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Diffstat (limited to 'contrib/llvm-project/compiler-rt/lib/builtins/multc3.c')
-rw-r--r-- | contrib/llvm-project/compiler-rt/lib/builtins/multc3.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/multc3.c b/contrib/llvm-project/compiler-rt/lib/builtins/multc3.c new file mode 100644 index 000000000000..a89832f0e883 --- /dev/null +++ b/contrib/llvm-project/compiler-rt/lib/builtins/multc3.c @@ -0,0 +1,70 @@ +//===-- multc3.c - Implement __multc3 -------------------------------------===// +// +// 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 +// +//===----------------------------------------------------------------------===// +// +// This file implements __multc3 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#define QUAD_PRECISION +#include "fp_lib.h" +#include "int_lib.h" +#include "int_math.h" + +#if defined(CRT_HAS_128BIT) && defined(CRT_HAS_F128) + +// Returns: the product of a + ib and c + id + +COMPILER_RT_ABI Qcomplex __multc3(fp_t a, fp_t b, fp_t c, fp_t d) { + fp_t ac = a * c; + fp_t bd = b * d; + fp_t ad = a * d; + fp_t bc = b * c; + Qcomplex z; + COMPLEXTF_REAL(z) = ac - bd; + COMPLEXTF_IMAGINARY(z) = ad + bc; + if (crt_isnan(COMPLEXTF_REAL(z)) && crt_isnan(COMPLEXTF_IMAGINARY(z))) { + int recalc = 0; + if (crt_isinf(a) || crt_isinf(b)) { + a = crt_copysigntf(crt_isinf(a) ? 1 : 0, a); + b = crt_copysigntf(crt_isinf(b) ? 1 : 0, b); + if (crt_isnan(c)) + c = crt_copysigntf(0, c); + if (crt_isnan(d)) + d = crt_copysigntf(0, d); + recalc = 1; + } + if (crt_isinf(c) || crt_isinf(d)) { + c = crt_copysigntf(crt_isinf(c) ? 1 : 0, c); + d = crt_copysigntf(crt_isinf(d) ? 1 : 0, d); + if (crt_isnan(a)) + a = crt_copysigntf(0, a); + if (crt_isnan(b)) + b = crt_copysigntf(0, b); + recalc = 1; + } + if (!recalc && + (crt_isinf(ac) || crt_isinf(bd) || crt_isinf(ad) || crt_isinf(bc))) { + if (crt_isnan(a)) + a = crt_copysigntf(0, a); + if (crt_isnan(b)) + b = crt_copysigntf(0, b); + if (crt_isnan(c)) + c = crt_copysigntf(0, c); + if (crt_isnan(d)) + d = crt_copysigntf(0, d); + recalc = 1; + } + if (recalc) { + COMPLEXTF_REAL(z) = CRT_INFINITY * (a * c - b * d); + COMPLEXTF_IMAGINARY(z) = CRT_INFINITY * (a * d + b * c); + } + } + return z; +} + +#endif |