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fix: improve CMake configuration for 32-bit x86

This commit is contained in:
Kabir08 2026-04-19 18:27:15 +05:30
parent 6e209b9bde
commit 8f8b3b3d0b
1 changed files with 8 additions and 0 deletions
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8
ggml/src/ggml-cpu/CMakeLists.txt
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@ -310,6 +310,14 @@ function(ggml_add_cpu_backend_variant_impl tag_name)
list(APPEND ARCH_DEFINITIONS __BMI2__ GGML_BMI2)
endif()
else ()
# GCC on 32-bit x86 (i386/i686) defaults to x87 scalar FP (80-bit extended
# precision) even when compiling with -mavx2. Whisper's softmax/logit values
# diverge enough from the SSE2 path that the decoder produces garbage tokens.
# Force SSE FP math to match the precision expected by all SSE/AVX codepaths.
if (CMAKE_SIZEOF_VOID_P EQUAL 4 AND
CMAKE_SYSTEM_PROCESSOR MATCHES "^(i[3-6]86|i686)$")
list(APPEND ARCH_FLAGS -mfpmath=sse -msse2)
endif()
if (GGML_NATIVE)
list(APPEND ARCH_FLAGS -march=native)
else ()