diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dml/calcs/bw_fixed.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dml/calcs/bw_fixed.c | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dml/calcs/bw_fixed.c b/drivers/gpu/drm/amd/display/dc/dml/calcs/bw_fixed.c deleted file mode 100644 index 3aa8dd0ac..000000000 --- a/drivers/gpu/drm/amd/display/dc/dml/calcs/bw_fixed.c +++ /dev/null @@ -1,189 +0,0 @@ -/* - * Copyright 2015 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 "bw_fixed.h" - -#define MAX_I64 \ - ((int64_t)((1ULL << 63) - 1)) - -#define MIN_I64 \ - (-MAX_I64 - 1) - -#define FRACTIONAL_PART_MASK \ - ((1ULL << BW_FIXED_BITS_PER_FRACTIONAL_PART) - 1) - -#define GET_FRACTIONAL_PART(x) \ - (FRACTIONAL_PART_MASK & (x)) - -static uint64_t abs_i64(int64_t arg) -{ - if (arg >= 0) - return (uint64_t)(arg); - else - return (uint64_t)(-arg); -} - -struct bw_fixed bw_int_to_fixed_nonconst(int64_t value) -{ - struct bw_fixed res; - - ASSERT(value < BW_FIXED_MAX_I32 && value > BW_FIXED_MIN_I32); - res.value = value << BW_FIXED_BITS_PER_FRACTIONAL_PART; - return res; -} - -struct bw_fixed bw_frc_to_fixed(int64_t numerator, int64_t denominator) -{ - struct bw_fixed res; - bool arg1_negative = numerator < 0; - bool arg2_negative = denominator < 0; - uint64_t arg1_value; - uint64_t arg2_value; - uint64_t remainder; - - /* determine integer part */ - uint64_t res_value; - - ASSERT(denominator != 0); - - arg1_value = abs_i64(numerator); - arg2_value = abs_i64(denominator); - res_value = div64_u64_rem(arg1_value, arg2_value, &remainder); - - ASSERT(res_value <= BW_FIXED_MAX_I32); - - /* determine fractional part */ - { - uint32_t i = BW_FIXED_BITS_PER_FRACTIONAL_PART; - - do { - remainder <<= 1; - - res_value <<= 1; - - if (remainder >= arg2_value) { - res_value |= 1; - remainder -= arg2_value; - } - } while (--i != 0); - } - - /* round up LSB */ - { - uint64_t summand = (remainder << 1) >= arg2_value; - - ASSERT(res_value <= MAX_I64 - summand); - - res_value += summand; - } - - res.value = (int64_t)(res_value); - - if (arg1_negative ^ arg2_negative) - res.value = -res.value; - return res; -} - -struct bw_fixed bw_floor2( - const struct bw_fixed arg, - const struct bw_fixed significance) -{ - struct bw_fixed result; - int64_t multiplicand; - - multiplicand = div64_s64(arg.value, abs_i64(significance.value)); - result.value = abs_i64(significance.value) * multiplicand; - ASSERT(abs_i64(result.value) <= abs_i64(arg.value)); - return result; -} - -struct bw_fixed bw_ceil2( - const struct bw_fixed arg, - const struct bw_fixed significance) -{ - struct bw_fixed result; - int64_t multiplicand; - - multiplicand = div64_s64(arg.value, abs_i64(significance.value)); - result.value = abs_i64(significance.value) * multiplicand; - if (abs_i64(result.value) < abs_i64(arg.value)) { - if (arg.value < 0) - result.value -= abs_i64(significance.value); - else - result.value += abs_i64(significance.value); - } - return result; -} - -struct bw_fixed bw_mul(const struct bw_fixed arg1, const struct bw_fixed arg2) -{ - struct bw_fixed res; - - bool arg1_negative = arg1.value < 0; - bool arg2_negative = arg2.value < 0; - - uint64_t arg1_value = abs_i64(arg1.value); - uint64_t arg2_value = abs_i64(arg2.value); - - uint64_t arg1_int = BW_FIXED_GET_INTEGER_PART(arg1_value); - uint64_t arg2_int = BW_FIXED_GET_INTEGER_PART(arg2_value); - - uint64_t arg1_fra = GET_FRACTIONAL_PART(arg1_value); - uint64_t arg2_fra = GET_FRACTIONAL_PART(arg2_value); - - uint64_t tmp; - - res.value = arg1_int * arg2_int; - - ASSERT(res.value <= BW_FIXED_MAX_I32); - - res.value <<= BW_FIXED_BITS_PER_FRACTIONAL_PART; - - tmp = arg1_int * arg2_fra; - - ASSERT(tmp <= (uint64_t)(MAX_I64 - res.value)); - - res.value += tmp; - - tmp = arg2_int * arg1_fra; - - ASSERT(tmp <= (uint64_t)(MAX_I64 - res.value)); - - res.value += tmp; - - tmp = arg1_fra * arg2_fra; - - tmp = (tmp >> BW_FIXED_BITS_PER_FRACTIONAL_PART) + - (tmp >= (uint64_t)(bw_frc_to_fixed(1, 2).value)); - - ASSERT(tmp <= (uint64_t)(MAX_I64 - res.value)); - - res.value += tmp; - - if (arg1_negative ^ arg2_negative) - res.value = -res.value; - return res; -} - |