+#define GET_WHAT(x) ((x>>2))
+
+#define BYTE_DISP 1
+#define WORD_DISP 2
+#define UNDEF_BYTE_DISP 0
+#define UNDEF_WORD_DISP 3
+
+#define BRANCH 1
+#define SCB_F 2
+#define SCB_TST 3
+#define END 4
+
+#define BYTE_F 127
+#define BYTE_B -128
+#define WORD_F 32767
+#define WORD_B 32768
+
+relax_typeS md_relax_table[C (END, 0)];
+
+static struct hash_control *opcode_hash_control; /* Opcode mnemonics */
+
+/*
+ This function is called once, at assembler startup time. This should
+ set up all the tables, etc that the MD part of the assembler needs
+ */
+
+void
+md_begin ()
+{
+ h8500_opcode_info *opcode;
+ char prev_buffer[100];
+ int idx = 0;
+
+ opcode_hash_control = hash_new ();
+ prev_buffer[0] = 0;
+
+ /* Insert unique names into hash table */
+ for (opcode = h8500_table; opcode->name; opcode++)
+ {
+ if (idx != opcode->idx)
+ {
+ hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
+ idx++;
+ }
+ }
+
+ /* Initialize the relax table */
+ md_relax_table[C (BRANCH, BYTE_DISP)].rlx_forward = BYTE_F;
+ md_relax_table[C (BRANCH, BYTE_DISP)].rlx_backward = BYTE_B;
+ md_relax_table[C (BRANCH, BYTE_DISP)].rlx_length = 2;
+ md_relax_table[C (BRANCH, BYTE_DISP)].rlx_more = C (BRANCH, WORD_DISP);
+
+ md_relax_table[C (BRANCH, WORD_DISP)].rlx_forward = WORD_F;
+ md_relax_table[C (BRANCH, WORD_DISP)].rlx_backward = WORD_B;
+ md_relax_table[C (BRANCH, WORD_DISP)].rlx_length = 3;
+ md_relax_table[C (BRANCH, WORD_DISP)].rlx_more = 0;
+
+ md_relax_table[C (SCB_F, BYTE_DISP)].rlx_forward = BYTE_F;
+ md_relax_table[C (SCB_F, BYTE_DISP)].rlx_backward = BYTE_B;
+ md_relax_table[C (SCB_F, BYTE_DISP)].rlx_length = 3;
+ md_relax_table[C (SCB_F, BYTE_DISP)].rlx_more = C (SCB_F, WORD_DISP);
+
+ md_relax_table[C (SCB_F, WORD_DISP)].rlx_forward = WORD_F;
+ md_relax_table[C (SCB_F, WORD_DISP)].rlx_backward = WORD_B;
+ md_relax_table[C (SCB_F, WORD_DISP)].rlx_length = 8;
+ md_relax_table[C (SCB_F, WORD_DISP)].rlx_more = 0;
+
+ md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_forward = BYTE_F;
+ md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_backward = BYTE_B;
+ md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_length = 3;
+ md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_more = C (SCB_TST, WORD_DISP);
+
+ md_relax_table[C (SCB_TST, WORD_DISP)].rlx_forward = WORD_F;
+ md_relax_table[C (SCB_TST, WORD_DISP)].rlx_backward = WORD_B;
+ md_relax_table[C (SCB_TST, WORD_DISP)].rlx_length = 10;
+ md_relax_table[C (SCB_TST, WORD_DISP)].rlx_more = 0;
+
+}
+
+int rn; /* register number used by RN */
+int rs; /* register number used by RS */
+int rd; /* register number used by RD */
+int crb; /* byte size cr */
+int crw; /* word sized cr */
+
+expressionS displacement; /* displacement expression */
+int displacement_size; /* and size if given */
+
+int immediate_inpage;
+expressionS immediate; /* immediate expression */
+int immediate_size; /* and size if given */
+
+expressionS absolute; /* absolute expression */
+int absolute_size; /* and size if given */
+
+typedef struct
+{
+ int type;
+ int reg;
+ expressionS exp;
+ int page;
+}
+
+h8500_operand_info;
+
+/* try and parse a reg name, returns number of chars consumed */
+int
+parse_reg (src, mode, reg)
+ char *src;
+ int *mode;
+ unsigned int *reg;
+{
+ if (src[0] == 'r')
+ {
+ if (src[1] >= '0' && src[1] <= '7')
+ {
+ *mode = RN;
+ *reg = (src[1] - '0');
+ return 2;
+ }
+ }
+
+ if (src[0] == 's' && src[1] == 'p')
+ {
+ *mode = RN;
+ *reg = 7;
+ return 2;
+ }
+ if (src[0] == 'c' && src[1] == 'c' && src[2] == 'r')
+ {
+ *mode = CRB;
+ *reg = 1;
+ return 3;
+ }
+ if (src[0] == 's' && src[1] == 'r')
+ {
+ *mode = CRW;
+ *reg = 0;
+ return 2;
+ }
+
+ if (src[0] == 'b' && src[1] == 'r')
+ {
+ *mode = CRB;
+ *reg = 3;
+ return 2;
+ }
+
+ if (src[0] == 'e' && src[1] == 'p')
+ {
+ *mode = CRB;
+ *reg = 4;
+ return 2;
+ }
+
+ if (src[0] == 'd' && src[1] == 'p')
+ {
+ *mode = CRB;
+ *reg = 5;
+ return 2;
+ }
+
+ if (src[0] == 't' && src[1] == 'p')
+ {
+ *mode = CRW;
+ *reg = 7;
+ return 2;
+ }
+
+ if (src[0] == 'f' && src[1] == 'p')
+ {
+ *mode = RN;
+ *reg = 6;
+ return 2;
+ }
+ return 0;
+}
+
+char *
+parse_exp (s, op, page)
+ char *s;
+ expressionS *op;
+int *page;
+{
+ char *save;
+ char *new;
+ segT seg;
+
+ save = input_line_pointer;
+
+*page = 0;
+ if (s[0] == '%')
+ {
+ if (s[1] == 'p' && s[2] == 'a' && s[3] == 'g' && s[4] == 'e') {
+ s+=5;
+
+*page = 1;
+ }
+ else if (s[1] == 'o' && s[2] == 'f' && s[3] == 'f') {
+ s+=4;
+ }
+ }
+
+ input_line_pointer = s;
+
+ seg = expr (0, op);
+ new = input_line_pointer;
+ input_line_pointer = save;
+ if (SEG_NORMAL (seg))
+ return new;
+ switch (seg)
+ {
+ case SEG_ABSOLUTE:
+ case SEG_UNKNOWN:
+ case SEG_DIFFERENCE:
+ case SEG_BIG:
+ case SEG_REGISTER:
+ return new;
+ case SEG_ABSENT:
+ as_bad ("Missing operand");
+ return new;
+ default:
+ as_bad ("Don't understand operand of type %s", segment_name (seg));
+ return new;
+ }
+}
+
+static char *
+skip_colonthing (ptr, exp, def, size8, size16, size24)
+ char *ptr;
+ h8500_operand_info *exp;
+ int def;
+ int size8;
+ int size16;
+ int size24;
+{
+ ptr = parse_exp (ptr, &exp->exp, &exp->page);
+ if (*ptr == ':')
+ {
+ ptr++;
+ if (*ptr == '8')
+ {
+ ptr++;
+ exp->type = size8;
+ }
+ else if (ptr[0] == '1' & ptr[1] == '6')
+ {
+ ptr += 2;
+ exp->type = size16;
+ }
+ else if (ptr[0] == '2' & ptr[1] == '4')
+ {
+ if (!size24)
+ {
+ as_bad (":24 not valid for this opcode");
+ }
+ ptr += 2;
+ exp->type = size24;
+ }
+ else
+ {
+ as_bad ("expect :8,:16 or :24");
+ exp->type = size16;
+ }
+ }
+ else
+ {
+ if(exp->page) {
+ exp->type = IMM8;
+ }
+ else {
+ /* Let's work out the size from the context */
+ if (size8
+ && exp->exp.X_seg == SEG_ABSOLUTE
+ && exp->exp.X_add_number >= -128
+ && exp->exp.X_add_number <= 127)
+ {
+ exp->type = size8;
+ }
+ else
+ {
+ exp->type = def;
+ }
+ }
+ }
+ return ptr;
+}
+
+static int
+parse_reglist(src, op)
+char *src;
+h8500_operand_info *op;
+{
+ int mode;
+ int rn;
+ int mask = 0;
+ int rm;
+ int idx = 1; /* skip ( */
+ while (src[idx] && src[idx] != ')')
+ {
+ int done = parse_reg(src+idx, &mode, &rn);
+ if (done)
+ {
+ idx += done;
+ mask |= 1<<rn;
+ }
+ else
+ {
+ as_bad("syntax error in reg list");
+ return 0;
+ }
+ if (src[idx]== '-')
+ {
+ idx++;
+ done = parse_reg(src+idx, &mode, &rm);
+ if (done) {
+ idx += done;
+ while (rn <= rm) {
+ mask |= 1<<rn;
+ rn++;
+ }
+ }
+ else {
+ as_bad("missing final register in range");
+ }
+ }
+ if (src[idx] == ',')
+ idx++;
+ }
+ idx++;
+ op->exp.X_add_symbol = 0;
+ op->exp.X_subtract_symbol = 0;
+ op->exp.X_add_number = mask;
+ op->exp.X_seg = SEG_ABSOLUTE;
+ op->type= IMM8;
+ return idx;
+
+}
+/* The many forms of operand:
+
+ Rn Register direct
+ @Rn Register indirect
+ @(disp[:size], Rn) Register indirect with displacement
+ @Rn+
+ @-Rn
+ @aa[:size] absolute
+ #xx[:size] immediate data
+
+ */
+
+static void
+get_operand (ptr, op)
+ char **ptr;
+ h8500_operand_info *op;
+{
+ char *src = *ptr;
+ int mode;
+ unsigned int num;
+ unsigned int len;
+ unsigned int size;
+
+ if (src[0] == '(' && src[1] == 'r')
+ {
+ /* This is a register list */
+ *ptr = src + parse_reglist(src, op);
+ return;
+ }
+
+ len = parse_reg (src, &op->type, &op->reg);
+
+ if (len)
+ {
+ *ptr = src + len;
+ return;
+ }
+
+ if (*src == '@')
+ {
+ src++;
+ if (*src == '-')
+ {
+ src++;
+ len = parse_reg (src, &mode, &num);
+ if (len == 0)
+ {
+ /* Oops, not a reg after all, must be ordinary exp */
+ src--;
+ /* must be a symbol */
+ *ptr = skip_colonthing (src, op, ABS16, ABS8, ABS16, ABS24);
+ return;
+ }
+
+ op->type = RNDEC;
+ op->reg = num;
+ *ptr = src + len;
+ return;
+ }
+ if (*src == '(')
+ {
+ /* Disp */
+ src++;
+
+ src = skip_colonthing (src, op, RNIND_D16, RNIND_D8, RNIND_D16, 0);
+
+ if (*src != ',')
+ {
+ as_bad ("expected @(exp, Rn)");
+ return;
+ }
+ src++;
+ len = parse_reg (src, &mode, &op->reg);
+ if (len == 0 || mode != RN)
+ {
+ as_bad ("expected @(exp, Rn)");
+ return;
+ }
+ src += len;
+ if (*src != ')')
+ {
+ as_bad ("expected @(exp, Rn)");
+ return;
+ }
+ *ptr = src + 1;
+ return;
+ }
+ len = parse_reg (src, &mode, &num);
+
+ if (len)
+ {
+ src += len;
+ if (*src == '+')
+ {
+ src++;
+ if (mode != RN)
+ {
+ as_bad ("@Rn+ needs word register");
+ return;
+ }
+ op->type = RNINC;
+ op->reg = num;
+ *ptr = src;
+ return;
+ }
+ if (mode != RN)
+ {
+ as_bad ("@Rn needs word register");
+ return;
+ }
+ op->type = RNIND;
+ op->reg = num;
+ *ptr = src;
+ return;
+ }
+ else
+ {
+ /* must be a symbol */
+ *ptr = skip_colonthing (src, op, ABS16, ABS8, ABS16, 0);
+ return;
+ }
+ }
+
+ if (*src == '#')
+ {
+ src++;
+ *ptr = skip_colonthing (src, op, IMM16, IMM8, IMM16, 0);
+ return;
+ }
+ else
+ {
+ *ptr = skip_colonthing (src, op, PCREL8, PCREL8, PCREL16, 0);
+ }
+}
+
+static
+char *
+get_operands (info, args, operand)
+ h8500_opcode_info *info;
+ char *args;
+ h8500_operand_info *operand;
+
+{
+ char *ptr = args;
+
+ switch (info->nargs)
+ {
+ case 0:
+ operand[0].type = 0;
+ operand[1].type = 0;
+ break;
+
+ case 1:
+ ptr++;
+ get_operand (&ptr, operand + 0, 0);
+ operand[1].type = 0;
+ break;
+
+ case 2:
+ ptr++;
+ get_operand (&ptr, operand + 0, 0);
+ if (*ptr == ',')
+ ptr++;
+ get_operand (&ptr, operand + 1, 1);
+ break;
+
+ default:
+ abort ();
+ }
+
+ return ptr;
+}
+
+/* Passed a pointer to a list of opcodes which use different
+ addressing modes, return the opcode which matches the opcodes
+ provided
+ */
+
+int pcrel8;
+
+static
+h8500_opcode_info *
+get_specific (opcode, operands)
+ h8500_opcode_info *opcode;
+ h8500_operand_info *operands;
+{
+ h8500_opcode_info *this_try = opcode;
+ int found = 0;
+ unsigned int noperands = opcode->nargs;
+
+ unsigned int dispreg;
+ unsigned int this_index = opcode->idx;
+
+ while (this_index == opcode->idx && !found)
+ {
+ unsigned int i;
+
+ this_try = opcode++;
+
+ /* look at both operands needed by the opcodes and provided by
+ the user*/
+ for (i = 0; i < noperands; i++)
+ {
+ h8500_operand_info *user = operands + i;
+
+ switch (this_try->arg_type[i])
+ {
+ case FPIND_D16:
+ /* Opcode needs (disp:16,fp) */
+ if (user->type == DISP16 && user->reg == 6)
+ {
+ displacement = user->exp;
+ continue;
+ }
+ break;
+ case FPIND_D8:
+ /* Opcode needs (disp:8,fp) */
+ if (user->type == DISP8 && user->reg == 6)
+ {
+ displacement = user->exp;
+ continue;
+ }
+ break;
+ case RDIND_D16:
+ if (user->type == RNIND_D16)
+ {
+ displacement = user->exp;
+ rd = user->reg;
+ continue;
+ }
+ break;
+ case RDIND_D8:
+ if (user->type == RNIND_D8)
+ {
+ displacement = user->exp;
+ rd = user->reg;
+ continue;
+ }
+ break;
+ case RNIND_D16:
+ case RNIND_D8:
+ if (user->type == this_try->arg_type[i])
+ {
+ displacement = user->exp;
+ rn = user->reg;
+ continue;
+ }
+ break;
+ case SPDEC:
+ if (user->type == RNDEC && user->reg == 7)
+ {
+ continue;
+ }
+ break;
+ case ABS16:
+ if (user->type == ABS16)
+ {
+ absolute = user->exp;
+ continue;
+ }
+ break;
+ case ABS8:
+ if (user->type == ABS8)
+ {
+ absolute = user->exp;
+ continue;
+ }
+ break;
+ case ABS24:
+ if (user->type == ABS24)
+ {
+ absolute = user->exp;
+ continue;
+ }
+ break;
+ case CRB:
+ if (user->type == CRB)
+ {
+ crb = user->reg;
+ continue;
+ }
+ break;
+ case CRW:
+ if (user->type == CRW)
+ {
+ crw = user->reg;
+ continue;
+ }
+ break;
+ case DISP16:
+ if (user->type == DISP16)
+ {
+ displacement = user->exp;
+ continue;
+ }
+ break;
+ case DISP8:
+ if (user->type == DISP8)
+ {
+ displacement = user->exp;
+ continue;
+ }
+ break;
+ case FP:
+ if (user->type == RN && user->reg == 6)
+ {
+ continue;
+ }
+ break;
+ case PCREL16:
+ if (user->type == PCREL16)
+ {
+ displacement = user->exp;
+ continue;
+ }
+ break;
+ case PCREL8:
+ if (user->type == PCREL8)
+ {
+ displacement = user->exp;
+ pcrel8 = 1;
+ continue;
+ }
+ break;
+
+ case IMM16:
+ if (user->type == IMM16
+ || user->type == IMM8)
+ {
+ immediate_inpage = user->page;
+ immediate = user->exp;
+ continue;
+ }
+ break;
+ case RLIST:
+ case IMM8:
+ if (user->type == IMM8)
+ {
+ immediate_inpage = user->page;
+ immediate = user->exp;
+ continue;
+ }
+ break;
+ case IMM4:
+ if (user->type == IMM8)
+ {
+ immediate_inpage = user->page;
+ immediate = user->exp;
+ continue;
+ }
+ break;
+ case QIM:
+ if (user->type == IMM8
+ && user->exp.X_seg == SEG_ABSOLUTE
+ &&
+ (user->exp.X_add_number == -2
+ || user->exp.X_add_number == -1
+ || user->exp.X_add_number == 1
+ || user->exp.X_add_number == 2))
+ {
+ immediate_inpage = user->page;
+ immediate = user->exp;
+ continue;
+ }
+ break;
+ case RD:
+ if (user->type == RN)
+ {
+ rd = user->reg;
+ continue;
+ }
+ break;
+ case RS:
+ if (user->type == RN)
+ {
+ rs = user->reg;
+ continue;
+ }
+ break;
+ case RDIND:
+ if (user->type == RNIND)
+ {
+ rd = user->reg;
+ continue;
+ }
+ break;
+ case RNINC:
+ case RNIND:
+ case RNDEC:
+ case RN:
+
+ if (user->type == this_try->arg_type[i])
+ {
+ rn = user->reg;
+ continue;
+ }
+ break;
+ case SP:
+ if (user->type == RN && user->reg == 7)
+ {
+ continue;
+ }
+ break;
+ default:
+ printf ("unhandled %d\n", this_try->arg_type[i]);
+ break;
+ }
+
+ /* If we get here this didn't work out */
+ goto fail;
+ }
+ found = 1;
+ fail:;
+
+ }
+
+ if (found)
+ return this_try;
+ else
+ return 0;
+}
+
+int
+check (operand, low, high)
+ expressionS *operand;
+ int low;
+ int high;
+{
+ if (operand->X_seg != SEG_ABSOLUTE
+ || operand->X_add_number < low
+ || operand->X_add_number > high)
+ {
+ as_bad ("operand must be absolute in range %d..%d", low, high);
+ }
+ return operand->X_add_number;
+}
+
+#if 0
+static void
+DEFUN (check_operand, (operand, width, string),
+ struct h8_op *operand AND
+ unsigned int width AND
+ char *string)
+{
+ if (operand->exp.X_add_symbol == 0
+ && operand->exp.X_subtract_symbol == 0)
+ {
+
+ /* No symbol involved, let's look at offset, it's dangerous if any of
+ the high bits are not 0 or ff's, find out by oring or anding with
+ the width and seeing if the answer is 0 or all fs*/
+ if ((operand->exp.X_add_number & ~width) != 0 &&
+ (operand->exp.X_add_number | width) != (~0))
+ {
+ as_warn ("operand %s0x%x out of range.", string, operand->exp.X_add_number);
+ }
+ }
+
+}
+
+#endif
+
+insert (size, output, index, exp, reloc, opcode)
+ char *output;
+ int index;
+ expressionS *exp;
+ char *opcode;
+{
+ md_number_to_chars (output + index, exp->X_add_number, size);
+ exp->X_add_number = 0;
+ if (exp->X_add_symbol || exp->X_subtract_symbol)
+ {
+ fix_new (frag_now,
+ output - frag_now->fr_literal + index,
+ size,
+ exp->X_add_symbol,
+ exp->X_subtract_symbol,
+ (short) (exp->X_add_number),
+ 0,
+ reloc);
+ }
+}
+
+void
+build_relaxable_instruction (opcode, operand)
+ h8500_opcode_info *opcode;
+ h8500_operand_info *operand;
+{
+ /* All relaxable instructions start life as two bytes but can become
+ three bytes long if a lonely branch and up to 9 bytes if long scb
+ */
+ char *p;
+ int len;
+ int type;
+
+ if (opcode->bytes[0].contents == 0x01)
+ {
+ type = SCB_F;
+ }
+ else if (opcode->bytes[0].contents == 0x06
+ || opcode->bytes[0].contents == 0x07)
+ {
+ type = SCB_TST;
+ }
+ else
+ {
+ type = BRANCH;
+ }
+
+ p = frag_var (rs_machine_dependent,
+ md_relax_table[C (type, WORD_DISP)].rlx_length,
+ len = md_relax_table[C (type, BYTE_DISP)].rlx_length,
+ C (type, UNDEF_BYTE_DISP),
+ displacement.X_add_symbol,
+ displacement.X_add_number,
+ 0);
+
+ p[0] = opcode->bytes[0].contents;
+ if (type != BRANCH)
+ {
+ p[1] = opcode->bytes[1].contents | rs;
+ }
+}
+
+/* Now we know what sort of opcodes it is, lets build the bytes -
+ */
+static void
+build_bytes (opcode, operand)
+ h8500_opcode_info *opcode;
+ h8500_operand_info *operand;
+
+{
+ unsigned int i;
+
+ char part;
+ int index;
+ char high;
+ int nib;
+ int byte;
+
+ if (pcrel8)
+ {
+ pcrel8 = 0;
+ build_relaxable_instruction (opcode, operand);
+ }
+ else
+ {
+ char *output = frag_more (opcode->length);
+
+ memset (output, 0, opcode->length);
+ for (index = 0; index < opcode->length; index++)
+ {
+ output[index] = opcode->bytes[index].contents;
+
+ switch (opcode->bytes[index].insert)
+ {
+ default:
+ printf ("failed for %d\n", opcode->bytes[index].insert);
+ break;
+ case 0:
+ break;
+ case RN:
+ output[index] |= rn;
+ break;
+ case RD:
+ output[index] |= rd;
+ break;
+ case RS:
+ output[index] |= rs;
+ break;
+ case DISP16:
+ case FPIND_D16:
+ insert (2, output, index, &displacement, R_H8500_IMM16);
+ index++;
+ break;
+ case DISP8:
+ case FPIND_D8:
+ insert (1, output, index, &displacement, R_H8500_IMM8);
+ break;
+ case IMM16:
+ insert (2, output, index, &immediate, R_H8500_IMM16);
+ index++;
+ break;
+ case RLIST:
+ case IMM8:
+ insert (1, output, index, &immediate, immediate_inpage ?
+ R_H8500_HIGH8 : R_H8500_IMM8);
+ break;
+ case PCREL16:
+ insert (2, output, index, &displacement, R_H8500_PCREL16);
+ index++;
+ break;
+ case PCREL8:
+ insert (1, output, index, &displacement, R_H8500_PCREL8, output);
+ break;
+ case IMM4:
+ output[index] |= check (&immediate, 0, 15);
+ break;
+ case CRB:
+ output[index] |= crb;
+ break;
+ case CRW:
+ output[index] |= crw;
+ break;
+ case ABS16:
+ insert (2, output, index, absolute, R_H8500_IMM16);
+ index++;
+ break;
+ case ABS8:
+ insert (1, output, index, absolute, R_H8500_IMM8);
+ break;
+ case QIM:
+ switch (immediate.X_add_number)
+ {
+ case -2:
+ output[index] |= 0x5;
+ break;
+ case -1:
+ output[index] |= 0x4;
+ break;
+ case 1:
+ output[index] |= 0;
+ break;
+ case 2:
+ output[index] |= 1;
+ break;
+ }
+ break;
+ }
+ }
+ }
+}
+
+/* This is the guts of the machine-dependent assembler. STR points to a
+ machine dependent instruction. This funciton is supposed to emit
+ the frags/bytes it assembles to.
+ */
+
+void
+DEFUN (md_assemble, (str),
+ char *str)
+{
+ char *op_start;
+ char *op_end;
+ unsigned int i;
+ h8500_operand_info operand[2];
+ h8500_opcode_info *opcode;
+ h8500_opcode_info *prev_opcode;
+ char name[11];
+ char *dot = 0;
+ char c;
+
+ int nlen = 0;
+
+ /* Drop leading whitespace */
+ while (*str == ' ')
+ str++;
+
+ /* find the op code end */
+ for (op_start = op_end = str;
+ *op_end != 0 && *op_end != ' ';
+ op_end++)
+ {
+ if (*op_end != '.'
+ && *op_end != ':'
+ && nlen < 10)
+ {
+ name[nlen++] = *op_end;
+ }
+ }
+ name[nlen] = 0;
+
+ if (op_end == op_start)
+ {
+ as_bad ("can't find opcode ");
+ }
+
+ opcode = (h8500_opcode_info *) hash_find (opcode_hash_control, name);
+
+ if (opcode == NULL)
+ {
+ as_bad ("unknown opcode");
+ return;
+ }
+
+ input_line_pointer = get_operands (opcode, op_end, operand);
+ prev_opcode = opcode;
+
+ opcode = get_specific (opcode, operand);
+
+ if (opcode == 0)
+ {
+ /* Couldn't find an opcode which matched the operands */
+ char *where = frag_more (2);
+
+ where[0] = 0x0;
+ where[1] = 0x0;
+ as_bad ("invalid operands for opcode");
+ return;
+ }
+
+ build_bytes (opcode, operand);
+
+}
+
+void
+DEFUN (tc_crawl_symbol_chain, (headers),
+ object_headers * headers)
+{
+ printf ("call to tc_crawl_symbol_chain \n");
+}
+
+symbolS *
+DEFUN (md_undefined_symbol, (name),
+ char *name)
+{
+ return 0;
+}
+
+void
+DEFUN (tc_headers_hook, (headers),
+ object_headers * headers)
+{
+ printf ("call to tc_headers_hook \n");
+}
+
+void
+DEFUN_VOID (md_end)
+{
+}
+
+/* Various routines to kill one day */
+/* Equal to MAX_PRECISION in atof-ieee.c */
+#define MAX_LITTLENUMS 6
+
+/* Turn a string in input_line_pointer into a floating point constant of type
+ type, and store the appropriate bytes in *litP. The number of LITTLENUMS
+ emitted is stored in *sizeP . An error message is returned, or NULL on OK.
+ */
+char *
+md_atof (type, litP, sizeP)
+ char type;
+ char *litP;
+ int *sizeP;
+{
+ int prec;
+ LITTLENUM_TYPE words[MAX_LITTLENUMS];
+ LITTLENUM_TYPE *wordP;
+ char *t;
+ char *atof_ieee ();
+
+ switch (type)
+ {
+ case 'f':
+ case 'F':
+ case 's':
+ case 'S':
+ prec = 2;
+ break;
+
+ case 'd':
+ case 'D':
+ case 'r':
+ case 'R':
+ prec = 4;
+ break;
+
+ case 'x':
+ case 'X':
+ prec = 6;
+ break;
+
+ case 'p':
+ case 'P':
+ prec = 6;
+ break;
+
+ default:
+ *sizeP = 0;
+ return "Bad call to MD_ATOF()";
+ }
+ t = atof_ieee (input_line_pointer, type, words);
+ if (t)
+ input_line_pointer = t;
+
+ *sizeP = prec * sizeof (LITTLENUM_TYPE);
+ for (wordP = words; prec--;)
+ {
+ md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
+ litP += sizeof (LITTLENUM_TYPE);
+ }
+ return ""; /* Someone should teach Dean about null pointers */
+}
+
+int
+md_parse_option (argP, cntP, vecP)
+ char **argP;
+ int *cntP;
+ char ***vecP;
+
+{
+ return 0;
+
+}
+
+int md_short_jump_size;
+
+void
+tc_aout_fix_to_chars ()
+{
+ printf ("call to tc_aout_fix_to_chars \n");
+ abort ();
+}
+
+void
+md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
+ char *ptr;
+ long from_addr;
+ long to_addr;
+ fragS *frag;
+ symbolS *to_symbol;
+{
+ as_fatal ("failed sanity check.");
+}
+
+void
+md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
+ char *ptr;
+ long from_addr, to_addr;
+ fragS *frag;
+ symbolS *to_symbol;
+{
+ as_fatal ("failed sanity check.");
+}
+
+static
+void
+wordify_scb (buffer, disp_size, inst_size)
+ char *buffer;
+ int *disp_size;
+ int *inst_size;
+{
+ int rn = buffer[1] & 0x7;
+
+ switch (buffer[0])
+ {
+ case 0x0e: /* BSR */
+ case 0x20:
+ case 0x21:
+ case 0x22:
+ case 0x23:
+ case 0x25:
+ case 0x26:
+ case 0x27:
+ case 0x28:
+ case 0x29:
+ case 0x2a:
+ case 0x2b:
+ case 0x2c:
+ case 0x2d:
+ case 0x2e:
+ case 0x2f:
+ buffer[0] |= 0x10;
+ buffer[1] = 0;
+ buffer[2] = 0;
+ *disp_size = 2;
+ *inst_size = 1;
+ return;
+ default:
+ abort ();
+
+ case 0x01:
+ *inst_size = 6;
+ *disp_size = 2;
+ break;
+ case 0x06:
+ *inst_size = 8;
+ *disp_size = 2;
+
+ *buffer++ = 0x26; /* bne + 8 */
+ *buffer++ = 0x08;
+ break;
+ case 0x07:
+ *inst_size = 8;
+ *disp_size = 2;
+ *buffer++ = 0x27; /* bne + 8 */
+ *buffer++ = 0x08;
+ break;
+
+ }
+ *buffer++ = 0xa8 | rn; /* addq -1,rn */
+ *buffer++ = 0x0c;
+ *buffer++ = 0x04; /* cmp #0xff:8, rn */
+ *buffer++ = 0xff;
+ *buffer++ = 0x70 | rn;
+ *buffer++ = 0x36; /* bne ... */
+ *buffer++ = 0;
+ *buffer++ = 0;
+}
+
+/*
+called after relaxing, change the frags so they know how big they are
+*/
+void
+md_convert_frag (headers, fragP)
+ object_headers *headers;
+ fragS *fragP;
+
+{
+ fixS *fixP;
+ int disp_size = 0;
+ int inst_size = 0;
+ char *buffer = fragP->fr_fix + fragP->fr_literal;
+
+ switch (fragP->fr_subtype)
+ {
+ case C (BRANCH, BYTE_DISP):
+ disp_size = 1;
+ inst_size = 1;
+ break;
+
+ case C (SCB_F, BYTE_DISP):
+ case C (SCB_TST, BYTE_DISP):
+ disp_size = 1;
+ inst_size = 2;
+ break;
+
+ /* Branches to a known 16 bit displacement */
+
+ /* Turn on the 16bit bit */
+ case C (BRANCH, WORD_DISP):
+ case C (SCB_F, WORD_DISP):
+ case C (SCB_TST, WORD_DISP):
+ wordify_scb (buffer, &disp_size, &inst_size);
+ break;
+
+ case C (BRANCH, UNDEF_WORD_DISP):
+ case C (SCB_F, UNDEF_WORD_DISP):
+ case C (SCB_TST, UNDEF_WORD_DISP):
+ /* This tried to be relaxed, but didn't manage it, it now needs a
+ fix */
+ wordify_scb (buffer, &disp_size, &inst_size);
+
+ /* Make a reloc */
+ fixP = fix_new (fragP,
+ fragP->fr_fix + inst_size,
+ 2,
+ fragP->fr_symbol,
+ 0,
+ fragP->fr_offset,
+ 0,
+ R_H8500_PCREL16);
+
+ fragP->fr_fix += disp_size + inst_size;
+ fragP->fr_var = 0;
+ return;
+ break;
+ default:
+ abort ();
+ }
+ if (inst_size)
+ {
+ /* Get the address of the end of the instruction */
+ int next_inst = fragP->fr_fix + fragP->fr_address + disp_size + inst_size;
+ int targ_addr = (S_GET_VALUE (fragP->fr_symbol) +
+ fragP->fr_offset);
+ int disp = targ_addr - next_inst;
+
+ md_number_to_chars (buffer + inst_size, disp, disp_size);
+ fragP->fr_fix += disp_size + inst_size;
+ fragP->fr_var = 0;
+ }
+
+}
+
+long
+DEFUN (md_section_align, (seg, size),
+ segT seg AND
+ long size)
+{
+ return ((size + (1 << section_alignment[(int) seg]) - 1) & (-1 << section_alignment[(int) seg]));
+
+}
+
+void
+md_apply_fix (fixP, val)
+ fixS *fixP;
+ long val;
+{
+ char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
+
+ switch (fixP->fx_size)
+ {
+ case 1:
+ *buf++ = val;
+ break;
+ case 2:
+ *buf++ = (val >> 8);
+ *buf++ = val;
+ break;
+ case 4:
+ *buf++ = (val >> 24);
+ *buf++ = (val >> 16);
+ *buf++ = (val >> 8);
+ *buf++ = val;
+ break;
+ default:
+ abort ();
+
+ }
+}
+
+void
+DEFUN (md_operand, (expressionP), expressionS * expressionP)
+{
+}
+
+int md_long_jump_size;
+
+/*
+called just before address relaxation, return the length
+by which a fragment must grow to reach it's destination
+*/
+int
+md_estimate_size_before_relax (fragP, segment_type)
+ register fragS *fragP;
+ register segT segment_type;
+{
+ int growth = 0;
+ char *buffer = fragP->fr_fix + fragP->fr_literal;
+ int what = GET_WHAT (fragP->fr_subtype);
+
+ switch (fragP->fr_subtype)
+ {
+ default:
+ abort();
+ case C (BRANCH, UNDEF_BYTE_DISP):
+ case C (SCB_F, UNDEF_BYTE_DISP):
+ case C (SCB_TST, UNDEF_BYTE_DISP):
+ /* used to be a branch to somewhere which was unknown */
+ if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
+ {
+ /* Got a symbol and it's defined in this segment, become byte
+ sized - maybe it will fix up */
+ fragP->fr_subtype = C (what, BYTE_DISP);
+ }
+ else
+ {
+ /* Its got a segment, but its not ours, so it will always be long */
+ fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
+ fragP->fr_var = md_relax_table[C(what, WORD_DISP)].rlx_length;
+ return md_relax_table[C(what, WORD_DISP)].rlx_length;
+ }
+ }
+ return fragP->fr_var + fragP->fr_fix;
+}
+
+/* Put number into target byte order */
+
+void
+md_number_to_chars (ptr, use, nbytes)
+ char *ptr;
+ long use;
+ int nbytes;
+{
+ switch (nbytes)
+ {
+ case 4:
+ *ptr++ = (use >> 24) & 0xff;
+ case 3:
+ *ptr++ = (use >> 16) & 0xff;
+ case 2:
+ *ptr++ = (use >> 8) & 0xff;
+ case 1:
+ *ptr++ = (use >> 0) & 0xff;
+ break;
+ default:
+ abort ();
+ }
+}
+long
+md_pcrel_from (fixP)
+ fixS *fixP;
+
+{
+ return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
+}
+
+void
+tc_coff_symbol_emit_hook ()
+{
+}
+
+void
+tc_reloc_mangle (fix_ptr, intr, base)
+ fixS *fix_ptr;
+ struct internal_reloc *intr;
+ bfd_vma base;
+
+{
+ symbolS *symbol_ptr;
+
+ symbol_ptr = fix_ptr->fx_addsy;
+
+ /* If this relocation is attached to a symbol then it's ok
+ to output it */
+ if (fix_ptr->fx_r_type == RELOC_32)
+ {
+ /* cons likes to create reloc32's whatever the size of the reloc..
+ */
+ switch (fix_ptr->fx_size)
+ {
+ case 2:
+ intr->r_type = R_IMM16;
+ break;
+ case 1:
+ intr->r_type = R_IMM8;
+ break;
+ default:
+ abort ();
+ }
+ }
+ else
+ {
+ intr->r_type = fix_ptr->fx_r_type;
+ }
+
+ intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
+ intr->r_offset = fix_ptr->fx_offset;
+
+ if (symbol_ptr)
+ intr->r_symndx = symbol_ptr->sy_number;
+ else
+ intr->r_symndx = -1;
+
+}
+
+/* end of tc-h8500.c */
projects / external / binutils.git / commitdiff