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Add a generic version of __divtc3.c for long double complex division. 

Mark the unit test as applying to all platforms.

llvm-svn: 253831
This commit is contained in:
Joerg Sonnenberger 2015-11-22 19:13:49 +00:00
parent 806c42a747
commit 47174a5a2c
3 changed files with 62 additions and 10 deletions
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1
compiler-rt/lib/builtins/CMakeLists.txt
View File

@ -41,6 +41,7 @@ set(GENERIC_SOURCES
divsc3.c
divsf3.c
divsi3.c
divtc3.c
divti3.c
divtf3.c
divxc3.c

60
compiler-rt/lib/builtins/divtc3.c Normal file
View File

@ -0,0 +1,60 @@
/*===-- divtc3.c - Implement __divtc3 -------------------------------------===
*
* The LLVM Compiler Infrastructure
*
* This file is dual licensed under the MIT and the University of Illinois Open
* Source Licenses. See LICENSE.TXT for details.
*
* ===----------------------------------------------------------------------===
*
* This file implements __divtc3 for the compiler_rt library.
*
*===----------------------------------------------------------------------===
*/
#include "int_lib.h"
#include "int_math.h"
/* Returns: the quotient of (a + ib) / (c + id) */
COMPILER_RT_ABI long double _Complex
__divtc3(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;
long double _Complex z;
__real__ z = crt_scalbnl((__a * __c + __b * __d) / __denom, -__ilogbw);
__imag__ z = crt_scalbnl((__b * __c - __a * __d) / __denom, -__ilogbw);
if (crt_isnan(__real__ z) && crt_isnan(__imag__ z))
{
if ((__denom == 0.0) && (!crt_isnan(__a) || !crt_isnan(__b)))
{
__real__ z = crt_copysignl(CRT_INFINITY, __c) * __a;
__imag__ 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 : 0.0, __a);
__b = crt_copysignl(crt_isinf(__b) ? 1.0 : 0.0, __b);
__real__ z = CRT_INFINITY * (__a * __c + __b * __d);
__imag__ z = CRT_INFINITY * (__b * __c - __a * __d);
}
else if (crt_isinf(__logbw) && __logbw > 0.0 &&
crt_isfinite(__a) && crt_isfinite(__b))
{
__c = crt_copysignl(crt_isinf(__c) ? 1.0 : 0.0, __c);
__d = crt_copysignl(crt_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;
}

11
compiler-rt/test/builtins/Unit/divtc3_test.c
View File

@ -13,8 +13,6 @@
#include <stdio.h>
#if _ARCH_PPC
#include "int_lib.h"
#include <math.h>
#include <complex.h>
@ -358,11 +356,8 @@ long double x[][2] =
};
#endif
int main()
{
#if _ARCH_PPC
const unsigned N = sizeof(x) / sizeof(x[0]);
unsigned i, j;
for (i = 0; i < N; ++i)
@ -373,11 +368,7 @@ int main()
return 1;
}
}
// printf("No errors found.\n");
#else
printf("skipped\n");
#endif
// printf("No errors found.\n");
return 0;
}