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implement various compare and branch instructions

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This commit is contained in:
Joel Dice 2009-02-28 12:36:02 -07:00
parent f22ce3f996
commit f8d7bea7e8
1 changed files with 72 additions and 6 deletions
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78
src/powerpc.cpp
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@ -123,6 +123,8 @@ inline int bctrl() { return bcctr(20, 0, 1); }
inline int blr() { return bclr(20, 0, 0); }
inline int blt(int i) { return bc(12, 0, i, 0); }
inline int bgt(int i) { return bc(12, 1, i, 0); }
inline int bge(int i) { return bc(4, 0, i, 0); }
inline int ble(int i) { return bc(4, 1, i, 0); }
inline int be(int i) { return bc(12, 2, i, 0); }
inline int cmpw(int ra, int rb) { return cmp(0, ra, rb); }
inline int cmplw(int ra, int rb) { return cmpl(0, ra, rb); }
@ -983,20 +985,40 @@ void
compareRR(Context* c, unsigned aSize, Assembler::Register* a,
unsigned bSize, Assembler::Register* b)
{
assert(c, aSize == 4);
assert(c, bSize == 4);
assert(c, aSize == 4 and bSize == 4);
issue(c, cmpw(a->low, b->low));
issue(c, cmpw(b->low, a->low));
}
void
compareCR(Context* c, unsigned aSize, Assembler::Constant* a,
unsigned bSize, Assembler::Register* b)
{
assert(c, aSize == 4 and bSize == 4);
Assembler::Register tmp(c->client->acquireTemporary());
moveCR(c, aSize, a, bSize, &tmp);
compareRR(c, bSize, &tmp, bSize, b);
}
void
compareRM(Context* c, unsigned aSize, Assembler::Register* a,
unsigned bSize, Assembler::Memory* b)
{
assert(c, aSize == 4 and bSize == 4);
Assembler::Register tmp(c->client->acquireTemporary());
moveMR(c, bSize, b, bSize, &tmp);
compareRR(c, aSize, a, bSize, &tmp);
}
void
compareUnsignedRR(Context* c, unsigned aSize, Assembler::Register* a,
unsigned bSize, Assembler::Register* b)
{
assert(c, aSize == 4);
assert(c, bSize == 4);
assert(c, aSize == 4 and bSize == 4);
issue(c, cmplw(a->low, b->low));
issue(c, cmplw(b->low, a->low));
}
void
@ -1168,6 +1190,44 @@ jumpIfEqualC(Context* c, unsigned size UNUSED, Assembler::Constant* target)
issue(c, be(0));
}
void
jumpIfGreaterC(Context* c, unsigned size UNUSED, Assembler::Constant* target)
{
assert(c, size == BytesPerWord);
appendOffsetTask(c, target->value, offset(c), true);
issue(c, bgt(0));
}
void
jumpIfGreaterOrEqualC(Context* c, unsigned size UNUSED,
Assembler::Constant* target)
{
assert(c, size == BytesPerWord);
appendOffsetTask(c, target->value, offset(c), true);
issue(c, bge(0));
}
void
jumpIfLessC(Context* c, unsigned size UNUSED, Assembler::Constant* target)
{
assert(c, size == BytesPerWord);
appendOffsetTask(c, target->value, offset(c), true);
issue(c, blt(0));
}
void
jumpIfLessOrEqualC(Context* c, unsigned size UNUSED,
Assembler::Constant* target)
{
assert(c, size == BytesPerWord);
appendOffsetTask(c, target->value, offset(c), true);
issue(c, ble(0));
}
void
return_(Context* c)
{
@ -1200,6 +1260,10 @@ populateTables(ArchitectureContext* c)
uo[index(Jump, C)] = CAST1(jumpC);
uo[index(JumpIfEqual, C)] = CAST1(jumpIfEqualC);
uo[index(JumpIfGreater, C)] = CAST1(jumpIfGreaterC);
uo[index(JumpIfGreaterOrEqual, C)] = CAST1(jumpIfGreaterOrEqualC);
uo[index(JumpIfLess, C)] = CAST1(jumpIfLessC);
uo[index(JumpIfLessOrEqual, C)] = CAST1(jumpIfLessOrEqualC);
uo[index(Call, C)] = CAST1(callC);
uo[index(Call, R)] = CAST1(callR);
@ -1215,6 +1279,8 @@ populateTables(ArchitectureContext* c)
bo[index(Move, A, R)] = CAST2(moveAR);
bo[index(Compare, R, R)] = CAST2(compareRR);
bo[index(Compare, C, R)] = CAST2(compareCR);
bo[index(Compare, R, M)] = CAST2(compareRM);
to[index(Add, R)] = CAST3(addR);
to[index(Add, C)] = CAST3(addC);