diff options
| author | rander <rander.wang@intel.com> | 2017-03-31 14:20:32 +0800 |
|---|---|---|
| committer | Yang Rong <rong.r.yang@intel.com> | 2017-04-17 16:08:49 +0800 |
| commit | d3f8a429505e018f4b4c7cf1fd7eba491657aaf9 (patch) | |
| tree | 1ca0ccbb6ec7edfed6bd1a88664200e39f1c5d63 | |
| parent | e3b4bd1874376bd9cf58b3615b526f6841deb9ba (diff) | |
| download | beignet-d3f8a429505e018f4b4c7cf1fd7eba491657aaf9.tar.gz | |
backend: add double version of hypot
cp from fdlibm and pass the cft after refined
Signed-off-by: rander <rander.wang@intel.com>
Tested-by: Yang Rong <rong.r.yang@intel.com>
| -rw-r--r-- | backend/src/libocl/tmpl/ocl_math_common.tmpl.cl | 65 | ||||
| -rw-r--r-- | backend/src/libocl/tmpl/ocl_math_common.tmpl.h | 1 |
2 files changed, 66 insertions, 0 deletions
diff --git a/backend/src/libocl/tmpl/ocl_math_common.tmpl.cl b/backend/src/libocl/tmpl/ocl_math_common.tmpl.cl index 0cf58005..4dd2caee 100644 --- a/backend/src/libocl/tmpl/ocl_math_common.tmpl.cl +++ b/backend/src/libocl/tmpl/ocl_math_common.tmpl.cl @@ -1444,6 +1444,71 @@ OVERLOADABLE double floor(double x) } } +OVERLOADABLE double hypot(double x, double y) +{ + double a=x,b=y,t1,t2,y1,y2,w; + int j,k,ha,hb; + + ha = __HI(x)&0x7fffffff; /* high word of x */ + hb = __HI(y)&0x7fffffff; /* high word of y */ + if(hb > ha) {a=y;b=x;j=ha; ha=hb;hb=j;} else {a=x;b=y;} + __setHigh(&a, ha); /* a <- |a| */ + __setHigh(&b, hb); /* b <- |b| */ + if((ha-hb)>0x3c00000) {return a+b;} /* x/y > 2**60 */ + k=0; + if(ha > 0x5f300000) { /* a>2**500 */ + if(ha >= 0x7ff00000) { /* Inf or NaN */ + w = a+b; /* for sNaN */ + if(((ha&0xfffff)|__LO(a))==0) w = a; + if(((hb^0x7ff00000)|__LO(b))==0) w = b; + return w; + } + /* scale a and b by 2**-600 */ + ha -= 0x25800000; hb -= 0x25800000; k += 600; + __setHigh(&a, ha); + __setHigh(&b, hb); + } + if(hb < 0x20b00000) { /* b < 2**-500 */ + if(hb <= 0x000fffff) { /* subnormal b or 0 */ + if((hb|(__LO(b)))==0) return a; + t1=0; + __setHigh(&t1, 0x7fd00000); /* t1=2^1022 */ + b *= t1; + a *= t1; + k -= 1022; + } else { /* scale a and b by 2^600 */ + ha += 0x25800000; /* a *= 2^600 */ + hb += 0x25800000; /* b *= 2^600 */ + k -= 600; + __setHigh(&a, ha); + __setHigh(&b, hb); + } + } + /* medium size a and b */ + w = a-b; + if (w>b) { + t1 = 0; + __setHigh(&t1, ha); + t2 = a-t1; + w = sqrt(t1*t1-(b*(-b)-t2*(a+t1))); + } else { + a = a+a; + y1 = 0; + __setHigh(&y1, hb); + y2 = b - y1; + t1 = 0; + __setHigh(&t1, ha+0x00100000); + t2 = a - t1; + w = sqrt(t1*y1-(w*(-w)-(t1*y2+t2*b))); + } + if(k!=0) { + t1 = 1.0; + __setHigh(&t1, __HI(t1) + (k<<20)); + return t1*w; + } else return w; + +} + OVERLOADABLE double log(double x) { double ln2_hi = 6.93147180369123816490e-01, /* 3fe62e42 fee00000 */ diff --git a/backend/src/libocl/tmpl/ocl_math_common.tmpl.h b/backend/src/libocl/tmpl/ocl_math_common.tmpl.h index cc94d4e4..a538b3c1 100644 --- a/backend/src/libocl/tmpl/ocl_math_common.tmpl.h +++ b/backend/src/libocl/tmpl/ocl_math_common.tmpl.h @@ -47,6 +47,7 @@ OVERLOADABLE double floor(double x); OVERLOADABLE double fmax(double a, double b); OVERLOADABLE double fmin(double a, double b); OVERLOADABLE double fmod (double x, double y); +OVERLOADABLE double hypot(double x, double y); OVERLOADABLE double ldexp(double x, int n); OVERLOADABLE double log(double x); OVERLOADABLE double log2(double x); |