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Diffstat (limited to 'REORG.TODO/sysdeps/powerpc/powerpc64/fpu/s_truncf.S')
| -rw-r--r-- | REORG.TODO/sysdeps/powerpc/powerpc64/fpu/s_truncf.S | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/powerpc/powerpc64/fpu/s_truncf.S b/REORG.TODO/sysdeps/powerpc/powerpc64/fpu/s_truncf.S new file mode 100644 index 0000000000..cfcff80bf7 --- /dev/null +++ b/REORG.TODO/sysdeps/powerpc/powerpc64/fpu/s_truncf.S @@ -0,0 +1,73 @@ +/* truncf function. PowerPC64 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> + + .section ".toc","aw" + .p2align 3 +.LC0: /* 2**23 */ + .long 0x4b000000 + .long 0x0 + .section ".text" + +/* float [fp1] truncf (float x [fp1]) + IEEE 1003.1 trunc function. IEEE specifies "trunc to the integer + value, in floating format, nearest to but no larger in magnitude + then the argument." + We set "round toward Zero" mode and trunc by adding +-2**23 then + subtracting +-2**23. */ + +EALIGN (__truncf, 4, 0) + CALL_MCOUNT 0 + lfs fp13,.LC0@toc(2) + 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 toward 0 mode. */ + ble- cr6,.L4 + 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: + bge- cr6,.L9 /* if (x < 0.0) */ + fsubs fp1,fp1,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 (__truncf) + +weak_alias (__truncf, truncf) + |