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3719602c PC |
1 | /* Copyright (C) 2010-2020 The RetroArch team |
2 | * | |
3 | * --------------------------------------------------------------------------------------- | |
4 | * The following license statement only applies to this file (fxp.h). | |
5 | * --------------------------------------------------------------------------------------- | |
6 | * | |
7 | * Permission is hereby granted, free of charge, | |
8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation the rights to | |
10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, | |
11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #ifndef __LIBRETRO_SDK_MATH_FXP_H__ | |
24 | #define __LIBRETRO_SDK_MATH_FXP_H__ | |
25 | ||
26 | #include <stdint.h> | |
27 | ||
28 | #ifdef _MSC_VER | |
29 | #include <intrin.h> | |
30 | #endif | |
31 | ||
32 | #include <retro_inline.h> | |
33 | ||
34 | static INLINE int64_t fx32_mul(const int32_t a, const int32_t b) | |
35 | { | |
36 | #ifdef _MSC_VER | |
37 | return __emul(a, b); | |
38 | #else | |
39 | return ((int64_t)a) * ((int64_t)b); | |
40 | #endif | |
41 | } | |
42 | ||
43 | static INLINE int32_t fx32_shiftdown(const int64_t a) | |
44 | { | |
45 | #ifdef _MSC_VER | |
46 | return (int32_t)__ll_rshift(a, 12); | |
47 | #else | |
48 | return (int32_t)(a >> 12); | |
49 | #endif | |
50 | } | |
51 | ||
52 | static INLINE int64_t fx32_shiftup(const int32_t a) | |
53 | { | |
54 | #ifdef _MSC_VER | |
55 | return __ll_lshift(a, 12); | |
56 | #else | |
57 | return ((int64_t)a) << 12; | |
58 | #endif | |
59 | } | |
60 | ||
61 | #endif |