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[CPU] Remove ATOMIC_EXCHANGE opcode (dead code)

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This commit is contained in:
Herman S.
2026-04-08 00:05:29 +09:00
parent ade7e610bb
commit 4acda223db
7 changed files with 0 additions and 215 deletions
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95
src/xenia/cpu/backend/a64/a64_seq_memory.cc
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@@ -867,101 +867,6 @@ struct MEMSET_I64
EMITTER_OPCODE_TABLE(OPCODE_MEMSET, MEMSET_I64);
// ============================================================================
// OPCODE_ATOMIC_EXCHANGE
// ============================================================================
// Note: src1 is a HOST address (not guest), matching the x64 backend.
struct ATOMIC_EXCHANGE_I8
: Sequence<ATOMIC_EXCHANGE_I8,
I<OPCODE_ATOMIC_EXCHANGE, I8Op, I64Op, I8Op>> {
static void Emit(A64Emitter& e, const EmitArgType& i) {
// src1 is already a host address.
if (i.src1.is_constant) {
e.mov(e.x4, i.src1.constant());
} else {
e.mov(e.x4, i.src1);
}
if (i.src2.is_constant) {
e.mov(e.w0, static_cast<uint64_t>(
static_cast<uint32_t>(i.src2.constant()) & 0xFF));
} else {
e.and_(e.w0, i.src2, 0xFF);
}
if (e.IsFeatureEnabled(kA64EmitLSE)) {
e.swpalb(e.w0, i.dest, ptr(e.x4));
return;
}
auto& retry = e.NewCachedLabel();
e.L(retry);
e.ldaxrb(e.w1, ptr(e.x4));
e.stlxrb(e.w2, e.w0, ptr(e.x4));
e.cbnz(e.w2, retry);
e.mov(i.dest, e.w1);
}
};
struct ATOMIC_EXCHANGE_I16
: Sequence<ATOMIC_EXCHANGE_I16,
I<OPCODE_ATOMIC_EXCHANGE, I16Op, I64Op, I16Op>> {
static void Emit(A64Emitter& e, const EmitArgType& i) {
if (i.src1.is_constant) {
e.mov(e.x4, i.src1.constant());
} else {
e.mov(e.x4, i.src1);
}
if (i.src2.is_constant) {
e.mov(e.w0, static_cast<uint64_t>(
static_cast<uint32_t>(i.src2.constant()) & 0xFFFF));
} else {
e.and_(e.w0, i.src2, 0xFFFF);
}
if (e.IsFeatureEnabled(kA64EmitLSE)) {
e.swpalh(e.w0, i.dest, ptr(e.x4));
return;
}
auto& retry = e.NewCachedLabel();
e.L(retry);
e.ldaxrh(e.w1, ptr(e.x4));
e.stlxrh(e.w2, e.w0, ptr(e.x4));
e.cbnz(e.w2, retry);
e.mov(i.dest, e.w1);
}
};
struct ATOMIC_EXCHANGE_I32
: Sequence<ATOMIC_EXCHANGE_I32,
I<OPCODE_ATOMIC_EXCHANGE, I32Op, I64Op, I32Op>> {
static void Emit(A64Emitter& e, const EmitArgType& i) {
// src1 is a host address (not guest).
if (i.src1.is_constant) {
e.mov(e.x4, i.src1.constant());
} else {
e.mov(e.x4, i.src1);
}
if (i.src2.is_constant) {
e.mov(e.w0,
static_cast<uint64_t>(static_cast<uint32_t>(i.src2.constant())));
} else {
e.mov(e.w0, i.src2);
}
if (e.IsFeatureEnabled(kA64EmitLSE)) {
e.swpal(e.w0, i.dest, ptr(e.x4));
return;
}
auto& retry = e.NewCachedLabel();
e.L(retry);
e.ldaxr(e.w1, ptr(e.x4));
e.stlxr(e.w2, e.w0, ptr(e.x4));
e.cbnz(e.w2, retry);
e.mov(i.dest, e.w1);
}
};
EMITTER_OPCODE_TABLE(OPCODE_ATOMIC_EXCHANGE, ATOMIC_EXCHANGE_I8,
ATOMIC_EXCHANGE_I16, ATOMIC_EXCHANGE_I32);
// ============================================================================
// OPCODE_ATOMIC_COMPARE_EXCHANGE
// ============================================================================