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Prevent Altivec and VSX insns on PowerPC64 when no FPRs or VRs are avail.

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(cherry picked from commit 4749a0058b27274a95c5a798e339c7299cdf890e)

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	ChangeLog
This commit is contained in:
Ryan S. Arnold 2011-05-20 06:34:48 -04:00 committed by Ulrich Drepper
parent a4527b51d4
commit 457bddfc2a
2 changed files with 11 additions and 2 deletions
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6
ChangeLog
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@ -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.

7
sysdeps/powerpc/powerpc64/Makefile
View File

@ -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