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emit_x64_floating_point: Hardware FMA implementation of FPRSqrtStepFused

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This commit is contained in:
MerryMage 2018-09-12 16:10:18 +01:00
parent 344ee76aba
commit 3caeb62ef1
3 changed files with 76 additions and 3 deletions
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22
tests/A64/a64.cpp
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@ -472,3 +472,25 @@ TEST_CASE("A64: FNEG failed to zero upper", "[a64]") {
REQUIRE(jit.GetVector(28) == Vector{0x79ee7a03980db670, 0});
REQUIRE(FP::FPSR{jit.GetFpsr()}.QC() == false);
}
TEST_CASE("A64: FRSQRTS", "[a64]") {
A64TestEnv env;
Dynarmic::A64::Jit jit{Dynarmic::A64::UserConfig{&env}};
env.code_mem.emplace_back(0x5eb8fcad); // FRSQRTS S13, S5, S24
env.code_mem.emplace_back(0x14000000); // B .
// These particular values result in an intermediate value during
// the calculation that is close to infinity. We want to verify
// that this special case is handled appropriately.
jit.SetPC(0);
jit.SetVector(5, {0xfc6a0206, 0});
jit.SetVector(24, {0xfc6a0206, 0});
jit.SetFpcr(0x00400000);
env.ticks_left = 2;
jit.Run();
REQUIRE(jit.GetVector(13) == Vector{0xff7fffff, 0});
}