/usr/include/rem/rem_dsp.h is in librem-dev 0.4.7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | /**
* @file rem_dsp.h DSP routines
*
* Copyright (C) 2010 Creytiv.com
*/
#ifndef UINT8_MAX
#define UINT8_MAX (255U)
#endif
#define INT15_MAX 0x3fff
#define INT15_MIN (-INT15_MAX - 1)
#ifndef INT16_MAX
#define INT16_MAX 0x7fff
#endif
#ifndef INT16_MIN
#define INT16_MIN (-INT16_MAX - 1)
#endif
/* todo: check which preprocessor macros to use */
#if defined (HAVE_ARMV6) || defined (HAVE_NEON)
static inline uint8_t saturate_u8(int32_t a)
{
uint8_t r;
__asm__ __volatile__ ("usat %0, #8, %1" : "=r"(r) : "r"(a));
return r;
}
static inline int16_t saturate_s15(int32_t a)
{
__asm__ __volatile__ ("ssat %0, #15, %1 \n\t"
: "+r"(a)
: "r"(a)
);
return a;
}
static inline int16_t saturate_s16(int32_t a)
{
__asm__ __volatile__ ("ssat %0, #16, %1 \n\t"
: "+r"(a)
: "r"(a)
);
return a;
}
static inline int16_t saturate_add16(int32_t a, int32_t b)
{
__asm__ __volatile__ ("add %0, %1, %2 \n\t"
"ssat %0, #16, %0 \n\t"
:"+r"(a)
:"r"(a), "r"(b)
);
return a;
}
static inline int16_t saturate_sub16(int32_t a, int32_t b)
{
__asm__ __volatile__ ("sub %0, %1, %2 \n\t"
"ssat %0, #16, %0 \n\t"
:"+r"(a)
:"r"(a), "r"(b)
);
return a;
}
#else
static inline uint8_t saturate_u8(int32_t a)
{
return (a > (int32_t)UINT8_MAX) ? UINT8_MAX : ((a < 0) ? 0 : a);
}
static inline int16_t saturate_s15(int32_t a)
{
if (a > INT15_MAX)
return INT15_MAX;
else if (a < INT15_MIN)
return INT15_MIN;
else
return a;
}
static inline int16_t saturate_s16(int32_t a)
{
if (a > INT16_MAX)
return INT16_MAX;
else if (a < INT16_MIN)
return INT16_MIN;
else
return a;
}
static inline int16_t saturate_add16(int32_t a, int32_t b)
{
return saturate_s16(a + b);
}
static inline int16_t saturate_sub16(int32_t a, int32_t b)
{
return saturate_s16(a - b);
}
#endif
#ifdef HAVE_NEON
static inline int ABS32(int a)
{
int r;
__asm__ __volatile__ ("vmov.s32 d0[0], %1 \t\n"
"vabs.s32 d0, d0 \t\n"
"vmov.s32 %0, d0[0] \t\n"
: "=r"(r)
: "r"(a)
);
return a;
}
#else
static inline int ABS32(int a)
{
return a > 0 ? a : -a;
}
#endif
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