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| author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2011-12-17 14:59:47 -0500 |
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| committer | Ulrich Drepper <drepper@gmail.com> | 2011-12-17 14:59:47 -0500 |
| commit | a1267ba1c6967afdc9ed9af16e3b42f5a240988e (patch) | |
| tree | f683c57d73aa19d4e62a3cd6fdb83d153f66b4ef /sysdeps/powerpc/powerpc64/fpu/s_nearbyintf.S | |
| parent | ad8ac1bd6a3db5becaf1dc20394f6e682d7828cc (diff) | |
| download | glibc-a1267ba1c6967afdc9ed9af16e3b42f5a240988e.tar.gz glibc-a1267ba1c6967afdc9ed9af16e3b42f5a240988e.tar.xz glibc-a1267ba1c6967afdc9ed9af16e3b42f5a240988e.zip | |
Optimized nearbyint for PPC
Diffstat (limited to 'sysdeps/powerpc/powerpc64/fpu/s_nearbyintf.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/fpu/s_nearbyintf.S | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/fpu/s_nearbyintf.S b/sysdeps/powerpc/powerpc64/fpu/s_nearbyintf.S new file mode 100644 index 0000000000..c337e7937f --- /dev/null +++ b/sysdeps/powerpc/powerpc64/fpu/s_nearbyintf.S @@ -0,0 +1,59 @@ +/* Round to int floating-point values. PowerPC64 version. + Copyright (C) 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011 + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* This has been coded in assembler because GCC makes such a mess of it + when it's coded in C. */ + +#include <sysdep.h> + + +/* float [fp1] nearbyintf(float [fp1]) */ + + .section ".toc","aw" +.LC0: /* 2**23 */ + .tc FD_4b000000_0[TC],0x4b00000000000000 + .section ".text" + +EALIGN (__nearbyintf, 4, 0) + CALL_MCOUNT 0 + fabs fp0,fp1 + lfs fp13,.LC0@toc(2) + fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */ + bgelr cr7 + fsubs fp12,fp13,fp13 /* generate 0.0 */ + fcmpu cr7,fp1,fp12 /* if (x > 0.0) */ + ble cr7, L(lessthanzero) + mtfsb0 4*cr7+lt /* Disable FE_INEXACT exception */ + fadds fp1,fp1,fp13 /* x += TWO23 */ + fsubs fp1,fp1,fp13 /* x -= TWO23 */ + fabs fp1,fp1 /* if (x == 0.0) */ + mtfsb0 4*cr1+eq /* Clear pending FE_INEXACT exception */ + blr /* x = 0.0; */ +L(lessthanzero): + bgelr cr7 /* if (x < 0.0) */ + mtfsb0 4*cr7+lt /* Disable FE_INEXACT exception */ + fsubs fp1,fp1,fp13 /* x -= TWO23 */ + fadds fp1,fp1,fp13 /* x += TWO23 */ + fnabs fp1,fp1 /* if (x == 0.0) */ + mtfsb0 4*cr1+eq /* Clear pending FE_INEXACT exception */ + blr /* x = -0.0; */ +END (__nearbyintf) + +weak_alias (__nearbyintf, nearbyintf) |