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-rw-r--r--contrib/llvm-project/compiler-rt/lib/builtins/multc3.c70
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
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+++ b/contrib/llvm-project/compiler-rt/lib/builtins/multc3.c
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+//===-- 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