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| author | Richard Henderson <rth@twiddle.net> | 2012-09-21 10:13:36 -0700 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-21 19:53:17 +0200 |
| commit | d0a16297c97ecf6be259a9a98af7a2dac9230939 (patch) | |
| tree | 225b5405f8e802beca1a71495cc82de63baab9c2 | |
| parent | 57e289de7330a97ff4c9919a1dad54ca0650cfa7 (diff) | |
| download | qemu-d0a16297c97ecf6be259a9a98af7a2dac9230939.tar.gz qemu-d0a16297c97ecf6be259a9a98af7a2dac9230939.tar.bz2 qemu-d0a16297c97ecf6be259a9a98af7a2dac9230939.zip | |
tcg-i386: Implement movcond
Signed-off-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
| -rw-r--r-- | tcg/i386/tcg-target.c | 29 | ||||
| -rw-r--r-- | tcg/i386/tcg-target.h | 7 |
2 files changed, 35 insertions, 1 deletions
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index 3017858751..aa1fa9ff4c 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -249,6 +249,7 @@ static inline int tcg_target_const_match(tcg_target_long val, #define OPC_ADD_GvEv (OPC_ARITH_GvEv | (ARITH_ADD << 3)) #define OPC_BSWAP (0xc8 | P_EXT) #define OPC_CALL_Jz (0xe8) +#define OPC_CMOVCC (0x40 | P_EXT) /* ... plus condition code */ #define OPC_CMP_GvEv (OPC_ARITH_GvEv | (ARITH_CMP << 3)) #define OPC_DEC_r32 (0x48) #define OPC_IMUL_GvEv (0xaf | P_EXT) @@ -936,6 +937,24 @@ static void tcg_out_setcond2(TCGContext *s, const TCGArg *args, } #endif +static void tcg_out_movcond32(TCGContext *s, TCGCond cond, TCGArg dest, + TCGArg c1, TCGArg c2, int const_c2, + TCGArg v1) +{ + tcg_out_cmp(s, c1, c2, const_c2, 0); + tcg_out_modrm(s, OPC_CMOVCC | tcg_cond_to_jcc[cond], dest, v1); +} + +#if TCG_TARGET_REG_BITS == 64 +static void tcg_out_movcond64(TCGContext *s, TCGCond cond, TCGArg dest, + TCGArg c1, TCGArg c2, int const_c2, + TCGArg v1) +{ + tcg_out_cmp(s, c1, c2, const_c2, P_REXW); + tcg_out_modrm(s, OPC_CMOVCC | tcg_cond_to_jcc[cond] | P_REXW, dest, v1); +} +#endif + static void tcg_out_branch(TCGContext *s, int call, tcg_target_long dest) { tcg_target_long disp = dest - (tcg_target_long)s->code_ptr - 5; @@ -1668,6 +1687,10 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, tcg_out_setcond32(s, args[3], args[0], args[1], args[2], const_args[2]); break; + case INDEX_op_movcond_i32: + tcg_out_movcond32(s, args[5], args[0], args[1], + args[2], const_args[2], args[3]); + break; OP_32_64(bswap16): tcg_out_rolw_8(s, args[0]); @@ -1796,6 +1819,10 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, tcg_out_setcond64(s, args[3], args[0], args[1], args[2], const_args[2]); break; + case INDEX_op_movcond_i64: + tcg_out_movcond64(s, args[5], args[0], args[1], + args[2], const_args[2], args[3]); + break; case INDEX_op_bswap64_i64: tcg_out_bswap64(s, args[0]); @@ -1880,6 +1907,7 @@ static const TCGTargetOpDef x86_op_defs[] = { { INDEX_op_setcond_i32, { "q", "r", "ri" } }, { INDEX_op_deposit_i32, { "Q", "0", "Q" } }, + { INDEX_op_movcond_i32, { "r", "r", "ri", "r", "0" } }, #if TCG_TARGET_REG_BITS == 32 { INDEX_op_mulu2_i32, { "a", "d", "a", "r" } }, @@ -1934,6 +1962,7 @@ static const TCGTargetOpDef x86_op_defs[] = { { INDEX_op_ext32u_i64, { "r", "r" } }, { INDEX_op_deposit_i64, { "Q", "0", "Q" } }, + { INDEX_op_movcond_i64, { "r", "r", "re", "r", "0" } }, #endif #if TCG_TARGET_REG_BITS == 64 diff --git a/tcg/i386/tcg-target.h b/tcg/i386/tcg-target.h index 504f9534ce..b356d76312 100644 --- a/tcg/i386/tcg-target.h +++ b/tcg/i386/tcg-target.h @@ -86,7 +86,12 @@ typedef enum { #define TCG_TARGET_HAS_nand_i32 0 #define TCG_TARGET_HAS_nor_i32 0 #define TCG_TARGET_HAS_deposit_i32 1 +#if defined(__x86_64__) || defined(__i686__) +/* Use cmov only if the compiler is already doing so. */ +#define TCG_TARGET_HAS_movcond_i32 1 +#else #define TCG_TARGET_HAS_movcond_i32 0 +#endif #if TCG_TARGET_REG_BITS == 64 #define TCG_TARGET_HAS_div2_i64 1 @@ -108,7 +113,7 @@ typedef enum { #define TCG_TARGET_HAS_nand_i64 0 #define TCG_TARGET_HAS_nor_i64 0 #define TCG_TARGET_HAS_deposit_i64 1 -#define TCG_TARGET_HAS_movcond_i64 0 +#define TCG_TARGET_HAS_movcond_i64 1 #endif #define TCG_TARGET_deposit_i32_valid(ofs, len) \ |