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author | David S. Miller <davem@davemloft.net> | 2013-01-15 23:59:02 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2013-01-16 00:00:54 -0800 |
commit | 1aa6176780752567fa85a22d25185f78d0419c76 (patch) | |
tree | 0d1dc705cdc0f077e80bc111243f1e7b128b2605 /sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S | |
parent | c42d5e9862d9e62d2864d11f628b1e8b5be13ac2 (diff) | |
download | glibc-1aa6176780752567fa85a22d25185f78d0419c76.tar.gz glibc-1aa6176780752567fa85a22d25185f78d0419c76.tar.xz glibc-1aa6176780752567fa85a22d25185f78d0419c76.zip |
Optimize trunc{,f} on sparc.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile: Add vis3 trunc{,f} to libm-sysdep_routes. * sysdeps/sparc/sparc64/fpu/multiarch/Makefile: Likewise. * sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc-vis3.S: New file. * sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc.S: New file. * sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf-vis3.S: New file. * sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf.S: New file. * sysdeps/sparc/sparc32/sparcv9/fpu/s_trunc.S: New file. * sysdeps/sparc/sparc32/sparcv9/fpu/s_truncf.S: New file. * sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.S: New file. * sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.S: New file. * sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S: New file. * sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.S: New file. * sysdeps/sparc/sparc64/fpu/s_trunc.S: New file. * sysdeps/sparc/sparc64/fpu/s_truncf.S: New file.
Diffstat (limited to 'sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S')
-rw-r--r-- | sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S new file mode 100644 index 0000000000..e566b6ba82 --- /dev/null +++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S @@ -0,0 +1,52 @@ +/* Truncate argument to nearest integral value not larger than + the argument, sparc64 vis3 version. + + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2013. + + 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> + + /* We pop constants into the FPU registers using the incoming + argument stack slots, since this avoid having to use any PIC + references. We also thus avoid having to allocate a register + window. + + VIS instructions are used to facilitate the formation of + easier constants, and the propagation of the sign bit. */ + +#define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */ + +#define ZERO %f10 /* 0.0 */ +#define SIGN_BIT %f12 /* -0.0 */ + +ENTRY (__truncf_vis3) + sethi %hi(TWO_TWENTYTHREE), %o2 + fzeros ZERO + fnegs ZERO, SIGN_BIT + movwtos %o2,%f16 + fabss %f1, %f14 + fcmps %fcc3, %f14, %f16 + fmovsuge %fcc3, ZERO, %f14 + fands %f1, SIGN_BIT, SIGN_BIT + fstoi %f14, %f14 + fitos %f14, %f14 + fadds %f1, ZERO, %f18 + fmovsuge %fcc3, %f18, %f14 + retl + fors %f14, SIGN_BIT, %f0 +END (__truncf_vis3) |