diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dml/calcs/custom_float.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dml/calcs/custom_float.c | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dml/calcs/custom_float.c b/drivers/gpu/drm/amd/display/dc/dml/calcs/custom_float.c deleted file mode 100644 index 31d167bc5..000000000 --- a/drivers/gpu/drm/amd/display/dc/dml/calcs/custom_float.c +++ /dev/null @@ -1,197 +0,0 @@ -/* - * Copyright 2017 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 "custom_float.h" - - -static bool build_custom_float( - struct fixed31_32 value, - const struct custom_float_format *format, - bool *negative, - uint32_t *mantissa, - uint32_t *exponenta) -{ - uint32_t exp_offset = (1 << (format->exponenta_bits - 1)) - 1; - - const struct fixed31_32 mantissa_constant_plus_max_fraction = - dc_fixpt_from_fraction( - (1LL << (format->mantissa_bits + 1)) - 1, - 1LL << format->mantissa_bits); - - struct fixed31_32 mantiss; - - if (dc_fixpt_eq( - value, - dc_fixpt_zero)) { - *negative = false; - *mantissa = 0; - *exponenta = 0; - return true; - } - - if (dc_fixpt_lt( - value, - dc_fixpt_zero)) { - *negative = format->sign; - value = dc_fixpt_neg(value); - } else { - *negative = false; - } - - if (dc_fixpt_lt( - value, - dc_fixpt_one)) { - uint32_t i = 1; - - do { - value = dc_fixpt_shl(value, 1); - ++i; - } while (dc_fixpt_lt( - value, - dc_fixpt_one)); - - --i; - - if (exp_offset <= i) { - *mantissa = 0; - *exponenta = 0; - return true; - } - - *exponenta = exp_offset - i; - } else if (dc_fixpt_le( - mantissa_constant_plus_max_fraction, - value)) { - uint32_t i = 1; - - do { - value = dc_fixpt_shr(value, 1); - ++i; - } while (dc_fixpt_lt( - mantissa_constant_plus_max_fraction, - value)); - - *exponenta = exp_offset + i - 1; - } else { - *exponenta = exp_offset; - } - - mantiss = dc_fixpt_sub( - value, - dc_fixpt_one); - - if (dc_fixpt_lt( - mantiss, - dc_fixpt_zero) || - dc_fixpt_lt( - dc_fixpt_one, - mantiss)) - mantiss = dc_fixpt_zero; - else - mantiss = dc_fixpt_shl( - mantiss, - format->mantissa_bits); - - *mantissa = dc_fixpt_floor(mantiss); - - return true; -} - -static bool setup_custom_float( - const struct custom_float_format *format, - bool negative, - uint32_t mantissa, - uint32_t exponenta, - uint32_t *result) -{ - uint32_t i = 0; - uint32_t j = 0; - - uint32_t value = 0; - - /* verification code: - * once calculation is ok we can remove it - */ - - const uint32_t mantissa_mask = - (1 << (format->mantissa_bits + 1)) - 1; - - const uint32_t exponenta_mask = - (1 << (format->exponenta_bits + 1)) - 1; - - if (mantissa & ~mantissa_mask) { - BREAK_TO_DEBUGGER(); - mantissa = mantissa_mask; - } - - if (exponenta & ~exponenta_mask) { - BREAK_TO_DEBUGGER(); - exponenta = exponenta_mask; - } - - /* end of verification code */ - - while (i < format->mantissa_bits) { - uint32_t mask = 1 << i; - - if (mantissa & mask) - value |= mask; - - ++i; - } - - while (j < format->exponenta_bits) { - uint32_t mask = 1 << j; - - if (exponenta & mask) - value |= mask << i; - - ++j; - } - - if (negative && format->sign) - value |= 1 << (i + j); - - *result = value; - - return true; -} - -bool convert_to_custom_float_format( - struct fixed31_32 value, - const struct custom_float_format *format, - uint32_t *result) -{ - uint32_t mantissa; - uint32_t exponenta; - bool negative; - - return build_custom_float( - value, format, &negative, &mantissa, &exponenta) && - setup_custom_float( - format, negative, mantissa, exponenta, result); -} - - |