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fix compareUnsignedCR, which relied on sign extension in cmplwi, which actually does zero extension; fix use of li argument to instruction format I

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This commit is contained in:
Joel Dice 2009-03-05 18:02:03 -07:00
parent 3e495b8ca5
commit 7d48547f0e
1 changed files with 3 additions and 3 deletions
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6
src/powerpc.cpp
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@ -37,7 +37,7 @@ namespace isa {
// INSTRUCTION FORMATS
inline int D(int op, int rt, int ra, int d) { return op<<26|rt<<21|ra<<16|(d & 0xFFFF); }
inline int DS(int op, int rt, int ra, int ds, int xo) { return op<<26|rt<<21|ra<<16|ds<<2|xo; }
inline int I(int op, int li, int aa, int lk) { return op<<26|li<<2|aa<<1|lk; }
inline int I(int op, int li, int aa, int lk) { return op<<26|(li & 0x3FFFFFC)|aa<<1|lk; }
inline int B(int op, int bo, int bi, int bd, int aa, int lk) { return op<<26|bo<<21|bi<<16|(bd & 0xFFFC)|aa<<1|lk; }
inline int SC(int op, int lev) { return op<<26|lev<<5|2; }
inline int X(int op, int rt, int ra, int rb, int xo, int rc) { return op<<26|rt<<21|ra<<16|rb<<11|xo<<1|rc; }
@ -1223,8 +1223,8 @@ compareUnsignedCR(Context* c, unsigned aSize, Assembler::Constant* a,
unsigned bSize, Assembler::Register* b)
{
assert(c, aSize == 4 and bSize == 4);
if (a->value->resolved() and isInt16(a->value->value())) {
if (a->value->resolved() and (a->value->value() >> 16) == 0) {
issue(c, cmplwi(b->low, a->value->value()));
} else {
Assembler::Register tmp(c->client->acquireTemporary());