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s390x: [liftoff] implement AtomicXor

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Change-Id: Ic7ed7938527dcf32d856a965da86a33cd713b83d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2821630
Reviewed-by: Milad Fa <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#73914}
This commit is contained in:
Junliang Yan 2021-04-12 12:17:45 -04:00 committed by Commit Bot
parent 08f4771e6b
commit 71d0a9dde5
1 changed files with 79 additions and 1 deletions
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80
src/wasm/baseline/s390/liftoff-assembler-s390.h
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@ -833,7 +833,85 @@ void LiftoffAssembler::AtomicOr(Register dst_addr, Register offset_reg,
void LiftoffAssembler::AtomicXor(Register dst_addr, Register offset_reg,
uintptr_t offset_imm, LiftoffRegister value,
LiftoffRegister result, StoreType type) {
bailout(kAtomics, "AtomicXor");
Register tmp1 =
GetUnusedRegister(
kGpReg, LiftoffRegList::ForRegs(dst_addr, offset_reg, value, result))
.gp();
Register tmp2 =
GetUnusedRegister(kGpReg, LiftoffRegList::ForRegs(dst_addr, offset_reg,
value, result, tmp1))
.gp();
lay(ip,
MemOperand(dst_addr, offset_reg == no_reg ? r0 : offset_reg, offset_imm));
switch (type.value()) {
case StoreType::kI32Store8:
case StoreType::kI64Store8: {
Label do_again;
bind(&do_again);
LoadU8(tmp1, MemOperand(ip));
XorP(tmp2, tmp1, value.gp());
AtomicCmpExchangeU8(ip, result.gp(), tmp1, tmp2, r0, r1);
b(Condition(4), &do_again);
LoadU8(result.gp(), result.gp());
break;
}
case StoreType::kI32Store16:
case StoreType::kI64Store16: {
Label do_again;
bind(&do_again);
LoadU16(tmp1, MemOperand(ip));
#ifdef V8_TARGET_BIG_ENDIAN
lrvr(tmp2, tmp1);
ShiftRightU32(tmp2, tmp2, Operand(16));
XorP(tmp2, tmp2, value.gp());
lrvr(tmp2, tmp2);
ShiftRightU32(tmp2, tmp2, Operand(16));
#else
XorP(tmp2, tmp1, value.gp());
#endif
AtomicCmpExchangeU16(ip, result.gp(), tmp1, tmp2, r0, r1);
b(Condition(4), &do_again);
LoadU16(result.gp(), result.gp());
break;
}
case StoreType::kI32Store:
case StoreType::kI64Store32: {
Label do_again;
bind(&do_again);
LoadU32(tmp1, MemOperand(ip));
#ifdef V8_TARGET_BIG_ENDIAN
lrvr(tmp2, tmp1);
XorP(tmp2, tmp2, value.gp());
lrvr(tmp2, tmp2);
#else
XorP(tmp2, tmp1, value.gp());
#endif
CmpAndSwap(tmp1, tmp2, MemOperand(ip));
b(Condition(4), &do_again);
LoadU32(result.gp(), tmp1);
break;
}
case StoreType::kI64Store: {
Label do_again;
bind(&do_again);
LoadU64(tmp1, MemOperand(ip));
#ifdef V8_TARGET_BIG_ENDIAN
lrvgr(tmp2, tmp1);
XorP(tmp2, tmp2, value.gp());
lrvgr(tmp2, tmp2);
#else
XorP(tmp2, tmp1, value.gp());
#endif
CmpAndSwap64(tmp1, tmp2, MemOperand(ip));
b(Condition(4), &do_again);
mov(result.gp(), tmp1);
break;
}
default:
UNREACHABLE();
}
}
void LiftoffAssembler::AtomicExchange(Register dst_addr, Register offset_reg,