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GNU C Library master sources branch, master, updated. glibc-2.13-205-g457bddf
- From: drepper at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 20 May 2011 10:35:11 -0000
- Subject: GNU C Library master sources branch, master, updated. glibc-2.13-205-g457bddf
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http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=457bddfc2a8aa8a65b176afb408f0d068a590316
commit 457bddfc2a8aa8a65b176afb408f0d068a590316
Author: Ryan S. Arnold <rsa@us.ibm.com>
Date: Fri May 20 06:34:48 2011 -0400
Prevent Altivec and VSX insns on PowerPC64 when no FPRs or VRs are avail.
(cherry picked from commit 4749a0058b27274a95c5a798e339c7299cdf890e)
Conflicts:
ChangeLog
diff --git a/ChangeLog b/ChangeLog
index 7557fa8..02f4737 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2011-05-18 Ryan S. Arnold <rsa@us.ibm.com>
+
+ * 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.
+
2011-05-19 Andreas Schwab <schwab@redhat.com>
* grp/compat-initgroups.c (__libc_use_alloca): Don't define.
diff --git a/sysdeps/powerpc/powerpc64/Makefile b/sysdeps/powerpc/powerpc64/Makefile
index 78d4f07..136de30 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
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 6 ++++++
sysdeps/powerpc/powerpc64/Makefile | 7 +++++--
2 files changed, 11 insertions(+), 2 deletions(-)
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