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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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39
src/xenia/cpu/testing/backend_integration_test.cc
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@@ -646,45 +646,6 @@ TEST_CASE("SET_NJM_OFF", "[backend]") {
#endif
}
// =============================================================================
// Atomic Exchange I32
// =============================================================================
// Tests that AtomicExchange correctly swaps a value in memory and returns
// the old value.
// NOTE: OPCODE_ATOMIC_EXCHANGE uses a HOST address (not guest), per the
// x64 backend comment: "the address we use here is a real, host address!"
TEST_CASE("ATOMIC_EXCHANGE_I32", "[backend]") {
TestFunction test([](HIRBuilder& b) {
// r[4] holds the host address directly.
auto addr = LoadGPR(b, 4);
auto new_val = b.Truncate(LoadGPR(b, 5), hir::INT32_TYPE);
auto old_val = b.AtomicExchange(addr, new_val);
StoreGPR(b, 3, b.ZeroExtend(old_val, hir::INT64_TYPE));
b.Return();
});
// Allocate guest memory and compute the host pointer.
uint32_t guest_addr = test.memory->SystemHeapAlloc(4);
REQUIRE(guest_addr != 0);
auto* host_ptr = test.memory->TranslateVirtual(guest_addr);
test.Run(
[&](PPCContext* ctx) {
*reinterpret_cast<uint32_t*>(host_ptr) = 0xAABBCCDD;
// Pass the HOST address in r[4].
ctx->r[4] = reinterpret_cast<uint64_t>(host_ptr);
ctx->r[5] = 0x11223344;
},
[&](PPCContext* ctx) {
// r[3] should have the old value.
REQUIRE(static_cast<uint32_t>(ctx->r[3]) == 0xAABBCCDD);
// Memory should now have the new value.
REQUIRE(*reinterpret_cast<uint32_t*>(host_ptr) == 0x11223344);
});
test.memory->SystemHeapFree(guest_addr);
}
// =============================================================================
// DOT_PRODUCT_3 — inline NEON dot product of first 3 vector elements
// =============================================================================