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Diffstat (limited to 'newlib/libm/machine/spu/headers/nextafterd2.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/nextafterd2.h | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/newlib/libm/machine/spu/headers/nextafterd2.h b/newlib/libm/machine/spu/headers/nextafterd2.h deleted file mode 100644 index aac9408a1..000000000 --- a/newlib/libm/machine/spu/headers/nextafterd2.h +++ /dev/null @@ -1,123 +0,0 @@ -/* -------------------------------------------------------------- */ -/* (C)Copyright 2007,2008, */ -/* International Business Machines 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 name of IBM Corporation nor the names of its */ -/* 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. */ -/* -------------------------------------------------------------- */ -/* PROLOG END TAG zYx */ -#ifdef __SPU__ -#ifndef _NEXTAFTERD2_H_ -#define _NEXTAFTERD2_H_ 1 - -#include <spu_intrinsics.h> - -/* - * FUNCTION - * vector double _nextafterd2(vector double x, vector double y) - * - * DESCRIPTION - * The nextafterf4 function returns a vector containing the next representable - * floating-point number after the element of x, in the direction of the - * corresponding element y. - * - * Special Cases: - * - nextafter(NaN, y) = NaN - * - nextafter(x, NaN) = NaN - * - x = largest finite value, y = infinity, result is undefined - * - x = largest finite negative value, y = -infinity, result is undefined - * - x != y, and result = 0, considered an underflow - * - */ - -static __inline vector double _nextafterd2(vector double x, vector double y) -{ - vec_double2 n1ulp = (vec_double2)spu_splats(0x8000000000000001ull); - vector unsigned char mov_carry = {0x80,0x80,0x80, 7, 0x80,0x80,0x80,0x80, - 0x80,0x80,0x80,15, 0x80,0x80,0x80,0x80}; - vec_double2 zerod = spu_splats(0.0); - vec_llong2 one = spu_splats(1ll); - vec_ullong2 xlt0, xgty, xeqy, xeq0; - vec_llong2 xllong; - vec_int4 carry; - vec_llong2 delta, deltap1; - vec_double2 result; - - /* Compiler Bug. Replace xtmp/ytmp with x/y when spu_cmpgt(x,y) doesn't change x/y!*/ - volatile vec_double2 xtmp = x; - volatile vec_double2 ytmp = y; - - /* - * The idea here is to treat x as a signed long long value, which allows us to - * add or subtact one to/from it to get the next representable value. - */ - - xeq0 = spu_cmpeq(xtmp, zerod); - xlt0 = spu_cmpgt(zerod, xtmp); - xeqy = spu_cmpeq(xtmp, ytmp); - xgty = spu_cmpgt(xtmp, ytmp); - - /* If x = -0.0, set x = 0.0 */ - x = spu_andc(x, (vec_double2)xeq0); - - xllong = (vec_llong2)x; - - /* Determine value to add to x */ - delta = (vec_llong2)spu_xor(xgty, xlt0); - - //deltap1 = delta + one; - carry = spu_genc((vec_int4)delta, (vec_int4)one); - carry = spu_shuffle(carry, carry, mov_carry); - deltap1 = (vec_llong2)spu_addx((vec_int4)delta, (vec_int4)one, (vec_int4)carry); - - delta = spu_sel(deltap1, delta, (vec_ullong2)delta); - - //xllong = xllong + delta; - carry = spu_genc((vec_int4)xllong, (vec_int4)delta); - carry = spu_shuffle(carry, carry, mov_carry); - xllong = (vec_llong2)spu_addx((vec_int4)xllong, (vec_int4)delta, (vec_int4)carry); - - /* Fix the case of x = 0, and answer should be -1 ulp */ - result = spu_sel((vec_double2)xllong, n1ulp, spu_and((vec_ullong2)delta, xeq0)); - - /* - * Special Cases - */ - - /* x = y */ - result = spu_sel(result, y, xeqy); - - return result; -} - -#endif /* _NEXTAFTERD2_H_ */ -#endif /* __SPU__ */ |