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[common/cpu_detect] Remove SSE/SSE2/FMA4/AVX_VNNI detection (#3979)
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Removes Eden's own feature detection for SSE, SSE2, FMA4 and AVX_VNNI, in order to clean up code and make the function slightly lighter. They are all unused and I have specific reasons for their removal:
- SSE/SSE2 are always true for x64
- FMA4 is a deprecated AMD exclusive extension, replaced by the regular FMA and was logged here as "FMA" for no reason
- AVX_VNNI simply does not seem applicable for Eden (but can still be checked for through Xbyak's feature detection if necessary)

Co-authored-by: RedBlackAka <140876408+RedBlackAka@users.noreply.github.com>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3979
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
This commit is contained in:
RedBlackAka 2026-05-20 19:11:09 +02:00 • committed by crueter
parent feb8c5f88e
commit 2a66b40267
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GPG key ID: 425ACD2D4830EBC6
4 changed files with 5 additions and 12 deletions
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6
src/common/x64/cpu_detect.cpp
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@ -106,8 +106,6 @@ static CPUCaps Detect() {
// Detect family and other miscellaneous features
if (max_std_fn >= 1) {
__cpuid(cpu_id, 0x00000001);
caps.sse = Common::Bit<25>(cpu_id[3]);
caps.sse2 = Common::Bit<26>(cpu_id[3]);
caps.sse3 = Common::Bit<0>(cpu_id[2]);
caps.pclmulqdq = Common::Bit<1>(cpu_id[2]);
caps.ssse3 = Common::Bit<9>(cpu_id[2]);
@ -150,9 +148,6 @@ static CPUCaps Detect() {
caps.waitpkg = Common::Bit<5>(cpu_id[2]);
caps.gfni = Common::Bit<8>(cpu_id[2]);
__cpuidex(cpu_id, 0x00000007, 0x00000001);
caps.avx_vnni = caps.avx && Common::Bit<4>(cpu_id[0]);
}
}
@ -170,7 +165,6 @@ static CPUCaps Detect() {
// Check for more features
__cpuid(cpu_id, 0x80000001);
caps.lzcnt = Common::Bit<5>(cpu_id[2]);
caps.fma4 = Common::Bit<16>(cpu_id[2]);
caps.monitorx = Common::Bit<29>(cpu_id[2]);
}