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d3cfb2fb77
The goal of this patch is to make isa-l testsuite pass on s390 with minimal changes to the library. The one and only reason isa-l does not work on s390 at the moment is that s390 is big-endian, and isa-l assumes little-endian at a lot of places. There are two flavors of this: loading/storing integers from/to memory, and overlapping structs. Loads/stores are already helpfully wrapped by unaligned.h header, so replace the functions there with endianness-aware variants. Solve struct member overlap by reversing their order on big-endian. Also, fix a couple of usages of uninitialized memory in the testsuite (found with MemorySanitizer). Fixes s390x part of #188. Change-Id: Iaf14a113bd266900192cc8b44212f8a47a8c7753 Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
#ifndef ENCODE_DF_H
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#define ENCODE_DF_H
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#include <stdint.h>
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#include "igzip_lib.h"
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#include "huff_codes.h"
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/* Deflate Intermediate Compression Format */
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#define LIT_LEN_BIT_COUNT 10
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#define LIT_LEN_MASK ((1 << LIT_LEN_BIT_COUNT) - 1)
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#define DIST_LIT_BIT_COUNT 9
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#define DIST_LIT_MASK ((1 << DIST_LIT_BIT_COUNT) - 1)
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#define ICF_DIST_OFFSET LIT_LEN_BIT_COUNT
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#define NULL_DIST_SYM 30
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#define LEN_START ISAL_DEF_LIT_SYMBOLS
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#define LEN_OFFSET (LEN_START - ISAL_DEF_MIN_MATCH)
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#define LEN_MAX (LEN_OFFSET + ISAL_DEF_MAX_MATCH)
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#define LIT_START (NULL_DIST_SYM + 1)
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#define ICF_CODE_LEN 32
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struct deflate_icf {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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uint32_t lit_len:LIT_LEN_BIT_COUNT;
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uint32_t lit_dist:DIST_LIT_BIT_COUNT;
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uint32_t dist_extra:ICF_CODE_LEN - DIST_LIT_BIT_COUNT - ICF_DIST_OFFSET;
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#else
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uint32_t dist_extra:ICF_CODE_LEN - DIST_LIT_BIT_COUNT - ICF_DIST_OFFSET;
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uint32_t lit_dist:DIST_LIT_BIT_COUNT;
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uint32_t lit_len:LIT_LEN_BIT_COUNT;
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#endif
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};
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struct deflate_icf *encode_deflate_icf(struct deflate_icf *next_in, struct deflate_icf *end_in,
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struct BitBuf2 *bb, struct hufftables_icf *hufftables);
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#endif
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