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UserspaceEmulator: Correct FSCALES rounding

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We were rounding the wrong way, FSCALE is supposed to trunc internally,
while we were flooring.
Now LibM exponentials and related tests work :^)
This commit is contained in:
Hendiadyoin1 2021-07-23 00:42:33 +02:00 • committed by Linus Groh
parent fa02b46295
commit 8108aaca39
1 changed files with 1 additions and 1 deletions
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Userland/DevTools/UserspaceEmulator/SoftFPU.cpp
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@ -797,7 +797,7 @@ void SoftFPU::FRNDINT(const X86::Instruction&)
void SoftFPU::FSCALE(const X86::Instruction&)
{
// FIXME: set C1 upon stack overflow or if result was rounded
fpu_set(0, fpu_get(0) * powl(2, floorl(fpu_get(1))));
fpu_set(0, fpu_get(0) * powl(2, truncl(fpu_get(1))));
}
void SoftFPU::FSQRT(const X86::Instruction&)