Xen devel - Jan 2012 - [PATCH] x86-64: globally use -mno-sse

This eliminates pointless prologue code from functions having variable
argument lists (since that way xmm registers can''t possibly be passed).

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/Rules.mk
+++ b/xen/arch/x86/Rules.mk
@@ -41,7 +41,7 @@ x86_64 := n
 endif
 
 ifeq ($(TARGET_SUBARCH),x86_64)
-CFLAGS += -mno-red-zone -fpic
+CFLAGS += -mno-red-zone -mno-sse -fpic
 CFLAGS += -fno-asynchronous-unwind-tables
 # -fvisibility=hidden reduces -fpic cost, if it''s available
 ifneq ($(call cc-option,$(CC),-fvisibility=hidden,n),n)
--- a/xen/arch/x86/efi/Makefile
+++ b/xen/arch/x86/efi/Makefile
@@ -1,4 +1,4 @@
-CFLAGS += -fshort-wchar -mno-sse
+CFLAGS += -fshort-wchar
 
 obj-y += stub.o
 





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On 12/01/2012 12:42, "Jan Beulich" <JBeulich@suse.com> wrote:
> This eliminates pointless prologue code from functions having variable
> argument lists (since that way xmm registers can''t possibly be
passed).
> 
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
> --- a/xen/arch/x86/Rules.mk
> +++ b/xen/arch/x86/Rules.mk
> @@ -41,7 +41,7 @@ x86_64 := n
>  endif
>  
>  ifeq ($(TARGET_SUBARCH),x86_64)
> -CFLAGS += -mno-red-zone -fpic
> +CFLAGS += -mno-red-zone -mno-sse -fpic
>  CFLAGS += -fno-asynchronous-unwind-tables
>  # -fvisibility=hidden reduces -fpic cost, if it''s available
>  ifneq ($(call cc-option,$(CC),-fvisibility=hidden,n),n)
> --- a/xen/arch/x86/efi/Makefile
> +++ b/xen/arch/x86/efi/Makefile
> @@ -1,4 +1,4 @@
> -CFLAGS += -fshort-wchar -mno-sse
> +CFLAGS += -fshort-wchar
>  
>  obj-y += stub.o
>  
> 
> 
> 
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