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1368 lines
42 KiB
1368 lines
42 KiB
/* |
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* inffast.S is a hand tuned assembler version of: |
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* |
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* inffast.c -- fast decoding |
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* Copyright (C) 1995-2003 Mark Adler |
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* For conditions of distribution and use, see copyright notice in zlib.h |
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* |
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* Copyright (C) 2003 Chris Anderson <christop@charm.net> |
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* Please use the copyright conditions above. |
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* |
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* This version (Jan-23-2003) of inflate_fast was coded and tested under |
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* GNU/Linux on a pentium 3, using the gcc-3.2 compiler distribution. On that |
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* machine, I found that gzip style archives decompressed about 20% faster than |
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* the gcc-3.2 -O3 -fomit-frame-pointer compiled version. Your results will |
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* depend on how large of a buffer is used for z_stream.next_in & next_out |
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* (8K-32K worked best for my 256K cpu cache) and how much overhead there is in |
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* stream processing I/O and crc32/addler32. In my case, this routine used |
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* 70% of the cpu time and crc32 used 20%. |
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* |
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* I am confident that this version will work in the general case, but I have |
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* not tested a wide variety of datasets or a wide variety of platforms. |
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* |
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* Jan-24-2003 -- Added -DUSE_MMX define for slightly faster inflating. |
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* It should be a runtime flag instead of compile time flag... |
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* |
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* Jan-26-2003 -- Added runtime check for MMX support with cpuid instruction. |
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* With -DUSE_MMX, only MMX code is compiled. With -DNO_MMX, only non-MMX code |
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* is compiled. Without either option, runtime detection is enabled. Runtime |
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* detection should work on all modern cpus and the recomended algorithm (flip |
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* ID bit on eflags and then use the cpuid instruction) is used in many |
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* multimedia applications. Tested under win2k with gcc-2.95 and gas-2.12 |
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* distributed with cygwin3. Compiling with gcc-2.95 -c inffast.S -o |
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* inffast.obj generates a COFF object which can then be linked with MSVC++ |
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* compiled code. Tested under FreeBSD 4.7 with gcc-2.95. |
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* |
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* Jan-28-2003 -- Tested Athlon XP... MMX mode is slower than no MMX (and |
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* slower than compiler generated code). Adjusted cpuid check to use the MMX |
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* code only for Pentiums < P4 until I have more data on the P4. Speed |
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* improvment is only about 15% on the Athlon when compared with code generated |
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* with MSVC++. Not sure yet, but I think the P4 will also be slower using the |
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* MMX mode because many of it's x86 ALU instructions execute in .5 cycles and |
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* have less latency than MMX ops. Added code to buffer the last 11 bytes of |
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* the input stream since the MMX code grabs bits in chunks of 32, which |
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* differs from the inffast.c algorithm. I don't think there would have been |
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* read overruns where a page boundary was crossed (a segfault), but there |
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* could have been overruns when next_in ends on unaligned memory (unintialized |
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* memory read). |
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* |
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* Mar-13-2003 -- P4 MMX is slightly slower than P4 NO_MMX. I created a C |
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* version of the non-MMX code so that it doesn't depend on zstrm and zstate |
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* structure offsets which are hard coded in this file. This was last tested |
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* with zlib-1.2.0 which is currently in beta testing, newer versions of this |
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* and inffas86.c can be found at http://www.eetbeetee.com/zlib/ and |
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* http://www.charm.net/~christop/zlib/ |
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*/ |
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/* |
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* if you have underscore linking problems (_inflate_fast undefined), try |
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* using -DGAS_COFF |
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*/ |
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#if ! defined( GAS_COFF ) && ! defined( GAS_ELF ) |
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|
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#if defined( WIN32 ) || defined( __CYGWIN__ ) |
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#define GAS_COFF /* windows object format */ |
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#else |
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#define GAS_ELF |
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#endif |
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#endif /* ! GAS_COFF && ! GAS_ELF */ |
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#if defined( GAS_COFF ) |
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/* coff externals have underscores */ |
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#define inflate_fast _inflate_fast |
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#define inflate_fast_use_mmx _inflate_fast_use_mmx |
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#endif /* GAS_COFF */ |
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.file "inffast.S" |
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.globl inflate_fast |
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.text |
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.align 4,0 |
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.L_invalid_literal_length_code_msg: |
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.string "invalid literal/length code" |
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|
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.align 4,0 |
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.L_invalid_distance_code_msg: |
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.string "invalid distance code" |
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.align 4,0 |
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.L_invalid_distance_too_far_msg: |
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.string "invalid distance too far back" |
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#if ! defined( NO_MMX ) |
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.align 4,0 |
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.L_mask: /* mask[N] = ( 1 << N ) - 1 */ |
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.long 0 |
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.long 1 |
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.long 3 |
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.long 7 |
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.long 15 |
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.long 31 |
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.long 63 |
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.long 127 |
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.long 255 |
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.long 511 |
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.long 1023 |
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.long 2047 |
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.long 4095 |
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.long 8191 |
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.long 16383 |
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.long 32767 |
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.long 65535 |
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.long 131071 |
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.long 262143 |
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.long 524287 |
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.long 1048575 |
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.long 2097151 |
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.long 4194303 |
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.long 8388607 |
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.long 16777215 |
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.long 33554431 |
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.long 67108863 |
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.long 134217727 |
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.long 268435455 |
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.long 536870911 |
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.long 1073741823 |
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.long 2147483647 |
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.long 4294967295 |
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#endif /* NO_MMX */ |
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.text |
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/* |
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* struct z_stream offsets, in zlib.h |
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*/ |
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#define next_in_strm 0 /* strm->next_in */ |
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#define avail_in_strm 4 /* strm->avail_in */ |
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#define next_out_strm 12 /* strm->next_out */ |
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#define avail_out_strm 16 /* strm->avail_out */ |
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#define msg_strm 24 /* strm->msg */ |
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#define state_strm 28 /* strm->state */ |
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|
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/* |
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* struct inflate_state offsets, in inflate.h |
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*/ |
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#define mode_state 0 /* state->mode */ |
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#define wsize_state 32 /* state->wsize */ |
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#define write_state 40 /* state->write */ |
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#define window_state 44 /* state->window */ |
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#define hold_state 48 /* state->hold */ |
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#define bits_state 52 /* state->bits */ |
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#define lencode_state 68 /* state->lencode */ |
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#define distcode_state 72 /* state->distcode */ |
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#define lenbits_state 76 /* state->lenbits */ |
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#define distbits_state 80 /* state->distbits */ |
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|
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/* |
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* inflate_fast's activation record |
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*/ |
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#define local_var_size 64 /* how much local space for vars */ |
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#define strm_sp 88 /* first arg: z_stream * (local_var_size + 24) */ |
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#define start_sp 92 /* second arg: unsigned int (local_var_size + 28) */ |
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/* |
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* offsets for local vars on stack |
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*/ |
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#define out 60 /* unsigned char* */ |
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#define window 56 /* unsigned char* */ |
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#define wsize 52 /* unsigned int */ |
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#define write 48 /* unsigned int */ |
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#define in 44 /* unsigned char* */ |
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#define beg 40 /* unsigned char* */ |
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#define buf 28 /* char[ 12 ] */ |
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#define len 24 /* unsigned int */ |
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#define last 20 /* unsigned char* */ |
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#define end 16 /* unsigned char* */ |
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#define dcode 12 /* code* */ |
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#define lcode 8 /* code* */ |
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#define dmask 4 /* unsigned int */ |
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#define lmask 0 /* unsigned int */ |
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|
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/* |
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* typedef enum inflate_mode consts, in inflate.h |
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*/ |
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#define INFLATE_MODE_TYPE 11 /* state->mode flags enum-ed in inflate.h */ |
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#define INFLATE_MODE_BAD 26 |
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#if ! defined( USE_MMX ) && ! defined( NO_MMX ) |
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#define RUN_TIME_MMX |
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#define CHECK_MMX 1 |
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#define DO_USE_MMX 2 |
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#define DONT_USE_MMX 3 |
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.globl inflate_fast_use_mmx |
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.data |
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.align 4,0 |
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inflate_fast_use_mmx: /* integer flag for run time control 1=check,2=mmx,3=no */ |
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.long CHECK_MMX |
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#if defined( GAS_ELF ) |
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/* elf info */ |
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.type inflate_fast_use_mmx,@object |
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.size inflate_fast_use_mmx,4 |
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#endif |
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#endif /* RUN_TIME_MMX */ |
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#if defined( GAS_COFF ) |
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/* coff info: scl 2 = extern, type 32 = function */ |
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.def inflate_fast; .scl 2; .type 32; .endef |
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#endif |
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.text |
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.align 32,0x90 |
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inflate_fast: |
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pushl %edi |
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pushl %esi |
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pushl %ebp |
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pushl %ebx |
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pushf /* save eflags (strm_sp, state_sp assumes this is 32 bits) */ |
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subl $local_var_size, %esp |
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cld |
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#define strm_r %esi |
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#define state_r %edi |
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|
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movl strm_sp(%esp), strm_r |
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movl state_strm(strm_r), state_r |
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|
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/* in = strm->next_in; |
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* out = strm->next_out; |
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* last = in + strm->avail_in - 11; |
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* beg = out - (start - strm->avail_out); |
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* end = out + (strm->avail_out - 257); |
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*/ |
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movl avail_in_strm(strm_r), %edx |
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movl next_in_strm(strm_r), %eax |
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addl %eax, %edx /* avail_in += next_in */ |
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subl $11, %edx /* avail_in -= 11 */ |
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|
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movl %eax, in(%esp) |
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movl %edx, last(%esp) |
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|
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movl start_sp(%esp), %ebp |
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movl avail_out_strm(strm_r), %ecx |
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movl next_out_strm(strm_r), %ebx |
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|
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subl %ecx, %ebp /* start -= avail_out */ |
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negl %ebp /* start = -start */ |
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addl %ebx, %ebp /* start += next_out */ |
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|
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subl $257, %ecx /* avail_out -= 257 */ |
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addl %ebx, %ecx /* avail_out += out */ |
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|
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movl %ebx, out(%esp) |
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movl %ebp, beg(%esp) |
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movl %ecx, end(%esp) |
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|
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/* wsize = state->wsize; |
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* write = state->write; |
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* window = state->window; |
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* hold = state->hold; |
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* bits = state->bits; |
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* lcode = state->lencode; |
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* dcode = state->distcode; |
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* lmask = ( 1 << state->lenbits ) - 1; |
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* dmask = ( 1 << state->distbits ) - 1; |
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*/ |
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movl lencode_state(state_r), %eax |
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movl distcode_state(state_r), %ecx |
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movl %eax, lcode(%esp) |
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movl %ecx, dcode(%esp) |
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movl $1, %eax |
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movl lenbits_state(state_r), %ecx |
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shll %cl, %eax |
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decl %eax |
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movl %eax, lmask(%esp) |
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movl $1, %eax |
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movl distbits_state(state_r), %ecx |
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shll %cl, %eax |
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decl %eax |
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movl %eax, dmask(%esp) |
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movl wsize_state(state_r), %eax |
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movl write_state(state_r), %ecx |
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movl window_state(state_r), %edx |
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movl %eax, wsize(%esp) |
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movl %ecx, write(%esp) |
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movl %edx, window(%esp) |
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movl hold_state(state_r), %ebp |
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movl bits_state(state_r), %ebx |
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#undef strm_r |
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#undef state_r |
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#define in_r %esi |
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#define from_r %esi |
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#define out_r %edi |
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movl in(%esp), in_r |
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movl last(%esp), %ecx |
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cmpl in_r, %ecx |
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ja .L_align_long /* if in < last */ |
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addl $11, %ecx /* ecx = &in[ avail_in ] */ |
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subl in_r, %ecx /* ecx = avail_in */ |
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movl $12, %eax |
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subl %ecx, %eax /* eax = 12 - avail_in */ |
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leal buf(%esp), %edi |
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rep movsb /* memcpy( buf, in, avail_in ) */ |
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movl %eax, %ecx |
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xorl %eax, %eax |
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rep stosb /* memset( &buf[ avail_in ], 0, 12 - avail_in ) */ |
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leal buf(%esp), in_r /* in = buf */ |
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movl in_r, last(%esp) /* last = in, do just one iteration */ |
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jmp .L_is_aligned |
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/* align in_r on long boundary */ |
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.L_align_long: |
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testl $3, in_r |
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jz .L_is_aligned |
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xorl %eax, %eax |
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movb (in_r), %al |
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incl in_r |
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movl %ebx, %ecx |
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addl $8, %ebx |
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shll %cl, %eax |
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orl %eax, %ebp |
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jmp .L_align_long |
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.L_is_aligned: |
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movl out(%esp), out_r |
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#if defined( NO_MMX ) |
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jmp .L_do_loop |
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#endif |
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|
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#if defined( USE_MMX ) |
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jmp .L_init_mmx |
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#endif |
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|
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/*** Runtime MMX check ***/ |
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#if defined( RUN_TIME_MMX ) |
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.L_check_mmx: |
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cmpl $DO_USE_MMX, inflate_fast_use_mmx |
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je .L_init_mmx |
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ja .L_do_loop /* > 2 */ |
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|
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pushl %eax |
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pushl %ebx |
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pushl %ecx |
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pushl %edx |
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pushf |
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movl (%esp), %eax /* copy eflags to eax */ |
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xorl $0x200000, (%esp) /* try toggling ID bit of eflags (bit 21) |
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* to see if cpu supports cpuid... |
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* ID bit method not supported by NexGen but |
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* bios may load a cpuid instruction and |
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* cpuid may be disabled on Cyrix 5-6x86 */ |
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popf |
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pushf |
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popl %edx /* copy new eflags to edx */ |
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xorl %eax, %edx /* test if ID bit is flipped */ |
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jz .L_dont_use_mmx /* not flipped if zero */ |
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xorl %eax, %eax |
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cpuid |
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cmpl $0x756e6547, %ebx /* check for GenuineIntel in ebx,ecx,edx */ |
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jne .L_dont_use_mmx |
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cmpl $0x6c65746e, %ecx |
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jne .L_dont_use_mmx |
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cmpl $0x49656e69, %edx |
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jne .L_dont_use_mmx |
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movl $1, %eax |
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cpuid /* get cpu features */ |
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shrl $8, %eax |
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andl $15, %eax |
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cmpl $6, %eax /* check for Pentium family, is 0xf for P4 */ |
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jne .L_dont_use_mmx |
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testl $0x800000, %edx /* test if MMX feature is set (bit 23) */ |
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jnz .L_use_mmx |
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jmp .L_dont_use_mmx |
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.L_use_mmx: |
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movl $DO_USE_MMX, inflate_fast_use_mmx |
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jmp .L_check_mmx_pop |
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.L_dont_use_mmx: |
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movl $DONT_USE_MMX, inflate_fast_use_mmx |
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.L_check_mmx_pop: |
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popl %edx |
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popl %ecx |
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popl %ebx |
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popl %eax |
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jmp .L_check_mmx |
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#endif |
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|
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/*** Non-MMX code ***/ |
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|
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#if defined ( NO_MMX ) || defined( RUN_TIME_MMX ) |
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#define hold_r %ebp |
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#define bits_r %bl |
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#define bitslong_r %ebx |
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|
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.align 32,0x90 |
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.L_while_test: |
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/* while (in < last && out < end) |
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*/ |
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cmpl out_r, end(%esp) |
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jbe .L_break_loop /* if (out >= end) */ |
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|
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cmpl in_r, last(%esp) |
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jbe .L_break_loop |
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|
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.L_do_loop: |
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/* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out |
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* |
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* do { |
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* if (bits < 15) { |
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* hold |= *((unsigned short *)in)++ << bits; |
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* bits += 16 |
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* } |
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* this = lcode[hold & lmask] |
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*/ |
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cmpb $15, bits_r |
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ja .L_get_length_code /* if (15 < bits) */ |
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|
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xorl %eax, %eax |
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lodsw /* al = *(ushort *)in++ */ |
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movb bits_r, %cl /* cl = bits, needs it for shifting */ |
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addb $16, bits_r /* bits += 16 */ |
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shll %cl, %eax |
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orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */ |
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|
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.L_get_length_code: |
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movl lmask(%esp), %edx /* edx = lmask */ |
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movl lcode(%esp), %ecx /* ecx = lcode */ |
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andl hold_r, %edx /* edx &= hold */ |
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movl (%ecx,%edx,4), %eax /* eax = lcode[hold & lmask] */ |
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|
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.L_dolen: |
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/* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out |
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* |
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* dolen: |
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* bits -= this.bits; |
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* hold >>= this.bits |
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*/ |
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movb %ah, %cl /* cl = this.bits */ |
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subb %ah, bits_r /* bits -= this.bits */ |
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shrl %cl, hold_r /* hold >>= this.bits */ |
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|
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/* check if op is a literal |
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* if (op == 0) { |
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* PUP(out) = this.val; |
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* } |
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*/ |
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testb %al, %al |
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jnz .L_test_for_length_base /* if (op != 0) 45.7% */ |
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|
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shrl $16, %eax /* output this.val char */ |
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stosb |
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jmp .L_while_test |
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|
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.L_test_for_length_base: |
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/* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = len |
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* |
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* else if (op & 16) { |
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* len = this.val |
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* op &= 15 |
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* if (op) { |
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* if (op > bits) { |
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* hold |= *((unsigned short *)in)++ << bits; |
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* bits += 16 |
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* } |
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* len += hold & mask[op]; |
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* bits -= op; |
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* hold >>= op; |
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* } |
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*/ |
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#define len_r %edx |
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movl %eax, len_r /* len = this */ |
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shrl $16, len_r /* len = this.val */ |
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movb %al, %cl |
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|
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testb $16, %al |
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jz .L_test_for_second_level_length /* if ((op & 16) == 0) 8% */ |
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andb $15, %cl /* op &= 15 */ |
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jz .L_save_len /* if (!op) */ |
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cmpb %cl, bits_r |
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jae .L_add_bits_to_len /* if (op <= bits) */ |
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|
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movb %cl, %ch /* stash op in ch, freeing cl */ |
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xorl %eax, %eax |
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lodsw /* al = *(ushort *)in++ */ |
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movb bits_r, %cl /* cl = bits, needs it for shifting */ |
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addb $16, bits_r /* bits += 16 */ |
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shll %cl, %eax |
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orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */ |
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movb %ch, %cl /* move op back to ecx */ |
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|
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.L_add_bits_to_len: |
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movl $1, %eax |
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shll %cl, %eax |
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decl %eax |
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subb %cl, bits_r |
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andl hold_r, %eax /* eax &= hold */ |
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shrl %cl, hold_r |
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addl %eax, len_r /* len += hold & mask[op] */ |
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|
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.L_save_len: |
|
movl len_r, len(%esp) /* save len */ |
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#undef len_r |
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|
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.L_decode_distance: |
|
/* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = dist |
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* |
|
* if (bits < 15) { |
|
* hold |= *((unsigned short *)in)++ << bits; |
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* bits += 16 |
|
* } |
|
* this = dcode[hold & dmask]; |
|
* dodist: |
|
* bits -= this.bits; |
|
* hold >>= this.bits; |
|
* op = this.op; |
|
*/ |
|
|
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cmpb $15, bits_r |
|
ja .L_get_distance_code /* if (15 < bits) */ |
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|
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xorl %eax, %eax |
|
lodsw /* al = *(ushort *)in++ */ |
|
movb bits_r, %cl /* cl = bits, needs it for shifting */ |
|
addb $16, bits_r /* bits += 16 */ |
|
shll %cl, %eax |
|
orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */ |
|
|
|
.L_get_distance_code: |
|
movl dmask(%esp), %edx /* edx = dmask */ |
|
movl dcode(%esp), %ecx /* ecx = dcode */ |
|
andl hold_r, %edx /* edx &= hold */ |
|
movl (%ecx,%edx,4), %eax /* eax = dcode[hold & dmask] */ |
|
|
|
#define dist_r %edx |
|
.L_dodist: |
|
movl %eax, dist_r /* dist = this */ |
|
shrl $16, dist_r /* dist = this.val */ |
|
movb %ah, %cl |
|
subb %ah, bits_r /* bits -= this.bits */ |
|
shrl %cl, hold_r /* hold >>= this.bits */ |
|
|
|
/* if (op & 16) { |
|
* dist = this.val |
|
* op &= 15 |
|
* if (op > bits) { |
|
* hold |= *((unsigned short *)in)++ << bits; |
|
* bits += 16 |
|
* } |
|
* dist += hold & mask[op]; |
|
* bits -= op; |
|
* hold >>= op; |
|
*/ |
|
movb %al, %cl /* cl = this.op */ |
|
|
|
testb $16, %al /* if ((op & 16) == 0) */ |
|
jz .L_test_for_second_level_dist |
|
andb $15, %cl /* op &= 15 */ |
|
jz .L_check_dist_one |
|
cmpb %cl, bits_r |
|
jae .L_add_bits_to_dist /* if (op <= bits) 97.6% */ |
|
|
|
movb %cl, %ch /* stash op in ch, freeing cl */ |
|
xorl %eax, %eax |
|
lodsw /* al = *(ushort *)in++ */ |
|
movb bits_r, %cl /* cl = bits, needs it for shifting */ |
|
addb $16, bits_r /* bits += 16 */ |
|
shll %cl, %eax |
|
orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */ |
|
movb %ch, %cl /* move op back to ecx */ |
|
|
|
.L_add_bits_to_dist: |
|
movl $1, %eax |
|
shll %cl, %eax |
|
decl %eax /* (1 << op) - 1 */ |
|
subb %cl, bits_r |
|
andl hold_r, %eax /* eax &= hold */ |
|
shrl %cl, hold_r |
|
addl %eax, dist_r /* dist += hold & ((1 << op) - 1) */ |
|
jmp .L_check_window |
|
|
|
.L_check_window: |
|
/* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist |
|
* %ecx = nbytes |
|
* |
|
* nbytes = out - beg; |
|
* if (dist <= nbytes) { |
|
* from = out - dist; |
|
* do { |
|
* PUP(out) = PUP(from); |
|
* } while (--len > 0) { |
|
* } |
|
*/ |
|
|
|
movl in_r, in(%esp) /* save in so from can use it's reg */ |
|
movl out_r, %eax |
|
subl beg(%esp), %eax /* nbytes = out - beg */ |
|
|
|
cmpl dist_r, %eax |
|
jb .L_clip_window /* if (dist > nbytes) 4.2% */ |
|
|
|
movl len(%esp), %ecx |
|
movl out_r, from_r |
|
subl dist_r, from_r /* from = out - dist */ |
|
|
|
subl $3, %ecx |
|
movb (from_r), %al |
|
movb %al, (out_r) |
|
movb 1(from_r), %al |
|
movb 2(from_r), %dl |
|
addl $3, from_r |
|
movb %al, 1(out_r) |
|
movb %dl, 2(out_r) |
|
addl $3, out_r |
|
rep movsb |
|
|
|
movl in(%esp), in_r /* move in back to %esi, toss from */ |
|
jmp .L_while_test |
|
|
|
.align 16,0x90 |
|
.L_check_dist_one: |
|
cmpl $1, dist_r |
|
jne .L_check_window |
|
cmpl out_r, beg(%esp) |
|
je .L_check_window |
|
|
|
decl out_r |
|
movl len(%esp), %ecx |
|
movb (out_r), %al |
|
subl $3, %ecx |
|
|
|
movb %al, 1(out_r) |
|
movb %al, 2(out_r) |
|
movb %al, 3(out_r) |
|
addl $4, out_r |
|
rep stosb |
|
|
|
jmp .L_while_test |
|
|
|
.align 16,0x90 |
|
.L_test_for_second_level_length: |
|
/* else if ((op & 64) == 0) { |
|
* this = lcode[this.val + (hold & mask[op])]; |
|
* } |
|
*/ |
|
testb $64, %al |
|
jnz .L_test_for_end_of_block /* if ((op & 64) != 0) */ |
|
|
|
movl $1, %eax |
|
shll %cl, %eax |
|
decl %eax |
|
andl hold_r, %eax /* eax &= hold */ |
|
addl %edx, %eax /* eax += this.val */ |
|
movl lcode(%esp), %edx /* edx = lcode */ |
|
movl (%edx,%eax,4), %eax /* eax = lcode[val + (hold&mask[op])] */ |
|
jmp .L_dolen |
|
|
|
.align 16,0x90 |
|
.L_test_for_second_level_dist: |
|
/* else if ((op & 64) == 0) { |
|
* this = dcode[this.val + (hold & mask[op])]; |
|
* } |
|
*/ |
|
testb $64, %al |
|
jnz .L_invalid_distance_code /* if ((op & 64) != 0) */ |
|
|
|
movl $1, %eax |
|
shll %cl, %eax |
|
decl %eax |
|
andl hold_r, %eax /* eax &= hold */ |
|
addl %edx, %eax /* eax += this.val */ |
|
movl dcode(%esp), %edx /* edx = dcode */ |
|
movl (%edx,%eax,4), %eax /* eax = dcode[val + (hold&mask[op])] */ |
|
jmp .L_dodist |
|
|
|
.align 16,0x90 |
|
.L_clip_window: |
|
/* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist |
|
* %ecx = nbytes |
|
* |
|
* else { |
|
* if (dist > wsize) { |
|
* invalid distance |
|
* } |
|
* from = window; |
|
* nbytes = dist - nbytes; |
|
* if (write == 0) { |
|
* from += wsize - nbytes; |
|
*/ |
|
#define nbytes_r %ecx |
|
movl %eax, nbytes_r |
|
movl wsize(%esp), %eax /* prepare for dist compare */ |
|
negl nbytes_r /* nbytes = -nbytes */ |
|
movl window(%esp), from_r /* from = window */ |
|
|
|
cmpl dist_r, %eax |
|
jb .L_invalid_distance_too_far /* if (dist > wsize) */ |
|
|
|
addl dist_r, nbytes_r /* nbytes = dist - nbytes */ |
|
cmpl $0, write(%esp) |
|
jne .L_wrap_around_window /* if (write != 0) */ |
|
|
|
subl nbytes_r, %eax |
|
addl %eax, from_r /* from += wsize - nbytes */ |
|
|
|
/* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist |
|
* %ecx = nbytes, %eax = len |
|
* |
|
* if (nbytes < len) { |
|
* len -= nbytes; |
|
* do { |
|
* PUP(out) = PUP(from); |
|
* } while (--nbytes); |
|
* from = out - dist; |
|
* } |
|
* } |
|
*/ |
|
#define len_r %eax |
|
movl len(%esp), len_r |
|
cmpl nbytes_r, len_r |
|
jbe .L_do_copy1 /* if (nbytes >= len) */ |
|
|
|
subl nbytes_r, len_r /* len -= nbytes */ |
|
rep movsb |
|
movl out_r, from_r |
|
subl dist_r, from_r /* from = out - dist */ |
|
jmp .L_do_copy1 |
|
|
|
cmpl nbytes_r, len_r |
|
jbe .L_do_copy1 /* if (nbytes >= len) */ |
|
|
|
subl nbytes_r, len_r /* len -= nbytes */ |
|
rep movsb |
|
movl out_r, from_r |
|
subl dist_r, from_r /* from = out - dist */ |
|
jmp .L_do_copy1 |
|
|
|
.L_wrap_around_window: |
|
/* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist |
|
* %ecx = nbytes, %eax = write, %eax = len |
|
* |
|
* else if (write < nbytes) { |
|
* from += wsize + write - nbytes; |
|
* nbytes -= write; |
|
* if (nbytes < len) { |
|
* len -= nbytes; |
|
* do { |
|
* PUP(out) = PUP(from); |
|
* } while (--nbytes); |
|
* from = window; |
|
* nbytes = write; |
|
* if (nbytes < len) { |
|
* len -= nbytes; |
|
* do { |
|
* PUP(out) = PUP(from); |
|
* } while(--nbytes); |
|
* from = out - dist; |
|
* } |
|
* } |
|
* } |
|
*/ |
|
#define write_r %eax |
|
movl write(%esp), write_r |
|
cmpl write_r, nbytes_r |
|
jbe .L_contiguous_in_window /* if (write >= nbytes) */ |
|
|
|
addl wsize(%esp), from_r |
|
addl write_r, from_r |
|
subl nbytes_r, from_r /* from += wsize + write - nbytes */ |
|
subl write_r, nbytes_r /* nbytes -= write */ |
|
#undef write_r |
|
|
|
movl len(%esp), len_r |
|
cmpl nbytes_r, len_r |
|
jbe .L_do_copy1 /* if (nbytes >= len) */ |
|
|
|
subl nbytes_r, len_r /* len -= nbytes */ |
|
rep movsb |
|
movl window(%esp), from_r /* from = window */ |
|
movl write(%esp), nbytes_r /* nbytes = write */ |
|
cmpl nbytes_r, len_r |
|
jbe .L_do_copy1 /* if (nbytes >= len) */ |
|
|
|
subl nbytes_r, len_r /* len -= nbytes */ |
|
rep movsb |
|
movl out_r, from_r |
|
subl dist_r, from_r /* from = out - dist */ |
|
jmp .L_do_copy1 |
|
|
|
.L_contiguous_in_window: |
|
/* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist |
|
* %ecx = nbytes, %eax = write, %eax = len |
|
* |
|
* else { |
|
* from += write - nbytes; |
|
* if (nbytes < len) { |
|
* len -= nbytes; |
|
* do { |
|
* PUP(out) = PUP(from); |
|
* } while (--nbytes); |
|
* from = out - dist; |
|
* } |
|
* } |
|
*/ |
|
#define write_r %eax |
|
addl write_r, from_r |
|
subl nbytes_r, from_r /* from += write - nbytes */ |
|
#undef write_r |
|
|
|
movl len(%esp), len_r |
|
cmpl nbytes_r, len_r |
|
jbe .L_do_copy1 /* if (nbytes >= len) */ |
|
|
|
subl nbytes_r, len_r /* len -= nbytes */ |
|
rep movsb |
|
movl out_r, from_r |
|
subl dist_r, from_r /* from = out - dist */ |
|
|
|
.L_do_copy1: |
|
/* regs: %esi = from, %esi = in, %ebp = hold, %bl = bits, %edi = out |
|
* %eax = len |
|
* |
|
* while (len > 0) { |
|
* PUP(out) = PUP(from); |
|
* len--; |
|
* } |
|
* } |
|
* } while (in < last && out < end); |
|
*/ |
|
#undef nbytes_r |
|
#define in_r %esi |
|
movl len_r, %ecx |
|
rep movsb |
|
|
|
movl in(%esp), in_r /* move in back to %esi, toss from */ |
|
jmp .L_while_test |
|
|
|
#undef len_r |
|
#undef dist_r |
|
|
|
#endif /* NO_MMX || RUN_TIME_MMX */ |
|
|
|
|
|
/*** MMX code ***/ |
|
|
|
#if defined( USE_MMX ) || defined( RUN_TIME_MMX ) |
|
|
|
.align 32,0x90 |
|
.L_init_mmx: |
|
emms |
|
|
|
#undef bits_r |
|
#undef bitslong_r |
|
#define bitslong_r %ebp |
|
#define hold_mm %mm0 |
|
movd %ebp, hold_mm |
|
movl %ebx, bitslong_r |
|
|
|
#define used_mm %mm1 |
|
#define dmask2_mm %mm2 |
|
#define lmask2_mm %mm3 |
|
#define lmask_mm %mm4 |
|
#define dmask_mm %mm5 |
|
#define tmp_mm %mm6 |
|
|
|
movd lmask(%esp), lmask_mm |
|
movq lmask_mm, lmask2_mm |
|
movd dmask(%esp), dmask_mm |
|
movq dmask_mm, dmask2_mm |
|
pxor used_mm, used_mm |
|
movl lcode(%esp), %ebx /* ebx = lcode */ |
|
jmp .L_do_loop_mmx |
|
|
|
.align 32,0x90 |
|
.L_while_test_mmx: |
|
/* while (in < last && out < end) |
|
*/ |
|
cmpl out_r, end(%esp) |
|
jbe .L_break_loop /* if (out >= end) */ |
|
|
|
cmpl in_r, last(%esp) |
|
jbe .L_break_loop |
|
|
|
.L_do_loop_mmx: |
|
psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ |
|
|
|
cmpl $32, bitslong_r |
|
ja .L_get_length_code_mmx /* if (32 < bits) */ |
|
|
|
movd bitslong_r, tmp_mm |
|
movd (in_r), %mm7 |
|
addl $4, in_r |
|
psllq tmp_mm, %mm7 |
|
addl $32, bitslong_r |
|
por %mm7, hold_mm /* hold_mm |= *((uint *)in)++ << bits */ |
|
|
|
.L_get_length_code_mmx: |
|
pand hold_mm, lmask_mm |
|
movd lmask_mm, %eax |
|
movq lmask2_mm, lmask_mm |
|
movl (%ebx,%eax,4), %eax /* eax = lcode[hold & lmask] */ |
|
|
|
.L_dolen_mmx: |
|
movzbl %ah, %ecx /* ecx = this.bits */ |
|
movd %ecx, used_mm |
|
subl %ecx, bitslong_r /* bits -= this.bits */ |
|
|
|
testb %al, %al |
|
jnz .L_test_for_length_base_mmx /* if (op != 0) 45.7% */ |
|
|
|
shrl $16, %eax /* output this.val char */ |
|
stosb |
|
jmp .L_while_test_mmx |
|
|
|
.L_test_for_length_base_mmx: |
|
#define len_r %edx |
|
movl %eax, len_r /* len = this */ |
|
shrl $16, len_r /* len = this.val */ |
|
|
|
testb $16, %al |
|
jz .L_test_for_second_level_length_mmx /* if ((op & 16) == 0) 8% */ |
|
andl $15, %eax /* op &= 15 */ |
|
jz .L_decode_distance_mmx /* if (!op) */ |
|
|
|
psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ |
|
movd %eax, used_mm |
|
movd hold_mm, %ecx |
|
subl %eax, bitslong_r |
|
andl .L_mask(,%eax,4), %ecx |
|
addl %ecx, len_r /* len += hold & mask[op] */ |
|
|
|
.L_decode_distance_mmx: |
|
psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ |
|
|
|
cmpl $32, bitslong_r |
|
ja .L_get_dist_code_mmx /* if (32 < bits) */ |
|
|
|
movd bitslong_r, tmp_mm |
|
movd (in_r), %mm7 |
|
addl $4, in_r |
|
psllq tmp_mm, %mm7 |
|
addl $32, bitslong_r |
|
por %mm7, hold_mm /* hold_mm |= *((uint *)in)++ << bits */ |
|
|
|
.L_get_dist_code_mmx: |
|
movl dcode(%esp), %ebx /* ebx = dcode */ |
|
pand hold_mm, dmask_mm |
|
movd dmask_mm, %eax |
|
movq dmask2_mm, dmask_mm |
|
movl (%ebx,%eax,4), %eax /* eax = dcode[hold & lmask] */ |
|
|
|
.L_dodist_mmx: |
|
#define dist_r %ebx |
|
movzbl %ah, %ecx /* ecx = this.bits */ |
|
movl %eax, dist_r |
|
shrl $16, dist_r /* dist = this.val */ |
|
subl %ecx, bitslong_r /* bits -= this.bits */ |
|
movd %ecx, used_mm |
|
|
|
testb $16, %al /* if ((op & 16) == 0) */ |
|
jz .L_test_for_second_level_dist_mmx |
|
andl $15, %eax /* op &= 15 */ |
|
jz .L_check_dist_one_mmx |
|
|
|
.L_add_bits_to_dist_mmx: |
|
psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ |
|
movd %eax, used_mm /* save bit length of current op */ |
|
movd hold_mm, %ecx /* get the next bits on input stream */ |
|
subl %eax, bitslong_r /* bits -= op bits */ |
|
andl .L_mask(,%eax,4), %ecx /* ecx = hold & mask[op] */ |
|
addl %ecx, dist_r /* dist += hold & mask[op] */ |
|
|
|
.L_check_window_mmx: |
|
movl in_r, in(%esp) /* save in so from can use it's reg */ |
|
movl out_r, %eax |
|
subl beg(%esp), %eax /* nbytes = out - beg */ |
|
|
|
cmpl dist_r, %eax |
|
jb .L_clip_window_mmx /* if (dist > nbytes) 4.2% */ |
|
|
|
movl len_r, %ecx |
|
movl out_r, from_r |
|
subl dist_r, from_r /* from = out - dist */ |
|
|
|
subl $3, %ecx |
|
movb (from_r), %al |
|
movb %al, (out_r) |
|
movb 1(from_r), %al |
|
movb 2(from_r), %dl |
|
addl $3, from_r |
|
movb %al, 1(out_r) |
|
movb %dl, 2(out_r) |
|
addl $3, out_r |
|
rep movsb |
|
|
|
movl in(%esp), in_r /* move in back to %esi, toss from */ |
|
movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */ |
|
jmp .L_while_test_mmx |
|
|
|
.align 16,0x90 |
|
.L_check_dist_one_mmx: |
|
cmpl $1, dist_r |
|
jne .L_check_window_mmx |
|
cmpl out_r, beg(%esp) |
|
je .L_check_window_mmx |
|
|
|
decl out_r |
|
movl len_r, %ecx |
|
movb (out_r), %al |
|
subl $3, %ecx |
|
|
|
movb %al, 1(out_r) |
|
movb %al, 2(out_r) |
|
movb %al, 3(out_r) |
|
addl $4, out_r |
|
rep stosb |
|
|
|
movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */ |
|
jmp .L_while_test_mmx |
|
|
|
.align 16,0x90 |
|
.L_test_for_second_level_length_mmx: |
|
testb $64, %al |
|
jnz .L_test_for_end_of_block /* if ((op & 64) != 0) */ |
|
|
|
andl $15, %eax |
|
psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ |
|
movd hold_mm, %ecx |
|
andl .L_mask(,%eax,4), %ecx |
|
addl len_r, %ecx |
|
movl (%ebx,%ecx,4), %eax /* eax = lcode[hold & lmask] */ |
|
jmp .L_dolen_mmx |
|
|
|
.align 16,0x90 |
|
.L_test_for_second_level_dist_mmx: |
|
testb $64, %al |
|
jnz .L_invalid_distance_code /* if ((op & 64) != 0) */ |
|
|
|
andl $15, %eax |
|
psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ |
|
movd hold_mm, %ecx |
|
andl .L_mask(,%eax,4), %ecx |
|
movl dcode(%esp), %eax /* ecx = dcode */ |
|
addl dist_r, %ecx |
|
movl (%eax,%ecx,4), %eax /* eax = lcode[hold & lmask] */ |
|
jmp .L_dodist_mmx |
|
|
|
.align 16,0x90 |
|
.L_clip_window_mmx: |
|
#define nbytes_r %ecx |
|
movl %eax, nbytes_r |
|
movl wsize(%esp), %eax /* prepare for dist compare */ |
|
negl nbytes_r /* nbytes = -nbytes */ |
|
movl window(%esp), from_r /* from = window */ |
|
|
|
cmpl dist_r, %eax |
|
jb .L_invalid_distance_too_far /* if (dist > wsize) */ |
|
|
|
addl dist_r, nbytes_r /* nbytes = dist - nbytes */ |
|
cmpl $0, write(%esp) |
|
jne .L_wrap_around_window_mmx /* if (write != 0) */ |
|
|
|
subl nbytes_r, %eax |
|
addl %eax, from_r /* from += wsize - nbytes */ |
|
|
|
cmpl nbytes_r, len_r |
|
jbe .L_do_copy1_mmx /* if (nbytes >= len) */ |
|
|
|
subl nbytes_r, len_r /* len -= nbytes */ |
|
rep movsb |
|
movl out_r, from_r |
|
subl dist_r, from_r /* from = out - dist */ |
|
jmp .L_do_copy1_mmx |
|
|
|
cmpl nbytes_r, len_r |
|
jbe .L_do_copy1_mmx /* if (nbytes >= len) */ |
|
|
|
subl nbytes_r, len_r /* len -= nbytes */ |
|
rep movsb |
|
movl out_r, from_r |
|
subl dist_r, from_r /* from = out - dist */ |
|
jmp .L_do_copy1_mmx |
|
|
|
.L_wrap_around_window_mmx: |
|
#define write_r %eax |
|
movl write(%esp), write_r |
|
cmpl write_r, nbytes_r |
|
jbe .L_contiguous_in_window_mmx /* if (write >= nbytes) */ |
|
|
|
addl wsize(%esp), from_r |
|
addl write_r, from_r |
|
subl nbytes_r, from_r /* from += wsize + write - nbytes */ |
|
subl write_r, nbytes_r /* nbytes -= write */ |
|
#undef write_r |
|
|
|
cmpl nbytes_r, len_r |
|
jbe .L_do_copy1_mmx /* if (nbytes >= len) */ |
|
|
|
subl nbytes_r, len_r /* len -= nbytes */ |
|
rep movsb |
|
movl window(%esp), from_r /* from = window */ |
|
movl write(%esp), nbytes_r /* nbytes = write */ |
|
cmpl nbytes_r, len_r |
|
jbe .L_do_copy1_mmx /* if (nbytes >= len) */ |
|
|
|
subl nbytes_r, len_r /* len -= nbytes */ |
|
rep movsb |
|
movl out_r, from_r |
|
subl dist_r, from_r /* from = out - dist */ |
|
jmp .L_do_copy1_mmx |
|
|
|
.L_contiguous_in_window_mmx: |
|
#define write_r %eax |
|
addl write_r, from_r |
|
subl nbytes_r, from_r /* from += write - nbytes */ |
|
#undef write_r |
|
|
|
cmpl nbytes_r, len_r |
|
jbe .L_do_copy1_mmx /* if (nbytes >= len) */ |
|
|
|
subl nbytes_r, len_r /* len -= nbytes */ |
|
rep movsb |
|
movl out_r, from_r |
|
subl dist_r, from_r /* from = out - dist */ |
|
|
|
.L_do_copy1_mmx: |
|
#undef nbytes_r |
|
#define in_r %esi |
|
movl len_r, %ecx |
|
rep movsb |
|
|
|
movl in(%esp), in_r /* move in back to %esi, toss from */ |
|
movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */ |
|
jmp .L_while_test_mmx |
|
|
|
#undef hold_r |
|
#undef bitslong_r |
|
|
|
#endif /* USE_MMX || RUN_TIME_MMX */ |
|
|
|
|
|
/*** USE_MMX, NO_MMX, and RUNTIME_MMX from here on ***/ |
|
|
|
.L_invalid_distance_code: |
|
/* else { |
|
* strm->msg = "invalid distance code"; |
|
* state->mode = BAD; |
|
* } |
|
*/ |
|
movl $.L_invalid_distance_code_msg, %ecx |
|
movl $INFLATE_MODE_BAD, %edx |
|
jmp .L_update_stream_state |
|
|
|
.L_test_for_end_of_block: |
|
/* else if (op & 32) { |
|
* state->mode = TYPE; |
|
* break; |
|
* } |
|
*/ |
|
testb $32, %al |
|
jz .L_invalid_literal_length_code /* if ((op & 32) == 0) */ |
|
|
|
movl $0, %ecx |
|
movl $INFLATE_MODE_TYPE, %edx |
|
jmp .L_update_stream_state |
|
|
|
.L_invalid_literal_length_code: |
|
/* else { |
|
* strm->msg = "invalid literal/length code"; |
|
* state->mode = BAD; |
|
* } |
|
*/ |
|
movl $.L_invalid_literal_length_code_msg, %ecx |
|
movl $INFLATE_MODE_BAD, %edx |
|
jmp .L_update_stream_state |
|
|
|
.L_invalid_distance_too_far: |
|
/* strm->msg = "invalid distance too far back"; |
|
* state->mode = BAD; |
|
*/ |
|
movl in(%esp), in_r /* from_r has in's reg, put in back */ |
|
movl $.L_invalid_distance_too_far_msg, %ecx |
|
movl $INFLATE_MODE_BAD, %edx |
|
jmp .L_update_stream_state |
|
|
|
.L_update_stream_state: |
|
/* set strm->msg = %ecx, strm->state->mode = %edx */ |
|
movl strm_sp(%esp), %eax |
|
testl %ecx, %ecx /* if (msg != NULL) */ |
|
jz .L_skip_msg |
|
movl %ecx, msg_strm(%eax) /* strm->msg = msg */ |
|
.L_skip_msg: |
|
movl state_strm(%eax), %eax /* state = strm->state */ |
|
movl %edx, mode_state(%eax) /* state->mode = edx (BAD | TYPE) */ |
|
jmp .L_break_loop |
|
|
|
.align 32,0x90 |
|
.L_break_loop: |
|
|
|
/* |
|
* Regs: |
|
* |
|
* bits = %ebp when mmx, and in %ebx when non-mmx |
|
* hold = %hold_mm when mmx, and in %ebp when non-mmx |
|
* in = %esi |
|
* out = %edi |
|
*/ |
|
|
|
#if defined( USE_MMX ) || defined( RUN_TIME_MMX ) |
|
|
|
#if defined( RUN_TIME_MMX ) |
|
|
|
cmpl $DO_USE_MMX, inflate_fast_use_mmx |
|
jne .L_update_next_in |
|
|
|
#endif /* RUN_TIME_MMX */ |
|
|
|
movl %ebp, %ebx |
|
|
|
.L_update_next_in: |
|
|
|
#endif |
|
|
|
#define strm_r %eax |
|
#define state_r %edx |
|
|
|
/* len = bits >> 3; |
|
* in -= len; |
|
* bits -= len << 3; |
|
* hold &= (1U << bits) - 1; |
|
* state->hold = hold; |
|
* state->bits = bits; |
|
* strm->next_in = in; |
|
* strm->next_out = out; |
|
*/ |
|
movl strm_sp(%esp), strm_r |
|
movl %ebx, %ecx |
|
movl state_strm(strm_r), state_r |
|
shrl $3, %ecx |
|
subl %ecx, in_r |
|
shll $3, %ecx |
|
subl %ecx, %ebx |
|
movl out_r, next_out_strm(strm_r) |
|
movl %ebx, bits_state(state_r) |
|
movl %ebx, %ecx |
|
|
|
leal buf(%esp), %ebx |
|
cmpl %ebx, last(%esp) |
|
jne .L_buf_not_used /* if buf != last */ |
|
|
|
subl %ebx, in_r /* in -= buf */ |
|
movl next_in_strm(strm_r), %ebx |
|
movl %ebx, last(%esp) /* last = strm->next_in */ |
|
addl %ebx, in_r /* in += strm->next_in */ |
|
movl avail_in_strm(strm_r), %ebx |
|
subl $11, %ebx |
|
addl %ebx, last(%esp) /* last = &strm->next_in[ avail_in - 11 ] */ |
|
|
|
.L_buf_not_used: |
|
movl in_r, next_in_strm(strm_r) |
|
|
|
movl $1, %ebx |
|
shll %cl, %ebx |
|
decl %ebx |
|
|
|
#if defined( USE_MMX ) || defined( RUN_TIME_MMX ) |
|
|
|
#if defined( RUN_TIME_MMX ) |
|
|
|
cmpl $DO_USE_MMX, inflate_fast_use_mmx |
|
jne .L_update_hold |
|
|
|
#endif /* RUN_TIME_MMX */ |
|
|
|
psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ |
|
movd hold_mm, %ebp |
|
|
|
emms |
|
|
|
.L_update_hold: |
|
|
|
#endif /* USE_MMX || RUN_TIME_MMX */ |
|
|
|
andl %ebx, %ebp |
|
movl %ebp, hold_state(state_r) |
|
|
|
#define last_r %ebx |
|
|
|
/* strm->avail_in = in < last ? 11 + (last - in) : 11 - (in - last) */ |
|
movl last(%esp), last_r |
|
cmpl in_r, last_r |
|
jbe .L_last_is_smaller /* if (in >= last) */ |
|
|
|
subl in_r, last_r /* last -= in */ |
|
addl $11, last_r /* last += 11 */ |
|
movl last_r, avail_in_strm(strm_r) |
|
jmp .L_fixup_out |
|
.L_last_is_smaller: |
|
subl last_r, in_r /* in -= last */ |
|
negl in_r /* in = -in */ |
|
addl $11, in_r /* in += 11 */ |
|
movl in_r, avail_in_strm(strm_r) |
|
|
|
#undef last_r |
|
#define end_r %ebx |
|
|
|
.L_fixup_out: |
|
/* strm->avail_out = out < end ? 257 + (end - out) : 257 - (out - end)*/ |
|
movl end(%esp), end_r |
|
cmpl out_r, end_r |
|
jbe .L_end_is_smaller /* if (out >= end) */ |
|
|
|
subl out_r, end_r /* end -= out */ |
|
addl $257, end_r /* end += 257 */ |
|
movl end_r, avail_out_strm(strm_r) |
|
jmp .L_done |
|
.L_end_is_smaller: |
|
subl end_r, out_r /* out -= end */ |
|
negl out_r /* out = -out */ |
|
addl $257, out_r /* out += 257 */ |
|
movl out_r, avail_out_strm(strm_r) |
|
|
|
#undef end_r |
|
#undef strm_r |
|
#undef state_r |
|
|
|
.L_done: |
|
addl $local_var_size, %esp |
|
popf |
|
popl %ebx |
|
popl %ebp |
|
popl %esi |
|
popl %edi |
|
ret |
|
|
|
#if defined( GAS_ELF ) |
|
/* elf info */ |
|
.type inflate_fast,@function |
|
.size inflate_fast,.-inflate_fast |
|
#endif
|
|
|