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author | William Joye <wjoye@cfa.harvard.edu> | 2019-01-18 20:45:28 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2019-01-18 20:45:28 (GMT) |
commit | 6a058cf92088671fdcd293c4d0df26515fc56622 (patch) | |
tree | 819912e4f8b0d2f25aa18ec936fd59eb65098a56 /zlib/contrib/inflate86/inffas86.c | |
parent | fad7f6008c4c496ef14f140de7bc01e3b541e22b (diff) | |
download | blt-6a058cf92088671fdcd293c4d0df26515fc56622.zip blt-6a058cf92088671fdcd293c4d0df26515fc56622.tar.gz blt-6a058cf92088671fdcd293c4d0df26515fc56622.tar.bz2 |
rm zlib
Diffstat (limited to 'zlib/contrib/inflate86/inffas86.c')
-rw-r--r-- | zlib/contrib/inflate86/inffas86.c | 1157 |
1 files changed, 0 insertions, 1157 deletions
diff --git a/zlib/contrib/inflate86/inffas86.c b/zlib/contrib/inflate86/inffas86.c deleted file mode 100644 index 7292f67..0000000 --- a/zlib/contrib/inflate86/inffas86.c +++ /dev/null @@ -1,1157 +0,0 @@ -/* inffas86.c is a hand tuned assembler version of - * - * inffast.c -- fast decoding - * Copyright (C) 1995-2003 Mark Adler - * For conditions of distribution and use, see copyright notice in zlib.h - * - * Copyright (C) 2003 Chris Anderson <christop@charm.net> - * Please use the copyright conditions above. - * - * Dec-29-2003 -- I added AMD64 inflate asm support. This version is also - * slightly quicker on x86 systems because, instead of using rep movsb to copy - * data, it uses rep movsw, which moves data in 2-byte chunks instead of single - * bytes. I've tested the AMD64 code on a Fedora Core 1 + the x86_64 updates - * from http://fedora.linux.duke.edu/fc1_x86_64 - * which is running on an Athlon 64 3000+ / Gigabyte GA-K8VT800M system with - * 1GB ram. The 64-bit version is about 4% faster than the 32-bit version, - * when decompressing mozilla-source-1.3.tar.gz. - * - * Mar-13-2003 -- Most of this is derived from inffast.S which is derived from - * the gcc -S output of zlib-1.2.0/inffast.c. Zlib-1.2.0 is in beta release at - * the moment. I have successfully compiled and tested this code with gcc2.96, - * gcc3.2, icc5.0, msvc6.0. It is very close to the speed of inffast.S - * compiled with gcc -DNO_MMX, but inffast.S is still faster on the P3 with MMX - * enabled. I will attempt to merge the MMX code into this version. Newer - * versions of this and inffast.S can be found at - * http://www.eetbeetee.com/zlib/ and http://www.charm.net/~christop/zlib/ - */ - -#include "zutil.h" -#include "inftrees.h" -#include "inflate.h" -#include "inffast.h" - -/* Mark Adler's comments from inffast.c: */ - -/* - Decode literal, length, and distance codes and write out the resulting - literal and match bytes until either not enough input or output is - available, an end-of-block is encountered, or a data error is encountered. - When large enough input and output buffers are supplied to inflate(), for - example, a 16K input buffer and a 64K output buffer, more than 95% of the - inflate execution time is spent in this routine. - - Entry assumptions: - - state->mode == LEN - strm->avail_in >= 6 - strm->avail_out >= 258 - start >= strm->avail_out - state->bits < 8 - - On return, state->mode is one of: - - LEN -- ran out of enough output space or enough available input - TYPE -- reached end of block code, inflate() to interpret next block - BAD -- error in block data - - Notes: - - - The maximum input bits used by a length/distance pair is 15 bits for the - length code, 5 bits for the length extra, 15 bits for the distance code, - and 13 bits for the distance extra. This totals 48 bits, or six bytes. - Therefore if strm->avail_in >= 6, then there is enough input to avoid - checking for available input while decoding. - - - The maximum bytes that a single length/distance pair can output is 258 - bytes, which is the maximum length that can be coded. inflate_fast() - requires strm->avail_out >= 258 for each loop to avoid checking for - output space. - */ -void inflate_fast(strm, start) -z_streamp strm; -unsigned start; /* inflate()'s starting value for strm->avail_out */ -{ - struct inflate_state FAR *state; - struct inffast_ar { -/* 64 32 x86 x86_64 */ -/* ar offset register */ -/* 0 0 */ void *esp; /* esp save */ -/* 8 4 */ void *ebp; /* ebp save */ -/* 16 8 */ unsigned char FAR *in; /* esi rsi local strm->next_in */ -/* 24 12 */ unsigned char FAR *last; /* r9 while in < last */ -/* 32 16 */ unsigned char FAR *out; /* edi rdi local strm->next_out */ -/* 40 20 */ unsigned char FAR *beg; /* inflate()'s init next_out */ -/* 48 24 */ unsigned char FAR *end; /* r10 while out < end */ -/* 56 28 */ unsigned char FAR *window;/* size of window, wsize!=0 */ -/* 64 32 */ code const FAR *lcode; /* ebp rbp local strm->lencode */ -/* 72 36 */ code const FAR *dcode; /* r11 local strm->distcode */ -/* 80 40 */ unsigned long hold; /* edx rdx local strm->hold */ -/* 88 44 */ unsigned bits; /* ebx rbx local strm->bits */ -/* 92 48 */ unsigned wsize; /* window size */ -/* 96 52 */ unsigned write; /* window write index */ -/*100 56 */ unsigned lmask; /* r12 mask for lcode */ -/*104 60 */ unsigned dmask; /* r13 mask for dcode */ -/*108 64 */ unsigned len; /* r14 match length */ -/*112 68 */ unsigned dist; /* r15 match distance */ -/*116 72 */ unsigned status; /* set when state chng*/ - } ar; - -#if defined( __GNUC__ ) && defined( __amd64__ ) && ! defined( __i386 ) -#define PAD_AVAIL_IN 6 -#define PAD_AVAIL_OUT 258 -#else -#define PAD_AVAIL_IN 5 -#define PAD_AVAIL_OUT 257 -#endif - - /* copy state to local variables */ - state = (struct inflate_state FAR *)strm->state; - ar.in = strm->next_in; - ar.last = ar.in + (strm->avail_in - PAD_AVAIL_IN); - ar.out = strm->next_out; - ar.beg = ar.out - (start - strm->avail_out); - ar.end = ar.out + (strm->avail_out - PAD_AVAIL_OUT); - ar.wsize = state->wsize; - ar.write = state->wnext; - ar.window = state->window; - ar.hold = state->hold; - ar.bits = state->bits; - ar.lcode = state->lencode; - ar.dcode = state->distcode; - ar.lmask = (1U << state->lenbits) - 1; - ar.dmask = (1U << state->distbits) - 1; - - /* decode literals and length/distances until end-of-block or not enough - input data or output space */ - - /* align in on 1/2 hold size boundary */ - while (((unsigned long)(void *)ar.in & (sizeof(ar.hold) / 2 - 1)) != 0) { - ar.hold += (unsigned long)*ar.in++ << ar.bits; - ar.bits += 8; - } - -#if defined( __GNUC__ ) && defined( __amd64__ ) && ! defined( __i386 ) - __asm__ __volatile__ ( -" leaq %0, %%rax\n" -" movq %%rbp, 8(%%rax)\n" /* save regs rbp and rsp */ -" movq %%rsp, (%%rax)\n" -" movq %%rax, %%rsp\n" /* make rsp point to &ar */ -" movq 16(%%rsp), %%rsi\n" /* rsi = in */ -" movq 32(%%rsp), %%rdi\n" /* rdi = out */ -" movq 24(%%rsp), %%r9\n" /* r9 = last */ -" movq 48(%%rsp), %%r10\n" /* r10 = end */ -" movq 64(%%rsp), %%rbp\n" /* rbp = lcode */ -" movq 72(%%rsp), %%r11\n" /* r11 = dcode */ -" movq 80(%%rsp), %%rdx\n" /* rdx = hold */ -" movl 88(%%rsp), %%ebx\n" /* ebx = bits */ -" movl 100(%%rsp), %%r12d\n" /* r12d = lmask */ -" movl 104(%%rsp), %%r13d\n" /* r13d = dmask */ - /* r14d = len */ - /* r15d = dist */ -" cld\n" -" cmpq %%rdi, %%r10\n" -" je .L_one_time\n" /* if only one decode left */ -" cmpq %%rsi, %%r9\n" -" je .L_one_time\n" -" jmp .L_do_loop\n" - -".L_one_time:\n" -" movq %%r12, %%r8\n" /* r8 = lmask */ -" cmpb $32, %%bl\n" -" ja .L_get_length_code_one_time\n" - -" lodsl\n" /* eax = *(uint *)in++ */ -" movb %%bl, %%cl\n" /* cl = bits, needs it for shifting */ -" addb $32, %%bl\n" /* bits += 32 */ -" shlq %%cl, %%rax\n" -" orq %%rax, %%rdx\n" /* hold |= *((uint *)in)++ << bits */ -" jmp .L_get_length_code_one_time\n" - -".align 32,0x90\n" -".L_while_test:\n" -" cmpq %%rdi, %%r10\n" -" jbe .L_break_loop\n" -" cmpq %%rsi, %%r9\n" -" jbe .L_break_loop\n" - -".L_do_loop:\n" -" movq %%r12, %%r8\n" /* r8 = lmask */ -" cmpb $32, %%bl\n" -" ja .L_get_length_code\n" /* if (32 < bits) */ - -" lodsl\n" /* eax = *(uint *)in++ */ -" movb %%bl, %%cl\n" /* cl = bits, needs it for shifting */ -" addb $32, %%bl\n" /* bits += 32 */ -" shlq %%cl, %%rax\n" -" orq %%rax, %%rdx\n" /* hold |= *((uint *)in)++ << bits */ - -".L_get_length_code:\n" -" andq %%rdx, %%r8\n" /* r8 &= hold */ -" movl (%%rbp,%%r8,4), %%eax\n" /* eax = lcode[hold & lmask] */ - -" movb %%ah, %%cl\n" /* cl = this.bits */ -" subb %%ah, %%bl\n" /* bits -= this.bits */ -" shrq %%cl, %%rdx\n" /* hold >>= this.bits */ - -" testb %%al, %%al\n" -" jnz .L_test_for_length_base\n" /* if (op != 0) 45.7% */ - -" movq %%r12, %%r8\n" /* r8 = lmask */ -" shrl $16, %%eax\n" /* output this.val char */ -" stosb\n" - -".L_get_length_code_one_time:\n" -" andq %%rdx, %%r8\n" /* r8 &= hold */ -" movl (%%rbp,%%r8,4), %%eax\n" /* eax = lcode[hold & lmask] */ - -".L_dolen:\n" -" movb %%ah, %%cl\n" /* cl = this.bits */ -" subb %%ah, %%bl\n" /* bits -= this.bits */ -" shrq %%cl, %%rdx\n" /* hold >>= this.bits */ - -" testb %%al, %%al\n" -" jnz .L_test_for_length_base\n" /* if (op != 0) 45.7% */ - -" shrl $16, %%eax\n" /* output this.val char */ -" stosb\n" -" jmp .L_while_test\n" - -".align 32,0x90\n" -".L_test_for_length_base:\n" -" movl %%eax, %%r14d\n" /* len = this */ -" shrl $16, %%r14d\n" /* len = this.val */ -" movb %%al, %%cl\n" - -" testb $16, %%al\n" -" jz .L_test_for_second_level_length\n" /* if ((op & 16) == 0) 8% */ -" andb $15, %%cl\n" /* op &= 15 */ -" jz .L_decode_distance\n" /* if (!op) */ - -".L_add_bits_to_len:\n" -" subb %%cl, %%bl\n" -" xorl %%eax, %%eax\n" -" incl %%eax\n" -" shll %%cl, %%eax\n" -" decl %%eax\n" -" andl %%edx, %%eax\n" /* eax &= hold */ -" shrq %%cl, %%rdx\n" -" addl %%eax, %%r14d\n" /* len += hold & mask[op] */ - -".L_decode_distance:\n" -" movq %%r13, %%r8\n" /* r8 = dmask */ -" cmpb $32, %%bl\n" -" ja .L_get_distance_code\n" /* if (32 < bits) */ - -" lodsl\n" /* eax = *(uint *)in++ */ -" movb %%bl, %%cl\n" /* cl = bits, needs it for shifting */ -" addb $32, %%bl\n" /* bits += 32 */ -" shlq %%cl, %%rax\n" -" orq %%rax, %%rdx\n" /* hold |= *((uint *)in)++ << bits */ - -".L_get_distance_code:\n" -" andq %%rdx, %%r8\n" /* r8 &= hold */ -" movl (%%r11,%%r8,4), %%eax\n" /* eax = dcode[hold & dmask] */ - -".L_dodist:\n" -" movl %%eax, %%r15d\n" /* dist = this */ -" shrl $16, %%r15d\n" /* dist = this.val */ -" movb %%ah, %%cl\n" -" subb %%ah, %%bl\n" /* bits -= this.bits */ -" shrq %%cl, %%rdx\n" /* hold >>= this.bits */ -" movb %%al, %%cl\n" /* cl = this.op */ - -" testb $16, %%al\n" /* if ((op & 16) == 0) */ -" jz .L_test_for_second_level_dist\n" -" andb $15, %%cl\n" /* op &= 15 */ -" jz .L_check_dist_one\n" - -".L_add_bits_to_dist:\n" -" subb %%cl, %%bl\n" -" xorl %%eax, %%eax\n" -" incl %%eax\n" -" shll %%cl, %%eax\n" -" decl %%eax\n" /* (1 << op) - 1 */ -" andl %%edx, %%eax\n" /* eax &= hold */ -" shrq %%cl, %%rdx\n" -" addl %%eax, %%r15d\n" /* dist += hold & ((1 << op) - 1) */ - -".L_check_window:\n" -" movq %%rsi, %%r8\n" /* save in so from can use it's reg */ -" movq %%rdi, %%rax\n" -" subq 40(%%rsp), %%rax\n" /* nbytes = out - beg */ - -" cmpl %%r15d, %%eax\n" -" jb .L_clip_window\n" /* if (dist > nbytes) 4.2% */ - -" movl %%r14d, %%ecx\n" /* ecx = len */ -" movq %%rdi, %%rsi\n" -" subq %%r15, %%rsi\n" /* from = out - dist */ - -" sarl %%ecx\n" -" jnc .L_copy_two\n" /* if len % 2 == 0 */ - -" rep movsw\n" -" movb (%%rsi), %%al\n" -" movb %%al, (%%rdi)\n" -" incq %%rdi\n" - -" movq %%r8, %%rsi\n" /* move in back to %rsi, toss from */ -" jmp .L_while_test\n" - -".L_copy_two:\n" -" rep movsw\n" -" movq %%r8, %%rsi\n" /* move in back to %rsi, toss from */ -" jmp .L_while_test\n" - -".align 32,0x90\n" -".L_check_dist_one:\n" -" cmpl $1, %%r15d\n" /* if dist 1, is a memset */ -" jne .L_check_window\n" -" cmpq %%rdi, 40(%%rsp)\n" /* if out == beg, outside window */ -" je .L_check_window\n" - -" movl %%r14d, %%ecx\n" /* ecx = len */ -" movb -1(%%rdi), %%al\n" -" movb %%al, %%ah\n" - -" sarl %%ecx\n" -" jnc .L_set_two\n" -" movb %%al, (%%rdi)\n" -" incq %%rdi\n" - -".L_set_two:\n" -" rep stosw\n" -" jmp .L_while_test\n" - -".align 32,0x90\n" -".L_test_for_second_level_length:\n" -" testb $64, %%al\n" -" jnz .L_test_for_end_of_block\n" /* if ((op & 64) != 0) */ - -" xorl %%eax, %%eax\n" -" incl %%eax\n" -" shll %%cl, %%eax\n" -" decl %%eax\n" -" andl %%edx, %%eax\n" /* eax &= hold */ -" addl %%r14d, %%eax\n" /* eax += len */ -" movl (%%rbp,%%rax,4), %%eax\n" /* eax = lcode[val+(hold&mask[op])]*/ -" jmp .L_dolen\n" - -".align 32,0x90\n" -".L_test_for_second_level_dist:\n" -" testb $64, %%al\n" -" jnz .L_invalid_distance_code\n" /* if ((op & 64) != 0) */ - -" xorl %%eax, %%eax\n" -" incl %%eax\n" -" shll %%cl, %%eax\n" -" decl %%eax\n" -" andl %%edx, %%eax\n" /* eax &= hold */ -" addl %%r15d, %%eax\n" /* eax += dist */ -" movl (%%r11,%%rax,4), %%eax\n" /* eax = dcode[val+(hold&mask[op])]*/ -" jmp .L_dodist\n" - -".align 32,0x90\n" -".L_clip_window:\n" -" movl %%eax, %%ecx\n" /* ecx = nbytes */ -" movl 92(%%rsp), %%eax\n" /* eax = wsize, prepare for dist cmp */ -" negl %%ecx\n" /* nbytes = -nbytes */ - -" cmpl %%r15d, %%eax\n" -" jb .L_invalid_distance_too_far\n" /* if (dist > wsize) */ - -" addl %%r15d, %%ecx\n" /* nbytes = dist - nbytes */ -" cmpl $0, 96(%%rsp)\n" -" jne .L_wrap_around_window\n" /* if (write != 0) */ - -" movq 56(%%rsp), %%rsi\n" /* from = window */ -" subl %%ecx, %%eax\n" /* eax -= nbytes */ -" addq %%rax, %%rsi\n" /* from += wsize - nbytes */ - -" movl %%r14d, %%eax\n" /* eax = len */ -" cmpl %%ecx, %%r14d\n" -" jbe .L_do_copy\n" /* if (nbytes >= len) */ - -" subl %%ecx, %%eax\n" /* eax -= nbytes */ -" rep movsb\n" -" movq %%rdi, %%rsi\n" -" subq %%r15, %%rsi\n" /* from = &out[ -dist ] */ -" jmp .L_do_copy\n" - -".align 32,0x90\n" -".L_wrap_around_window:\n" -" movl 96(%%rsp), %%eax\n" /* eax = write */ -" cmpl %%eax, %%ecx\n" -" jbe .L_contiguous_in_window\n" /* if (write >= nbytes) */ - -" movl 92(%%rsp), %%esi\n" /* from = wsize */ -" addq 56(%%rsp), %%rsi\n" /* from += window */ -" addq %%rax, %%rsi\n" /* from += write */ -" subq %%rcx, %%rsi\n" /* from -= nbytes */ -" subl %%eax, %%ecx\n" /* nbytes -= write */ - -" movl %%r14d, %%eax\n" /* eax = len */ -" cmpl %%ecx, %%eax\n" -" jbe .L_do_copy\n" /* if (nbytes >= len) */ - -" subl %%ecx, %%eax\n" /* len -= nbytes */ -" rep movsb\n" -" movq 56(%%rsp), %%rsi\n" /* from = window */ -" movl 96(%%rsp), %%ecx\n" /* nbytes = write */ -" cmpl %%ecx, %%eax\n" -" jbe .L_do_copy\n" /* if (nbytes >= len) */ - -" subl %%ecx, %%eax\n" /* len -= nbytes */ -" rep movsb\n" -" movq %%rdi, %%rsi\n" -" subq %%r15, %%rsi\n" /* from = out - dist */ -" jmp .L_do_copy\n" - -".align 32,0x90\n" -".L_contiguous_in_window:\n" -" movq 56(%%rsp), %%rsi\n" /* rsi = window */ -" addq %%rax, %%rsi\n" -" subq %%rcx, %%rsi\n" /* from += write - nbytes */ - -" movl %%r14d, %%eax\n" /* eax = len */ -" cmpl %%ecx, %%eax\n" -" jbe .L_do_copy\n" /* if (nbytes >= len) */ - -" subl %%ecx, %%eax\n" /* len -= nbytes */ -" rep movsb\n" -" movq %%rdi, %%rsi\n" -" subq %%r15, %%rsi\n" /* from = out - dist */ -" jmp .L_do_copy\n" /* if (nbytes >= len) */ - -".align 32,0x90\n" -".L_do_copy:\n" -" movl %%eax, %%ecx\n" /* ecx = len */ -" rep movsb\n" - -" movq %%r8, %%rsi\n" /* move in back to %esi, toss from */ -" jmp .L_while_test\n" - -".L_test_for_end_of_block:\n" -" testb $32, %%al\n" -" jz .L_invalid_literal_length_code\n" -" movl $1, 116(%%rsp)\n" -" jmp .L_break_loop_with_status\n" - -".L_invalid_literal_length_code:\n" -" movl $2, 116(%%rsp)\n" -" jmp .L_break_loop_with_status\n" - -".L_invalid_distance_code:\n" -" movl $3, 116(%%rsp)\n" -" jmp .L_break_loop_with_status\n" - -".L_invalid_distance_too_far:\n" -" movl $4, 116(%%rsp)\n" -" jmp .L_break_loop_with_status\n" - -".L_break_loop:\n" -" movl $0, 116(%%rsp)\n" - -".L_break_loop_with_status:\n" -/* put in, out, bits, and hold back into ar and pop esp */ -" movq %%rsi, 16(%%rsp)\n" /* in */ -" movq %%rdi, 32(%%rsp)\n" /* out */ -" movl %%ebx, 88(%%rsp)\n" /* bits */ -" movq %%rdx, 80(%%rsp)\n" /* hold */ -" movq (%%rsp), %%rax\n" /* restore rbp and rsp */ -" movq 8(%%rsp), %%rbp\n" -" movq %%rax, %%rsp\n" - : - : "m" (ar) - : "memory", "%rax", "%rbx", "%rcx", "%rdx", "%rsi", "%rdi", - "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15" - ); -#elif ( defined( __GNUC__ ) || defined( __ICC ) ) && defined( __i386 ) - __asm__ __volatile__ ( -" leal %0, %%eax\n" -" movl %%esp, (%%eax)\n" /* save esp, ebp */ -" movl %%ebp, 4(%%eax)\n" -" movl %%eax, %%esp\n" -" movl 8(%%esp), %%esi\n" /* esi = in */ -" movl 16(%%esp), %%edi\n" /* edi = out */ -" movl 40(%%esp), %%edx\n" /* edx = hold */ -" movl 44(%%esp), %%ebx\n" /* ebx = bits */ -" movl 32(%%esp), %%ebp\n" /* ebp = lcode */ - -" cld\n" -" jmp .L_do_loop\n" - -".align 32,0x90\n" -".L_while_test:\n" -" cmpl %%edi, 24(%%esp)\n" /* out < end */ -" jbe .L_break_loop\n" -" cmpl %%esi, 12(%%esp)\n" /* in < last */ -" jbe .L_break_loop\n" - -".L_do_loop:\n" -" cmpb $15, %%bl\n" -" ja .L_get_length_code\n" /* if (15 < bits) */ - -" xorl %%eax, %%eax\n" -" lodsw\n" /* al = *(ushort *)in++ */ -" movb %%bl, %%cl\n" /* cl = bits, needs it for shifting */ -" addb $16, %%bl\n" /* bits += 16 */ -" shll %%cl, %%eax\n" -" orl %%eax, %%edx\n" /* hold |= *((ushort *)in)++ << bits */ - -".L_get_length_code:\n" -" movl 56(%%esp), %%eax\n" /* eax = lmask */ -" andl %%edx, %%eax\n" /* eax &= hold */ -" movl (%%ebp,%%eax,4), %%eax\n" /* eax = lcode[hold & lmask] */ - -".L_dolen:\n" -" movb %%ah, %%cl\n" /* cl = this.bits */ -" subb %%ah, %%bl\n" /* bits -= this.bits */ -" shrl %%cl, %%edx\n" /* hold >>= this.bits */ - -" testb %%al, %%al\n" -" jnz .L_test_for_length_base\n" /* if (op != 0) 45.7% */ - -" shrl $16, %%eax\n" /* output this.val char */ -" stosb\n" -" jmp .L_while_test\n" - -".align 32,0x90\n" -".L_test_for_length_base:\n" -" movl %%eax, %%ecx\n" /* len = this */ -" shrl $16, %%ecx\n" /* len = this.val */ -" movl %%ecx, 64(%%esp)\n" /* save len */ -" movb %%al, %%cl\n" - -" testb $16, %%al\n" -" jz .L_test_for_second_level_length\n" /* if ((op & 16) == 0) 8% */ -" andb $15, %%cl\n" /* op &= 15 */ -" jz .L_decode_distance\n" /* if (!op) */ -" cmpb %%cl, %%bl\n" -" jae .L_add_bits_to_len\n" /* if (op <= bits) */ - -" movb %%cl, %%ch\n" /* stash op in ch, freeing cl */ -" xorl %%eax, %%eax\n" -" lodsw\n" /* al = *(ushort *)in++ */ -" movb %%bl, %%cl\n" /* cl = bits, needs it for shifting */ -" addb $16, %%bl\n" /* bits += 16 */ -" shll %%cl, %%eax\n" -" orl %%eax, %%edx\n" /* hold |= *((ushort *)in)++ << bits */ -" movb %%ch, %%cl\n" /* move op back to ecx */ - -".L_add_bits_to_len:\n" -" subb %%cl, %%bl\n" -" xorl %%eax, %%eax\n" -" incl %%eax\n" -" shll %%cl, %%eax\n" -" decl %%eax\n" -" andl %%edx, %%eax\n" /* eax &= hold */ -" shrl %%cl, %%edx\n" -" addl %%eax, 64(%%esp)\n" /* len += hold & mask[op] */ - -".L_decode_distance:\n" -" cmpb $15, %%bl\n" -" ja .L_get_distance_code\n" /* if (15 < bits) */ - -" xorl %%eax, %%eax\n" -" lodsw\n" /* al = *(ushort *)in++ */ -" movb %%bl, %%cl\n" /* cl = bits, needs it for shifting */ -" addb $16, %%bl\n" /* bits += 16 */ -" shll %%cl, %%eax\n" -" orl %%eax, %%edx\n" /* hold |= *((ushort *)in)++ << bits */ - -".L_get_distance_code:\n" -" movl 60(%%esp), %%eax\n" /* eax = dmask */ -" movl 36(%%esp), %%ecx\n" /* ecx = dcode */ -" andl %%edx, %%eax\n" /* eax &= hold */ -" movl (%%ecx,%%eax,4), %%eax\n"/* eax = dcode[hold & dmask] */ - -".L_dodist:\n" -" movl %%eax, %%ebp\n" /* dist = this */ -" shrl $16, %%ebp\n" /* dist = this.val */ -" movb %%ah, %%cl\n" -" subb %%ah, %%bl\n" /* bits -= this.bits */ -" shrl %%cl, %%edx\n" /* hold >>= this.bits */ -" movb %%al, %%cl\n" /* cl = this.op */ - -" testb $16, %%al\n" /* if ((op & 16) == 0) */ -" jz .L_test_for_second_level_dist\n" -" andb $15, %%cl\n" /* op &= 15 */ -" jz .L_check_dist_one\n" -" cmpb %%cl, %%bl\n" -" jae .L_add_bits_to_dist\n" /* if (op <= bits) 97.6% */ - -" movb %%cl, %%ch\n" /* stash op in ch, freeing cl */ -" xorl %%eax, %%eax\n" -" lodsw\n" /* al = *(ushort *)in++ */ -" movb %%bl, %%cl\n" /* cl = bits, needs it for shifting */ -" addb $16, %%bl\n" /* bits += 16 */ -" shll %%cl, %%eax\n" -" orl %%eax, %%edx\n" /* hold |= *((ushort *)in)++ << bits */ -" movb %%ch, %%cl\n" /* move op back to ecx */ - -".L_add_bits_to_dist:\n" -" subb %%cl, %%bl\n" -" xorl %%eax, %%eax\n" -" incl %%eax\n" -" shll %%cl, %%eax\n" -" decl %%eax\n" /* (1 << op) - 1 */ -" andl %%edx, %%eax\n" /* eax &= hold */ -" shrl %%cl, %%edx\n" -" addl %%eax, %%ebp\n" /* dist += hold & ((1 << op) - 1) */ - -".L_check_window:\n" -" movl %%esi, 8(%%esp)\n" /* save in so from can use it's reg */ -" movl %%edi, %%eax\n" -" subl 20(%%esp), %%eax\n" /* nbytes = out - beg */ - -" cmpl %%ebp, %%eax\n" -" jb .L_clip_window\n" /* if (dist > nbytes) 4.2% */ - -" movl 64(%%esp), %%ecx\n" /* ecx = len */ -" movl %%edi, %%esi\n" -" subl %%ebp, %%esi\n" /* from = out - dist */ - -" sarl %%ecx\n" -" jnc .L_copy_two\n" /* if len % 2 == 0 */ - -" rep movsw\n" -" movb (%%esi), %%al\n" -" movb %%al, (%%edi)\n" -" incl %%edi\n" - -" movl 8(%%esp), %%esi\n" /* move in back to %esi, toss from */ -" movl 32(%%esp), %%ebp\n" /* ebp = lcode */ -" jmp .L_while_test\n" - -".L_copy_two:\n" -" rep movsw\n" -" movl 8(%%esp), %%esi\n" /* move in back to %esi, toss from */ -" movl 32(%%esp), %%ebp\n" /* ebp = lcode */ -" jmp .L_while_test\n" - -".align 32,0x90\n" -".L_check_dist_one:\n" -" cmpl $1, %%ebp\n" /* if dist 1, is a memset */ -" jne .L_check_window\n" -" cmpl %%edi, 20(%%esp)\n" -" je .L_check_window\n" /* out == beg, if outside window */ - -" movl 64(%%esp), %%ecx\n" /* ecx = len */ -" movb -1(%%edi), %%al\n" -" movb %%al, %%ah\n" - -" sarl %%ecx\n" -" jnc .L_set_two\n" -" movb %%al, (%%edi)\n" -" incl %%edi\n" - -".L_set_two:\n" -" rep stosw\n" -" movl 32(%%esp), %%ebp\n" /* ebp = lcode */ -" jmp .L_while_test\n" - -".align 32,0x90\n" -".L_test_for_second_level_length:\n" -" testb $64, %%al\n" -" jnz .L_test_for_end_of_block\n" /* if ((op & 64) != 0) */ - -" xorl %%eax, %%eax\n" -" incl %%eax\n" -" shll %%cl, %%eax\n" -" decl %%eax\n" -" andl %%edx, %%eax\n" /* eax &= hold */ -" addl 64(%%esp), %%eax\n" /* eax += len */ -" movl (%%ebp,%%eax,4), %%eax\n" /* eax = lcode[val+(hold&mask[op])]*/ -" jmp .L_dolen\n" - -".align 32,0x90\n" -".L_test_for_second_level_dist:\n" -" testb $64, %%al\n" -" jnz .L_invalid_distance_code\n" /* if ((op & 64) != 0) */ - -" xorl %%eax, %%eax\n" -" incl %%eax\n" -" shll %%cl, %%eax\n" -" decl %%eax\n" -" andl %%edx, %%eax\n" /* eax &= hold */ -" addl %%ebp, %%eax\n" /* eax += dist */ -" movl 36(%%esp), %%ecx\n" /* ecx = dcode */ -" movl (%%ecx,%%eax,4), %%eax\n" /* eax = dcode[val+(hold&mask[op])]*/ -" jmp .L_dodist\n" - -".align 32,0x90\n" -".L_clip_window:\n" -" movl %%eax, %%ecx\n" -" movl 48(%%esp), %%eax\n" /* eax = wsize */ -" negl %%ecx\n" /* nbytes = -nbytes */ -" movl 28(%%esp), %%esi\n" /* from = window */ - -" cmpl %%ebp, %%eax\n" -" jb .L_invalid_distance_too_far\n" /* if (dist > wsize) */ - -" addl %%ebp, %%ecx\n" /* nbytes = dist - nbytes */ -" cmpl $0, 52(%%esp)\n" -" jne .L_wrap_around_window\n" /* if (write != 0) */ - -" subl %%ecx, %%eax\n" -" addl %%eax, %%esi\n" /* from += wsize - nbytes */ - -" movl 64(%%esp), %%eax\n" /* eax = len */ -" cmpl %%ecx, %%eax\n" -" jbe .L_do_copy\n" /* if (nbytes >= len) */ - -" subl %%ecx, %%eax\n" /* len -= nbytes */ -" rep movsb\n" -" movl %%edi, %%esi\n" -" subl %%ebp, %%esi\n" /* from = out - dist */ -" jmp .L_do_copy\n" - -".align 32,0x90\n" -".L_wrap_around_window:\n" -" movl 52(%%esp), %%eax\n" /* eax = write */ -" cmpl %%eax, %%ecx\n" -" jbe .L_contiguous_in_window\n" /* if (write >= nbytes) */ - -" addl 48(%%esp), %%esi\n" /* from += wsize */ -" addl %%eax, %%esi\n" /* from += write */ -" subl %%ecx, %%esi\n" /* from -= nbytes */ -" subl %%eax, %%ecx\n" /* nbytes -= write */ - -" movl 64(%%esp), %%eax\n" /* eax = len */ -" cmpl %%ecx, %%eax\n" -" jbe .L_do_copy\n" /* if (nbytes >= len) */ - -" subl %%ecx, %%eax\n" /* len -= nbytes */ -" rep movsb\n" -" movl 28(%%esp), %%esi\n" /* from = window */ -" movl 52(%%esp), %%ecx\n" /* nbytes = write */ -" cmpl %%ecx, %%eax\n" -" jbe .L_do_copy\n" /* if (nbytes >= len) */ - -" subl %%ecx, %%eax\n" /* len -= nbytes */ -" rep movsb\n" -" movl %%edi, %%esi\n" -" subl %%ebp, %%esi\n" /* from = out - dist */ -" jmp .L_do_copy\n" - -".align 32,0x90\n" -".L_contiguous_in_window:\n" -" addl %%eax, %%esi\n" -" subl %%ecx, %%esi\n" /* from += write - nbytes */ - -" movl 64(%%esp), %%eax\n" /* eax = len */ -" cmpl %%ecx, %%eax\n" -" jbe .L_do_copy\n" /* if (nbytes >= len) */ - -" subl %%ecx, %%eax\n" /* len -= nbytes */ -" rep movsb\n" -" movl %%edi, %%esi\n" -" subl %%ebp, %%esi\n" /* from = out - dist */ -" jmp .L_do_copy\n" /* if (nbytes >= len) */ - -".align 32,0x90\n" -".L_do_copy:\n" -" movl %%eax, %%ecx\n" -" rep movsb\n" - -" movl 8(%%esp), %%esi\n" /* move in back to %esi, toss from */ -" movl 32(%%esp), %%ebp\n" /* ebp = lcode */ -" jmp .L_while_test\n" - -".L_test_for_end_of_block:\n" -" testb $32, %%al\n" -" jz .L_invalid_literal_length_code\n" -" movl $1, 72(%%esp)\n" -" jmp .L_break_loop_with_status\n" - -".L_invalid_literal_length_code:\n" -" movl $2, 72(%%esp)\n" -" jmp .L_break_loop_with_status\n" - -".L_invalid_distance_code:\n" -" movl $3, 72(%%esp)\n" -" jmp .L_break_loop_with_status\n" - -".L_invalid_distance_too_far:\n" -" movl 8(%%esp), %%esi\n" -" movl $4, 72(%%esp)\n" -" jmp .L_break_loop_with_status\n" - -".L_break_loop:\n" -" movl $0, 72(%%esp)\n" - -".L_break_loop_with_status:\n" -/* put in, out, bits, and hold back into ar and pop esp */ -" movl %%esi, 8(%%esp)\n" /* save in */ -" movl %%edi, 16(%%esp)\n" /* save out */ -" movl %%ebx, 44(%%esp)\n" /* save bits */ -" movl %%edx, 40(%%esp)\n" /* save hold */ -" movl 4(%%esp), %%ebp\n" /* restore esp, ebp */ -" movl (%%esp), %%esp\n" - : - : "m" (ar) - : "memory", "%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi" - ); -#elif defined( _MSC_VER ) && ! defined( _M_AMD64 ) - __asm { - lea eax, ar - mov [eax], esp /* save esp, ebp */ - mov [eax+4], ebp - mov esp, eax - mov esi, [esp+8] /* esi = in */ - mov edi, [esp+16] /* edi = out */ - mov edx, [esp+40] /* edx = hold */ - mov ebx, [esp+44] /* ebx = bits */ - mov ebp, [esp+32] /* ebp = lcode */ - - cld - jmp L_do_loop - -ALIGN 4 -L_while_test: - cmp [esp+24], edi - jbe L_break_loop - cmp [esp+12], esi - jbe L_break_loop - -L_do_loop: - cmp bl, 15 - ja L_get_length_code /* if (15 < bits) */ - - xor eax, eax - lodsw /* al = *(ushort *)in++ */ - mov cl, bl /* cl = bits, needs it for shifting */ - add bl, 16 /* bits += 16 */ - shl eax, cl - or edx, eax /* hold |= *((ushort *)in)++ << bits */ - -L_get_length_code: - mov eax, [esp+56] /* eax = lmask */ - and eax, edx /* eax &= hold */ - mov eax, [ebp+eax*4] /* eax = lcode[hold & lmask] */ - -L_dolen: - mov cl, ah /* cl = this.bits */ - sub bl, ah /* bits -= this.bits */ - shr edx, cl /* hold >>= this.bits */ - - test al, al - jnz L_test_for_length_base /* if (op != 0) 45.7% */ - - shr eax, 16 /* output this.val char */ - stosb - jmp L_while_test - -ALIGN 4 -L_test_for_length_base: - mov ecx, eax /* len = this */ - shr ecx, 16 /* len = this.val */ - mov [esp+64], ecx /* save len */ - mov cl, al - - test al, 16 - jz L_test_for_second_level_length /* if ((op & 16) == 0) 8% */ - and cl, 15 /* op &= 15 */ - jz L_decode_distance /* if (!op) */ - cmp bl, cl - jae L_add_bits_to_len /* if (op <= bits) */ - - mov ch, cl /* stash op in ch, freeing cl */ - xor eax, eax - lodsw /* al = *(ushort *)in++ */ - mov cl, bl /* cl = bits, needs it for shifting */ - add bl, 16 /* bits += 16 */ - shl eax, cl - or edx, eax /* hold |= *((ushort *)in)++ << bits */ - mov cl, ch /* move op back to ecx */ - -L_add_bits_to_len: - sub bl, cl - xor eax, eax - inc eax - shl eax, cl - dec eax - and eax, edx /* eax &= hold */ - shr edx, cl - add [esp+64], eax /* len += hold & mask[op] */ - -L_decode_distance: - cmp bl, 15 - ja L_get_distance_code /* if (15 < bits) */ - - xor eax, eax - lodsw /* al = *(ushort *)in++ */ - mov cl, bl /* cl = bits, needs it for shifting */ - add bl, 16 /* bits += 16 */ - shl eax, cl - or edx, eax /* hold |= *((ushort *)in)++ << bits */ - -L_get_distance_code: - mov eax, [esp+60] /* eax = dmask */ - mov ecx, [esp+36] /* ecx = dcode */ - and eax, edx /* eax &= hold */ - mov eax, [ecx+eax*4]/* eax = dcode[hold & dmask] */ - -L_dodist: - mov ebp, eax /* dist = this */ - shr ebp, 16 /* dist = this.val */ - mov cl, ah - sub bl, ah /* bits -= this.bits */ - shr edx, cl /* hold >>= this.bits */ - mov cl, al /* cl = this.op */ - - test al, 16 /* if ((op & 16) == 0) */ - jz L_test_for_second_level_dist - and cl, 15 /* op &= 15 */ - jz L_check_dist_one - cmp bl, cl - jae L_add_bits_to_dist /* if (op <= bits) 97.6% */ - - mov ch, cl /* stash op in ch, freeing cl */ - xor eax, eax - lodsw /* al = *(ushort *)in++ */ - mov cl, bl /* cl = bits, needs it for shifting */ - add bl, 16 /* bits += 16 */ - shl eax, cl - or edx, eax /* hold |= *((ushort *)in)++ << bits */ - mov cl, ch /* move op back to ecx */ - -L_add_bits_to_dist: - sub bl, cl - xor eax, eax - inc eax - shl eax, cl - dec eax /* (1 << op) - 1 */ - and eax, edx /* eax &= hold */ - shr edx, cl - add ebp, eax /* dist += hold & ((1 << op) - 1) */ - -L_check_window: - mov [esp+8], esi /* save in so from can use it's reg */ - mov eax, edi - sub eax, [esp+20] /* nbytes = out - beg */ - - cmp eax, ebp - jb L_clip_window /* if (dist > nbytes) 4.2% */ - - mov ecx, [esp+64] /* ecx = len */ - mov esi, edi - sub esi, ebp /* from = out - dist */ - - sar ecx, 1 - jnc L_copy_two - - rep movsw - mov al, [esi] - mov [edi], al - inc edi - - mov esi, [esp+8] /* move in back to %esi, toss from */ - mov ebp, [esp+32] /* ebp = lcode */ - jmp L_while_test - -L_copy_two: - rep movsw - mov esi, [esp+8] /* move in back to %esi, toss from */ - mov ebp, [esp+32] /* ebp = lcode */ - jmp L_while_test - -ALIGN 4 -L_check_dist_one: - cmp ebp, 1 /* if dist 1, is a memset */ - jne L_check_window - cmp [esp+20], edi - je L_check_window /* out == beg, if outside window */ - - mov ecx, [esp+64] /* ecx = len */ - mov al, [edi-1] - mov ah, al - - sar ecx, 1 - jnc L_set_two - mov [edi], al /* memset out with from[-1] */ - inc edi - -L_set_two: - rep stosw - mov ebp, [esp+32] /* ebp = lcode */ - jmp L_while_test - -ALIGN 4 -L_test_for_second_level_length: - test al, 64 - jnz L_test_for_end_of_block /* if ((op & 64) != 0) */ - - xor eax, eax - inc eax - shl eax, cl - dec eax - and eax, edx /* eax &= hold */ - add eax, [esp+64] /* eax += len */ - mov eax, [ebp+eax*4] /* eax = lcode[val+(hold&mask[op])]*/ - jmp L_dolen - -ALIGN 4 -L_test_for_second_level_dist: - test al, 64 - jnz L_invalid_distance_code /* if ((op & 64) != 0) */ - - xor eax, eax - inc eax - shl eax, cl - dec eax - and eax, edx /* eax &= hold */ - add eax, ebp /* eax += dist */ - mov ecx, [esp+36] /* ecx = dcode */ - mov eax, [ecx+eax*4] /* eax = dcode[val+(hold&mask[op])]*/ - jmp L_dodist - -ALIGN 4 -L_clip_window: - mov ecx, eax - mov eax, [esp+48] /* eax = wsize */ - neg ecx /* nbytes = -nbytes */ - mov esi, [esp+28] /* from = window */ - - cmp eax, ebp - jb L_invalid_distance_too_far /* if (dist > wsize) */ - - add ecx, ebp /* nbytes = dist - nbytes */ - cmp dword ptr [esp+52], 0 - jne L_wrap_around_window /* if (write != 0) */ - - sub eax, ecx - add esi, eax /* from += wsize - nbytes */ - - mov eax, [esp+64] /* eax = len */ - cmp eax, ecx - jbe L_do_copy /* if (nbytes >= len) */ - - sub eax, ecx /* len -= nbytes */ - rep movsb - mov esi, edi - sub esi, ebp /* from = out - dist */ - jmp L_do_copy - -ALIGN 4 -L_wrap_around_window: - mov eax, [esp+52] /* eax = write */ - cmp ecx, eax - jbe L_contiguous_in_window /* if (write >= nbytes) */ - - add esi, [esp+48] /* from += wsize */ - add esi, eax /* from += write */ - sub esi, ecx /* from -= nbytes */ - sub ecx, eax /* nbytes -= write */ - - mov eax, [esp+64] /* eax = len */ - cmp eax, ecx - jbe L_do_copy /* if (nbytes >= len) */ - - sub eax, ecx /* len -= nbytes */ - rep movsb - mov esi, [esp+28] /* from = window */ - mov ecx, [esp+52] /* nbytes = write */ - cmp eax, ecx - jbe L_do_copy /* if (nbytes >= len) */ - - sub eax, ecx /* len -= nbytes */ - rep movsb - mov esi, edi - sub esi, ebp /* from = out - dist */ - jmp L_do_copy - -ALIGN 4 -L_contiguous_in_window: - add esi, eax - sub esi, ecx /* from += write - nbytes */ - - mov eax, [esp+64] /* eax = len */ - cmp eax, ecx - jbe L_do_copy /* if (nbytes >= len) */ - - sub eax, ecx /* len -= nbytes */ - rep movsb - mov esi, edi - sub esi, ebp /* from = out - dist */ - jmp L_do_copy - -ALIGN 4 -L_do_copy: - mov ecx, eax - rep movsb - - mov esi, [esp+8] /* move in back to %esi, toss from */ - mov ebp, [esp+32] /* ebp = lcode */ - jmp L_while_test - -L_test_for_end_of_block: - test al, 32 - jz L_invalid_literal_length_code - mov dword ptr [esp+72], 1 - jmp L_break_loop_with_status - -L_invalid_literal_length_code: - mov dword ptr [esp+72], 2 - jmp L_break_loop_with_status - -L_invalid_distance_code: - mov dword ptr [esp+72], 3 - jmp L_break_loop_with_status - -L_invalid_distance_too_far: - mov esi, [esp+4] - mov dword ptr [esp+72], 4 - jmp L_break_loop_with_status - -L_break_loop: - mov dword ptr [esp+72], 0 - -L_break_loop_with_status: -/* put in, out, bits, and hold back into ar and pop esp */ - mov [esp+8], esi /* save in */ - mov [esp+16], edi /* save out */ - mov [esp+44], ebx /* save bits */ - mov [esp+40], edx /* save hold */ - mov ebp, [esp+4] /* restore esp, ebp */ - mov esp, [esp] - } -#else -#error "x86 architecture not defined" -#endif - - if (ar.status > 1) { - if (ar.status == 2) - strm->msg = "invalid literal/length code"; - else if (ar.status == 3) - strm->msg = "invalid distance code"; - else - strm->msg = "invalid distance too far back"; - state->mode = BAD; - } - else if ( ar.status == 1 ) { - state->mode = TYPE; - } - - /* return unused bytes (on entry, bits < 8, so in won't go too far back) */ - ar.len = ar.bits >> 3; - ar.in -= ar.len; - ar.bits -= ar.len << 3; - ar.hold &= (1U << ar.bits) - 1; - - /* update state and return */ - strm->next_in = ar.in; - strm->next_out = ar.out; - strm->avail_in = (unsigned)(ar.in < ar.last ? - PAD_AVAIL_IN + (ar.last - ar.in) : - PAD_AVAIL_IN - (ar.in - ar.last)); - strm->avail_out = (unsigned)(ar.out < ar.end ? - PAD_AVAIL_OUT + (ar.end - ar.out) : - PAD_AVAIL_OUT - (ar.out - ar.end)); - state->hold = ar.hold; - state->bits = ar.bits; - return; -} - |