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tcg-sparc: Implement neg.

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The fallback implementation of "ret = 0 - arg1" isn't ideal,
first because of the extra tcg op to load the zero, and second
because we fail to handle zero as %g0 for arg1 of the sub.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Richard Henderson 2010-02-16 13:55:15 -08:00 committed by Blue Swirl
parent 4fc8d6711a
commit 4b5a85c175
2 changed files with 16 additions and 2 deletions
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13
tcg/sparc/tcg-target.c
View File

@ -1234,6 +1234,10 @@ static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
c = ARITH_UMUL;
goto gen_arith;
OP_32_64(neg):
c = ARITH_SUB;
goto gen_arith1;
case INDEX_op_div_i32:
tcg_out_div32(s, args[0], args[1], args[2], const_args[2], 0);
break;
@ -1392,6 +1396,10 @@ static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
tcg_out_arithc(s, args[0], args[1], args[2], const_args[2], c);
break;
gen_arith1:
tcg_out_arithc(s, args[0], TCG_REG_G0, args[1], const_args[1], c);
break;
default:
fprintf(stderr, "unknown opcode 0x%x\n", opc);
tcg_abort();
@ -1431,6 +1439,8 @@ static const TCGTargetOpDef sparc_op_defs[] = {
{ INDEX_op_shr_i32, { "r", "r", "rJ" } },
{ INDEX_op_sar_i32, { "r", "r", "rJ" } },
{ INDEX_op_neg_i32, { "r", "rJ" } },
{ INDEX_op_brcond_i32, { "r", "rJ" } },
{ INDEX_op_setcond_i32, { "r", "r", "rJ" } },
@ -1484,6 +1494,9 @@ static const TCGTargetOpDef sparc_op_defs[] = {
{ INDEX_op_shl_i64, { "r", "r", "rJ" } },
{ INDEX_op_shr_i64, { "r", "r", "rJ" } },
{ INDEX_op_sar_i64, { "r", "r", "rJ" } },
{ INDEX_op_neg_i64, { "r", "rJ" } },
{ INDEX_op_ext32s_i64, { "r", "ri" } },
{ INDEX_op_ext32u_i64, { "r", "ri" } },

5
tcg/sparc/tcg-target.h
View File

@ -91,15 +91,16 @@ enum {
#define TCG_TARGET_HAS_div_i32
#define TCG_TARGET_HAS_div_i64
#define TCG_TARGET_HAS_neg_i32
#if TCG_TARGET_REG_BITS == 64
#define TCG_TARGET_HAS_ext32s_i64
#define TCG_TARGET_HAS_ext32u_i64
#define TCG_TARGET_HAS_neg_i64
#endif
//#define TCG_TARGET_HAS_bswap32_i32
//#define TCG_TARGET_HAS_bswap64_i64
//#define TCG_TARGET_HAS_neg_i32
//#define TCG_TARGET_HAS_neg_i64
/* Note: must be synced with dyngen-exec.h and Makefile.target */