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HEAD
simplify nan check in sqrt (x86 asm); result of sqrt is never negative
[musl]
/
src
/
math
/
i386
/
sqrt.s
1
.global sqrt
2
.type sqrt,@function
3
sqrt: fldl 4(%esp)
4
fsqrt
5
fstsw %ax
6
sub $12,%esp
7
fld %st(0)
8
fstpt (%esp)
9
mov (%esp),%ecx
10
and $0x7ff,%ecx
11
cmp $0x400,%ecx
12
jnz 1f
13
mov 8(%esp),%cx
14
inc %cx
15
jo 1f
16
and $0x200,%eax
17
sub $0x100,%eax
18
sub %eax,(%esp)
19
fstp %st(0)
20
fldt (%esp)
21
1: add $12,%esp
22
fstpl 4(%esp)
23
fldl 4(%esp)
24
ret