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Diffstat (limited to 'REORG.TODO/sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S')
| -rw-r--r-- | REORG.TODO/sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S b/REORG.TODO/sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S new file mode 100644 index 0000000000..83ba999a39 --- /dev/null +++ b/REORG.TODO/sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S @@ -0,0 +1,59 @@ +/* lround function. POWER5+, PowerPC32 version. + Copyright (C) 2006-2017 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 + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <math_ldbl_opt.h> + +/* long [r3] llround (float x [fp1]) + IEEE 1003.1 lround 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 the Floating Convert to Integer Word with + round to zero instruction. */ + + .machine "power5" +ENTRY (__llround) + stwu r1,-16(r1) + cfi_adjust_cfa_offset (16) + frin fp2,fp1 + fctidz fp3,fp2 /* Convert To Integer Word lround toward 0. */ + stfd fp3,8(r1) +/* Insure the following load is in a different dispatch group by + inserting "group ending nop". */ + ori r1,r1,0 + lwz r3,8+HIWORD(r1) + lwz r4,8+LOWORD(r1) + addi r1,r1,16 + blr + END (__llround) + +weak_alias (__llround, llround) + +strong_alias (__llround, __llroundf) +weak_alias (__llround, llroundf) + +#ifdef NO_LONG_DOUBLE +weak_alias (__llround, llroundl) +strong_alias (__llround, __llroundl) +#endif +#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1) +compat_symbol (libm, __llround, llroundl, GLIBC_2_1) +#endif |