You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
944 B
32 lines
944 B
#include <clc/clc.h>
|
|
#include "math.h"
|
|
#include "../clcmacro.h"
|
|
|
|
_CLC_OVERLOAD _CLC_DEF float logb(float x) {
|
|
int ax = as_int(x) & EXSIGNBIT_SP32;
|
|
float s = -118 - clz(ax);
|
|
float r = (ax >> EXPSHIFTBITS_SP32) - EXPBIAS_SP32;
|
|
r = ax >= PINFBITPATT_SP32 ? as_float(ax) : r;
|
|
r = ax < 0x00800000 ? s : r;
|
|
r = ax == 0 ? as_float(NINFBITPATT_SP32) : r;
|
|
return r;
|
|
}
|
|
|
|
_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, logb, float);
|
|
|
|
#ifdef cl_khr_fp64
|
|
#pragma OPENCL EXTENSION cl_khr_fp64 : enable
|
|
|
|
_CLC_OVERLOAD _CLC_DEF double logb(double x) {
|
|
long ax = as_long(x) & EXSIGNBIT_DP64;
|
|
double s = -1011L - clz(ax);
|
|
double r = (int) (ax >> EXPSHIFTBITS_DP64) - EXPBIAS_DP64;
|
|
r = ax >= PINFBITPATT_DP64 ? as_double(ax) : r;
|
|
r = ax < 0x0010000000000000L ? s : r;
|
|
r = ax == 0L ? as_double(NINFBITPATT_DP64) : r;
|
|
return r;
|
|
}
|
|
|
|
_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, logb, double)
|
|
#endif
|