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implement additional instructions

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This commit is contained in:
Joel Dice 2008-09-27 16:00:58 -06:00
parent 11c2afbf91
commit 965b83303f
1 changed files with 54 additions and 0 deletions
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54
src/x86.cpp
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@ -867,6 +867,22 @@ moveCM(Context* c, unsigned aSize UNUSED, Assembler::Constant* a,
}
}
void
moveZRR(Context* c, unsigned aSize, Assembler::Register* a,
unsigned bSize UNUSED, Assembler::Register* b)
{
switch (aSize) {
case 2:
rex(c);
c->code.append(0x0f);
c->code.append(0xb7);
c->code.append(0xc0 | (b->low << 3) | a->low);
break;
default: abort(c);
}
}
void
swapRR(Context* c, unsigned aSize UNUSED, Assembler::Register* a,
unsigned bSize UNUSED, Assembler::Register* b)
@ -918,6 +934,40 @@ compareCR(Context* c, unsigned aSize, Assembler::Constant* a,
c->client->releaseTemporary(tmp.low);
}
}
void
compareRM(Context* c, unsigned aSize, Assembler::Register* a,
unsigned bSize UNUSED, Assembler::Memory* b)
{
assert(c, aSize == bSize);
assert(c, BytesPerWord == 8 or aSize == 4);
if (BytesPerWord == 8 and aSize == 4) {
moveRR(c, 4, a, 8, a);
}
encode(c, 0x39, a->low, b, true);
}
void
compareCM(Context* c, unsigned aSize UNUSED, Assembler::Constant* a,
unsigned bSize UNUSED, Assembler::Memory* b)
{
assert(c, aSize == bSize);
assert(c, BytesPerWord == 8 or aSize == 4);
int64_t v = a->value->value();
encode(c, isInt8(v) ? 0x83 : 0x81, 7, b, true);
if (isInt8(v)) {
c->code.append(v);
} else if (isInt32(v)) {
c->code.append4(v);
} else {
abort(c);
}
}
void
addCarryRR(Context* c, unsigned size, Assembler::Register* a,
Assembler::Register* b)
@ -1236,10 +1286,14 @@ populateTables(ArchitectureContext* c)
bo[index(Move, A, R)] = CAST2(moveAR);
bo[index(Move, M, M)] = CAST2(moveMM);
bo[index(MoveZ, R, R)] = CAST2(moveZRR);
bo[index(Swap, R, R)] = CAST2(swapRR);
bo[index(Compare, R, R)] = CAST2(compareRR);
bo[index(Compare, C, R)] = CAST2(compareCR);
bo[index(Compare, C, M)] = CAST2(compareCM);
bo[index(Compare, R, M)] = CAST2(compareRM);
bo[index(Add, R, R)] = CAST2(addRR);
bo[index(Add, C, R)] = CAST2(addCR);