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tcg/ppc: Prefer mask over andi. 

Prefer the instruction that isn't required to modify cr0.

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-10-02 22:41:01 +00:00
parent 5bfd75a35c
commit 1e1df962e3
1 changed files with 10 additions and 10 deletions
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20
tcg/ppc/tcg-target.c
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@ -700,14 +700,14 @@ static void tcg_out_andi32(TCGContext *s, TCGReg dst, TCGReg src, uint32_t c)
{
int mb, me;
if ((c & 0xffff) == c) {
if (mask_operand(c, &mb, &me)) {
tcg_out_rlw(s, RLWINM, dst, src, 0, mb, me);
} else if ((c & 0xffff) == c) {
tcg_out32(s, ANDI | SAI(src, dst, c));
return;
} else if ((c & 0xffff0000) == c) {
tcg_out32(s, ANDIS | SAI(src, dst, c >> 16));
return;
} else if (mask_operand(c, &mb, &me)) {
tcg_out_rlw(s, RLWINM, dst, src, 0, mb, me);
} else {
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R0, c);
tcg_out32(s, AND | SAB(src, dst, TCG_REG_R0));
@ -719,18 +719,18 @@ static void tcg_out_andi64(TCGContext *s, TCGReg dst, TCGReg src, uint64_t c)
int mb, me;
assert(TCG_TARGET_REG_BITS == 64);
if ((c & 0xffff) == c) {
tcg_out32(s, ANDI | SAI(src, dst, c));
return;
} else if ((c & 0xffff0000) == c) {
tcg_out32(s, ANDIS | SAI(src, dst, c >> 16));
return;
} else if (mask64_operand(c, &mb, &me)) {
if (mask64_operand(c, &mb, &me)) {
if (mb == 0) {
tcg_out_rld(s, RLDICR, dst, src, 0, me);
} else {
tcg_out_rld(s, RLDICL, dst, src, 0, mb);
}
} else if ((c & 0xffff) == c) {
tcg_out32(s, ANDI | SAI(src, dst, c));
return;
} else if ((c & 0xffff0000) == c) {
tcg_out32(s, ANDIS | SAI(src, dst, c >> 16));
return;
} else {
tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_R0, c);
tcg_out32(s, AND | SAB(src, dst, TCG_REG_R0));