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Diffstat (limited to 'newlib/libm/machine/spu/headers/acosf4.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/acosf4.h | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/newlib/libm/machine/spu/headers/acosf4.h b/newlib/libm/machine/spu/headers/acosf4.h deleted file mode 100644 index 4b76fda23..000000000 --- a/newlib/libm/machine/spu/headers/acosf4.h +++ /dev/null @@ -1,168 +0,0 @@ -/* -------------------------------------------------------------- */ -/* (C)Copyright 2001,2008, */ -/* 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 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 _ACOSF4_H_ -#define _ACOSF4_H_ 1 - -#include <spu_intrinsics.h> - -#include "divf4.h" -#include "sqrtf4.h" - -/* - * FUNCTION - * vector float _acosf4(vector float x) - * - * DESCRIPTION - * The _acosf4 function computes the arc cosine for a vector of values x; - * that is the values whose cosine is x. Results are undefined if x is - * outside the range [-1, 1]. - * - * RETURNS - * The _acosf4 function returns the arc cosine in radians and the value is - * mathematically defined to be in the range [0, pi]. - * - */ -static __inline vector float _acosf4(vector float x) -{ - vec_float4 zero = spu_splats(0.0f); - vec_float4 half = spu_splats(0.5f); - vec_float4 one = spu_splats(1.0f); - vec_float4 two = spu_splats(2.0f); - vec_float4 pi = spu_splats(3.1415925026e+00f); - vec_float4 pio2_hi = spu_splats(1.5707962513e+00f); - vec_float4 pio2_lo = spu_splats(7.5497894159e-08f); - - vec_float4 snan = (vec_float4)spu_splats((unsigned int)0x7FC00000); - vec_uint4 denorm_threshold = spu_splats((unsigned int)0x23000000); - vec_uint4 sign_mask = spu_splats((unsigned int)0x80000000); - - - vec_float4 p0 = (vec_float4)spu_splats((unsigned int)0x3E2AAAAB); - vec_float4 p1 = (vec_float4)spu_splats((unsigned int)0xBEA6B090); - vec_float4 p2 = (vec_float4)spu_splats((unsigned int)0x3E4E0AA8); - vec_float4 p3 = (vec_float4)spu_splats((unsigned int)0xBD241146); - vec_float4 p4 = (vec_float4)spu_splats((unsigned int)0x3A4F7F04); - vec_float4 p5 = (vec_float4)spu_splats((unsigned int)0x3811EF08); - - vec_float4 q1 = (vec_float4)spu_splats((unsigned int)0xC019D139); - vec_float4 q2 = (vec_float4)spu_splats((unsigned int)0x4001572D); - vec_float4 q3 = (vec_float4)spu_splats((unsigned int)0xBF303361); - vec_float4 q4 = (vec_float4)spu_splats((unsigned int)0x3D9DC62E); - - - vec_uint4 x_abs = spu_andc((vec_uint4)x,sign_mask); - vec_uint4 x_pos = spu_cmpgt(sign_mask,(vec_uint4)x); - - - vec_uint4 almost_half = spu_splats((unsigned int)0x3EFFFFFF); - vec_uint4 sel0 = spu_nand(spu_splats((unsigned int)0xFFFFFFFF),spu_cmpgt(x_abs,almost_half)); - vec_uint4 sel1 = spu_andc(x_pos,sel0); // pos - - vec_float4 za = spu_sel(spu_sel(spu_add(one,x),spu_sub(one,x),sel1) ,x,sel0); - vec_float4 zb = spu_sel(half,x,sel0); - - vec_float4 z = spu_mul(za,zb); - - vec_float4 p; - p = spu_madd(z,p5,p4); - p = spu_madd(p,z,p3); - p = spu_madd(p,z,p2); - p = spu_madd(p,z,p1); - p = spu_madd(p,z,p0); - p = spu_mul(p,z); - - vec_float4 q; - q = spu_madd(z,q4,q3); - q = spu_madd(q,z,q2); - q = spu_madd(q,z,q1); - q = spu_madd(q,z,one); - - // Only used by secondaries - vec_float4 s = _sqrtf4(z); - - vec_float4 r = _divf4(p,q); - - vec_float4 w1 = spu_msub(r,s,pio2_lo); - - - vec_float4 df = (vec_float4)spu_and((vec_uint4)s,0xFFFFF000); - vec_float4 c = _divf4(spu_nmsub(df,df,z),spu_add(s,df)); - vec_float4 w2 = spu_madd(r,s,c); - - vec_float4 result0 = spu_sub(pio2_hi,spu_sub(x,spu_nmsub(x,r,pio2_lo))); - - - vec_float4 result1 = spu_mul(two,spu_add(df,w2)); - vec_float4 result2 = spu_nmsub(two,spu_add(s,w1),pi); - - - vec_float4 result; - - result = spu_sel(result2,result1,sel1); - result = spu_sel(result,result0,sel0); - - // If |x|==1 then: - // if x == 1, return 0 - // else return pi - - vec_uint4 abs_one = spu_cmpeq(x_abs,(vec_uint4)one); - vec_uint4 out_of_bounds = spu_cmpgt(x_abs,(vec_uint4)one); - vec_uint4 underflow = spu_cmpgt(denorm_threshold,x_abs); - - - - result = spu_sel(result,spu_sel(pi,zero,x_pos),abs_one); - - // If 1 < |x| then return sNaN - result = spu_sel(result,snan,out_of_bounds); - - // If |x| < 2**-57, then return pi/2 (OFF BY 1 ULP) - result = spu_sel(result,spu_add(pio2_hi,pio2_lo),underflow); - - return result; -} - -#endif /* _ACOSF4_H_ */ -#endif /* __SPU__ */ - - |