bbb7555403
This expands the pattern suggest in https://reviews.llvm.org/D95850 to all math functions.
52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
//===-- sinf/cosf data tables ---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "math_utils.h"
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#include "sincosf_utils.h"
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#include <stdint.h>
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namespace __llvm_libc {
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// The constants and polynomials for sine and cosine. The 2nd entry
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// computes -cos (x) rather than cos (x) to get negation for free.
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const sincos_t __sincosf_table[2] = {
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{{1.0, -1.0, -1.0, 1.0},
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as_double(0x41645f306dc9c883),
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as_double(0x3ff921fb54442d18),
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as_double(0x3ff0000000000000),
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as_double(0xbfdffffffd0c621c),
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as_double(0x3fa55553e1068f19),
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as_double(0xbf56c087e89a359d),
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as_double(0x3ef99343027bf8c3),
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as_double(0xbfc555545995a603),
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as_double(0x3f81107605230bc4),
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as_double(0xbf2994eb3774cf24)},
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{{1.0, -1.0, -1.0, 1.0},
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as_double(0x41645f306dc9c883),
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as_double(0x3ff921fb54442d18),
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as_double(0xbff0000000000000),
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as_double(0x3fdffffffd0c621c),
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as_double(0xbfa55553e1068f19),
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as_double(0x3f56c087e89a359d),
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as_double(0xbef99343027bf8c3),
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as_double(0xbfc555545995a603),
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as_double(0x3f81107605230bc4),
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as_double(0xbf2994eb3774cf24)},
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};
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// Table with 4/PI to 192 bit precision. To avoid unaligned accesses
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// only 8 new bits are added per entry, making the table 4 times larger.
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const uint32_t __inv_pio4[24] = {
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0xa2, 0xa2f9, 0xa2f983, 0xa2f9836e, 0xf9836e4e, 0x836e4e44,
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0x6e4e4415, 0x4e441529, 0x441529fc, 0x1529fc27, 0x29fc2757, 0xfc2757d1,
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0x2757d1f5, 0x57d1f534, 0xd1f534dd, 0xf534ddc0, 0x34ddc0db, 0xddc0db62,
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0xc0db6295, 0xdb629599, 0x6295993c, 0x95993c43, 0x993c4390, 0x3c439041};
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} // namespace __llvm_libc
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