5 As writing portable assembler sources supporting different operating
6 systems, compilers and assemblers has proven to be extremely painful,
7 the assembler sources have been converted into a more portable 'db'
8 format. Use these whenever possible.
10 src_gas sources converted for portable gcc/gas syntax
11 src_masm sources converted for portable masm/tasm/wasm syntax
12 src_nasm sources converted for portable nasm syntax
14 src assembler sources (you need the OpenSource nasm assembler)
16 obj pre-assembled object files
18 Also look 'src_XXX/all/asm_all.asm' which contains all assembler
19 functions conveniently arranged into a single file.
25 - The assembler sources are designed for a flat 32-bit memory model
26 running in protected mode - they should work with all i386
27 32-bit compilers around.
29 - All functions expect a 'cdecl' (C stack based) calling convention.
30 The function return value will be placed into 'eax'.
31 All other registers are preserved.
33 - Prototypes for the assembler functions can be found in <lzo/lzo_asm.h>.
35 - For reasons of speed all fast assembler decompressors (having '_fast'
36 in their name) can access (write to) up to 3 bytes past the end of
37 the decompressed (output) block. Data past the end of the compressed
38 (input) block is never accessed (read from).
39 [ technical note: because data is transferred in 32-bit units ]
41 - Finally you should test if the assembler versions are actually faster
42 than the C version on your machine - some compilers can do a very good
43 optimization job, and they also can optimize the code for a specific