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GNU C Library master sources branch hjl/pr21955/master created. glibc-2.26-106-g3924556
- From: hjl at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 15 Aug 2017 20:52:58 -0000
- Subject: GNU C Library master sources branch hjl/pr21955/master created. glibc-2.26-106-g3924556
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at 39245565fc0523eece29721c4590639ccebb6145 (commit)
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=39245565fc0523eece29721c4590639ccebb6145
commit 39245565fc0523eece29721c4590639ccebb6145
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Tue Aug 15 10:34:22 2017 -0700
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.
diff --git a/sysdeps/x86_64/fpu/e_expf.S b/sysdeps/x86_64/fpu/e_expf.S
index 4fd2bb1..c3bf312 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 */
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