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59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
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/*
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The MIT License (MIT)
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Copyright (c) 2015 Lachlan Tychsen-Smith (lachlan.ts@gmail.com)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#include "math_neon.h"
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float fabsf_c(float x)
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{
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union {
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int i;
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float f;
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} xx;
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xx.f = x;
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xx.i = xx.i & 0x7FFFFFFF;
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return xx.f;
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}
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float fabsf_neon_hfp(float x)
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{
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#ifdef __MATH_NEON
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asm volatile (
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"fabss s0, s0 \n\t" //s0 = fabs(s0)
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);
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#endif
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}
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float fabsf_neon_sfp(float x)
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{
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#ifdef __MATH_NEON
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asm volatile (
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"bic r0, r0, #0x80000000 \n\t" //r0 = r0 & ~(1 << 31)
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);
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#else
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return fabsf_c(x);
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#endif
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}
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