1 /* Copyright (C) 2010-2020 The RetroArch team
3 * ---------------------------------------------------------------------------------------
4 * The following license statement only applies to this file (vector_2.h).
5 * ---------------------------------------------------------------------------------------
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:
13 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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,
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20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 #ifndef __LIBRETRO_SDK_GFX_MATH_VECTOR_2_H__
24 #define __LIBRETRO_SDK_GFX_MATH_VECTOR_2_H__
29 #include <retro_common_api.h>
30 #include <retro_inline.h>
34 typedef float vec2_t[2];
36 #define vec2_dot(a, b) ((a[0] * b[0]) + (a[1] * b[1]))
38 #define vec2_cross(a, b) ((a[0]*b[1]) - (a[1]*b[0]))
40 #define vec2_add(dst, src) \
44 #define vec2_subtract(dst, src) \
48 #define vec2_copy(dst, src) \
52 static INLINE float overflow(void)
55 volatile float f = 1e10;
57 for (i = 0; i < 10; ++i)
62 static INLINE int16_t tofloat16(float f)
74 s = (i >> 16) & 0x00008000;
75 e = ((i >> 23) & 0x000000ff) - (127 - 15);
83 m = (m | 0x00800000) >> (1 - e);
88 return (int16_t)(s | (m >> 13));
91 if (e == 0xff - (127 - 15))
94 return (int16_t)(s | 0x7c00);
98 return (int16_t)(s | 0x7c00 | m | (m == 0));
116 return (int16_t)(s | 0x7c00);
119 return (int16_t)(s | (e << 10) | (m >> 13));
122 static INLINE unsigned int vec2_packHalf2x16(float vec0, float vec1)
130 u.in[0] = tofloat16(vec0);
131 u.in[1] = tofloat16(vec1);