Contributors: 7
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Harry Wentland |
365 |
74.49% |
2 |
22.22% |
| Alvin lee |
87 |
17.76% |
1 |
11.11% |
| Dmytro Laktyushkin |
14 |
2.86% |
1 |
11.11% |
| Tom St Denis |
10 |
2.04% |
1 |
11.11% |
| Jammy Zhou |
10 |
2.04% |
1 |
11.11% |
| Lee Jones |
3 |
0.61% |
2 |
22.22% |
| rodrigosiqueira |
1 |
0.20% |
1 |
11.11% |
| Total |
490 |
|
9 |
|
/*
* Copyright 2012-15 Advanced Micro Devices, Inc.
*
* 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*
* Authors: AMD
*
*/
#include "dm_services.h"
#include "basics/conversion.h"
#define DIVIDER 10000
/* S2D13 value in [-3.00...0.9999] */
#define S2D13_MIN (-3 * DIVIDER)
#define S2D13_MAX (3 * DIVIDER)
uint16_t fixed_point_to_int_frac(
struct fixed31_32 arg,
uint8_t integer_bits,
uint8_t fractional_bits)
{
int32_t numerator;
int32_t divisor = 1 << fractional_bits;
uint16_t result;
uint16_t d = (uint16_t)dc_fixpt_floor(
dc_fixpt_abs(
arg));
if (d <= (uint16_t)(1 << integer_bits) - (1 / (uint16_t)divisor))
numerator = (uint16_t)dc_fixpt_round(
dc_fixpt_mul_int(
arg,
divisor));
else {
numerator = dc_fixpt_floor(
dc_fixpt_sub(
dc_fixpt_from_int(
1LL << integer_bits),
dc_fixpt_recip(
dc_fixpt_from_int(
divisor))));
}
if (numerator >= 0)
result = (uint16_t)numerator;
else
result = (uint16_t)(
(1 << (integer_bits + fractional_bits + 1)) + numerator);
if ((result != 0) && dc_fixpt_lt(
arg, dc_fixpt_zero))
result |= 1 << (integer_bits + fractional_bits);
return result;
}
/*
* convert_float_matrix - This converts a double into HW register spec defined format S2D13.
*/
void convert_float_matrix(
uint16_t *matrix,
struct fixed31_32 *flt,
uint32_t buffer_size)
{
const struct fixed31_32 min_2_13 =
dc_fixpt_from_fraction(S2D13_MIN, DIVIDER);
const struct fixed31_32 max_2_13 =
dc_fixpt_from_fraction(S2D13_MAX, DIVIDER);
uint32_t i;
for (i = 0; i < buffer_size; ++i) {
uint32_t reg_value =
fixed_point_to_int_frac(
dc_fixpt_clamp(
flt[i],
min_2_13,
max_2_13),
2,
13);
matrix[i] = (uint16_t)reg_value;
}
}
static struct fixed31_32 int_frac_to_fixed_point(uint16_t arg,
uint8_t integer_bits,
uint8_t fractional_bits)
{
struct fixed31_32 result;
uint16_t sign_mask = 1 << (fractional_bits + integer_bits);
uint16_t value_mask = sign_mask - 1;
result.value = (long long)(arg & value_mask) <<
(FIXED31_32_BITS_PER_FRACTIONAL_PART - fractional_bits);
if (arg & sign_mask)
result = dc_fixpt_neg(result);
return result;
}
/**
* convert_hw_matrix - converts HW values into fixed31_32 matrix.
* @matrix: fixed point 31.32 matrix
* @reg: array of register values
* @buffer_size: size of the array of register values
*
* Converts HW register spec defined format S2D13 into a fixed-point 31.32
* matrix.
*/
void convert_hw_matrix(struct fixed31_32 *matrix,
uint16_t *reg,
uint32_t buffer_size)
{
for (int i = 0; i < buffer_size; ++i)
matrix[i] = int_frac_to_fixed_point(reg[i], 2, 13);
}
static uint32_t find_gcd(uint32_t a, uint32_t b)
{
uint32_t remainder;
while (b != 0) {
remainder = a % b;
a = b;
b = remainder;
}
return a;
}
void reduce_fraction(uint32_t num, uint32_t den,
uint32_t *out_num, uint32_t *out_den)
{
uint32_t gcd = 0;
gcd = find_gcd(num, den);
*out_num = num / gcd;
*out_den = den / gcd;
}