diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/fpu/s_roundf.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/fpu/s_roundf.S | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_roundf.S b/sysdeps/powerpc/powerpc32/fpu/s_roundf.S deleted file mode 100644 index cb59a2ba51..0000000000 --- a/sysdeps/powerpc/powerpc32/fpu/s_roundf.S +++ /dev/null @@ -1,96 +0,0 @@ -/* roundf function. PowerPC32 version. - Copyright (C) 2004-2019 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 - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include <libm-alias-float.h> - - .section .rodata.cst8,"aM",@progbits,8 - .align 3 -.LC0: /* 2**23 */ - .long 0x4b000000 -.LC1: /* 0.5 */ - .long 0x3f000000 - -/* float [fp1] roundf (float 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 (__roundf ) -#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 - fsubs fp12,fp13,fp13 /* generate 0.0 */ - fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO23) */ - 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 - lfs fp10,.LC1@l(r9) -#endif - ble- cr6,.L4 - fadds fp1,fp1,fp10 /* x+= 0.5; */ - fadds fp1,fp1,fp13 /* x+= TWO23; */ - fsubs fp1,fp1,fp13 /* x-= TWO23; */ - fabs fp1,fp1 /* if (x == 0.0) */ - /* x = 0.0; */ - mtfsf 0xff,fp11 /* Restore previous rounding mode and - "inexact" state. */ - blr -.L4: - fsubs fp9,fp1,fp10 /* x+= 0.5; */ - bge- cr6,.L9 /* if (x < 0.0) */ - fsubs fp1,fp9,fp13 /* x-= TWO23; */ - fadds fp1,fp1,fp13 /* x+= TWO23; */ - 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 - fadds fp1,fp1,fp1 - blr - END (__roundf) - -libm_alias_float (__round, round) - |