extern enum rtx_code xtensa_shlrd_which_direction (rtx, rtx);
extern bool xtensa_split1_finished_p (void);
extern void xtensa_split_DI_reg_imm (rtx *);
+extern bool xtensa_match_CLAMPS_imms_p (rtx, rtx);
#ifdef TREE_CODE
extern void init_cumulative_args (CUMULATIVE_ARGS *, int);
}
+/* Return true if the constants used in the application of smin() following
+ smax() meet the specifications of the CLAMPS machine instruction. */
+bool
+xtensa_match_CLAMPS_imms_p (rtx cst_max, rtx cst_min)
+{
+ int max, min;
+
+ return IN_RANGE (max = exact_log2 (-INTVAL (cst_max)), 7, 22)
+ && IN_RANGE (min = exact_log2 (INTVAL (cst_min) + 1), 7, 22)
+ && max == min;
+}
+
+
/* Implement TARGET_CANNOT_FORCE_CONST_MEM. */
static bool
#define TARGET_NSA XCHAL_HAVE_NSA
#define TARGET_MINMAX XCHAL_HAVE_MINMAX
#define TARGET_SEXT XCHAL_HAVE_SEXT
+#define TARGET_CLAMPS XCHAL_HAVE_CLAMPS
#define TARGET_BOOLEANS XCHAL_HAVE_BOOLEANS
#define TARGET_HARD_FLOAT XCHAL_HAVE_FP
#define TARGET_HARD_FLOAT_DIV XCHAL_HAVE_FP_DIV
(set_attr "length" "3")])
\f
+;; Signed clamp.
+
+(define_insn_and_split "*xtensa_clamps"
+ [(set (match_operand:SI 0 "register_operand" "=a")
+ (smax:SI (smin:SI (match_operand:SI 1 "register_operand" "r")
+ (match_operand:SI 2 "const_int_operand" "i"))
+ (match_operand:SI 3 "const_int_operand" "i")))]
+ "TARGET_CLAMPS
+ && xtensa_match_CLAMPS_imms_p (operands[3], operands[2])"
+ "#"
+ "&& 1"
+ [(set (match_dup 0)
+ (smin:SI (smax:SI (match_dup 1)
+ (match_dup 3))
+ (match_dup 2)))]
+ ""
+ [(set_attr "type" "arith")
+ (set_attr "mode" "SI")
+ (set_attr "length" "3")])
+
+(define_insn "*xtensa_clamps"
+ [(set (match_operand:SI 0 "register_operand" "=a")
+ (smin:SI (smax:SI (match_operand:SI 1 "register_operand" "r")
+ (match_operand:SI 2 "const_int_operand" "i"))
+ (match_operand:SI 3 "const_int_operand" "i")))]
+ "TARGET_CLAMPS
+ && xtensa_match_CLAMPS_imms_p (operands[2], operands[3])"
+{
+ static char result[64];
+ sprintf (result, "clamps\t%%0, %%1, %d", floor_log2 (-INTVAL (operands[2])));
+ return result;
+}
+ [(set_attr "type" "arith")
+ (set_attr "mode" "SI")
+ (set_attr "length" "3")])
+
+\f
;; Count redundant leading sign bits and leading/trailing zeros,
;; and find first bit.