| /* |
| * Copyright (c) 2021 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef PAS_LINE_WORD_CONFIG_H |
| #define PAS_LINE_WORD_CONFIG_H |
| |
| #include "pas_log.h" |
| #include "pas_utils.h" |
| |
| PAS_BEGIN_EXTERN_C; |
| |
| struct pas_line_word_config; |
| typedef struct pas_line_word_config pas_line_word_config; |
| |
| struct pas_line_word_config { |
| uint64_t (*get_line_word)(unsigned* alloc_bits, size_t line_index); |
| void (*set_line_word)(unsigned* alloc_bits, size_t line_index, uint64_t value); |
| uint64_t (*count_low_zeroes)(uint64_t value); |
| uint64_t (*count_high_zeroes)(uint64_t value); |
| }; |
| |
| #define PAS_LINE_WORD_CONFIG_DEFINE_FUNCTIONS(bits_per_line_word) \ |
| static PAS_ALWAYS_INLINE uint64_t \ |
| pas_line_word_config_get_line_word_ ## bits_per_line_word ## _bit( \ |
| unsigned* alloc_bits, size_t line_index) \ |
| { \ |
| return ((uint ## bits_per_line_word ## _t*)alloc_bits)[line_index]; \ |
| } \ |
| \ |
| static PAS_ALWAYS_INLINE void \ |
| pas_line_word_config_set_line_word_ ## bits_per_line_word ## _bit( \ |
| unsigned* alloc_bits, size_t line_index, uint64_t value) \ |
| { \ |
| static const bool verbose = false; \ |
| if (verbose) \ |
| pas_log("Setting %p[%zu] := %llx\n", alloc_bits, line_index, value); \ |
| ((uint ## bits_per_line_word ## _t*)alloc_bits)[line_index] = \ |
| (uint ## bits_per_line_word ## _t)value; \ |
| } |
| |
| PAS_LINE_WORD_CONFIG_DEFINE_FUNCTIONS(8); |
| PAS_LINE_WORD_CONFIG_DEFINE_FUNCTIONS(16); |
| PAS_LINE_WORD_CONFIG_DEFINE_FUNCTIONS(32); |
| PAS_LINE_WORD_CONFIG_DEFINE_FUNCTIONS(64); |
| |
| static PAS_ALWAYS_INLINE uint64_t |
| pas_line_word_config_count_low_zeroes_8_bit(uint64_t value) |
| { |
| return __builtin_ctz((unsigned)value); |
| } |
| |
| static PAS_ALWAYS_INLINE uint64_t |
| pas_line_word_config_count_high_zeroes_8_bit(uint64_t value) |
| { |
| unsigned leading_zeroes; |
| leading_zeroes = __builtin_clz((unsigned)(value & 0xff)); |
| PAS_TESTING_ASSERT(leading_zeroes >= 24); |
| return leading_zeroes - 24; |
| } |
| |
| static PAS_ALWAYS_INLINE uint64_t |
| pas_line_word_config_count_low_zeroes_16_bit(uint64_t value) |
| { |
| return __builtin_ctz((unsigned)value); |
| } |
| |
| static PAS_ALWAYS_INLINE uint64_t |
| pas_line_word_config_count_high_zeroes_16_bit(uint64_t value) |
| { |
| unsigned leading_zeroes; |
| leading_zeroes = __builtin_clz((unsigned)(value & 0xffff)); |
| PAS_TESTING_ASSERT(leading_zeroes >= 16); |
| return leading_zeroes - 16; |
| } |
| |
| static PAS_ALWAYS_INLINE uint64_t |
| pas_line_word_config_count_low_zeroes_32_bit(uint64_t value) |
| { |
| return __builtin_ctz((unsigned)value); |
| } |
| |
| static PAS_ALWAYS_INLINE uint64_t |
| pas_line_word_config_count_high_zeroes_32_bit(uint64_t value) |
| { |
| return __builtin_clz((unsigned)value); |
| } |
| |
| static PAS_ALWAYS_INLINE uint64_t |
| pas_line_word_config_count_low_zeroes_64_bit(uint64_t value) |
| { |
| return __builtin_ctzll(value); |
| } |
| |
| static PAS_ALWAYS_INLINE uint64_t |
| pas_line_word_config_count_high_zeroes_64_bit(uint64_t value) |
| { |
| return __builtin_clzll(value); |
| } |
| |
| static PAS_ALWAYS_INLINE void pas_line_word_config_construct(pas_line_word_config* config, |
| size_t bits_per_line_word) |
| { |
| |
| #define PAS_LINE_WORD_CONFIG_CONSTRUCT_CASE(bits_per_line_word) \ |
| case bits_per_line_word: \ |
| config->get_line_word = pas_line_word_config_get_line_word_ ## bits_per_line_word ## _bit; \ |
| config->set_line_word = pas_line_word_config_set_line_word_ ## bits_per_line_word ## _bit; \ |
| config->count_low_zeroes = \ |
| pas_line_word_config_count_low_zeroes_ ## bits_per_line_word ## _bit; \ |
| config->count_high_zeroes = \ |
| pas_line_word_config_count_high_zeroes_ ## bits_per_line_word ## _bit; \ |
| break; |
| |
| switch (bits_per_line_word) { |
| PAS_LINE_WORD_CONFIG_CONSTRUCT_CASE(8); |
| PAS_LINE_WORD_CONFIG_CONSTRUCT_CASE(16); |
| PAS_LINE_WORD_CONFIG_CONSTRUCT_CASE(32); |
| PAS_LINE_WORD_CONFIG_CONSTRUCT_CASE(64); |
| default: |
| PAS_ASSERT(!"Bad value for bits_per_line_word"); |
| break; |
| } |
| } |
| |
| PAS_END_EXTERN_C; |
| |
| #endif /* PAS_LINE_WORD_CONFIG_H */ |
| |