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Diffstat (limited to 'newlib/libm/machine/spu/headers/remainderf.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/remainderf.h | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/newlib/libm/machine/spu/headers/remainderf.h b/newlib/libm/machine/spu/headers/remainderf.h deleted file mode 100644 index b610b673e..000000000 --- a/newlib/libm/machine/spu/headers/remainderf.h +++ /dev/null @@ -1,141 +0,0 @@ -/* - (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. -*/ -#ifndef _REMAINDERF_H_ -#define _REMAINDERF_H_ 1 - -#include <spu_intrinsics.h> -#include "headers/vec_literal.h" - -static __inline float _remainderf(float x, float y) -{ - int n; - vec_uint4 vx, vy, z; - vec_uint4 abs_x, abs_y, abs_2x, abs_2y; - vec_uint4 exp_x, exp_y; - vec_uint4 zero_x, zero_y; - vec_uint4 logb_x, logb_y; - vec_uint4 mant_x, mant_y; - vec_uint4 result, result0, resultx, cnt, sign, bias; - vec_uint4 sign_mask = VEC_SPLAT_U32(0x80000000); - vec_uint4 implied_1 = VEC_SPLAT_U32(0x00800000); - vec_uint4 mant_mask = VEC_SPLAT_U32(0x007FFFFF); - vec_float4 two = { 2.0f, 2.0f, 2.0f, 2.0f }; - - vx = (vec_uint4)spu_promote(x, 0); - vy = (vec_uint4)spu_promote(y, 0); - - abs_x = spu_andc(vx, sign_mask); - abs_y = spu_andc(vy, sign_mask); - - abs_2y = spu_add(abs_y, implied_1); /* abs_2y = 2 * abs_y */ - - sign = spu_and(vx, sign_mask); - - /* Compute abs_x = fmodf(abs_x, 2*abs_y). If y is greater than 0.5*SMAX - * (SMAX is the maximum representable float), then return abs_x. - */ - { - /* Determine ilogb of abs_x and abs_2y and - * extract the mantissas (mant_x, mant_y) - */ - exp_x = spu_rlmask(abs_x, -23); - exp_y = spu_rlmask(abs_2y, -23); - - resultx = spu_or(spu_cmpgt(abs_2y, abs_x), spu_cmpgt(abs_y, VEC_SPLAT_U32(0x7F7FFFFF))); - - zero_x = spu_cmpeq(exp_x, 0); - zero_y = spu_cmpeq(exp_y, 0); - - logb_x = spu_add(exp_x, -127); - logb_y = spu_add(exp_y, -127); - - mant_x = spu_andc(spu_sel(implied_1, abs_x, mant_mask), zero_x); - mant_y = spu_andc(spu_sel(implied_1, abs_2y, mant_mask), zero_y); - - /* Compute fixed point fmod of mant_x and mant_y. Set the flag, - * result0, to all ones if we detect that the final result is - * ever 0. - */ - result0 = spu_or(zero_x, zero_y); - - n = spu_extract(spu_sub(logb_x, logb_y), 0); - - - while (n-- > 0) { - z = spu_sub(mant_x, mant_y); - - result0 = spu_or(spu_cmpeq(z, 0), result0); - - mant_x = spu_sel(spu_add(mant_x, mant_x), spu_add(z, z), - spu_cmpgt((vec_int4)z, -1)); - } - - z = spu_sub(mant_x, mant_y); - mant_x = spu_sel(mant_x, z, spu_cmpgt((vec_int4)z, -1)); - - result0 = spu_or(spu_cmpeq(mant_x, 0), result0); - - /* Convert the result back to floating point and restore - * the sign. If we flagged the result to be zero (result0), - * zero it. If we flagged the result to equal its input x, - * (resultx) then return x. - */ - cnt = spu_add(spu_cntlz(mant_x), -8); - - mant_x = spu_rl(spu_andc(mant_x, implied_1), (vec_int4)cnt); - - exp_y = spu_sub(exp_y, cnt); - result0 = spu_orc(result0, spu_cmpgt((vec_int4)exp_y, 0)); /* zero denorm results */ - exp_y = spu_rl(exp_y, 23); - - result = spu_sel(exp_y, mant_x, mant_mask); - abs_x = spu_sel(spu_andc(result, spu_rlmask(result0, -1)), abs_x, resultx); - } - - /* if (2*x > y) - * x -= y - * if (2*x >= y) x -= y - */ - abs_2x = spu_add(abs_x, implied_1); - bias = spu_cmpgt(abs_2x, abs_y); - abs_x = spu_sel(abs_x, (vec_uint4)spu_sub((vec_float4)abs_x, (vec_float4)abs_y), bias); - bias = spu_andc(bias, spu_rlmaska((vec_uint4)spu_msub((vec_float4)abs_x, two, (vec_float4)abs_y), -31)); - abs_x = spu_sel(abs_x, (vec_uint4)spu_sub((vec_float4)abs_x, (vec_float4)abs_y), bias); - - /* Generate a correct final sign - */ - result = spu_xor(abs_x, sign); - - return (spu_extract((vec_float4)result, 0)); -} -#endif /* _REMAINDERF_H_ */ |