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d34a450098
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30208>
46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
/*
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* Copyright 2024 Advanced Micro Devices, Inc.
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*
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* SPDX-License-Identifier: MIT
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*/
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#include "helpers.h"
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bool
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util_lower_clearsize_to_dword(const void *clear_value, int *clear_value_size,
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uint32_t *out)
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{
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/* Reduce a large clear value size if possible. */
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if (*clear_value_size > 4) {
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bool clear_dword_duplicated = true;
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const uint32_t *value = clear_value;
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/* See if we can lower large fills to dword fills. */
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for (unsigned i = 1; i < *clear_value_size / 4; i++) {
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if (value[0] != value[i]) {
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clear_dword_duplicated = false;
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break;
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}
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}
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if (clear_dword_duplicated) {
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*out = *value;
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*clear_value_size = 4;
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}
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return clear_dword_duplicated;
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}
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/* Expand a small clear value size. */
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if (*clear_value_size <= 2) {
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if (*clear_value_size == 1) {
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*out = *(uint8_t *)clear_value;
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*out |=
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(*out << 8) | (*out << 16) | (*out << 24);
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} else {
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*out = *(uint16_t *)clear_value;
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*out |= *out << 16;
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}
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*clear_value_size = 4;
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return true;
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}
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return false;
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}
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