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- implement xor swap for vec registers

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This commit is contained in:
Magnus Norddahl 2018-12-07 19:30:00 +01:00
parent 0dfb0d8427
commit f17a90ef69
2 changed files with 67 additions and 6 deletions
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41
asmjit/asmjit/x86/x86regalloc.cpp
View file

@ -271,6 +271,22 @@ Error X86RAPass::emitSwapGp(VirtReg* dstReg, VirtReg* srcReg, uint32_t dstPhysId
return kErrorOk;
}
Error X86RAPass::emitSwapVec(VirtReg* dstReg, VirtReg* srcReg, uint32_t dstPhysId, uint32_t srcPhysId, const char* reason) noexcept {
ASMJIT_ASSERT(dstPhysId != Globals::kInvalidRegId);
ASMJIT_ASSERT(srcPhysId != Globals::kInvalidRegId);
ASMJIT_ASSERT(dstPhysId != srcPhysId);
X86Reg a = X86Reg::fromSignature(dstReg->getSignature(), dstPhysId);
X86Reg b = X86Reg::fromSignature(srcReg->getSignature(), srcPhysId);
ASMJIT_PROPAGATE(cc()->emit(X86Inst::kIdXorps, a, b));
if (_emitComments)
cc()->getCursor()->setInlineComment(cc()->_cbDataZone.sformat("[%s] %s, %s", reason, dstReg->getName(), srcReg->getName()));
ASMJIT_PROPAGATE(cc()->emit(X86Inst::kIdXorps, b, a));
ASMJIT_PROPAGATE(cc()->emit(X86Inst::kIdXorps, a, b));
return kErrorOk;
}
Error X86RAPass::emitImmToReg(uint32_t dstTypeId, uint32_t dstPhysId, const Imm* src) noexcept {
ASMJIT_ASSERT(dstPhysId != Globals::kInvalidRegId);
@ -778,6 +794,9 @@ _MoveOrLoad:
if (C == X86Reg::kKindGp) {
self->swapGp(dVReg, sVd);
}
else if (C == X86Reg::kKindVec) {
self->swapVec(dVReg, sVd);
}
else {
self->spill<C>(dVReg);
self->move<C>(sVd, physId);
@ -932,10 +951,13 @@ static ASMJIT_INLINE void X86RAPass_intersectStateVars(X86RAPass* self, X86RASta
didWork = true;
continue;
}
else if (C == X86Reg::kKindGp) {
else if (C == X86Reg::kKindGp || C == X86Reg::kKindVec) {
if (aCell.getState() == VirtReg::kStateReg) {
if (dVReg->getPhysId() != Globals::kInvalidRegId && aVReg->getPhysId() != Globals::kInvalidRegId) {
self->swapGp(dVReg, aVReg);
if (C == X86Reg::kKindGp)
self->swapGp(dVReg, aVReg);
else
self->swapVec(dVReg, aVReg);
didWork = true;
continue;
@ -2787,9 +2809,13 @@ ASMJIT_INLINE void X86VarAlloc::alloc() {
// allocation tasks by a single 'xchg' instruction, swapping
// two registers required by the instruction/node or one register
// required with another non-required.
if (C == X86Reg::kKindGp && aPhysId != Globals::kInvalidRegId) {
// Uses xor swap for Vec registers.
if ((C == X86Reg::kKindGp || C == X86Reg::kKindVec) && aPhysId != Globals::kInvalidRegId) {
TiedReg* bTied = bVReg->_tied;
_context->swapGp(aVReg, bVReg);
if (C == X86Reg::kKindGp)
_context->swapGp(aVReg, bVReg);
else
_context->swapVec(aVReg, bVReg);
aTied->flags |= TiedReg::kRDone;
addTiedDone(C);
@ -3341,8 +3367,11 @@ ASMJIT_INLINE void X86CallAlloc::alloc() {
// allocation tasks by a single 'xchg' instruction, swapping
// two registers required by the instruction/node or one register
// required with another non-required.
if (C == X86Reg::kKindGp && sPhysId != Globals::kInvalidRegId) {
_context->swapGp(aVReg, bVReg);
if ((C == X86Reg::kKindGp || C == X86Reg::kKindVec) && sPhysId != Globals::kInvalidRegId) {
if (C == X86Reg::kKindGp)
_context->swapGp(aVReg, bVReg);
else
_context->swapVec(aVReg, bVReg);
aTied->flags |= TiedReg::kRDone;
addTiedDone(C);

32
asmjit/asmjit/x86/x86regalloc_p.h
View file

@ -327,6 +327,7 @@ public:
Error emitLoad(VirtReg* vreg, uint32_t id, const char* reason);
Error emitSave(VirtReg* vreg, uint32_t id, const char* reason);
Error emitSwapGp(VirtReg* aVReg, VirtReg* bVReg, uint32_t aId, uint32_t bId, const char* reason) noexcept;
Error emitSwapVec(VirtReg* aVReg, VirtReg* bVReg, uint32_t aId, uint32_t bId, const char* reason) noexcept;
Error emitImmToReg(uint32_t dstTypeId, uint32_t dstPhysId, const Imm* src) noexcept;
Error emitImmToStack(uint32_t dstTypeId, const X86Mem* dst, const Imm* src) noexcept;
@ -515,6 +516,37 @@ public:
ASMJIT_X86_CHECK_STATE
}
//! Swap two registers
//!
//! Xor swap on Vec registers.
ASMJIT_INLINE void swapVec(VirtReg* aVReg, VirtReg* bVReg) {
ASMJIT_ASSERT(aVReg != bVReg);
ASMJIT_ASSERT(aVReg->getKind() == X86Reg::kKindVec);
ASMJIT_ASSERT(aVReg->getState() == VirtReg::kStateReg);
ASMJIT_ASSERT(aVReg->getPhysId() != Globals::kInvalidRegId);
ASMJIT_ASSERT(bVReg->getKind() == X86Reg::kKindVec);
ASMJIT_ASSERT(bVReg->getState() == VirtReg::kStateReg);
ASMJIT_ASSERT(bVReg->getPhysId() != Globals::kInvalidRegId);
uint32_t aIndex = aVReg->getPhysId();
uint32_t bIndex = bVReg->getPhysId();
emitSwapVec(aVReg, bVReg, aIndex, bIndex, "Swap");
aVReg->setPhysId(bIndex);
bVReg->setPhysId(aIndex);
_x86State.getListByKind(X86Reg::kKindVec)[aIndex] = bVReg;
_x86State.getListByKind(X86Reg::kKindVec)[bIndex] = aVReg;
uint32_t m = aVReg->isModified() ^ bVReg->isModified();
_x86State._modified.xor_(X86Reg::kKindVec, (m << aIndex) | (m << bIndex));
ASMJIT_X86_CHECK_STATE
}
// --------------------------------------------------------------------------
// [Alloc / Spill]
// --------------------------------------------------------------------------