From 33ec460272bc74d968783725f24643ee4e953572 Mon Sep 17 00:00:00 2001 From: "Ryan S. Arnold" Date: Wed, 18 May 2011 15:19:56 -0500 Subject: Prevent Altivec and VSX insns on PowerPC64 when no FPRs or VRs are avail. --- ChangeLog | 6 ++++++ sysdeps/powerpc/powerpc64/Makefile | 7 +++++-- 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/ChangeLog b/ChangeLog index ee2ccdc4f4..6da2761989 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2011-05-18 Ryan S. Arnold + + * sysdeps/powerpc/powerpc64/Makefile (no-special-regs): Add -mno-vsx + and -mno-altivec to prevent the compiler from using Altivec and/or + VSX instructions when the corresponding registers are not available. + 2011-08-18 David Flaherty * sysdeps/ieee754/ldbl-128ibm/s_fmal.c: New file which checks diff --git a/sysdeps/powerpc/powerpc64/Makefile b/sysdeps/powerpc/powerpc64/Makefile index c7cc601ec4..9056e60c4e 100644 --- a/sysdeps/powerpc/powerpc64/Makefile +++ b/sysdeps/powerpc/powerpc64/Makefile @@ -12,7 +12,10 @@ endif # These flags prevent FPU or Altivec registers from being used, # for code called in contexts that is not allowed to touch those registers. -# Stupid GCC requires us to pass all these ridiculous switches. +# Stupid GCC requires us to pass all these ridiculous switches. We need to +# pass the -mno-* switches as well to prevent the compiler from attempting +# to emit altivec or vsx instructions, especially when the registers aren't +# available. no-special-regs := $(sort $(foreach n,40 41 50 51 60 61 62 63 \ $(foreach m,2 3 4 5 6 7 8 9, \ 3$m 4$m 5$m),\ @@ -20,7 +23,7 @@ no-special-regs := $(sort $(foreach n,40 41 50 51 60 61 62 63 \ $(sort $(foreach n,$(foreach m,0 1 2 3 4 5 6 7 8 9,\ $m 1$m 2$m) 30 31,\ -ffixed-v$n)) \ - -ffixed-vrsave -ffixed-vscr + -ffixed-vrsave -ffixed-vscr -mno-altivec -mno-vsx ifeq ($(subdir),csu) sysdep_routines += hp-timing -- cgit v1.2.1