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Diffstat (limited to 'sysdeps/powerpc/powerpc64/power6x/fpu/s_llround.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/power6x/fpu/s_llround.S | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/power6x/fpu/s_llround.S b/sysdeps/powerpc/powerpc64/power6x/fpu/s_llround.S new file mode 100644 index 0000000000..149feaf965 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/power6x/fpu/s_llround.S @@ -0,0 +1,55 @@ +/* llround function. POWER6x PowerPC64 version. + Copyright (C) 2006 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <math_ldbl_opt.h> + +/* long long [r3] llround (float x [fp1]) + IEEE 1003.1 llround function. IEEE specifies "round to the nearest + integer value, rounding halfway cases away from zero, regardless of + the current rounding mode." However PowerPC Architecture defines + "round to Nearest" as "Choose the best approximation. In case of a + tie, choose the one that is even (least significant bit o).". + So we pre-round using the V2.02 Floating Round to Integer Nearest + instruction before we use Floating Convert to Integer Word with + round to zero instruction. */ + + .machine "power6" +ENTRY (__llround) + CALL_MCOUNT 0 + frin fp2,fp1 /* Round to nearest +-0.5. */ + fctidz fp3,fp2 /* Convert To Integer DW round toward 0. */ + mftgpr r3,fp3 /* Transfer integer to R3. */ + blr + END (__llround) + +strong_alias (__llround, __lround) +weak_alias (__llround, llround) +weak_alias (__lround, lround) + +#ifdef NO_LONG_DOUBLE +weak_alias (__llround, llroundl) +strong_alias (__llround, __llroundl) +weak_alias (__lround, lroundl) +strong_alias (__lround, __lroundl) +#endif +#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1) +compat_symbol (libm, __llround, llroundl, GLIBC_2_1) +compat_symbol (libm, __lround, lroundl, GLIBC_2_1) +#endif |