diff options
| author | Richard Henderson <rth@twiddle.net> | 2009-12-10 13:43:58 -0800 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2009-12-13 21:26:26 +0100 |
| commit | 87d98f9551d264c5a19ab4d2ded56d6dd9294060 (patch) | |
| tree | 10a40dab96957728618e3c526f5ac55b699ba0b5 /target-alpha | |
| parent | 806991da3ab4b4a09720e0bd09d4bb7e06d594b0 (diff) | |
target-alpha: Expand zap/zapnot with immediate inline.
The vast majority of zap instructions have an immediate operand,
since zapnot is the canonical method to zero-extend from u16 or u32.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-alpha')
| -rw-r--r-- | target-alpha/translate.c | 61 |
1 files changed, 59 insertions, 2 deletions
diff --git a/target-alpha/translate.c b/target-alpha/translate.c index 4f923bb42..1388ce645 100644 --- a/target-alpha/translate.c +++ b/target-alpha/translate.c @@ -507,6 +507,65 @@ FCMOV(cmpfge) FCMOV(cmpfle) FCMOV(cmpfgt) +/* Implement zapnot with an immediate operand, which expands to some + form of immediate AND. This is a basic building block in the + definition of many of the other byte manipulation instructions. */ +static inline void gen_zapnoti(int ra, int rc, uint8_t lit) +{ + uint64_t mask; + int i; + + switch (lit) { + case 0x00: + tcg_gen_movi_i64(cpu_ir[rc], 0); + break; + case 0x01: + tcg_gen_ext8u_i64(cpu_ir[rc], cpu_ir[ra]); + break; + case 0x03: + tcg_gen_ext16u_i64(cpu_ir[rc], cpu_ir[ra]); + break; + case 0x0f: + tcg_gen_ext32u_i64(cpu_ir[rc], cpu_ir[ra]); + break; + case 0xff: + tcg_gen_mov_i64(cpu_ir[rc], cpu_ir[ra]); + break; + default: + for (mask = i = 0; i < 8; ++i) { + if ((lit >> i) & 1) + mask |= 0xffull << (i * 8); + } + tcg_gen_andi_i64 (cpu_ir[rc], cpu_ir[ra], mask); + break; + } +} + +static inline void gen_zapnot(int ra, int rb, int rc, int islit, uint8_t lit) +{ + if (unlikely(rc == 31)) + return; + else if (unlikely(ra == 31)) + tcg_gen_movi_i64(cpu_ir[rc], 0); + else if (islit) + gen_zapnoti(ra, rc, lit); + else + gen_helper_zapnot (cpu_ir[rc], cpu_ir[ra], cpu_ir[rb]); +} + +static inline void gen_zap(int ra, int rb, int rc, int islit, uint8_t lit) +{ + if (unlikely(rc == 31)) + return; + else if (unlikely(ra == 31)) + tcg_gen_movi_i64(cpu_ir[rc], 0); + else if (islit) + gen_zapnoti(ra, rc, ~lit); + else + gen_helper_zap (cpu_ir[rc], cpu_ir[ra], cpu_ir[rb]); +} + + /* EXTWH, EXTWH, EXTLH, EXTQH */ static inline void gen_ext_h(void(*tcg_gen_ext_i64)(TCGv t0, TCGv t1), int ra, int rb, int rc, int islit, uint8_t lit) @@ -598,8 +657,6 @@ ARITH3(mskwl) ARITH3(inswl) ARITH3(mskll) ARITH3(insll) -ARITH3(zap) -ARITH3(zapnot) ARITH3(mskql) ARITH3(insql) ARITH3(mskwh) |