7e6a73959a
Increase fp16 support to allow clspv to continue to be OpenCL compliant following the update of the OpenCL-CTS adding more testing on math functions and conversions with half. Math functions are implemented by upscaling to fp32 and using the fp32 implementation. It garantees the accuracy required for half-precision float-point by the CTS.
141 lines
4.0 KiB
Common Lisp
141 lines
4.0 KiB
Common Lisp
/*
|
|
* Copyright (c) 2014 Advanced Micro Devices, Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <clc/clc.h>
|
|
#include "config.h"
|
|
#include "../clcmacro.h"
|
|
#include "math.h"
|
|
|
|
_CLC_DEF _CLC_OVERLOAD float __clc_ldexp(float x, int n) {
|
|
|
|
if (!__clc_fp32_subnormals_supported()) {
|
|
|
|
// This treats subnormals as zeros
|
|
int i = as_int(x);
|
|
int e = (i >> 23) & 0xff;
|
|
int m = i & 0x007fffff;
|
|
int s = i & 0x80000000;
|
|
int v = add_sat(e, n);
|
|
v = clamp(v, 0, 0xff);
|
|
int mr = e == 0 | v == 0 | v == 0xff ? 0 : m;
|
|
int c = e == 0xff;
|
|
mr = c ? m : mr;
|
|
int er = c ? e : v;
|
|
er = e ? er : e;
|
|
return as_float( s | (er << 23) | mr );
|
|
}
|
|
|
|
/* supports denormal values */
|
|
const int multiplier = 24;
|
|
float val_f;
|
|
uint val_ui;
|
|
uint sign;
|
|
int exponent;
|
|
val_ui = as_uint(x);
|
|
sign = val_ui & 0x80000000;
|
|
val_ui = val_ui & 0x7fffffff;/* remove the sign bit */
|
|
int val_x = val_ui;
|
|
|
|
exponent = val_ui >> 23; /* get the exponent */
|
|
int dexp = exponent;
|
|
|
|
/* denormal support */
|
|
int fbh = 127 - (as_uint((float)(as_float(val_ui | 0x3f800000) - 1.0f)) >> 23);
|
|
int dexponent = 25 - fbh;
|
|
uint dval_ui = (( (val_ui << fbh) & 0x007fffff) | (dexponent << 23));
|
|
int ex = dexponent + n - multiplier;
|
|
dexponent = ex;
|
|
uint val = sign | (ex << 23) | (dval_ui & 0x007fffff);
|
|
int ex1 = dexponent + multiplier;
|
|
ex1 = -ex1 +25;
|
|
dval_ui = (((dval_ui & 0x007fffff )| 0x800000) >> ex1);
|
|
dval_ui = dexponent > 0 ? val :dval_ui;
|
|
dval_ui = dexponent > 254 ? 0x7f800000 :dval_ui; /*overflow*/
|
|
dval_ui = dexponent < -multiplier ? 0 : dval_ui; /*underflow*/
|
|
dval_ui = dval_ui | sign;
|
|
val_f = as_float(dval_ui);
|
|
|
|
exponent += n;
|
|
|
|
val = sign | (exponent << 23) | (val_ui & 0x007fffff);
|
|
ex1 = exponent + multiplier;
|
|
ex1 = -ex1 +25;
|
|
val_ui = (((val_ui & 0x007fffff )| 0x800000) >> ex1);
|
|
val_ui = exponent > 0 ? val :val_ui;
|
|
val_ui = exponent > 254 ? 0x7f800000 :val_ui; /*overflow*/
|
|
val_ui = exponent < -multiplier ? 0 : val_ui; /*underflow*/
|
|
val_ui = val_ui | sign;
|
|
|
|
val_ui = dexp == 0? dval_ui : val_ui;
|
|
val_f = as_float(val_ui);
|
|
|
|
val_f = isnan(x) | isinf(x) | val_x == 0 ? x : val_f;
|
|
return val_f;
|
|
}
|
|
|
|
#ifdef cl_khr_fp64
|
|
|
|
#pragma OPENCL EXTENSION cl_khr_fp64 : enable
|
|
|
|
_CLC_DEF _CLC_OVERLOAD double __clc_ldexp(double x, int n) {
|
|
long l = as_ulong(x);
|
|
int e = (l >> 52) & 0x7ff;
|
|
long s = l & 0x8000000000000000;
|
|
|
|
ulong ux = as_ulong(x * 0x1.0p+53);
|
|
int de = ((int)(ux >> 52) & 0x7ff) - 53;
|
|
int c = e == 0;
|
|
e = c ? de: e;
|
|
|
|
ux = c ? ux : l;
|
|
|
|
int v = e + n;
|
|
v = clamp(v, -0x7ff, 0x7ff);
|
|
|
|
ux &= ~EXPBITS_DP64;
|
|
|
|
double mr = as_double(ux | ((ulong)(v+53) << 52));
|
|
mr = mr * 0x1.0p-53;
|
|
|
|
mr = v > 0 ? as_double(ux | ((ulong)v << 52)) : mr;
|
|
|
|
mr = v == 0x7ff ? as_double(s | PINFBITPATT_DP64) : mr;
|
|
mr = v < -53 ? as_double(s) : mr;
|
|
|
|
mr = ((n == 0) | isinf(x) | (x == 0) ) ? x : mr;
|
|
return mr;
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef cl_khr_fp16
|
|
|
|
#pragma OPENCL EXTENSION cl_khr_fp16 : enable
|
|
|
|
_CLC_OVERLOAD _CLC_DEF half __clc_ldexp(half x, int n) {
|
|
return (half)__clc_ldexp((float)x, n);
|
|
}
|
|
|
|
_CLC_BINARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, half, __clc_ldexp, half, int);
|
|
|
|
#endif
|