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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/powerpc/powerpc32/fpu/s_round.S | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.xz glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'sysdeps/powerpc/powerpc32/fpu/s_round.S')
-rw-r--r-- | sysdeps/powerpc/powerpc32/fpu/s_round.S | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_round.S b/sysdeps/powerpc/powerpc32/fpu/s_round.S deleted file mode 100644 index f539890b17..0000000000 --- a/sysdeps/powerpc/powerpc32/fpu/s_round.S +++ /dev/null @@ -1,104 +0,0 @@ -/* round function. PowerPC32 version. - Copyright (C) 2004-2017 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> - - .section .rodata.cst8,"aM",@progbits,8 - .align 2 -.LC0: /* 2**52 */ - .long 0x59800000 -.LC1: /* 0.5 */ - .long 0x3f000000 - -/* double [fp1] round (double x [fp1]) - IEEE 1003.1 round 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 can't use the PowerPC "Round to Nearest" mode. Instead we set - "Round toward Zero" mode and round by adding +-0.5 before rounding - to the integer value. */ - - .section ".text" -ENTRY (__round) -#ifdef SHARED - mflr r11 - cfi_register(lr,r11) - SETUP_GOT_ACCESS(r9,got_label) - addis r9,r9,.LC0-got_label@ha - addi r9,r9,.LC0-got_label@l - mtlr r11 - cfi_same_value (lr) - lfs fp13,0(r9) -#else - lis r9,.LC0@ha - lfs fp13,.LC0@l(r9) -#endif - fabs fp0,fp1 - fsub fp12,fp13,fp13 /* generate 0.0 */ - fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */ - mffs fp11 /* Save current FPU rounding mode and - "inexact" state. */ - fcmpu cr6,fp1,fp12 /* if (x > 0.0) */ - bnl- cr7,.L10 - mtfsfi 7,1 /* Set rounding mode toward 0. */ -#ifdef SHARED - lfs fp10,.LC1-.LC0(r9) -#else - lis r9,.LC1@ha - lfs fp10,.LC1@l(r9) -#endif - ble- cr6,.L4 - fadd fp1,fp1,fp10 /* x+= 0.5; */ - fadd fp1,fp1,fp13 /* x+= TWO52; */ - fsub fp1,fp1,fp13 /* x-= TWO52; */ - fabs fp1,fp1 /* if (x == 0.0) */ - /* x = 0.0; */ - mtfsf 0xff,fp11 /* Restore previous rounding mode and - "inexact" state. */ - blr -.L4: - fsub fp9,fp1,fp10 /* x+= 0.5; */ - bge- cr6,.L9 /* if (x < 0.0) */ - fsub fp1,fp9,fp13 /* x-= TWO52; */ - fadd fp1,fp1,fp13 /* x+= TWO52; */ - fnabs fp1,fp1 /* if (x == 0.0) */ - /* x = -0.0; */ -.L9: - mtfsf 0xff,fp11 /* Restore previous rounding mode and - "inexact" state. */ - blr -.L10: - /* Ensure sNaN input is converted to qNaN. */ - fcmpu cr7,fp1,fp1 - beqlr cr7 - fadd fp1,fp1,fp1 - blr - END (__round) - -weak_alias (__round, round) - -#ifdef NO_LONG_DOUBLE -weak_alias (__round, roundl) -strong_alias (__round, __roundl) -#endif -#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1) -compat_symbol (libm, __round, roundl, GLIBC_2_1) -#endif |