42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
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Directory overview:
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===================
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src assembler sources for gcc/gas
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d_asm1 sources converted for masm/tasm/wasm
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d_asm2 sources converted for masm/tasm/wasm (in a `db' format)
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d_asm3 sources converted for nasm (in a `db' format)
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Notes:
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======
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- The assembler sources are designed for a flat 32 bit memory model
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running in protected mode - they should work with most i386
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32-bit compilers.
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- All functions expect a `cdecl' (C stack based) calling convention.
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The function return value will be placed into `eax'.
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All other registers are preserved.
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- There are no prototypes for the assembler functions - copy them
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from ltest/asm.h if you need some.
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- For reasons of speed all fast assembler decompressors (having `_fast'
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in their name) can access (write to) up to 3 bytes past the end of
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the decompressed (output) block. Data past the end of the compressed
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(input) block is never accessed (read from).
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See also LZO.FAQ
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- The assembler functions are not available in a Windows or OS/2 DLL because
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I don't know how to generate the necessary DLL export information.
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- You should prefer the sources in `d_asm2' over those in `d_asm1' - many
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assemblers insert their own alignment instructions or perform some
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other kinds of "optimizations".
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- Finally you should test if the assembler versions are actually faster
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than the C version on your machine - some compilers can do a very good
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optimization job, and they also can optimize the code for a specific
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processor type.
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