forked from OSchip/llvm-project
286 lines
9.3 KiB
C++
286 lines
9.3 KiB
C++
/*===-- __clang_cuda_complex_builtins - CUDA impls of runtime complex fns ---===
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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*===-----------------------------------------------------------------------===
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*/
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#ifndef __CLANG_CUDA_COMPLEX_BUILTINS
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#define __CLANG_CUDA_COMPLEX_BUILTINS
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// This header defines __muldc3, __mulsc3, __divdc3, and __divsc3. These are
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// libgcc functions that clang assumes are available when compiling c99 complex
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// operations. (These implementations come from libc++, and have been modified
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// to work with CUDA and OpenMP target offloading [in C and C++ mode].)
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#pragma push_macro("__DEVICE__")
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#ifdef __OPENMP_NVPTX__
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#pragma omp declare target
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#define __DEVICE__ __attribute__((noinline, nothrow, cold, weak))
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#else
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#define __DEVICE__ __device__ inline
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#endif
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// To make the algorithms available for C and C++ in CUDA and OpenMP we select
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// different but equivalent function versions. TODO: For OpenMP we currently
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// select the native builtins as the overload support for templates is lacking.
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#if !defined(__OPENMP_NVPTX__)
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#define _ISNANd std::isnan
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#define _ISNANf std::isnan
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#define _ISINFd std::isinf
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#define _ISINFf std::isinf
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#define _ISFINITEd std::isfinite
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#define _ISFINITEf std::isfinite
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#define _COPYSIGNd std::copysign
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#define _COPYSIGNf std::copysign
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#define _SCALBNd std::scalbn
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#define _SCALBNf std::scalbn
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#define _ABSd std::abs
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#define _ABSf std::abs
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#define _LOGBd std::logb
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#define _LOGBf std::logb
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// Rather than pulling in std::max from algorithm everytime, use available ::max.
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#define _fmaxd max
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#define _fmaxf max
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#else
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#ifdef __AMDGCN__
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#define _ISNANd __ocml_isnan_f64
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#define _ISNANf __ocml_isnan_f32
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#define _ISINFd __ocml_isinf_f64
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#define _ISINFf __ocml_isinf_f32
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#define _ISFINITEd __ocml_isfinite_f64
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#define _ISFINITEf __ocml_isfinite_f32
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#define _COPYSIGNd __ocml_copysign_f64
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#define _COPYSIGNf __ocml_copysign_f32
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#define _SCALBNd __ocml_scalbn_f64
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#define _SCALBNf __ocml_scalbn_f32
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#define _ABSd __ocml_fabs_f64
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#define _ABSf __ocml_fabs_f32
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#define _LOGBd __ocml_logb_f64
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#define _LOGBf __ocml_logb_f32
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#define _fmaxd __ocml_fmax_f64
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#define _fmaxf __ocml_fmax_f32
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#else
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#define _ISNANd __nv_isnand
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#define _ISNANf __nv_isnanf
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#define _ISINFd __nv_isinfd
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#define _ISINFf __nv_isinff
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#define _ISFINITEd __nv_isfinited
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#define _ISFINITEf __nv_finitef
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#define _COPYSIGNd __nv_copysign
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#define _COPYSIGNf __nv_copysignf
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#define _SCALBNd __nv_scalbn
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#define _SCALBNf __nv_scalbnf
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#define _ABSd __nv_fabs
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#define _ABSf __nv_fabsf
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#define _LOGBd __nv_logb
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#define _LOGBf __nv_logbf
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#define _fmaxd __nv_fmax
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#define _fmaxf __nv_fmaxf
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#endif
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#endif
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#if defined(__cplusplus)
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extern "C" {
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#endif
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__DEVICE__ double _Complex __muldc3(double __a, double __b, double __c,
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double __d) {
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double __ac = __a * __c;
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double __bd = __b * __d;
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double __ad = __a * __d;
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double __bc = __b * __c;
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double _Complex z;
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__real__(z) = __ac - __bd;
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__imag__(z) = __ad + __bc;
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if (_ISNANd(__real__(z)) && _ISNANd(__imag__(z))) {
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int __recalc = 0;
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if (_ISINFd(__a) || _ISINFd(__b)) {
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__a = _COPYSIGNd(_ISINFd(__a) ? 1 : 0, __a);
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__b = _COPYSIGNd(_ISINFd(__b) ? 1 : 0, __b);
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if (_ISNANd(__c))
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__c = _COPYSIGNd(0, __c);
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if (_ISNANd(__d))
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__d = _COPYSIGNd(0, __d);
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__recalc = 1;
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}
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if (_ISINFd(__c) || _ISINFd(__d)) {
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__c = _COPYSIGNd(_ISINFd(__c) ? 1 : 0, __c);
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__d = _COPYSIGNd(_ISINFd(__d) ? 1 : 0, __d);
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if (_ISNANd(__a))
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__a = _COPYSIGNd(0, __a);
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if (_ISNANd(__b))
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__b = _COPYSIGNd(0, __b);
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__recalc = 1;
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}
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if (!__recalc &&
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(_ISINFd(__ac) || _ISINFd(__bd) || _ISINFd(__ad) || _ISINFd(__bc))) {
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if (_ISNANd(__a))
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__a = _COPYSIGNd(0, __a);
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if (_ISNANd(__b))
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__b = _COPYSIGNd(0, __b);
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if (_ISNANd(__c))
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__c = _COPYSIGNd(0, __c);
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if (_ISNANd(__d))
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__d = _COPYSIGNd(0, __d);
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__recalc = 1;
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}
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if (__recalc) {
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// Can't use std::numeric_limits<double>::infinity() -- that doesn't have
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// a device overload (and isn't constexpr before C++11, naturally).
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__real__(z) = __builtin_huge_val() * (__a * __c - __b * __d);
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__imag__(z) = __builtin_huge_val() * (__a * __d + __b * __c);
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}
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}
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return z;
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}
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__DEVICE__ float _Complex __mulsc3(float __a, float __b, float __c, float __d) {
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float __ac = __a * __c;
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float __bd = __b * __d;
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float __ad = __a * __d;
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float __bc = __b * __c;
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float _Complex z;
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__real__(z) = __ac - __bd;
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__imag__(z) = __ad + __bc;
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if (_ISNANf(__real__(z)) && _ISNANf(__imag__(z))) {
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int __recalc = 0;
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if (_ISINFf(__a) || _ISINFf(__b)) {
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__a = _COPYSIGNf(_ISINFf(__a) ? 1 : 0, __a);
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__b = _COPYSIGNf(_ISINFf(__b) ? 1 : 0, __b);
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if (_ISNANf(__c))
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__c = _COPYSIGNf(0, __c);
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if (_ISNANf(__d))
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__d = _COPYSIGNf(0, __d);
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__recalc = 1;
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}
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if (_ISINFf(__c) || _ISINFf(__d)) {
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__c = _COPYSIGNf(_ISINFf(__c) ? 1 : 0, __c);
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__d = _COPYSIGNf(_ISINFf(__d) ? 1 : 0, __d);
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if (_ISNANf(__a))
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__a = _COPYSIGNf(0, __a);
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if (_ISNANf(__b))
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__b = _COPYSIGNf(0, __b);
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__recalc = 1;
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}
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if (!__recalc &&
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(_ISINFf(__ac) || _ISINFf(__bd) || _ISINFf(__ad) || _ISINFf(__bc))) {
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if (_ISNANf(__a))
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__a = _COPYSIGNf(0, __a);
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if (_ISNANf(__b))
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__b = _COPYSIGNf(0, __b);
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if (_ISNANf(__c))
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__c = _COPYSIGNf(0, __c);
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if (_ISNANf(__d))
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__d = _COPYSIGNf(0, __d);
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__recalc = 1;
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}
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if (__recalc) {
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__real__(z) = __builtin_huge_valf() * (__a * __c - __b * __d);
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__imag__(z) = __builtin_huge_valf() * (__a * __d + __b * __c);
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}
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}
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return z;
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}
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__DEVICE__ double _Complex __divdc3(double __a, double __b, double __c,
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double __d) {
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int __ilogbw = 0;
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// Can't use std::max, because that's defined in <algorithm>, and we don't
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// want to pull that in for every compile. The CUDA headers define
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// ::max(float, float) and ::max(double, double), which is sufficient for us.
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double __logbw = _LOGBd(_fmaxd(_ABSd(__c), _ABSd(__d)));
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if (_ISFINITEd(__logbw)) {
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__ilogbw = (int)__logbw;
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__c = _SCALBNd(__c, -__ilogbw);
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__d = _SCALBNd(__d, -__ilogbw);
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}
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double __denom = __c * __c + __d * __d;
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double _Complex z;
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__real__(z) = _SCALBNd((__a * __c + __b * __d) / __denom, -__ilogbw);
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__imag__(z) = _SCALBNd((__b * __c - __a * __d) / __denom, -__ilogbw);
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if (_ISNANd(__real__(z)) && _ISNANd(__imag__(z))) {
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if ((__denom == 0.0) && (!_ISNANd(__a) || !_ISNANd(__b))) {
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__real__(z) = _COPYSIGNd(__builtin_huge_val(), __c) * __a;
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__imag__(z) = _COPYSIGNd(__builtin_huge_val(), __c) * __b;
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} else if ((_ISINFd(__a) || _ISINFd(__b)) && _ISFINITEd(__c) &&
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_ISFINITEd(__d)) {
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__a = _COPYSIGNd(_ISINFd(__a) ? 1.0 : 0.0, __a);
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__b = _COPYSIGNd(_ISINFd(__b) ? 1.0 : 0.0, __b);
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__real__(z) = __builtin_huge_val() * (__a * __c + __b * __d);
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__imag__(z) = __builtin_huge_val() * (__b * __c - __a * __d);
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} else if (_ISINFd(__logbw) && __logbw > 0.0 && _ISFINITEd(__a) &&
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_ISFINITEd(__b)) {
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__c = _COPYSIGNd(_ISINFd(__c) ? 1.0 : 0.0, __c);
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__d = _COPYSIGNd(_ISINFd(__d) ? 1.0 : 0.0, __d);
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__real__(z) = 0.0 * (__a * __c + __b * __d);
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__imag__(z) = 0.0 * (__b * __c - __a * __d);
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}
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}
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return z;
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}
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__DEVICE__ float _Complex __divsc3(float __a, float __b, float __c, float __d) {
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int __ilogbw = 0;
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float __logbw = _LOGBf(_fmaxf(_ABSf(__c), _ABSf(__d)));
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if (_ISFINITEf(__logbw)) {
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__ilogbw = (int)__logbw;
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__c = _SCALBNf(__c, -__ilogbw);
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__d = _SCALBNf(__d, -__ilogbw);
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}
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float __denom = __c * __c + __d * __d;
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float _Complex z;
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__real__(z) = _SCALBNf((__a * __c + __b * __d) / __denom, -__ilogbw);
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__imag__(z) = _SCALBNf((__b * __c - __a * __d) / __denom, -__ilogbw);
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if (_ISNANf(__real__(z)) && _ISNANf(__imag__(z))) {
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if ((__denom == 0) && (!_ISNANf(__a) || !_ISNANf(__b))) {
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__real__(z) = _COPYSIGNf(__builtin_huge_valf(), __c) * __a;
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__imag__(z) = _COPYSIGNf(__builtin_huge_valf(), __c) * __b;
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} else if ((_ISINFf(__a) || _ISINFf(__b)) && _ISFINITEf(__c) &&
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_ISFINITEf(__d)) {
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__a = _COPYSIGNf(_ISINFf(__a) ? 1 : 0, __a);
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__b = _COPYSIGNf(_ISINFf(__b) ? 1 : 0, __b);
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__real__(z) = __builtin_huge_valf() * (__a * __c + __b * __d);
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__imag__(z) = __builtin_huge_valf() * (__b * __c - __a * __d);
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} else if (_ISINFf(__logbw) && __logbw > 0 && _ISFINITEf(__a) &&
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_ISFINITEf(__b)) {
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__c = _COPYSIGNf(_ISINFf(__c) ? 1 : 0, __c);
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__d = _COPYSIGNf(_ISINFf(__d) ? 1 : 0, __d);
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__real__(z) = 0 * (__a * __c + __b * __d);
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__imag__(z) = 0 * (__b * __c - __a * __d);
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}
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}
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return z;
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}
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#if defined(__cplusplus)
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} // extern "C"
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#endif
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#undef _ISNANd
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#undef _ISNANf
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#undef _ISINFd
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#undef _ISINFf
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#undef _COPYSIGNd
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#undef _COPYSIGNf
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#undef _ISFINITEd
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#undef _ISFINITEf
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#undef _SCALBNd
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#undef _SCALBNf
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#undef _ABSd
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#undef _ABSf
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#undef _LOGBd
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#undef _LOGBf
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#undef _fmaxd
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#undef _fmaxf
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#ifdef __OPENMP_NVPTX__
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#pragma omp end declare target
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#endif
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#pragma pop_macro("__DEVICE__")
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#endif // __CLANG_CUDA_COMPLEX_BUILTINS
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