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author | thegeorg <thegeorg@yandex-team.ru> | 2022-05-07 11:12:39 +0300 |
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committer | thegeorg <thegeorg@yandex-team.ru> | 2022-05-07 11:12:39 +0300 |
commit | a0c9cd069ff45244eeb9caa2fcadf1e9bc4a840d (patch) | |
tree | c9a178299041ce75a8b6d3edb644521c0f13c092 /contrib/libs/lzma/liblzma/simple/ia64.c | |
parent | d47cdd245c4b49c8e273c80a2e2b29ee5b2071c3 (diff) | |
download | ydb-a0c9cd069ff45244eeb9caa2fcadf1e9bc4a840d.tar.gz |
Improve layout of contrib/libs/lzma
* Rename contrib/libs/xz to contrib/libs/lzma (yamaker project is updated accordingly)
* Move xz/liblzma/ya.make to top level
* Update provides.pbtxt and PEERDIRs as necessary
ref:1bb07a87b6adb738965483167fa64e7ad5da1e2b
Diffstat (limited to 'contrib/libs/lzma/liblzma/simple/ia64.c')
-rw-r--r-- | contrib/libs/lzma/liblzma/simple/ia64.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/contrib/libs/lzma/liblzma/simple/ia64.c b/contrib/libs/lzma/liblzma/simple/ia64.c new file mode 100644 index 0000000000..6492d0a384 --- /dev/null +++ b/contrib/libs/lzma/liblzma/simple/ia64.c @@ -0,0 +1,112 @@ +/////////////////////////////////////////////////////////////////////////////// +// +/// \file ia64.c +/// \brief Filter for IA64 (Itanium) binaries +/// +// Authors: Igor Pavlov +// Lasse Collin +// +// This file has been put into the public domain. +// You can do whatever you want with this file. +// +/////////////////////////////////////////////////////////////////////////////// + +#include "simple_private.h" + + +static size_t +ia64_code(void *simple lzma_attribute((__unused__)), + uint32_t now_pos, bool is_encoder, + uint8_t *buffer, size_t size) +{ + static const uint32_t BRANCH_TABLE[32] = { + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 4, 4, 6, 6, 0, 0, 7, 7, + 4, 4, 0, 0, 4, 4, 0, 0 + }; + + size_t i; + for (i = 0; i + 16 <= size; i += 16) { + const uint32_t instr_template = buffer[i] & 0x1F; + const uint32_t mask = BRANCH_TABLE[instr_template]; + uint32_t bit_pos = 5; + + for (size_t slot = 0; slot < 3; ++slot, bit_pos += 41) { + if (((mask >> slot) & 1) == 0) + continue; + + const size_t byte_pos = (bit_pos >> 3); + const uint32_t bit_res = bit_pos & 0x7; + uint64_t instruction = 0; + + for (size_t j = 0; j < 6; ++j) + instruction += (uint64_t)( + buffer[i + j + byte_pos]) + << (8 * j); + + uint64_t inst_norm = instruction >> bit_res; + + if (((inst_norm >> 37) & 0xF) == 0x5 + && ((inst_norm >> 9) & 0x7) == 0 + /* && (inst_norm & 0x3F)== 0 */ + ) { + uint32_t src = (uint32_t)( + (inst_norm >> 13) & 0xFFFFF); + src |= ((inst_norm >> 36) & 1) << 20; + + src <<= 4; + + uint32_t dest; + if (is_encoder) + dest = now_pos + (uint32_t)(i) + src; + else + dest = src - (now_pos + (uint32_t)(i)); + + dest >>= 4; + + inst_norm &= ~((uint64_t)(0x8FFFFF) << 13); + inst_norm |= (uint64_t)(dest & 0xFFFFF) << 13; + inst_norm |= (uint64_t)(dest & 0x100000) + << (36 - 20); + + instruction &= (1U << bit_res) - 1; + instruction |= (inst_norm << bit_res); + + for (size_t j = 0; j < 6; j++) + buffer[i + j + byte_pos] = (uint8_t)( + instruction + >> (8 * j)); + } + } + } + + return i; +} + + +static lzma_ret +ia64_coder_init(lzma_next_coder *next, const lzma_allocator *allocator, + const lzma_filter_info *filters, bool is_encoder) +{ + return lzma_simple_coder_init(next, allocator, filters, + &ia64_code, 0, 16, 16, is_encoder); +} + + +extern lzma_ret +lzma_simple_ia64_encoder_init(lzma_next_coder *next, + const lzma_allocator *allocator, + const lzma_filter_info *filters) +{ + return ia64_coder_init(next, allocator, filters, true); +} + + +extern lzma_ret +lzma_simple_ia64_decoder_init(lzma_next_coder *next, + const lzma_allocator *allocator, + const lzma_filter_info *filters) +{ + return ia64_coder_init(next, allocator, filters, false); +} |