Signed-off-by: Lv Meng <meng...@intel.com>
---
backend/src/ocl_stdlib.tmpl.h | 78 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 77 insertions(+), 1 deletion(-)
diff --git a/backend/src/ocl_stdlib.tmpl.h b/backend/src/ocl_stdlib.tmpl.h
index 904904b..4035ae5 100755
--- a/backend/src/ocl_stdlib.tmpl.h
+++ b/backend/src/ocl_stdlib.tmpl.h
@@ -1956,6 +1956,82 @@ INLINE_OVERLOADABLE float __gen_ocl_internal_exp(float
x) {
return y*twom100;
}
}
+INLINE_OVERLOADABLE float __gen_ocl_internal_fmod (float x, float y) {
+ //return x-y*__gen_ocl_rndz(x/y);
+ float one = 1.0;
+ float Zero[2];
+ int n,hx,hy,hz,ix,iy,sx,i;
+ Zero[0] = 0.0;
+ Zero[1] = -0.0;
+ GEN_OCL_GET_FLOAT_WORD(hx,x);
+ GEN_OCL_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[(unsigned)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[(unsigned)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[(unsigned)sx>>31];
+ while(hx<0x00800000) { /* normalize x */
+ hx = hx+hx;
+ iy -= 1;
+ }
+ if(iy>= -126) { /* normalize output */
+ hx = ((hx-0x00800000)|((iy+127)<<23));
+ GEN_OCL_SET_FLOAT_WORD(x,hx|sx);
+ } else { /* subnormal output */
+ n = -126 - iy;
+ hx >>= n;
+ GEN_OCL_SET_FLOAT_WORD(x,hx|sx);
+ x *= one; /* create necessary signal */
+ }
+ return x; /* exact output */
+}
+
// TODO use llvm intrinsics definitions
#define cos native_cos
@@ -1984,7 +2060,7 @@ INLINE_OVERLOADABLE float __gen_ocl_internal_exp(float x)
{
#define copysign __gen_ocl_internal_copysign
#define erf __gen_ocl_internal_erf
#define erfc __gen_ocl_internal_erfc
-
+#define fmod __gen_ocl_internal_fmod
PURE CONST float __gen_ocl_mad(float a, float b, float c);
INLINE_OVERLOADABLE float mad(float a, float b, float c) {
return __gen_ocl_mad(a, b, c);
--
1.7.10.4
_______________________________________________
Beignet mailing list
Beignet@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/beignet
