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Diffstat (limited to 'REORG.TODO/sysdeps/powerpc/powerpc64/fpu/s_trunc.S')
-rw-r--r-- | REORG.TODO/sysdeps/powerpc/powerpc64/fpu/s_trunc.S | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/powerpc/powerpc64/fpu/s_trunc.S b/REORG.TODO/sysdeps/powerpc/powerpc64/fpu/s_trunc.S new file mode 100644 index 0000000000..890eb21c54 --- /dev/null +++ b/REORG.TODO/sysdeps/powerpc/powerpc64/fpu/s_trunc.S @@ -0,0 +1,79 @@ +/* trunc 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> +#include <math_ldbl_opt.h> + + .section ".toc","aw" +.LC0: /* 2**52 */ + .tc FD_43300000_0[TC],0x4330000000000000 + .section ".text" + +/* double [fp1] trunc (double 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**52 then + subtracting +-2**52. */ + +EALIGN (__trunc, 4, 0) + CALL_MCOUNT 0 + lfd fp13,.LC0@toc(2) + 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 toward 0 mode. */ + ble- cr6,.L4 + 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: + bge- cr6,.L9 /* if (x < 0.0) */ + fsub fp1,fp1,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 (__trunc) + +weak_alias (__trunc, trunc) + +#ifdef NO_LONG_DOUBLE +weak_alias (__trunc, truncl) +strong_alias (__trunc, __truncl) +#endif +#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1) +compat_symbol (libm, __trunc, truncl, GLIBC_2_1) +#endif |