mirror of
https://github.com/ziglang/zig.git
synced 2024-11-28 16:12:33 +00:00
190 lines
7.4 KiB
C++
Vendored
190 lines
7.4 KiB
C++
Vendored
/*===-- __clang_cuda_complex_builtins - CUDA impls of runtime complex fns ---===
|
|
*
|
|
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
* See https://llvm.org/LICENSE.txt for license information.
|
|
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
*
|
|
*===-----------------------------------------------------------------------===
|
|
*/
|
|
|
|
#ifndef __CLANG_CUDA_COMPLEX_BUILTINS
|
|
#define __CLANG_CUDA_COMPLEX_BUILTINS
|
|
|
|
// This header defines __muldc3, __mulsc3, __divdc3, and __divsc3. These are
|
|
// libgcc functions that clang assumes are available when compiling c99 complex
|
|
// operations. (These implementations come from libc++, and have been modified
|
|
// to work with CUDA.)
|
|
|
|
extern "C" inline __device__ double _Complex __muldc3(double __a, double __b,
|
|
double __c, double __d) {
|
|
double __ac = __a * __c;
|
|
double __bd = __b * __d;
|
|
double __ad = __a * __d;
|
|
double __bc = __b * __c;
|
|
double _Complex z;
|
|
__real__(z) = __ac - __bd;
|
|
__imag__(z) = __ad + __bc;
|
|
if (std::isnan(__real__(z)) && std::isnan(__imag__(z))) {
|
|
int __recalc = 0;
|
|
if (std::isinf(__a) || std::isinf(__b)) {
|
|
__a = std::copysign(std::isinf(__a) ? 1 : 0, __a);
|
|
__b = std::copysign(std::isinf(__b) ? 1 : 0, __b);
|
|
if (std::isnan(__c))
|
|
__c = std::copysign(0, __c);
|
|
if (std::isnan(__d))
|
|
__d = std::copysign(0, __d);
|
|
__recalc = 1;
|
|
}
|
|
if (std::isinf(__c) || std::isinf(__d)) {
|
|
__c = std::copysign(std::isinf(__c) ? 1 : 0, __c);
|
|
__d = std::copysign(std::isinf(__d) ? 1 : 0, __d);
|
|
if (std::isnan(__a))
|
|
__a = std::copysign(0, __a);
|
|
if (std::isnan(__b))
|
|
__b = std::copysign(0, __b);
|
|
__recalc = 1;
|
|
}
|
|
if (!__recalc && (std::isinf(__ac) || std::isinf(__bd) ||
|
|
std::isinf(__ad) || std::isinf(__bc))) {
|
|
if (std::isnan(__a))
|
|
__a = std::copysign(0, __a);
|
|
if (std::isnan(__b))
|
|
__b = std::copysign(0, __b);
|
|
if (std::isnan(__c))
|
|
__c = std::copysign(0, __c);
|
|
if (std::isnan(__d))
|
|
__d = std::copysign(0, __d);
|
|
__recalc = 1;
|
|
}
|
|
if (__recalc) {
|
|
// Can't use std::numeric_limits<double>::infinity() -- that doesn't have
|
|
// a device overload (and isn't constexpr before C++11, naturally).
|
|
__real__(z) = __builtin_huge_valf() * (__a * __c - __b * __d);
|
|
__imag__(z) = __builtin_huge_valf() * (__a * __d + __b * __c);
|
|
}
|
|
}
|
|
return z;
|
|
}
|
|
|
|
extern "C" inline __device__ float _Complex __mulsc3(float __a, float __b,
|
|
float __c, float __d) {
|
|
float __ac = __a * __c;
|
|
float __bd = __b * __d;
|
|
float __ad = __a * __d;
|
|
float __bc = __b * __c;
|
|
float _Complex z;
|
|
__real__(z) = __ac - __bd;
|
|
__imag__(z) = __ad + __bc;
|
|
if (std::isnan(__real__(z)) && std::isnan(__imag__(z))) {
|
|
int __recalc = 0;
|
|
if (std::isinf(__a) || std::isinf(__b)) {
|
|
__a = std::copysign(std::isinf(__a) ? 1 : 0, __a);
|
|
__b = std::copysign(std::isinf(__b) ? 1 : 0, __b);
|
|
if (std::isnan(__c))
|
|
__c = std::copysign(0, __c);
|
|
if (std::isnan(__d))
|
|
__d = std::copysign(0, __d);
|
|
__recalc = 1;
|
|
}
|
|
if (std::isinf(__c) || std::isinf(__d)) {
|
|
__c = std::copysign(std::isinf(__c) ? 1 : 0, __c);
|
|
__d = std::copysign(std::isinf(__d) ? 1 : 0, __d);
|
|
if (std::isnan(__a))
|
|
__a = std::copysign(0, __a);
|
|
if (std::isnan(__b))
|
|
__b = std::copysign(0, __b);
|
|
__recalc = 1;
|
|
}
|
|
if (!__recalc && (std::isinf(__ac) || std::isinf(__bd) ||
|
|
std::isinf(__ad) || std::isinf(__bc))) {
|
|
if (std::isnan(__a))
|
|
__a = std::copysign(0, __a);
|
|
if (std::isnan(__b))
|
|
__b = std::copysign(0, __b);
|
|
if (std::isnan(__c))
|
|
__c = std::copysign(0, __c);
|
|
if (std::isnan(__d))
|
|
__d = std::copysign(0, __d);
|
|
__recalc = 1;
|
|
}
|
|
if (__recalc) {
|
|
__real__(z) = __builtin_huge_valf() * (__a * __c - __b * __d);
|
|
__imag__(z) = __builtin_huge_valf() * (__a * __d + __b * __c);
|
|
}
|
|
}
|
|
return z;
|
|
}
|
|
|
|
extern "C" inline __device__ double _Complex __divdc3(double __a, double __b,
|
|
double __c, double __d) {
|
|
int __ilogbw = 0;
|
|
// Can't use std::max, because that's defined in <algorithm>, and we don't
|
|
// want to pull that in for every compile. The CUDA headers define
|
|
// ::max(float, float) and ::max(double, double), which is sufficient for us.
|
|
double __logbw = std::logb(max(std::abs(__c), std::abs(__d)));
|
|
if (std::isfinite(__logbw)) {
|
|
__ilogbw = (int)__logbw;
|
|
__c = std::scalbn(__c, -__ilogbw);
|
|
__d = std::scalbn(__d, -__ilogbw);
|
|
}
|
|
double __denom = __c * __c + __d * __d;
|
|
double _Complex z;
|
|
__real__(z) = std::scalbn((__a * __c + __b * __d) / __denom, -__ilogbw);
|
|
__imag__(z) = std::scalbn((__b * __c - __a * __d) / __denom, -__ilogbw);
|
|
if (std::isnan(__real__(z)) && std::isnan(__imag__(z))) {
|
|
if ((__denom == 0.0) && (!std::isnan(__a) || !std::isnan(__b))) {
|
|
__real__(z) = std::copysign(__builtin_huge_valf(), __c) * __a;
|
|
__imag__(z) = std::copysign(__builtin_huge_valf(), __c) * __b;
|
|
} else if ((std::isinf(__a) || std::isinf(__b)) && std::isfinite(__c) &&
|
|
std::isfinite(__d)) {
|
|
__a = std::copysign(std::isinf(__a) ? 1.0 : 0.0, __a);
|
|
__b = std::copysign(std::isinf(__b) ? 1.0 : 0.0, __b);
|
|
__real__(z) = __builtin_huge_valf() * (__a * __c + __b * __d);
|
|
__imag__(z) = __builtin_huge_valf() * (__b * __c - __a * __d);
|
|
} else if (std::isinf(__logbw) && __logbw > 0.0 && std::isfinite(__a) &&
|
|
std::isfinite(__b)) {
|
|
__c = std::copysign(std::isinf(__c) ? 1.0 : 0.0, __c);
|
|
__d = std::copysign(std::isinf(__d) ? 1.0 : 0.0, __d);
|
|
__real__(z) = 0.0 * (__a * __c + __b * __d);
|
|
__imag__(z) = 0.0 * (__b * __c - __a * __d);
|
|
}
|
|
}
|
|
return z;
|
|
}
|
|
|
|
extern "C" inline __device__ float _Complex __divsc3(float __a, float __b,
|
|
float __c, float __d) {
|
|
int __ilogbw = 0;
|
|
float __logbw = std::logb(max(std::abs(__c), std::abs(__d)));
|
|
if (std::isfinite(__logbw)) {
|
|
__ilogbw = (int)__logbw;
|
|
__c = std::scalbn(__c, -__ilogbw);
|
|
__d = std::scalbn(__d, -__ilogbw);
|
|
}
|
|
float __denom = __c * __c + __d * __d;
|
|
float _Complex z;
|
|
__real__(z) = std::scalbn((__a * __c + __b * __d) / __denom, -__ilogbw);
|
|
__imag__(z) = std::scalbn((__b * __c - __a * __d) / __denom, -__ilogbw);
|
|
if (std::isnan(__real__(z)) && std::isnan(__imag__(z))) {
|
|
if ((__denom == 0) && (!std::isnan(__a) || !std::isnan(__b))) {
|
|
__real__(z) = std::copysign(__builtin_huge_valf(), __c) * __a;
|
|
__imag__(z) = std::copysign(__builtin_huge_valf(), __c) * __b;
|
|
} else if ((std::isinf(__a) || std::isinf(__b)) && std::isfinite(__c) &&
|
|
std::isfinite(__d)) {
|
|
__a = std::copysign(std::isinf(__a) ? 1 : 0, __a);
|
|
__b = std::copysign(std::isinf(__b) ? 1 : 0, __b);
|
|
__real__(z) = __builtin_huge_valf() * (__a * __c + __b * __d);
|
|
__imag__(z) = __builtin_huge_valf() * (__b * __c - __a * __d);
|
|
} else if (std::isinf(__logbw) && __logbw > 0 && std::isfinite(__a) &&
|
|
std::isfinite(__b)) {
|
|
__c = std::copysign(std::isinf(__c) ? 1 : 0, __c);
|
|
__d = std::copysign(std::isinf(__d) ? 1 : 0, __d);
|
|
__real__(z) = 0 * (__a * __c + __b * __d);
|
|
__imag__(z) = 0 * (__b * __c - __a * __d);
|
|
}
|
|
}
|
|
return z;
|
|
}
|
|
|
|
#endif // __CLANG_CUDA_COMPLEX_BUILTINS
|