first commit of the new libm!

[musl] / src / math / e_fmodf.c

diff --git a/src/math/e_fmodf.c b/src/math/e_fmodf.c
deleted file mode 100644 (file)
index fe86cb0..0000000
--- a/src/math/e_fmodf.c
+++ /dev/null
@@ -1,101 +0,0 @@
-/* e_fmodf.c -- float version of e_fmod.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
- */
-
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-/*
- * fmodf(x,y)
- * Return x mod y in exact arithmetic
- * Method: shift and subtract
- */
-
-#include <math.h>
-#include "math_private.h"
-
-static const float one = 1.0, Zero[] = {0.0, -0.0,};
-
-float
-fmodf(float x, float y)
-{
-        int32_t n,hx,hy,hz,ix,iy,sx,i;
-
-        GET_FLOAT_WORD(hx,x);
-        GET_FLOAT_WORD(hy,y);
-        sx = hx&0x80000000;             /* sign of x */
-        hx ^=sx;                /* |x| */
-        hy &= 0x7fffffff;       /* |y| */
-
-    /* purge off exception values */
-        if(hy==0||(hx>=0x7f800000)||            /* y=0,or x not finite */
-           (hy>0x7f800000))                     /* or y is NaN */
-            return (x*y)/(x*y);
-        if(hx<hy) return x;                     /* |x|<|y| return x */
-        if(hx==hy)
-            return Zero[(uint32_t)sx>>31];     /* |x|=|y| return x*0*/
-
-    /* determine ix = ilogb(x) */
-        if(hx<0x00800000) {     /* subnormal x */
-            for (ix = -126,i=(hx<<8); i>0; i<<=1) ix -=1;
-        } else ix = (hx>>23)-127;
-
-    /* determine iy = ilogb(y) */
-        if(hy<0x00800000) {     /* subnormal y */
-            for (iy = -126,i=(hy<<8); i>=0; i<<=1) iy -=1;
-        } else iy = (hy>>23)-127;
-
-    /* set up {hx,lx}, {hy,ly} and align y to x */
-        if(ix >= -126)
-            hx = 0x00800000|(0x007fffff&hx);
-        else {          /* subnormal x, shift x to normal */
-            n = -126-ix;
-            hx = hx<<n;
-        }
-        if(iy >= -126)
-            hy = 0x00800000|(0x007fffff&hy);
-        else {          /* subnormal y, shift y to normal */
-            n = -126-iy;
-            hy = hy<<n;
-        }
-
-    /* fix point fmod */
-        n = ix - iy;
-        while(n--) {
-            hz=hx-hy;
-            if(hz<0){hx = hx+hx;}
-            else {
-                if(hz==0)               /* return sign(x)*0 */
-                    return Zero[(uint32_t)sx>>31];
-                hx = hz+hz;
-            }
-        }
-        hz=hx-hy;
-        if(hz>=0) {hx=hz;}
-
-    /* convert back to floating value and restore the sign */
-        if(hx==0)                       /* return sign(x)*0 */
-            return Zero[(uint32_t)sx>>31];
-        while(hx<0x00800000) {          /* normalize x */
-            hx = hx+hx;
-            iy -= 1;
-        }
-        if(iy>= -126) {         /* normalize output */
-            hx = ((hx-0x00800000)|((iy+127)<<23));
-            SET_FLOAT_WORD(x,hx|sx);
-        } else {                /* subnormal output */
-            n = -126 - iy;
-            hx >>= n;
-            SET_FLOAT_WORD(x,hx|sx);
-            x *= one;           /* create necessary signal */
-        }
-        return x;               /* exact output */
-}