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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-08-15 14:04:59 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-08-15 14:05:14 -0700 |
| commit | f59f7adb4a00b7784cab1becdf257366104587b7 (patch) | |
| tree | 42aeecf314d9c19ec4cbc16ed69a01f7475455fa | |
| parent | 6b11a6ad714e7f2bb83556c77d2306e55a94ca54 (diff) | |
| download | glibc-f59f7adb4a00b7784cab1becdf257366104587b7.tar.gz glibc-f59f7adb4a00b7784cab1becdf257366104587b7.tar.xz glibc-f59f7adb4a00b7784cab1becdf257366104587b7.zip | |
x86-64: Align L(SP_RANGE)/L(SP_INF_0) to 8 bytes [BZ #21955]
sysdeps/x86_64/fpu/e_expf.S has
lea L(SP_RANGE)(%rip), %rdx /* load over/underflow bound */
cmpl (%rdx,%rax,4), %ecx /* |x|<under/overflow bound ? */
...
/* Here if |x| is Inf */
lea L(SP_INF_0)(%rip), %rdx /* depending on sign of x: */
movss (%rdx,%rax,4), %xmm0 /* return zero or Inf */
ret
...
.section .rodata.cst8,"aM",@progbits,8
...
.p2align 2
L(SP_RANGE): /* single precision overflow/underflow bounds */
.long 0x42b17217 /* if x>this bound, then result overflows */
.long 0x42cff1b4 /* if x<this bound, then result underflows */
.type L(SP_RANGE), @object
ASM_SIZE_DIRECTIVE(L(SP_RANGE))
.p2align 2
L(SP_INF_0):
.long 0x7f800000 /* single precision Inf */
.long 0 /* single precision zero */
.type L(SP_INF_0), @object
ASM_SIZE_DIRECTIVE(L(SP_INF_0))
Since L(SP_RANGE) and L(SP_INF_0) are in .rodata.cst8 section, they must
be aligned to 8 bytes.
[BZ #21955]
* sysdeps/x86_64/fpu/e_expf.S (L(SP_RANGE)): Aligned to 8 bytes.
(L(SP_INF_0)): Likewise.
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/x86_64/fpu/e_expf.S | 4 |
2 files changed, 8 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog index a1fb5165c1..db3e4b3a92 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2017-08-15 H.J. Lu <hongjiu.lu@intel.com> + + [BZ #21955] + * sysdeps/x86_64/fpu/e_expf.S (L(SP_RANGE)): Aligned to 8 bytes. + (L(SP_INF_0)): Likewise. + 2017-08-15 Florian Weimer <fweimer@redhat.com> * gmon/Makefile (tests-special): Add tst-gmon-prof only if diff --git a/sysdeps/x86_64/fpu/e_expf.S b/sysdeps/x86_64/fpu/e_expf.S index 4fd2bb1fb5..c3bf312c44 100644 --- a/sysdeps/x86_64/fpu/e_expf.S +++ b/sysdeps/x86_64/fpu/e_expf.S @@ -297,14 +297,14 @@ L(DP_P0): /* double precision polynomial coefficient P0 */ .type L(DP_P0), @object ASM_SIZE_DIRECTIVE(L(DP_P0)) - .p2align 2 + .p2align 3 L(SP_RANGE): /* single precision overflow/underflow bounds */ .long 0x42b17217 /* if x>this bound, then result overflows */ .long 0x42cff1b4 /* if x<this bound, then result underflows */ .type L(SP_RANGE), @object ASM_SIZE_DIRECTIVE(L(SP_RANGE)) - .p2align 2 + .p2align 3 L(SP_INF_0): .long 0x7f800000 /* single precision Inf */ .long 0 /* single precision zero */ |