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80be3f1 Feb 23, 2016
@PaulStoffregen @FrankBoesing
355 lines (320 sloc) 12.2 KB
/* Audio Library for Teensy 3.X
* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
*
* Development of this audio library was funded by PJRC.COM, LLC by sales of
* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
* open source software by purchasing Teensy or other PJRC products.
*
* 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, development funding 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.
*/
#ifndef dspinst_h_
#define dspinst_h_
#include <stdint.h>
// computes limit((val >> rshift), 2**bits)
static inline int32_t signed_saturate_rshift(int32_t val, int bits, int rshift) __attribute__((always_inline, unused));
static inline int32_t signed_saturate_rshift(int32_t val, int bits, int rshift)
{
#if defined(KINETISK)
int32_t out;
asm volatile("ssat %0, %1, %2, asr %3" : "=r" (out) : "I" (bits), "r" (val), "I" (rshift));
return out;
#elif defined(KINETISL)
int32_t out, max;
out = val >> rshift;
max = 1 << (bits - 1);
if (out >= 0) {
if (out > max - 1) out = max - 1;
} else {
if (out < -max) out = -max;
}
return out;
#endif
}
// computes limit(val, 2**bits)
static inline int16_t saturate16(int32_t val) __attribute__((always_inline, unused));
static inline int16_t saturate16(int32_t val)
{
#if defined(KINETISK)
int16_t out;
int32_t tmp;
asm volatile("ssat %0, %1, %2" : "=r" (tmp) : "I" (16), "r" (val) );
out = (int16_t) (tmp & 0xffff); // not sure if the & 0xffff is necessary. test.
return out;
#elif defined(KINETISL)
return 0; // TODO....
#endif
}
// computes ((a[31:0] * b[15:0]) >> 16)
static inline int32_t signed_multiply_32x16b(int32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t signed_multiply_32x16b(int32_t a, uint32_t b)
{
#if defined(KINETISK)
int32_t out;
asm volatile("smulwb %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
#elif defined(KINETISL)
return ((int64_t)a * (int16_t)(b & 0xFFFF)) >> 16;
#endif
}
// computes ((a[31:0] * b[31:16]) >> 16)
static inline int32_t signed_multiply_32x16t(int32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t signed_multiply_32x16t(int32_t a, uint32_t b)
{
#if defined(KINETISK)
int32_t out;
asm volatile("smulwt %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
#elif defined(KINETISL)
return ((int64_t)a * (int16_t)(b >> 16)) >> 16;
#endif
}
// computes (((int64_t)a[31:0] * (int64_t)b[31:0]) >> 32)
static inline int32_t multiply_32x32_rshift32(int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline int32_t multiply_32x32_rshift32(int32_t a, int32_t b)
{
#if defined(KINETISK)
int32_t out;
asm volatile("smmul %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
#elif defined(KINETISL)
return 0; // TODO....
#endif
}
// computes (((int64_t)a[31:0] * (int64_t)b[31:0] + 0x8000000) >> 32)
static inline int32_t multiply_32x32_rshift32_rounded(int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline int32_t multiply_32x32_rshift32_rounded(int32_t a, int32_t b)
{
#if defined(KINETISK)
int32_t out;
asm volatile("smmulr %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
#elif defined(KINETISL)
return 0; // TODO....
#endif
}
// computes sum + (((int64_t)a[31:0] * (int64_t)b[31:0] + 0x8000000) >> 32)
static inline int32_t multiply_accumulate_32x32_rshift32_rounded(int32_t sum, int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline int32_t multiply_accumulate_32x32_rshift32_rounded(int32_t sum, int32_t a, int32_t b)
{
#if defined(KINETISK)
int32_t out;
asm volatile("smmlar %0, %2, %3, %1" : "=r" (out) : "r" (sum), "r" (a), "r" (b));
return out;
#elif defined(KINETISL)
return 0; // TODO....
#endif
}
// computes sum - (((int64_t)a[31:0] * (int64_t)b[31:0] + 0x8000000) >> 32)
static inline int32_t multiply_subtract_32x32_rshift32_rounded(int32_t sum, int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline int32_t multiply_subtract_32x32_rshift32_rounded(int32_t sum, int32_t a, int32_t b)
{
#if defined(KINETISK)
int32_t out;
asm volatile("smmlsr %0, %2, %3, %1" : "=r" (out) : "r" (sum), "r" (a), "r" (b));
return out;
#elif defined(KINETISL)
return 0; // TODO....
#endif
}
// computes (a[31:16] | (b[31:16] >> 16))
static inline uint32_t pack_16t_16t(int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline uint32_t pack_16t_16t(int32_t a, int32_t b)
{
#if defined(KINETISK)
int32_t out;
asm volatile("pkhtb %0, %1, %2, asr #16" : "=r" (out) : "r" (a), "r" (b));
return out;
#elif defined(KINETISL)
return (a & 0xFFFF0000) | ((uint32_t)b >> 16);
#endif
}
// computes (a[31:16] | b[15:0])
static inline uint32_t pack_16t_16b(int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline uint32_t pack_16t_16b(int32_t a, int32_t b)
{
#if defined(KINETISK)
int32_t out;
asm volatile("pkhtb %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
#elif defined(KINETISL)
return (a & 0xFFFF0000) | (b & 0x0000FFFF);
#endif
}
// computes ((a[15:0] << 16) | b[15:0])
static inline uint32_t pack_16b_16b(int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline uint32_t pack_16b_16b(int32_t a, int32_t b)
{
#if defined(KINETISK)
int32_t out;
asm volatile("pkhbt %0, %1, %2, lsl #16" : "=r" (out) : "r" (b), "r" (a));
return out;
#elif defined(KINETISL)
return (a << 16) | (b & 0x0000FFFF);
#endif
}
// computes ((a[15:0] << 16) | b[15:0])
/*
static inline uint32_t pack_16x16(int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline uint32_t pack_16x16(int32_t a, int32_t b)
{
int32_t out;
asm volatile("pkhbt %0, %1, %2, lsl #16" : "=r" (out) : "r" (b), "r" (a));
return out;
}
*/
// computes (((a[31:16] + b[31:16]) << 16) | (a[15:0 + b[15:0])) (saturates)
static inline uint32_t signed_add_16_and_16(uint32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline uint32_t signed_add_16_and_16(uint32_t a, uint32_t b)
{
int32_t out;
asm volatile("qadd16 %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
// computes (((a[31:16] - b[31:16]) << 16) | (a[15:0 - b[15:0])) (saturates)
static inline int32_t signed_subtract_16_and_16(int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline int32_t signed_subtract_16_and_16(int32_t a, int32_t b)
{
int32_t out;
asm volatile("qsub16 %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
// computes out = (((a[31:16]+b[31:16])/2) <<16) | ((a[15:0]+b[15:0])/2)
static inline int32_t signed_halving_add_16_and_16(int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline int32_t signed_halving_add_16_and_16(int32_t a, int32_t b)
{
int32_t out;
asm volatile("shadd16 %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
// computes out = (((a[31:16]-b[31:16])/2) <<16) | ((a[15:0]-b[15:0])/2)
static inline int32_t signed_halving_subtract_16_and_16(int32_t a, int32_t b) __attribute__((always_inline, unused));
static inline int32_t signed_halving_subtract_16_and_16(int32_t a, int32_t b)
{
int32_t out;
asm volatile("shsub16 %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
// computes (sum + ((a[31:0] * b[15:0]) >> 16))
static inline int32_t signed_multiply_accumulate_32x16b(int32_t sum, int32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t signed_multiply_accumulate_32x16b(int32_t sum, int32_t a, uint32_t b)
{
int32_t out;
asm volatile("smlawb %0, %2, %3, %1" : "=r" (out) : "r" (sum), "r" (a), "r" (b));
return out;
}
// computes (sum + ((a[31:0] * b[31:16]) >> 16))
static inline int32_t signed_multiply_accumulate_32x16t(int32_t sum, int32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t signed_multiply_accumulate_32x16t(int32_t sum, int32_t a, uint32_t b)
{
int32_t out;
asm volatile("smlawt %0, %2, %3, %1" : "=r" (out) : "r" (sum), "r" (a), "r" (b));
return out;
}
// computes logical and, forces compiler to allocate register and use single cycle instruction
static inline uint32_t logical_and(uint32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline uint32_t logical_and(uint32_t a, uint32_t b)
{
asm volatile("and %0, %1" : "+r" (a) : "r" (b));
return a;
}
// computes ((a[15:0] * b[15:0]) + (a[31:16] * b[31:16]))
static inline int32_t multiply_16tx16t_add_16bx16b(uint32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t multiply_16tx16t_add_16bx16b(uint32_t a, uint32_t b)
{
int32_t out;
asm volatile("smuad %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
// computes ((a[15:0] * b[31:16]) + (a[31:16] * b[15:0]))
static inline int32_t multiply_16tx16b_add_16bx16t(uint32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t multiply_16tx16b_add_16bx16t(uint32_t a, uint32_t b)
{
int32_t out;
asm volatile("smuadx %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
// // computes sum += ((a[15:0] * b[15:0]) + (a[31:16] * b[31:16]))
static inline int64_t multiply_accumulate_16tx16t_add_16bx16b(int64_t sum, uint32_t a, uint32_t b)
{
asm volatile("smlald %Q0, %R0, %1, %2" : "+r" (sum) : "r" (a), "r" (b));
return sum;
}
// // computes sum += ((a[15:0] * b[31:16]) + (a[31:16] * b[15:0]))
static inline int64_t multiply_accumulate_16tx16b_add_16bx16t(int64_t sum, uint32_t a, uint32_t b)
{
asm volatile("smlaldx %Q0, %R0, %1, %2" : "+r" (sum) : "r" (a), "r" (b));
return sum;
}
// computes ((a[15:0] * b[15:0])
static inline int32_t multiply_16bx16b(uint32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t multiply_16bx16b(uint32_t a, uint32_t b)
{
int32_t out;
asm volatile("smulbb %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
// computes ((a[15:0] * b[31:16])
static inline int32_t multiply_16bx16t(uint32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t multiply_16bx16t(uint32_t a, uint32_t b)
{
int32_t out;
asm volatile("smulbt %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
// computes ((a[31:16] * b[15:0])
static inline int32_t multiply_16tx16b(uint32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t multiply_16tx16b(uint32_t a, uint32_t b)
{
int32_t out;
asm volatile("smultb %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
// computes ((a[31:16] * b[31:16])
static inline int32_t multiply_16tx16t(uint32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t multiply_16tx16t(uint32_t a, uint32_t b)
{
int32_t out;
asm volatile("smultt %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
// computes (a - b), result saturated to 32 bit integer range
static inline int32_t substract_32_saturate(uint32_t a, uint32_t b) __attribute__((always_inline, unused));
static inline int32_t substract_32_saturate(uint32_t a, uint32_t b)
{
int32_t out;
asm volatile("qsub %0, %1, %2" : "=r" (out) : "r" (a), "r" (b));
return out;
}
//get Q from PSR
static inline uint32_t get_q_psr(void) __attribute__((always_inline, unused));
static inline uint32_t get_q_psr(void)
{
uint32_t out;
asm ("mrs %0, APSR" : "=r" (out));
return (out & 0x8000000)>>27;
}
//clear Q BIT in PSR
static inline void clr_q_psr(void) __attribute__((always_inline, unused));
static inline void clr_q_psr(void)
{
uint32_t t;
asm ("mov %[t],#0\n"
"msr APSR_nzcvq,%0\n" : [t] "=&r" (t)::"cc");
}
#endif