mirror of
https://github.com/libretro/RetroArch
synced 2025-02-02 23:54:06 +00:00
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
|
/*
|
||
|
|
The MIT License (MIT)
|
||
|
|
|
||
|
|
Copyright (c) 2015 Lachlan Tychsen-Smith (lachlan.ts@gmail.com)
|
||
|
|
|
||
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
of this software and associated documentation files (the "Software"), to deal
|
||
|
|
in the Software without restriction, including without limitation the rights
|
||
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
copies of the Software, and to permit persons to whom the Software is
|
||
|
|
furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
The above copyright notice and this permission notice shall be included in
|
||
|
|
all copies or substantial portions of the Software.
|
||
|
|
|
||
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
THE SOFTWARE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "math.h"
|
||
|
|
#include "math_neon.h"
|
||
|
|
|
||
|
|
float ldexpf_c(float m, int e)
|
||
|
|
{
|
||
|
|
union {
|
||
|
|
float f;
|
||
|
|
int i;
|
||
|
|
} r;
|
||
|
|
r.f = m;
|
||
|
|
r.i += (e << 23);
|
||
|
|
return r.f;
|
||
|
|
}
|
||
|
|
|
||
|
|
float ldexpf_neon_hfp(float m, int e)
|
||
|
|
{
|
||
|
|
#ifdef __MATH_NEON
|
||
|
|
float r;
|
||
|
|
asm volatile (
|
||
|
|
"lsl r0, r0, #23 \n\t" //r0 = r0 << 23
|
||
|
|
"vdup.i32 d1, r0 \n\t" //d1 = {r0, r0}
|
||
|
|
"vadd.i32 d0, d0, d1 \n\t" //d0 = d0 + d1
|
||
|
|
::: "d0", "d1"
|
||
|
|
);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
float ldexpf_neon_sfp(float m, int e)
|
||
|
|
{
|
||
|
|
#ifdef __MATH_NEON
|
||
|
|
float r;
|
||
|
|
asm volatile (
|
||
|
|
"lsl r1, r1, #23 \n\t" //r1 = r1 << 23
|
||
|
|
"vdup.f32 d0, r0 \n\t" //d0 = {r0, r0}
|
||
|
|
"vdup.i32 d1, r1 \n\t" //d1 = {r1, r1}
|
||
|
|
"vadd.i32 d0, d0, d1 \n\t" //d0 = d0 + d1
|
||
|
|
"vmov.f32 r0, s0 \n\t" //r0 = s0
|
||
|
|
::: "d0", "d1"
|
||
|
|
);
|
||
|
|
#else
|
||
|
|
return ldexpf_c(m,e);
|
||
|
|
#endif
|
||
|
|
}
|