Commit 1cf776776 for llama.cpp

commit 1cf7767765b872806e1bb74cfb55614f4334f02f
Author: Ploo <239304139+xinitrcn1@users.noreply.github.com>
Date:   Sun Oct 11 12:24:41 2026 +0000

    cpu: fix AVX2 CPUs not using F16C when available (#30270)

diff --git a/ggml/src/ggml-cpu/simd-mappings.h b/ggml/src/ggml-cpu/simd-mappings.h
index f351e8127..fb53ecdf4 100644
--- a/ggml/src/ggml-cpu/simd-mappings.h
+++ b/ggml/src/ggml-cpu/simd-mappings.h
@@ -140,6 +140,14 @@ extern float ggml_table_f32_ue4m3[1 << 8];
 #define GGML_CPU_UE4M3_TO_FP32(x) ggml_ue4m3_to_fp32(x)
 #endif

+// Pre AVX512 CPUs (AVX2 with F16C, such as i5-8th gen or i7-4790)
+// do not produce codegen as checks below don't test for __F16C__
+// but this check does.
+#if defined(__F16C__)
+#define GGML_CPU_FP16_TO_FP32(x) GGML_CPU_COMPUTE_FP16_TO_FP32(x)
+#define GGML_CPU_FP32_TO_FP16(x) GGML_CPU_COMPUTE_FP32_TO_FP16(x)
+#endif
+
 // On ARM NEON, it's quicker to directly convert x -> x instead of calling into ggml_lookup_fp16_to_fp32,
 // so we define GGML_CPU_FP16_TO_FP32 and GGML_CPU_FP32_TO_FP16 elsewhere for NEON.
 // This is also true for POWER9.