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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>
This commit is contained in:
Richard Henderson 2009-12-10 13:43:58 -08:00 committed by Aurelien Jarno
parent 806991da3a
commit 87d98f9551
1 changed files with 59 additions and 2 deletions
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61
target-alpha/translate.c
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@ -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)