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author | David S. Miller <davem@davemloft.net> | 2013-01-15 20:59:54 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2013-01-15 20:59:54 -0800 |
commit | c42d5e9862d9e62d2864d11f628b1e8b5be13ac2 (patch) | |
tree | 1810c25365032cc736e305172c07867f67691891 /sysdeps/sparc/sparc64/fpu/s_nearbyintf.S | |
parent | c19a9f896c8ab28ad205e3ccf561ca8e9ebf426f (diff) | |
download | glibc-c42d5e9862d9e62d2864d11f628b1e8b5be13ac2.tar.gz glibc-c42d5e9862d9e62d2864d11f628b1e8b5be13ac2.tar.xz glibc-c42d5e9862d9e62d2864d11f628b1e8b5be13ac2.zip |
Optimize nearbyint{,f} on sparc.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile: Add vis3 nearbyint{,f} to libm-sysdep_routes. * sysdeps/sparc/sparc64/fpu/multiarch/Makefile: Likewise. * sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_nearbyint-vis3.S: New file. * sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_nearbyint.S: New file. * sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_nearbyintf-vis3.S: New file. * sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_nearbyintf.S: New file. * sysdeps/sparc/sparc32/sparcv9/fpu/s_nearbyint.S: New file. * sysdeps/sparc/sparc32/sparcv9/fpu/s_nearbyintf.S: New file. * sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyint-vis3.S: New file. * sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyint.S: New file. * sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyintf-vis3.S: New file. * sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyintf.S: New file. * sysdeps/sparc/sparc64/fpu/s_nearbyint.S: New file. * sysdeps/sparc/sparc64/fpu/s_nearbyintf.S: New file.
Diffstat (limited to 'sysdeps/sparc/sparc64/fpu/s_nearbyintf.S')
-rw-r--r-- | sysdeps/sparc/sparc64/fpu/s_nearbyintf.S | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc64/fpu/s_nearbyintf.S b/sysdeps/sparc/sparc64/fpu/s_nearbyintf.S new file mode 100644 index 0000000000..4ff29058eb --- /dev/null +++ b/sysdeps/sparc/sparc64/fpu/s_nearbyintf.S @@ -0,0 +1,62 @@ +/* Round float to int floating-point values without generating + an inexact exception, sparc64 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 (__nearbyintf) + stx %fsr, [%sp + STACK_BIAS + 144] + sethi %hi(0xf8003e0), %o5 + sethi %hi(TWO_TWENTYTHREE), %o2 + ldx [%sp + STACK_BIAS + 144], %o4 + or %o5, %lo(0xf8003e0), %o5 + fzeros ZERO + andn %o4, %o5, %o4 + fnegs ZERO, SIGN_BIT + st %o2, [%sp + STACK_BIAS + 128] + stx %o4, [%sp + STACK_BIAS + 136] + ldx [%sp + STACK_BIAS + 136], %fsr + fabss %f1, %f14 + ld [%sp + STACK_BIAS + 128], %f16 + fcmps %fcc3, %f14, %f16 + fmovsuge %fcc3, ZERO, %f16 + fands %f1, SIGN_BIT, SIGN_BIT + fors %f16, SIGN_BIT, %f16 + fadds %f1, %f16, %f5 + fsubs %f5, %f16, %f0 + fabss %f0, %f0 + fors %f0, SIGN_BIT, %f0 + retl + ldx [%sp + STACK_BIAS + 144], %fsr +END (__nearbyintf) +weak_alias (__nearbyintf, nearbyintf) |