| 1 | /* |
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| 2 | (C) Copyright 2001,2006, |
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| 3 | International Business Machines Corporation, |
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| 4 | Sony Computer Entertainment, Incorporated, |
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| 5 | Toshiba Corporation, |
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| 6 | |
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| 7 | All rights reserved. |
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| 8 | |
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| 9 | Redistribution and use in source and binary forms, with or without |
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| 10 | modification, are permitted provided that the following conditions are met: |
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| 11 | |
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| 12 | * Redistributions of source code must retain the above copyright notice, |
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| 13 | this list of conditions and the following disclaimer. |
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| 14 | * Redistributions in binary form must reproduce the above copyright |
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| 15 | notice, this list of conditions and the following disclaimer in the |
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| 16 | documentation and/or other materials provided with the distribution. |
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| 17 | * Neither the names of the copyright holders nor the names of their |
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| 18 | contributors may be used to endorse or promote products derived from this |
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| 19 | software without specific prior written permission. |
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| 20 | |
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| 21 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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| 22 | IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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| 23 | TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
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| 24 | PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER |
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| 25 | OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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| 26 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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| 27 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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| 28 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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| 29 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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| 30 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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| 31 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 32 | */ |
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| 33 | #ifndef _FABS_H_ |
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| 34 | #define _FABS_H_ 1 |
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| 35 | |
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| 36 | /* |
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| 37 | * FUNCTION |
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| 38 | * double _fabs(double value) |
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| 39 | * |
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| 40 | * DESCRIPTION |
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| 41 | * The _fabsf routine returns the absolute value of the floating-point |
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| 42 | * input value "value". This is accomplished by zeroing the most |
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| 43 | * significant bit (ie, the sign bit) of the floating-point value. |
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| 44 | */ |
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| 45 | |
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| 46 | #include <spu_intrinsics.h> |
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| 47 | #include "headers/vec_literal.h" |
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| 48 | |
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| 49 | static __inline double _fabs(double x) |
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| 50 | { |
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| 51 | vec_ullong2 vx; |
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| 52 | |
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| 53 | vx = (vec_ullong2)spu_promote(x, 0); |
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| 54 | vx = spu_andc(vx, VEC_SPLAT_U64(0x8000000000000000ULL)); |
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| 55 | |
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| 56 | return (spu_extract((vec_double2)vx, 0)); |
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| 57 | } |
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| 58 | #endif /* _FABS_H_ */ |
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