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-rw-r--r--contrib/llvm-project/compiler-rt/lib/builtins/divxc3.c55
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diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/divxc3.c b/contrib/llvm-project/compiler-rt/lib/builtins/divxc3.c
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+++ b/contrib/llvm-project/compiler-rt/lib/builtins/divxc3.c
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+//===-- divxc3.c - Implement __divxc3 -------------------------------------===//
+//
+// 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 __divxc3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#if !_ARCH_PPC
+
+#include "int_lib.h"
+#include "int_math.h"
+
+// Returns: the quotient of (a + ib) / (c + id)
+
+COMPILER_RT_ABI Lcomplex __divxc3(long double __a, long double __b,
+ long double __c, long double __d) {
+ int __ilogbw = 0;
+ long double __logbw = crt_logbl(crt_fmaxl(crt_fabsl(__c), crt_fabsl(__d)));
+ if (crt_isfinite(__logbw)) {
+ __ilogbw = (int)__logbw;
+ __c = crt_scalbnl(__c, -__ilogbw);
+ __d = crt_scalbnl(__d, -__ilogbw);
+ }
+ long double __denom = __c * __c + __d * __d;
+ Lcomplex z;
+ COMPLEX_REAL(z) = crt_scalbnl((__a * __c + __b * __d) / __denom, -__ilogbw);
+ COMPLEX_IMAGINARY(z) =
+ crt_scalbnl((__b * __c - __a * __d) / __denom, -__ilogbw);
+ if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z))) {
+ if ((__denom == 0) && (!crt_isnan(__a) || !crt_isnan(__b))) {
+ COMPLEX_REAL(z) = crt_copysignl(CRT_INFINITY, __c) * __a;
+ COMPLEX_IMAGINARY(z) = crt_copysignl(CRT_INFINITY, __c) * __b;
+ } else if ((crt_isinf(__a) || crt_isinf(__b)) && crt_isfinite(__c) &&
+ crt_isfinite(__d)) {
+ __a = crt_copysignl(crt_isinf(__a) ? 1 : 0, __a);
+ __b = crt_copysignl(crt_isinf(__b) ? 1 : 0, __b);
+ COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c + __b * __d);
+ COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__b * __c - __a * __d);
+ } else if (crt_isinf(__logbw) && __logbw > 0 && crt_isfinite(__a) &&
+ crt_isfinite(__b)) {
+ __c = crt_copysignl(crt_isinf(__c) ? 1 : 0, __c);
+ __d = crt_copysignl(crt_isinf(__d) ? 1 : 0, __d);
+ COMPLEX_REAL(z) = 0 * (__a * __c + __b * __d);
+ COMPLEX_IMAGINARY(z) = 0 * (__b * __c - __a * __d);
+ }
+ }
+ return z;
+}
+
+#endif