2 * Copyright 2012-15 Advanced Micro Devices, Inc.
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26 #include "dm_services.h"
30 /* S2D13 value in [-3.00...0.9999] */
31 #define S2D13_MIN (-3 * DIVIDER)
32 #define S2D13_MAX (3 * DIVIDER)
34 uint16_t fixed_point_to_int_frac(
35 struct fixed31_32 arg,
37 uint8_t fractional_bits)
40 int32_t divisor = 1 << fractional_bits;
44 uint16_t d = (uint16_t)dc_fixpt_floor(
48 if (d <= (uint16_t)(1 << integer_bits) - (1 / (uint16_t)divisor))
49 numerator = (uint16_t)dc_fixpt_round(
54 numerator = dc_fixpt_floor(
64 result = (uint16_t)numerator;
67 (1 << (integer_bits + fractional_bits + 1)) + numerator);
69 if ((result != 0) && dc_fixpt_lt(
71 result |= 1 << (integer_bits + fractional_bits);
76 * convert_float_matrix
77 * This converts a double into HW register spec defined format S2D13.
81 void convert_float_matrix(
83 struct fixed31_32 *flt,
86 const struct fixed31_32 min_2_13 =
87 dc_fixpt_from_fraction(S2D13_MIN, DIVIDER);
88 const struct fixed31_32 max_2_13 =
89 dc_fixpt_from_fraction(S2D13_MAX, DIVIDER);
92 for (i = 0; i < buffer_size; ++i) {
94 fixed_point_to_int_frac(
102 matrix[i] = (uint16_t)reg_value;