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fix regression in x86_64 math asm with old binutils

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 a732e80d33 was the source of this
regression.
master
Rich Felker 11 years ago
parent
commit
18938c299c
  1. 6
      src/math/x32/exp2l.s
  2. 6
      src/math/x86_64/exp2l.s

6
src/math/x32/exp2l.s

@ -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

@ -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

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