From 3ba79b319ef5d47b0d16482a254de7c5c740e415 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ky=C3=B6sti=20M=C3=A4lkki?= Date: Sun, 23 Dec 2018 07:22:56 +0200 Subject: [PATCH] arch/x86: Prevent romcc bootblock from using MMX registers MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Platforms with SSE=y or SSE2=y will invoke romcc with -mcpu=k7. This implicitly enabled romcc to consume MMX registers, if XMM set was consumed first. Explicitly tell romcc not to clobber MMX set. Change-Id: I37f1d6ea01873036712dfbb32bb1dcd5d769e85d Signed-off-by: Kyösti Mälkki Reviewed-on: https://review.coreboot.org/c/30392 Tested-by: build bot (Jenkins) Reviewed-by: Arthur Heymans --- src/arch/x86/Makefile.inc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc index c5cf62549a..0c554b0b80 100644 --- a/src/arch/x86/Makefile.inc +++ b/src/arch/x86/Makefile.inc @@ -143,7 +143,7 @@ $(call src-to-obj,bootblock,$(dir)/bootblock.ld): $(objgenerated)/bootblock.ld bootblock_romccflags := -mcpu=i386 -O2 -D__PRE_RAM__ -D__BOOTBLOCK__ ifeq ($(CONFIG_SSE),y) -bootblock_romccflags := -mcpu=k7 -msse -O2 -D__PRE_RAM__ -D__BOOTBLOCK__ +bootblock_romccflags := -mcpu=k7 -mno-mmx -msse -O2 -D__PRE_RAM__ -D__BOOTBLOCK__ endif # This is a hack in case there are no per chipset linker files.