| /* |
| (C) Copyright 2001,2006, |
| International Business Machines Corporation, |
| Sony Computer Entertainment, Incorporated, |
| Toshiba Corporation, |
| |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| |
| * Redistributions of source code must retain the above copyright notice, |
| this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| * Neither the names of the copyright holders nor the names of their |
| contributors may be used to endorse or promote products derived from this |
| software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
| PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER |
| OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * Functions to pack/unpack the 128 bit fpscr to/from the 32 bit fenv_t. |
| * The fpscr currently has 32 of 128 bits defined. |
| */ |
| |
| #ifndef _FEFPSCR_H_ |
| #define _FEFPSCR_H_ 1 |
| |
| #include <spu_intrinsics.h> |
| #include <fenv.h> |
| |
| static __inline vec_uint4 __unpack_fpscr(fenv_t word) |
| { |
| vec_uint4 fpscr; |
| vec_uchar16 splat = { 0, 1, 0, 1, 0, 1, 0, 1, 2, 3, 2, 3, 2, 3, 2, 3 }; |
| vec_short8 rotm = { -12, -9, -3, 0, -10, -7, -3, 0 }; |
| vec_uint4 mask = { 0x00000f07, 0x00003f07, 0x00003f07, 0x00000f07 }; |
| |
| fpscr = spu_promote (word, 0); |
| fpscr = spu_shuffle (fpscr, fpscr, splat); |
| /* |
| * The casts here are important, so we generate different code. |
| */ |
| fpscr = (vec_uint4) spu_rlmask ((vec_short8) fpscr, rotm); |
| fpscr = (vec_uint4) spu_and ((vec_short8) fpscr, 0xff); |
| fpscr = spu_or (spu_rlmask(fpscr, -8), fpscr); |
| fpscr = spu_and (fpscr, mask); |
| return fpscr; |
| } |
| |
| static __inline fenv_t __pack_fpscr(vec_uint4 fpscr) |
| { |
| vec_uchar16 pat = { 0x80, 2, 0x80, 10, 0x80, 3, 0x80, 11, |
| 0x80, 6, 0x80, 14, 0x80, 7, 0x80, 15 }; |
| vec_ushort8 shl = { 12, 10, 9, 7, 3, 3, 0, 0 }; |
| vec_uint4 mask = { 0x00000f07, 0x00003f07, 0x00003f07, 0x00000f07 }; |
| vec_uint4 word; |
| |
| word = spu_and (fpscr, mask); |
| word = spu_shuffle (word, word, pat); |
| word = (vec_uint4) spu_sl ((vec_short8) word, shl); |
| word = spu_orx (word); |
| return spu_extract (word, 0); |
| } |
| |
| #endif |