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authorArne Schwabe <arne@rfc2549.org>2017-12-28 00:30:40 +0100
committerArne Schwabe <arne@rfc2549.org>2017-12-28 00:30:40 +0100
commit2b2dee6586048e62d066a3ea7b761649828b3aff (patch)
treee4afa9c4e225cf808a179dac57be769f63c60d4d /main/lzo/asm/i386/00README.TXT
parentb14d9bdfa98b85b9f836d73fbcfc65582a92184a (diff)
Add OpenVPN3 to build, change build system to cmake
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-
-Directory overview:
-===================
-
-As writing portable assembler sources supporting different operating
-systems, compilers and assemblers has proven to be extremely painful,
-the assembler sources have been converted into a more portable 'db'
-format. Use these whenever possible.
-
- src_gas sources converted for portable gcc/gas syntax
- src_masm sources converted for portable masm/tasm/wasm syntax
- src_nasm sources converted for portable nasm syntax
-
- src assembler sources (you need the OpenSource nasm assembler)
-
- obj pre-assembled object files
-
-Also look 'src_XXX/all/asm_all.asm' which contains all assembler
-functions conveniently arranged into a single file.
-
-
-Notes:
-======
-
-- The assembler sources are designed for a flat 32-bit memory model
- running in protected mode - they should work with all i386
- 32-bit compilers around.
-
-- All functions expect a 'cdecl' (C stack based) calling convention.
- The function return value will be placed into 'eax'.
- All other registers are preserved.
-
-- Prototypes for the assembler functions can be found in <lzo/lzo_asm.h>.
-
-- For reasons of speed all fast assembler decompressors (having '_fast'
- in their name) can access (write to) up to 3 bytes past the end of
- the decompressed (output) block. Data past the end of the compressed
- (input) block is never accessed (read from).
- [ technical note: because data is transferred in 32-bit units ]
-
-- Finally you should test if the assembler versions are actually faster
- than the C version on your machine - some compilers can do a very good
- optimization job, and they also can optimize the code for a specific
- processor type.
-