x86: Add optimized popcnt variants

[karo-tx-linux.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0eacb1ffb42135b02435fa2f0a1897eca651a7dd..89d8c54cdd37c406585ba3de8eab515c0ccdc266 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -238,6 +238,11 @@ config X86_32_LAZY_GS
        def_bool y
        depends on X86_32 && !CC_STACKPROTECTOR
 
+config ARCH_HWEIGHT_CFLAGS
+       string
+       default "-fcall-saved-ecx -fcall-saved-edx" if X86_32
+       default "-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 -fcall-saved-r11" if X86_64
+
 config KTIME_SCALAR
        def_bool X86_32
 source "init/Kconfig"