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- #include "zutil.h"
- #include "inftrees.h"
- #include "inflate.h"
- #include "inffast.h"
- void inflate_fast(strm, start)
- z_streamp strm;
- unsigned start;
- {
- struct inflate_state FAR *state;
- struct inffast_ar {
- void *esp;
- void *ebp;
- unsigned char FAR *in;
- unsigned char FAR *last;
- unsigned char FAR *out;
- unsigned char FAR *beg;
- unsigned char FAR *end;
- unsigned char FAR *window;
- code const FAR *lcode;
- code const FAR *dcode;
- unsigned long hold;
- unsigned bits;
- unsigned wsize;
- unsigned write;
- unsigned lmask;
- unsigned dmask;
- unsigned len;
- unsigned dist;
- unsigned status;
- } 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
-
- 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;
-
-
- 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"
- " movq %%rsp, (%%rax)\n"
- " movq %%rax, %%rsp\n"
- " movq 16(%%rsp), %%rsi\n"
- " movq 32(%%rsp), %%rdi\n"
- " movq 24(%%rsp), %%r9\n"
- " movq 48(%%rsp), %%r10\n"
- " movq 64(%%rsp), %%rbp\n"
- " movq 72(%%rsp), %%r11\n"
- " movq 80(%%rsp), %%rdx\n"
- " movl 88(%%rsp), %%ebx\n"
- " movl 100(%%rsp), %%r12d\n"
- " movl 104(%%rsp), %%r13d\n"
-
-
- " cld\n"
- " cmpq %%rdi, %%r10\n"
- " je .L_one_time\n"
- " cmpq %%rsi, %%r9\n"
- " je .L_one_time\n"
- " jmp .L_do_loop\n"
- ".L_one_time:\n"
- " movq %%r12, %%r8\n"
- " cmpb $32, %%bl\n"
- " ja .L_get_length_code_one_time\n"
- " lodsl\n"
- " movb %%bl, %%cl\n"
- " addb $32, %%bl\n"
- " shlq %%cl, %%rax\n"
- " orq %%rax, %%rdx\n"
- " 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"
- " cmpb $32, %%bl\n"
- " ja .L_get_length_code\n"
- " lodsl\n"
- " movb %%bl, %%cl\n"
- " addb $32, %%bl\n"
- " shlq %%cl, %%rax\n"
- " orq %%rax, %%rdx\n"
- ".L_get_length_code:\n"
- " andq %%rdx, %%r8\n"
- " movl (%%rbp,%%r8,4), %%eax\n"
- " movb %%ah, %%cl\n"
- " subb %%ah, %%bl\n"
- " shrq %%cl, %%rdx\n"
- " testb %%al, %%al\n"
- " jnz .L_test_for_length_base\n"
- " movq %%r12, %%r8\n"
- " shrl $16, %%eax\n"
- " stosb\n"
- ".L_get_length_code_one_time:\n"
- " andq %%rdx, %%r8\n"
- " movl (%%rbp,%%r8,4), %%eax\n"
- ".L_dolen:\n"
- " movb %%ah, %%cl\n"
- " subb %%ah, %%bl\n"
- " shrq %%cl, %%rdx\n"
- " testb %%al, %%al\n"
- " jnz .L_test_for_length_base\n"
- " shrl $16, %%eax\n"
- " stosb\n"
- " jmp .L_while_test\n"
- ".align 32,0x90\n"
- ".L_test_for_length_base:\n"
- " movl %%eax, %%r14d\n"
- " shrl $16, %%r14d\n"
- " movb %%al, %%cl\n"
- " testb $16, %%al\n"
- " jz .L_test_for_second_level_length\n"
- " andb $15, %%cl\n"
- " jz .L_decode_distance\n"
- ".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"
- " shrq %%cl, %%rdx\n"
- " addl %%eax, %%r14d\n"
- ".L_decode_distance:\n"
- " movq %%r13, %%r8\n"
- " cmpb $32, %%bl\n"
- " ja .L_get_distance_code\n"
- " lodsl\n"
- " movb %%bl, %%cl\n"
- " addb $32, %%bl\n"
- " shlq %%cl, %%rax\n"
- " orq %%rax, %%rdx\n"
- ".L_get_distance_code:\n"
- " andq %%rdx, %%r8\n"
- " movl (%%r11,%%r8,4), %%eax\n"
- ".L_dodist:\n"
- " movl %%eax, %%r15d\n"
- " shrl $16, %%r15d\n"
- " movb %%ah, %%cl\n"
- " subb %%ah, %%bl\n"
- " shrq %%cl, %%rdx\n"
- " movb %%al, %%cl\n"
- " testb $16, %%al\n"
- " jz .L_test_for_second_level_dist\n"
- " andb $15, %%cl\n"
- " 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"
- " andl %%edx, %%eax\n"
- " shrq %%cl, %%rdx\n"
- " addl %%eax, %%r15d\n"
- ".L_check_window:\n"
- " movq %%rsi, %%r8\n"
- " movq %%rdi, %%rax\n"
- " subq 40(%%rsp), %%rax\n"
- " cmpl %%r15d, %%eax\n"
- " jb .L_clip_window\n"
- " movl %%r14d, %%ecx\n"
- " movq %%rdi, %%rsi\n"
- " subq %%r15, %%rsi\n"
- " sarl %%ecx\n"
- " jnc .L_copy_two\n"
- " rep movsw\n"
- " movb (%%rsi), %%al\n"
- " movb %%al, (%%rdi)\n"
- " incq %%rdi\n"
- " movq %%r8, %%rsi\n"
- " jmp .L_while_test\n"
- ".L_copy_two:\n"
- " rep movsw\n"
- " movq %%r8, %%rsi\n"
- " jmp .L_while_test\n"
- ".align 32,0x90\n"
- ".L_check_dist_one:\n"
- " cmpl $1, %%r15d\n"
- " jne .L_check_window\n"
- " cmpq %%rdi, 40(%%rsp)\n"
- " je .L_check_window\n"
- " movl %%r14d, %%ecx\n"
- " 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"
- " xorl %%eax, %%eax\n"
- " incl %%eax\n"
- " shll %%cl, %%eax\n"
- " decl %%eax\n"
- " andl %%edx, %%eax\n"
- " addl %%r14d, %%eax\n"
- " movl (%%rbp,%%rax,4), %%eax\n"
- " 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"
- " xorl %%eax, %%eax\n"
- " incl %%eax\n"
- " shll %%cl, %%eax\n"
- " decl %%eax\n"
- " andl %%edx, %%eax\n"
- " addl %%r15d, %%eax\n"
- " movl (%%r11,%%rax,4), %%eax\n"
- " jmp .L_dodist\n"
- ".align 32,0x90\n"
- ".L_clip_window:\n"
- " movl %%eax, %%ecx\n"
- " movl 92(%%rsp), %%eax\n"
- " negl %%ecx\n"
- " cmpl %%r15d, %%eax\n"
- " jb .L_invalid_distance_too_far\n"
- " addl %%r15d, %%ecx\n"
- " cmpl $0, 96(%%rsp)\n"
- " jne .L_wrap_around_window\n"
- " movq 56(%%rsp), %%rsi\n"
- " subl %%ecx, %%eax\n"
- " addq %%rax, %%rsi\n"
- " movl %%r14d, %%eax\n"
- " cmpl %%ecx, %%r14d\n"
- " jbe .L_do_copy\n"
- " subl %%ecx, %%eax\n"
- " rep movsb\n"
- " movq %%rdi, %%rsi\n"
- " subq %%r15, %%rsi\n"
- " jmp .L_do_copy\n"
- ".align 32,0x90\n"
- ".L_wrap_around_window:\n"
- " movl 96(%%rsp), %%eax\n"
- " cmpl %%eax, %%ecx\n"
- " jbe .L_contiguous_in_window\n"
- " movl 92(%%rsp), %%esi\n"
- " addq 56(%%rsp), %%rsi\n"
- " addq %%rax, %%rsi\n"
- " subq %%rcx, %%rsi\n"
- " subl %%eax, %%ecx\n"
- " movl %%r14d, %%eax\n"
- " cmpl %%ecx, %%eax\n"
- " jbe .L_do_copy\n"
- " subl %%ecx, %%eax\n"
- " rep movsb\n"
- " movq 56(%%rsp), %%rsi\n"
- " movl 96(%%rsp), %%ecx\n"
- " cmpl %%ecx, %%eax\n"
- " jbe .L_do_copy\n"
- " subl %%ecx, %%eax\n"
- " rep movsb\n"
- " movq %%rdi, %%rsi\n"
- " subq %%r15, %%rsi\n"
- " jmp .L_do_copy\n"
- ".align 32,0x90\n"
- ".L_contiguous_in_window:\n"
- " movq 56(%%rsp), %%rsi\n"
- " addq %%rax, %%rsi\n"
- " subq %%rcx, %%rsi\n"
- " movl %%r14d, %%eax\n"
- " cmpl %%ecx, %%eax\n"
- " jbe .L_do_copy\n"
- " subl %%ecx, %%eax\n"
- " rep movsb\n"
- " movq %%rdi, %%rsi\n"
- " subq %%r15, %%rsi\n"
- " jmp .L_do_copy\n"
- ".align 32,0x90\n"
- ".L_do_copy:\n"
- " movl %%eax, %%ecx\n"
- " rep movsb\n"
- " movq %%r8, %%rsi\n"
- " 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"
- " movq %%rsi, 16(%%rsp)\n"
- " movq %%rdi, 32(%%rsp)\n"
- " movl %%ebx, 88(%%rsp)\n"
- " movq %%rdx, 80(%%rsp)\n"
- " movq (%%rsp), %%rax\n"
- " 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"
- " movl %%ebp, 4(%%eax)\n"
- " movl %%eax, %%esp\n"
- " movl 8(%%esp), %%esi\n"
- " movl 16(%%esp), %%edi\n"
- " movl 40(%%esp), %%edx\n"
- " movl 44(%%esp), %%ebx\n"
- " movl 32(%%esp), %%ebp\n"
- " cld\n"
- " jmp .L_do_loop\n"
- ".align 32,0x90\n"
- ".L_while_test:\n"
- " cmpl %%edi, 24(%%esp)\n"
- " jbe .L_break_loop\n"
- " cmpl %%esi, 12(%%esp)\n"
- " jbe .L_break_loop\n"
- ".L_do_loop:\n"
- " cmpb $15, %%bl\n"
- " ja .L_get_length_code\n"
- " xorl %%eax, %%eax\n"
- " lodsw\n"
- " movb %%bl, %%cl\n"
- " addb $16, %%bl\n"
- " shll %%cl, %%eax\n"
- " orl %%eax, %%edx\n"
- ".L_get_length_code:\n"
- " movl 56(%%esp), %%eax\n"
- " andl %%edx, %%eax\n"
- " movl (%%ebp,%%eax,4), %%eax\n"
- ".L_dolen:\n"
- " movb %%ah, %%cl\n"
- " subb %%ah, %%bl\n"
- " shrl %%cl, %%edx\n"
- " testb %%al, %%al\n"
- " jnz .L_test_for_length_base\n"
- " shrl $16, %%eax\n"
- " stosb\n"
- " jmp .L_while_test\n"
- ".align 32,0x90\n"
- ".L_test_for_length_base:\n"
- " movl %%eax, %%ecx\n"
- " shrl $16, %%ecx\n"
- " movl %%ecx, 64(%%esp)\n"
- " movb %%al, %%cl\n"
- " testb $16, %%al\n"
- " jz .L_test_for_second_level_length\n"
- " andb $15, %%cl\n"
- " jz .L_decode_distance\n"
- " cmpb %%cl, %%bl\n"
- " jae .L_add_bits_to_len\n"
- " movb %%cl, %%ch\n"
- " xorl %%eax, %%eax\n"
- " lodsw\n"
- " movb %%bl, %%cl\n"
- " addb $16, %%bl\n"
- " shll %%cl, %%eax\n"
- " orl %%eax, %%edx\n"
- " movb %%ch, %%cl\n"
- ".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"
- " shrl %%cl, %%edx\n"
- " addl %%eax, 64(%%esp)\n"
- ".L_decode_distance:\n"
- " cmpb $15, %%bl\n"
- " ja .L_get_distance_code\n"
- " xorl %%eax, %%eax\n"
- " lodsw\n"
- " movb %%bl, %%cl\n"
- " addb $16, %%bl\n"
- " shll %%cl, %%eax\n"
- " orl %%eax, %%edx\n"
- ".L_get_distance_code:\n"
- " movl 60(%%esp), %%eax\n"
- " movl 36(%%esp), %%ecx\n"
- " andl %%edx, %%eax\n"
- " movl (%%ecx,%%eax,4), %%eax\n"
- ".L_dodist:\n"
- " movl %%eax, %%ebp\n"
- " shrl $16, %%ebp\n"
- " movb %%ah, %%cl\n"
- " subb %%ah, %%bl\n"
- " shrl %%cl, %%edx\n"
- " movb %%al, %%cl\n"
- " testb $16, %%al\n"
- " jz .L_test_for_second_level_dist\n"
- " andb $15, %%cl\n"
- " jz .L_check_dist_one\n"
- " cmpb %%cl, %%bl\n"
- " jae .L_add_bits_to_dist\n"
- " movb %%cl, %%ch\n"
- " xorl %%eax, %%eax\n"
- " lodsw\n"
- " movb %%bl, %%cl\n"
- " addb $16, %%bl\n"
- " shll %%cl, %%eax\n"
- " orl %%eax, %%edx\n"
- " movb %%ch, %%cl\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"
- " andl %%edx, %%eax\n"
- " shrl %%cl, %%edx\n"
- " addl %%eax, %%ebp\n"
- ".L_check_window:\n"
- " movl %%esi, 8(%%esp)\n"
- " movl %%edi, %%eax\n"
- " subl 20(%%esp), %%eax\n"
- " cmpl %%ebp, %%eax\n"
- " jb .L_clip_window\n"
- " movl 64(%%esp), %%ecx\n"
- " movl %%edi, %%esi\n"
- " subl %%ebp, %%esi\n"
- " sarl %%ecx\n"
- " jnc .L_copy_two\n"
- " rep movsw\n"
- " movb (%%esi), %%al\n"
- " movb %%al, (%%edi)\n"
- " incl %%edi\n"
- " movl 8(%%esp), %%esi\n"
- " movl 32(%%esp), %%ebp\n"
- " jmp .L_while_test\n"
- ".L_copy_two:\n"
- " rep movsw\n"
- " movl 8(%%esp), %%esi\n"
- " movl 32(%%esp), %%ebp\n"
- " jmp .L_while_test\n"
- ".align 32,0x90\n"
- ".L_check_dist_one:\n"
- " cmpl $1, %%ebp\n"
- " jne .L_check_window\n"
- " cmpl %%edi, 20(%%esp)\n"
- " je .L_check_window\n"
- " movl 64(%%esp), %%ecx\n"
- " 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"
- " 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"
- " xorl %%eax, %%eax\n"
- " incl %%eax\n"
- " shll %%cl, %%eax\n"
- " decl %%eax\n"
- " andl %%edx, %%eax\n"
- " addl 64(%%esp), %%eax\n"
- " movl (%%ebp,%%eax,4), %%eax\n"
- " 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"
- " xorl %%eax, %%eax\n"
- " incl %%eax\n"
- " shll %%cl, %%eax\n"
- " decl %%eax\n"
- " andl %%edx, %%eax\n"
- " addl %%ebp, %%eax\n"
- " movl 36(%%esp), %%ecx\n"
- " movl (%%ecx,%%eax,4), %%eax\n"
- " jmp .L_dodist\n"
- ".align 32,0x90\n"
- ".L_clip_window:\n"
- " movl %%eax, %%ecx\n"
- " movl 48(%%esp), %%eax\n"
- " negl %%ecx\n"
- " movl 28(%%esp), %%esi\n"
- " cmpl %%ebp, %%eax\n"
- " jb .L_invalid_distance_too_far\n"
- " addl %%ebp, %%ecx\n"
- " cmpl $0, 52(%%esp)\n"
- " jne .L_wrap_around_window\n"
- " subl %%ecx, %%eax\n"
- " addl %%eax, %%esi\n"
- " movl 64(%%esp), %%eax\n"
- " cmpl %%ecx, %%eax\n"
- " jbe .L_do_copy\n"
- " subl %%ecx, %%eax\n"
- " rep movsb\n"
- " movl %%edi, %%esi\n"
- " subl %%ebp, %%esi\n"
- " jmp .L_do_copy\n"
- ".align 32,0x90\n"
- ".L_wrap_around_window:\n"
- " movl 52(%%esp), %%eax\n"
- " cmpl %%eax, %%ecx\n"
- " jbe .L_contiguous_in_window\n"
- " addl 48(%%esp), %%esi\n"
- " addl %%eax, %%esi\n"
- " subl %%ecx, %%esi\n"
- " subl %%eax, %%ecx\n"
- " movl 64(%%esp), %%eax\n"
- " cmpl %%ecx, %%eax\n"
- " jbe .L_do_copy\n"
- " subl %%ecx, %%eax\n"
- " rep movsb\n"
- " movl 28(%%esp), %%esi\n"
- " movl 52(%%esp), %%ecx\n"
- " cmpl %%ecx, %%eax\n"
- " jbe .L_do_copy\n"
- " subl %%ecx, %%eax\n"
- " rep movsb\n"
- " movl %%edi, %%esi\n"
- " subl %%ebp, %%esi\n"
- " jmp .L_do_copy\n"
- ".align 32,0x90\n"
- ".L_contiguous_in_window:\n"
- " addl %%eax, %%esi\n"
- " subl %%ecx, %%esi\n"
- " movl 64(%%esp), %%eax\n"
- " cmpl %%ecx, %%eax\n"
- " jbe .L_do_copy\n"
- " subl %%ecx, %%eax\n"
- " rep movsb\n"
- " movl %%edi, %%esi\n"
- " subl %%ebp, %%esi\n"
- " jmp .L_do_copy\n"
- ".align 32,0x90\n"
- ".L_do_copy:\n"
- " movl %%eax, %%ecx\n"
- " rep movsb\n"
- " movl 8(%%esp), %%esi\n"
- " movl 32(%%esp), %%ebp\n"
- " 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"
- " movl %%esi, 8(%%esp)\n"
- " movl %%edi, 16(%%esp)\n"
- " movl %%ebx, 44(%%esp)\n"
- " movl %%edx, 40(%%esp)\n"
- " movl 4(%%esp), %%ebp\n"
- " 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
- mov [eax+4], ebp
- mov esp, eax
- mov esi, [esp+8]
- mov edi, [esp+16]
- mov edx, [esp+40]
- mov ebx, [esp+44]
- mov ebp, [esp+32]
- 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
- xor eax, eax
- lodsw
- mov cl, bl
- add bl, 16
- shl eax, cl
- or edx, eax
- L_get_length_code:
- mov eax, [esp+56]
- and eax, edx
- mov eax, [ebp+eax*4]
- L_dolen:
- mov cl, ah
- sub bl, ah
- shr edx, cl
- test al, al
- jnz L_test_for_length_base
- shr eax, 16
- stosb
- jmp L_while_test
- ALIGN 4
- L_test_for_length_base:
- mov ecx, eax
- shr ecx, 16
- mov [esp+64], ecx
- mov cl, al
- test al, 16
- jz L_test_for_second_level_length
- and cl, 15
- jz L_decode_distance
- cmp bl, cl
- jae L_add_bits_to_len
- mov ch, cl
- xor eax, eax
- lodsw
- mov cl, bl
- add bl, 16
- shl eax, cl
- or edx, eax
- mov cl, ch
- L_add_bits_to_len:
- sub bl, cl
- xor eax, eax
- inc eax
- shl eax, cl
- dec eax
- and eax, edx
- shr edx, cl
- add [esp+64], eax
- L_decode_distance:
- cmp bl, 15
- ja L_get_distance_code
- xor eax, eax
- lodsw
- mov cl, bl
- add bl, 16
- shl eax, cl
- or edx, eax
- L_get_distance_code:
- mov eax, [esp+60]
- mov ecx, [esp+36]
- and eax, edx
- mov eax, [ecx+eax*4]
- L_dodist:
- mov ebp, eax
- shr ebp, 16
- mov cl, ah
- sub bl, ah
- shr edx, cl
- mov cl, al
- test al, 16
- jz L_test_for_second_level_dist
- and cl, 15
- jz L_check_dist_one
- cmp bl, cl
- jae L_add_bits_to_dist
- mov ch, cl
- xor eax, eax
- lodsw
- mov cl, bl
- add bl, 16
- shl eax, cl
- or edx, eax
- mov cl, ch
- L_add_bits_to_dist:
- sub bl, cl
- xor eax, eax
- inc eax
- shl eax, cl
- dec eax
- and eax, edx
- shr edx, cl
- add ebp, eax
- L_check_window:
- mov [esp+8], esi
- mov eax, edi
- sub eax, [esp+20]
- cmp eax, ebp
- jb L_clip_window
- mov ecx, [esp+64]
- mov esi, edi
- sub esi, ebp
- sar ecx, 1
- jnc L_copy_two
- rep movsw
- mov al, [esi]
- mov [edi], al
- inc edi
- mov esi, [esp+8]
- mov ebp, [esp+32]
- jmp L_while_test
- L_copy_two:
- rep movsw
- mov esi, [esp+8]
- mov ebp, [esp+32]
- jmp L_while_test
- ALIGN 4
- L_check_dist_one:
- cmp ebp, 1
- jne L_check_window
- cmp [esp+20], edi
- je L_check_window
- mov ecx, [esp+64]
- mov al, [edi-1]
- mov ah, al
- sar ecx, 1
- jnc L_set_two
- mov [edi], al
- inc edi
- L_set_two:
- rep stosw
- mov ebp, [esp+32]
- jmp L_while_test
- ALIGN 4
- L_test_for_second_level_length:
- test al, 64
- jnz L_test_for_end_of_block
- xor eax, eax
- inc eax
- shl eax, cl
- dec eax
- and eax, edx
- add eax, [esp+64]
- mov eax, [ebp+eax*4]
- jmp L_dolen
- ALIGN 4
- L_test_for_second_level_dist:
- test al, 64
- jnz L_invalid_distance_code
- xor eax, eax
- inc eax
- shl eax, cl
- dec eax
- and eax, edx
- add eax, ebp
- mov ecx, [esp+36]
- mov eax, [ecx+eax*4]
- jmp L_dodist
- ALIGN 4
- L_clip_window:
- mov ecx, eax
- mov eax, [esp+48]
- neg ecx
- mov esi, [esp+28]
- cmp eax, ebp
- jb L_invalid_distance_too_far
- add ecx, ebp
- cmp dword ptr [esp+52], 0
- jne L_wrap_around_window
- sub eax, ecx
- add esi, eax
- mov eax, [esp+64]
- cmp eax, ecx
- jbe L_do_copy
- sub eax, ecx
- rep movsb
- mov esi, edi
- sub esi, ebp
- jmp L_do_copy
- ALIGN 4
- L_wrap_around_window:
- mov eax, [esp+52]
- cmp ecx, eax
- jbe L_contiguous_in_window
- add esi, [esp+48]
- add esi, eax
- sub esi, ecx
- sub ecx, eax
- mov eax, [esp+64]
- cmp eax, ecx
- jbe L_do_copy
- sub eax, ecx
- rep movsb
- mov esi, [esp+28]
- mov ecx, [esp+52]
- cmp eax, ecx
- jbe L_do_copy
- sub eax, ecx
- rep movsb
- mov esi, edi
- sub esi, ebp
- jmp L_do_copy
- ALIGN 4
- L_contiguous_in_window:
- add esi, eax
- sub esi, ecx
- mov eax, [esp+64]
- cmp eax, ecx
- jbe L_do_copy
- sub eax, ecx
- rep movsb
- mov esi, edi
- sub esi, ebp
- jmp L_do_copy
- ALIGN 4
- L_do_copy:
- mov ecx, eax
- rep movsb
- mov esi, [esp+8]
- mov ebp, [esp+32]
- 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:
- mov [esp+8], esi
- mov [esp+16], edi
- mov [esp+44], ebx
- mov [esp+40], edx
- mov ebp, [esp+4]
- 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;
- }
-
- ar.len = ar.bits >> 3;
- ar.in -= ar.len;
- ar.bits -= ar.len << 3;
- ar.hold &= (1U << ar.bits) - 1;
-
- 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;
- }
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