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Rewrite i386 backend as hand-written assembly

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Replaces the C fallback (borrowed from PowerPC) with dedicated i386
assembly for all nine kernels, matching the amd64/arm64 convention.
Fixes two real bugs found and verified on physical Pentium 4 hardware:
scalar FP silently running on x87 instead of SSE2, and fm_int_math
calling __udivdi3 on every iteration of the highest-weighted test
because the C compiler didn't know its 0xdeadbeef divisor fits in 32
bits. Real-hardware SINGLECORE/MULTICORE scores go from 425/448 to
539/581.
This commit is contained in:
owen
2026-07-18 04:35:03 -05:00
parent 136b417cf8
commit 357e6f0d6d
6 changed files with 1370 additions and 38 deletions
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src/main.c
+1 -1
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@@ -42,7 +42,7 @@
#ifndef FM_API_BASE_URL
# define FM_API_BASE_URL "https://fossbench.net"
#endif
#define FM_VERSION "0.1.3-hotfix4"
#define FM_VERSION "0.1.4"
/* ---------- platform identification (for the banner only) ---------- */