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Fix a test failure on some i686 systems:
https://github.com/xianyi/OpenBLAS/issues/1575
This patch is a squashed version of these commits:
https://github.com/xianyi/OpenBLAS/pull/1583
diff --git a/kernel/x86/KERNEL.NEHALEM b/kernel/x86/KERNEL.NEHALEM
index 835520ef..65b03ae5 100644
--- a/kernel/x86/KERNEL.NEHALEM
+++ b/kernel/x86/KERNEL.NEHALEM
@@ -1,3 +1 @@
include $(KERNELDIR)/KERNEL.PENRYN
-SSWAPKERNEL = ../arm/swap.c
-DSWAPKERNEL = ../arm/swap.c
diff --git a/kernel/x86/swap.S b/kernel/x86/swap.S
index 54b00b33..e30c2789 100644
--- a/kernel/x86/swap.S
+++ b/kernel/x86/swap.S
@@ -138,6 +138,14 @@
/* INCX != 1 or INCY != 1 */
.L14:
+ cmpl $0, %ebx
+ jne .L141
+ cmpl $0, %ecx
+ jne .L141
+/* INCX == 0 and INCY == 0 */
+ jmp .L27
+
+.L141:
movl %edx, %eax
sarl $2, %eax
jle .L28
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