From 2ff20521f4905fd02d450c1aa3fbbcd951a4bafe Mon Sep 17 00:00:00 2001 From: Doug Gilmore Date: Sun, 5 Aug 2012 14:40:22 -0700 Subject: [PATCH 2/2] X8664 -m32 FP compilation mode change when compiling with GCC. When compiling with GCC at 32, add -mfpmath=sse -msse2, which prevents i387 FP instructions from being generated, otherwise the values for probabilities and frequencies can easily diverge between the 32 and 64 bit builds of the compiler. --- osprey/linux/make/gcommondefs | 11 ++++++++++- 1 files changed, 10 insertions(+), 1 deletions(-) diff --git a/osprey/linux/make/gcommondefs b/osprey/linux/make/gcommondefs index 90fa681..e596a08 100644 --- a/osprey/linux/make/gcommondefs +++ b/osprey/linux/make/gcommondefs @@ -1,7 +1,7 @@ # -*- Makefile -*- # # -# Copyright (C) 2009 Advanced Micro Devices, Inc. All Rights Reserved. +# Copyright (C) 2009, 2012 Advanced Micro Devices, Inc. All Rights Reserved. # # Copyright (C) 2000, 2001 Silicon Graphics, Inc. All Rights Reserved. # @@ -200,6 +200,15 @@ ifeq ($(BUILD_ARCH), IA32) CCNAME += -m32 C++NAME += -m32 F90 += -m32 + ifeq ($(BUILD_COMPILER), GNU) + # Adding -mfpmath=sse -msse, to prevent compiler built + # 32 or 64 bit from producing different code in GRA. + # Note that -ffloat-store should be just as effective + # but -mfpmath=sse -msse produces better code. + CCNAME += -mfpmath=sse -msse2 + C++NAME += -mfpmath=sse -msse2 + F90 += -mfpmath=sse -msse2 + endif endif ifeq ($(BUILD_ARCH), X8664) -- 1.7.4.5