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emit_x64_floating_point: Implement accurate fallback for FPMulAdd{32,64}

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This commit is contained in:
MerryMage 2018-07-23 16:23:05 +01:00
parent e199887fbc
commit 0ce11b7b15
3 changed files with 56 additions and 14 deletions
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37
tests/A64/a64.cpp
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@ -334,3 +334,40 @@ TEST_CASE("A64: CNTPCT_EL0", "[a64]") {
REQUIRE(jit.GetRegister(3) == 7);
}
TEST_CASE("A64: FNMSUB 1", "[a64]") {
TestEnv env;
Dynarmic::A64::Jit jit{Dynarmic::A64::UserConfig{&env}};
env.code_mem[0] = 0x1f618a9c; // FNMSUB D28, D20, D1, D2
env.code_mem[1] = 0x14000000; // B .
jit.SetPC(0);
jit.SetVector(20, {0xe73a51346164bd6c, 0x8080000000002b94});
jit.SetVector(1, {0xbf8000007fffffff, 0xffffffff00002b94});
jit.SetVector(2, {0x0000000000000000, 0xc79b271e3f000000});
env.ticks_left = 2;
jit.Run();
REQUIRE(jit.GetVector(28) == Vector{0x66ca513533ee6076, 0x0000000000000000});
}
TEST_CASE("A64: FNMSUB 2", "[a64]") {
TestEnv env;
Dynarmic::A64::Jit jit{Dynarmic::A64::UserConfig{&env}};
env.code_mem[0] = 0x1f2ab88e; // FNMSUB S14, S4, S10, S14
env.code_mem[1] = 0x14000000; // B .
jit.SetPC(0);
jit.SetVector(4, {0x3c9623b101398437, 0x7ff0abcd0ba98d27});
jit.SetVector(10, {0xffbfffff3eaaaaab, 0x3f0000003f8147ae});
jit.SetVector(14, {0x80000000007fffff, 0xe73a513400000000});
jit.SetFpcr(0x00400000);
env.ticks_left = 2;
jit.Run();
REQUIRE(jit.GetVector(14) == Vector{0x0000000080045284, 0x0000000000000000});
}

4
tests/A64/fuzz_with_unicorn.cpp
View file

@ -77,8 +77,6 @@ static u32 GenRandomInst(u64 pc, bool is_last_inst) {
"LDLAR",
// Dynarmic and QEMU currently differ on how the exclusive monitor's address range works.
"STXR", "STLXR", "STXP", "STLXP", "LDXR", "LDAXR", "LDXP", "LDAXP",
// Approximation. Produces inaccurate results.
"FMADD_float", "FMSUB_float", "FNMADD_float", "FNMSUB_float",
};
for (const auto& [fn, bitstring] : list) {
@ -116,8 +114,6 @@ static u32 GenFloatInst(u64 pc, bool is_last_inst) {
const std::vector<std::string> do_not_test {
// QEMU's implementation of FCVT is incorrect
"FCVT_float",
// Approximation. Produces incorrect results.
"FMADD_float", "FMSUB_float", "FNMADD_float", "FNMSUB_float",
// Requires investigation (temporarily disabled).
"FDIV_1", "FDIV_2",
};