| 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 | |
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| 34 | /* |
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| 35 | * Functions to pack/unpack the 128 bit fpscr to/from the 32 bit fenv_t. |
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| 36 | * The fpscr currently has 32 of 128 bits defined. |
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| 37 | */ |
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| 38 | |
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| 39 | #ifndef _FEFPSCR_H_ |
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| 40 | #define _FEFPSCR_H_ 1 |
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| 41 | |
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| 42 | #include <spu_intrinsics.h> |
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| 43 | #include <fenv.h> |
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| 44 | |
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| 45 | static __inline vec_uint4 __unpack_fpscr(fenv_t word) |
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| 46 | { |
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| 47 | vec_uint4 fpscr; |
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| 48 | vec_uchar16 splat = { 0, 1, 0, 1, 0, 1, 0, 1, 2, 3, 2, 3, 2, 3, 2, 3 }; |
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| 49 | vec_short8 rotm = { -12, -9, -3, 0, -10, -7, -3, 0 }; |
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| 50 | vec_uint4 mask = { 0x00000f07, 0x00003f07, 0x00003f07, 0x00000f07 }; |
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| 51 | |
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| 52 | fpscr = spu_promote (word, 0); |
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| 53 | fpscr = spu_shuffle (fpscr, fpscr, splat); |
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| 54 | /* |
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| 55 | * The casts here are important, so we generate different code. |
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| 56 | */ |
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| 57 | fpscr = (vec_uint4) spu_rlmask ((vec_short8) fpscr, rotm); |
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| 58 | fpscr = (vec_uint4) spu_and ((vec_short8) fpscr, 0xff); |
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| 59 | fpscr = spu_or (spu_rlmask(fpscr, -8), fpscr); |
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| 60 | fpscr = spu_and (fpscr, mask); |
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| 61 | return fpscr; |
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| 62 | } |
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| 63 | |
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| 64 | static __inline fenv_t __pack_fpscr(vec_uint4 fpscr) |
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| 65 | { |
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| 66 | vec_uchar16 pat = { 0x80, 2, 0x80, 10, 0x80, 3, 0x80, 11, |
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| 67 | 0x80, 6, 0x80, 14, 0x80, 7, 0x80, 15 }; |
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| 68 | vec_ushort8 shl = { 12, 10, 9, 7, 3, 3, 0, 0 }; |
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| 69 | vec_uint4 mask = { 0x00000f07, 0x00003f07, 0x00003f07, 0x00000f07 }; |
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| 70 | vec_uint4 word; |
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| 71 | |
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| 72 | word = spu_and (fpscr, mask); |
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| 73 | word = spu_shuffle (word, word, pat); |
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| 74 | word = (vec_uint4) spu_sl ((vec_short8) word, shl); |
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| 75 | word = spu_orx (word); |
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| 76 | return spu_extract (word, 0); |
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| 77 | } |
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| 78 | |
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| 79 | #endif |
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