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fix regression in x86_64 math asm with old binutils

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the implicit-operand form of fucomip is rejected by binutils 2.19 and
perhaps other versions still in use. writing both operands explicitly
fixes the issue. there is no change to the resulting output.

commit a732e80d33b4fd6f510f7cec4f5573ef5d89bc4e was the source of this
regression.
This commit is contained in:
Rich Felker 2015-04-23 06:21:49 -04:00
parent 3aacb54ead
commit 18938c299c
2 changed files with 6 additions and 6 deletions
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6
src/math/x32/exp2l.s
View File

@ -6,7 +6,7 @@ expm1l:
fmulp
movl $0xc2820000,-4(%esp)
flds -4(%esp)
fucomip %st(1)
fucomip %st(1),%st
fld1
jb 1f
# x*log2e <= -65, return -1 without underflow
@ -15,7 +15,7 @@ expm1l:
ret
1: fld %st(1)
fabs
fucomip %st(1)
fucomip %st(1),%st
fstp %st(0)
ja 1f
f2xm1
@ -48,7 +48,7 @@ exp2l:
fld %st(1)
fsub %st(1)
faddp
fucomip %st(1)
fucomip %st(1),%st
je 2f # x - 0x1p63 + 0x1p63 == x
movl $1,(%esp)
flds (%esp) # 0x1p-149

6
src/math/x86_64/exp2l.s
View File

@ -6,7 +6,7 @@ expm1l:
fmulp
movl $0xc2820000,-4(%rsp)
flds -4(%rsp)
fucomip %st(1)
fucomip %st(1),%st
fld1
jb 1f
# x*log2e <= -65, return -1 without underflow
@ -15,7 +15,7 @@ expm1l:
ret
1: fld %st(1)
fabs
fucomip %st(1)
fucomip %st(1),%st
fstp %st(0)
ja 1f
f2xm1
@ -48,7 +48,7 @@ exp2l:
fld %st(1)
fsub %st(1)
faddp
fucomip %st(1)
fucomip %st(1),%st
je 2f # x - 0x1p63 + 0x1p63 == x
movl $1,(%rsp)
flds (%rsp) # 0x1p-149