setjmp: optimize longjmp prologues

[musl] / src / math / i386 / log1pf.s

diff --git a/src/math/i386/log1pf.s b/src/math/i386/log1pf.s
index 2680a8a..9f13d95 100644 (file)
--- a/src/math/i386/log1pf.s
+++ b/src/math/i386/log1pf.s
@@ -7,9 +7,20 @@ log1pf:
        flds 4(%esp)
        cmp $0x3e940000,%eax
        ja 1f
+       cmp $0x00800000,%eax
+       jb 2f
        fyl2xp1
+       fstps 4(%esp)
+       flds 4(%esp)
        ret
 1:     fld1
        faddp
        fyl2x
+       fstps 4(%esp)
+       flds 4(%esp)
+       ret
+               # subnormal x, return x with underflow
+2:     fxch
+       fmul %st(1)
+       fstps 4(%esp)
        ret