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3a8e01a77a
Somehow or another, I previously had missed `BUILD.mk` files. In the process I found a few straggler cases where the modeline was different from the file, including one very involved manual fix where a file had been treated like it was ts=2 and ts=8 on separate occasions. The commit history in the PR shows the gory details; the BUILD.mk was automated, everything else was mostly manual.
105 lines
4.5 KiB
C
105 lines
4.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Optimized Routines │
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│ Copyright (c) 1999-2022, Arm Limited. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/intrin/likely.h"
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#include "libc/math.h"
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#include "libc/tinymath/sincosf.internal.h"
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asm(".ident\t\"\\n\\n\
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Optimized Routines (MIT License)\\n\
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Copyright 2022 ARM Limited\"");
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asm(".include \"libc/disclaimer.inc\"");
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// clang-format off
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/* Fast sincosf implementation. Worst-case ULP is 0.5607, maximum relative
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error is 0.5303 * 2^-23. A single-step range reduction is used for
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small values. Large inputs have their range reduced using fast integer
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arithmetic. */
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void
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sincosf (float y, float *sinp, float *cosp)
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{
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double x = y;
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double s;
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int n;
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const sincos_t *p = &__sincosf_table[0];
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if (abstop12 (y) < abstop12 (pio4f))
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{
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double x2 = x * x;
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if (UNLIKELY (abstop12 (y) < abstop12 (0x1p-12f)))
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{
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if (UNLIKELY (abstop12 (y) < abstop12 (0x1p-126f)))
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/* Force underflow for tiny y. */
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FORCE_EVAL (x2);
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*sinp = y;
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*cosp = 1.0f;
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return;
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}
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sincosf_poly (x, x2, p, 0, sinp, cosp);
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}
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else if (abstop12 (y) < abstop12 (120.0f))
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{
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x = reduce_fast (x, p, &n);
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/* Setup the signs for sin and cos. */
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s = p->sign[n & 3];
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if (n & 2)
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p = &__sincosf_table[1];
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sincosf_poly (x * s, x * x, p, n, sinp, cosp);
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}
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else if (LIKELY (abstop12 (y) < abstop12 (INFINITY)))
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{
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uint32_t xi = asuint (y);
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int sign = xi >> 31;
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x = reduce_large (xi, &n);
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/* Setup signs for sin and cos - include original sign. */
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s = p->sign[(n + sign) & 3];
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if ((n + sign) & 2)
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p = &__sincosf_table[1];
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sincosf_poly (x * s, x * x, p, n, sinp, cosp);
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}
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else
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{
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/* Return NaN if Inf or NaN for both sin and cos. */
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*sinp = *cosp = y - y;
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#if WANT_ERRNO
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/* Needed to set errno for +-Inf, the add is a hack to work
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around a gcc register allocation issue: just passing y
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affects code generation in the fast path. */
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__math_invalidf (y + y);
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#endif
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}
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}
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