diff options
Diffstat (limited to 'winsup/mingw/mingwex/math/frexpl.S')
| -rw-r--r-- | winsup/mingw/mingwex/math/frexpl.S | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/math/frexpl.S b/winsup/mingw/mingwex/math/frexpl.S new file mode 100644 index 000000000..2b691c87f --- /dev/null +++ b/winsup/mingw/mingwex/math/frexpl.S @@ -0,0 +1,71 @@ +/* + Cephes Math Library Release 2.7: May, 1998 + Copyright 1984, 1987, 1988, 1992, 1998 by Stephen L. Moshier + + Extracted from floorl.387 for use in libmingwex.a by + Danny Smith <dannysmith@users.sourceforge.net> + 2002-06-20 +*/ + +/* + * frexpl(long double x, int* expnt) extracts the exponent from x. + * It returns an integer power of two to expnt and the significand + * between 0.5 and 1 to y. Thus x = y * 2**expn. + */ + .align 2 +.globl _frexpl +_frexpl: + pushl %ebp + movl %esp,%ebp + subl $24,%esp + pushl %esi + pushl %ebx + fldt 8(%ebp) + movl 20(%ebp),%ebx + fld %st(0) + fstpt -12(%ebp) + leal -4(%ebp),%ecx + movw -4(%ebp),%dx + andl $32767,%edx + jne L25 + fldz + fucompp + fnstsw %ax + andb $68,%ah + xorb $64,%ah + jne L21 + movl $0,(%ebx) + fldz + jmp L24 + .align 2,0x90 + .align 2,0x90 +L21: + fldt -12(%ebp) + fadd %st(0),%st + fstpt -12(%ebp) + decl %edx + movw (%ecx),%si + andl $32767,%esi + jne L22 + cmpl $-66,%edx + jg L21 +L22: + addl %esi,%edx + jmp L19 + .align 2,0x90 +L25: + fstp %st(0) +L19: + addl $-16382,%edx + movl %edx,(%ebx) + movw (%ecx),%ax + andl $-32768,%eax + orl $16382,%eax + movw %ax,(%ecx) + fldt -12(%ebp) +L24: + leal -32(%ebp),%esp + popl %ebx + popl %esi + leave + ret |