diff options
Diffstat (limited to 'sysdeps/s390/fpu/s_llroundl.c')
| -rw-r--r-- | sysdeps/s390/fpu/s_llroundl.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/s390/fpu/s_llroundl.c b/sysdeps/s390/fpu/s_llroundl.c new file mode 100644 index 0000000000..58976cd5c5 --- /dev/null +++ b/sysdeps/s390/fpu/s_llroundl.c @@ -0,0 +1,43 @@ +/* llroundl() - S390 version. + Copyright (C) 2019 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#if defined __s390x__ && defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT +/* We only support s390x as on s390 a long long int refers to a register pair + of two 4byte registers instead of a 8byte register which is produced by the + instruction. + Note: On s390 this instruction would only be used if build with -mzarch. */ +# include <math.h> +# include <math_private.h> +# include <libm-alias-ldouble.h> + +long long int +__llroundl (_Float128 x) +{ + long long int y; + /* The z196 zarch "convert to fixed" (cgxbra) instruction is rounding + x to the nearest integer with "ties away from 0" rounding mode + (M3-field: 1) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("cgxbra %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); + return y; +} +libm_alias_ldouble (__llround, llround) + +#else +# include <sysdeps/ieee754/ldbl-128/s_llroundl.c> +#endif |