mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
fa20edc44d
- Remove most __ASSEMBLER__ __LINKER__ ifdefs - Rename libc/intrin/bits.h to libc/serialize.h - Block pthread cancelation in fchmodat() polyfill - Remove `clang-format off` statements in third_party
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/* ===-- muldc3.c - Implement __muldc3 -------------------------------------===
|
|
*
|
|
* 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 __muldc3 for the compiler_rt library.
|
|
*
|
|
* ===----------------------------------------------------------------------===
|
|
*/
|
|
|
|
__static_yoink("huge_compiler_rt_license");
|
|
|
|
#include "third_party/compiler_rt/int_lib.h"
|
|
#include "third_party/compiler_rt/int_math.h"
|
|
|
|
/* Returns: the product of a + ib and c + id */
|
|
|
|
COMPILER_RT_ABI Dcomplex
|
|
__muldc3(double __a, double __b, double __c, double __d)
|
|
{
|
|
double __ac = __a * __c;
|
|
double __bd = __b * __d;
|
|
double __ad = __a * __d;
|
|
double __bc = __b * __c;
|
|
Dcomplex z;
|
|
COMPLEX_REAL(z) = __ac - __bd;
|
|
COMPLEX_IMAGINARY(z) = __ad + __bc;
|
|
if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z)))
|
|
{
|
|
int __recalc = 0;
|
|
if (crt_isinf(__a) || crt_isinf(__b))
|
|
{
|
|
__a = crt_copysign(crt_isinf(__a) ? 1 : 0, __a);
|
|
__b = crt_copysign(crt_isinf(__b) ? 1 : 0, __b);
|
|
if (crt_isnan(__c))
|
|
__c = crt_copysign(0, __c);
|
|
if (crt_isnan(__d))
|
|
__d = crt_copysign(0, __d);
|
|
__recalc = 1;
|
|
}
|
|
if (crt_isinf(__c) || crt_isinf(__d))
|
|
{
|
|
__c = crt_copysign(crt_isinf(__c) ? 1 : 0, __c);
|
|
__d = crt_copysign(crt_isinf(__d) ? 1 : 0, __d);
|
|
if (crt_isnan(__a))
|
|
__a = crt_copysign(0, __a);
|
|
if (crt_isnan(__b))
|
|
__b = crt_copysign(0, __b);
|
|
__recalc = 1;
|
|
}
|
|
if (!__recalc && (crt_isinf(__ac) || crt_isinf(__bd) ||
|
|
crt_isinf(__ad) || crt_isinf(__bc)))
|
|
{
|
|
if (crt_isnan(__a))
|
|
__a = crt_copysign(0, __a);
|
|
if (crt_isnan(__b))
|
|
__b = crt_copysign(0, __b);
|
|
if (crt_isnan(__c))
|
|
__c = crt_copysign(0, __c);
|
|
if (crt_isnan(__d))
|
|
__d = crt_copysign(0, __d);
|
|
__recalc = 1;
|
|
}
|
|
if (__recalc)
|
|
{
|
|
COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c - __b * __d);
|
|
COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__a * __d + __b * __c);
|
|
}
|
|
}
|
|
return z;
|
|
}
|