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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [spu/] [float_unsdidf.c] - Rev 294
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/* Copyright (C) 2006, 2008, 2009 Free Software Foundation, Inc. This file is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This file is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ #include <spu_intrinsics.h> const unsigned char __didf_scale[16] __attribute__ ((__aligned__ (16))) = { 0x00, 0x00, 0x04, 0x3e, 0x00, 0x00, 0x04, 0x1e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; const unsigned char __didf_pat[16] __attribute__ ((__aligned__ (16))) = { 0x02, 0x03, 0x10, 0x11, 0x12, 0x13, 0x80, 0x80, 0x06, 0x07, 0x14, 0x15, 0x16, 0x17, 0x80, 0x80 }; /* double __float_unsdidf (unsigned long long int) Construct two exact doubles representing the high and low parts (in parallel), then add them. */ qword __float_unsdidf (qword DI); qword __float_unsdidf (qword DI) { qword t0, t1, t2, t3, t4, t5, t6, t7, t8; t0 = si_clz (DI); t1 = si_shl (DI, t0); t2 = si_ceqi (t0, 32); t3 = si_sf (t0, *(const qword *) __didf_scale); t4 = si_a (t1, t1); t5 = si_andc (t3, t2); t6 = si_shufb (t5, t4, *(const qword *) __didf_pat); t7 = si_shlqbii (t6, 4); t8 = si_shlqbyi (t7, 8); return si_dfa (t7, t8); }
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