diff options
Diffstat (limited to 'contrib/compiler-rt/lib/builtins/mulsc3.c')
-rw-r--r-- | contrib/compiler-rt/lib/builtins/mulsc3.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/builtins/mulsc3.c b/contrib/compiler-rt/lib/builtins/mulsc3.c new file mode 100644 index 000000000000..c89cfd247a15 --- /dev/null +++ b/contrib/compiler-rt/lib/builtins/mulsc3.c @@ -0,0 +1,73 @@ +/* ===-- mulsc3.c - Implement __mulsc3 -------------------------------------=== + * + * 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 __mulsc3 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#include "int_lib.h" +#include "int_math.h" + +/* Returns: the product of a + ib and c + id */ + +COMPILER_RT_ABI Fcomplex +__mulsc3(float __a, float __b, float __c, float __d) +{ + float __ac = __a * __c; + float __bd = __b * __d; + float __ad = __a * __d; + float __bc = __b * __c; + Fcomplex 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_copysignf(crt_isinf(__a) ? 1 : 0, __a); + __b = crt_copysignf(crt_isinf(__b) ? 1 : 0, __b); + if (crt_isnan(__c)) + __c = crt_copysignf(0, __c); + if (crt_isnan(__d)) + __d = crt_copysignf(0, __d); + __recalc = 1; + } + if (crt_isinf(__c) || crt_isinf(__d)) + { + __c = crt_copysignf(crt_isinf(__c) ? 1 : 0, __c); + __d = crt_copysignf(crt_isinf(__d) ? 1 : 0, __d); + if (crt_isnan(__a)) + __a = crt_copysignf(0, __a); + if (crt_isnan(__b)) + __b = crt_copysignf(0, __b); + __recalc = 1; + } + if (!__recalc && (crt_isinf(__ac) || crt_isinf(__bd) || + crt_isinf(__ad) || crt_isinf(__bc))) + { + if (crt_isnan(__a)) + __a = crt_copysignf(0, __a); + if (crt_isnan(__b)) + __b = crt_copysignf(0, __b); + if (crt_isnan(__c)) + __c = crt_copysignf(0, __c); + if (crt_isnan(__d)) + __d = crt_copysignf(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; +} |