From 94e053ac10599235bc9920f3a19e373078a6364a Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Sat, 11 Apr 2026 19:27:31 +0200
Subject: [PATCH] Work around miscompilation of the AVX512 ?GEMM kernels by
 Windows LLVM

---
 kernel/x86_64/KERNEL.SKYLAKEX | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/kernel/x86_64/KERNEL.SKYLAKEX b/kernel/x86_64/KERNEL.SKYLAKEX
index 7e946ef2ea..32ea75b902 100644
--- a/kernel/x86_64/KERNEL.SKYLAKEX
+++ b/kernel/x86_64/KERNEL.SKYLAKEX
@@ -1,7 +1,12 @@
 include $(KERNELDIR)/KERNEL.HASWELL
 
+ifeq ($(C_COMPILER)$(OS_WINDOWS), CLANG1)
+SGEMMKERNEL    = sgemm_kernel_16x4_skylakex.S
+STRMMKERNEL    = sgemm_kernel_16x4_skylakex.S
+else
 SGEMMKERNEL    =  sgemm_kernel_16x4_skylakex_3.c
 STRMMKERNEL    =  sgemm_kernel_16x4_skylakex_2.c
+endif
 SGEMMINCOPY    =  ../generic/gemm_ncopy_16.c
 SGEMMITCOPY    =  sgemm_tcopy_16_skylakex.c
 SGEMMONCOPY    =  sgemm_ncopy_4_skylakex.c
@@ -20,8 +25,13 @@ SGEMM_SMALL_K_B0_TN = sgemm_small_kernel_tn_skylakex.c
 SGEMM_SMALL_K_TT = sgemm_small_kernel_tt_skylakex.c
 SGEMM_SMALL_K_B0_TT = sgemm_small_kernel_tt_skylakex.c
 
+ifeq ($(C_COMPILER)$(OS_WINDOWS), CLANG1)
+DGEMMKERNEL    =  dgemm_kernel_16x2_skylakex.S
+DTRMMKERNEL    =  dgemm_kernel_16x2_skylakex.S
+else
 DGEMMKERNEL    =  dgemm_kernel_16x2_skylakex.c
 DTRMMKERNEL    =  dgemm_kernel_16x2_skylakex.c
+endif
 DGEMMINCOPY    =  ../generic/gemm_ncopy_16.c
 DGEMMITCOPY    =  dgemm_tcopy_16_skylakex.c
 DGEMMONCOPY    =  ../generic/gemm_ncopy_2.c
@@ -41,8 +51,13 @@ DGEMM_SMALL_K_B0_TT = dgemm_small_kernel_tt_skylakex.c
 SGEMM_BETA = sgemm_beta_skylakex.c
 DGEMM_BETA = dgemm_beta_skylakex.c
 
+ifeq ($(C_COMPILER)$(OS_WINDOWS), CLANG1)
+CGEMMKERNEL    =  cgemm_kernel_8x2_haswell.c
+ZGEMMKERNEL    =  zgemm_kernel_4x2_haswell.c
+else
 CGEMMKERNEL    =  cgemm_kernel_8x2_skylakex.c
 ZGEMMKERNEL    =  zgemm_kernel_4x2_skylakex.c
+endif
 
 CASUMKERNEL = casum.c
 ZASUMKERNEL = zasum.c