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constrain temporary register in moveMM according to moveMR's requirements

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This commit is contained in:
Joel Dice 2008-05-18 22:28:47 -06:00
parent f3fb813714
commit 56d8851764
1 changed files with 8 additions and 1 deletions
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9
src/x86.cpp
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@ -845,7 +845,14 @@ moveMM(Context* c, unsigned size, Assembler::Memory* a,
Assembler::Memory* b) Assembler::Memory* b)
{ {
if (BytesPerWord == 8 or size <= 4) { if (BytesPerWord == 8 or size <= 4) {
Assembler::Register tmp(c->client->acquireTemporary()); uint32_t mask;
if (BytesPerWord == 4 and size == 1) {
mask = (1 << rax) | (1 << rcx) | (1 << rdx) | (1 << rbx);
} else {
mask = ~static_cast<uint32_t>(0);
}
Assembler::Register tmp(c->client->acquireTemporary(mask));
moveMR(c, size, a, &tmp); moveMR(c, size, a, &tmp);
moveRM(c, size, &tmp, b); moveRM(c, size, &tmp, b);
c->client->releaseTemporary(tmp.low); c->client->releaseTemporary(tmp.low);