-/*\r
- * inffast.S is a hand tuned assembler version of:\r
- *\r
- * inffast.c -- fast decoding\r
- * Copyright (C) 1995-2003 Mark Adler\r
- * For conditions of distribution and use, see copyright notice in zlib.h \r
- *\r
- * Copyright (C) 2003 Chris Anderson <christop@charm.net>\r
- * Please use the copyright conditions above.\r
- * \r
- * This version (Jan-23-2003) of inflate_fast was coded and tested under\r
- * GNU/Linux on a pentium 3, using the gcc-3.2 compiler distribution. On that\r
- * machine, I found that gzip style archives decompressed about 20% faster than\r
- * the gcc-3.2 -O3 -fomit-frame-pointer compiled version. Your results will\r
- * depend on how large of a buffer is used for z_stream.next_in & next_out\r
- * (8K-32K worked best for my 256K cpu cache) and how much overhead there is in\r
- * stream processing I/O and crc32/addler32. In my case, this routine used\r
- * 70% of the cpu time and crc32 used 20%.\r
- *\r
- * I am confident that this version will work in the general case, but I have\r
- * not tested a wide variety of datasets or a wide variety of platforms.\r
- *\r
- * Jan-24-2003 -- Added -DUSE_MMX define for slightly faster inflating.\r
- * It should be a runtime flag instead of compile time flag...\r
- */\r
-\r
-.file "inffast.S"\r
-\r
-.globl inflate_fast\r
-\r
-.text\r
-.align 4,0\r
-.L_invalid_literal_length_code_msg:\r
-.string "invalid literal/length code"\r
-\r
-.align 4,0\r
-.L_invalid_distance_code_msg:\r
-.string "invalid distance code"\r
-\r
-.align 4,0\r
-.L_invalid_distance_too_far_msg:\r
-.string "invalid distance too far back"\r
-\r
-#if defined( USE_MMX )\r
-.align 4,0\r
-.L_mask: /* mask[N] = ( 1 << N ) - 1 */\r
-.long 0\r
-.long 1\r
-.long 3\r
-.long 7\r
-.long 15\r
-.long 31\r
-.long 63\r
-.long 127\r
-.long 255\r
-.long 511\r
-.long 1023\r
-.long 2047\r
-.long 4095\r
-.long 8191\r
-.long 16383\r
-.long 32767\r
-.long 65535\r
-.long 131071\r
-.long 262143\r
-.long 524287\r
-.long 1048575\r
-.long 2097151\r
-.long 4194303\r
-.long 8388607\r
-.long 16777215\r
-.long 33554431\r
-.long 67108863\r
-.long 134217727\r
-.long 268435455\r
-.long 536870911\r
-.long 1073741823\r
-.long 2147483647\r
-.long 4294967295\r
-#endif\r
-\r
-.text\r
-\r
-/*\r
- * struct z_stream offsets, in zlib.h\r
- */\r
-#define next_in_strm 0 /* strm->next_in */\r
-#define avail_in_strm 4 /* strm->avail_in */\r
-#define next_out_strm 12 /* strm->next_out */\r
-#define avail_out_strm 16 /* strm->avail_out */\r
-#define msg_strm 24 /* strm->msg */\r
-#define state_strm 28 /* strm->state */\r
-\r
-/*\r
- * struct inflate_state offsets, in inflate.h\r
- */\r
-#define mode_state 0 /* state->mode */\r
-#define wsize_state 32 /* state->wsize */\r
-#define write_state 36 /* state->write */\r
-#define window_state 40 /* state->window */\r
-#define hold_state 44 /* state->hold */\r
-#define bits_state 48 /* state->bits */\r
-#define lencode_state 64 /* state->lencode */\r
-#define distcode_state 68 /* state->distcode */\r
-#define lenbits_state 72 /* state->lenbits */\r
-#define distbits_state 76 /* state->distbits */\r
-\r
-/*\r
- * inflate_fast's activation record\r
- */\r
-#define local_var_size 56 /* how much local space for vars */\r
-#define strm_sp 80 /* first arg: z_stream * (local_var_size + 24) */\r
-#define start_sp 84 /* second arg: unsigned int (local_var_size + 28) */\r
-\r
-/*\r
- * offsets for local vars on stack\r
- */\r
-#define out 52 /* unsigned char* */\r
-#define window 48 /* unsigned char* */\r
-#define wsize 44 /* unsigned int */\r
-#define write 40 /* unsigned int */\r
-#define in 36 /* unsigned char* */\r
-#define beg 32 /* unsigned char* */\r
-#define dist 28 /* unsigned int */\r
-#define len 24 /* unsigned int */\r
-#define last 20 /* unsigned char* */\r
-#define end 16 /* unsigned char* */\r
-#define dcode 12 /* code* */\r
-#define lcode 8 /* code* */\r
-#define dmask 4 /* unsigned int */\r
-#define lmask 0 /* unsigned int */\r
-\r
-/*\r
- * typedef enum inflate_mode consts, in inflate.h\r
- */\r
-#ifndef NO_GUNZIP\r
-#define GUNZIP\r
-#endif\r
-\r
-#ifdef GUNZIP\r
-#define INFLATE_MODE_TYPE 11 /* state->mode flags enum-ed in inflate.h */\r
-#define INFLATE_MODE_BAD 26\r
-#else\r
-#define INFLATE_MODE_TYPE 3\r
-#define INFLATE_MODE_BAD 17\r
-#endif\r
-\r
-\r
-.align 16,0x90\r
-inflate_fast:\r
- pushl %edi\r
- pushl %esi\r
- pushl %ebp\r
- pushl %ebx\r
- pushf /* save eflags (strm_sp, state_sp assumes this is 32 bits) */\r
- subl $local_var_size, %esp\r
- cld\r
-#if defined( USE_MMX )\r
- emms\r
-#endif\r
-\r
-#define strm_r %esi\r
-#define state_r %edi\r
-\r
- movl strm_sp(%esp), strm_r\r
- movl state_strm(strm_r), state_r\r
-\r
- /* in = strm->next_in;\r
- * out = strm->next_out;\r
- * last = in + strm->avail_in - 5;\r
- * beg = out - (start - strm->avail_out);\r
- * end = out + (strm->avail_out - 257);\r
- */\r
- movl next_in_strm(strm_r), %eax\r
- movl next_out_strm(strm_r), %ebx\r
- movl avail_in_strm(strm_r), %edx\r
- movl avail_out_strm(strm_r), %ecx\r
- movl start_sp(%esp), %ebp\r
-\r
- addl %eax, %edx /* avail_in += next_in */\r
- subl $5, %edx /* avail_in -= 5 */\r
-\r
- subl %ecx, %ebp /* start -= avail_out */\r
- negl %ebp /* start = -start */\r
- addl %ebx, %ebp /* start += next_out */\r
-\r
- subl $257, %ecx /* avail_out -= 257 */\r
- addl %ebx, %ecx /* avail_out += out */\r
-\r
- movl %eax, in(%esp)\r
- movl %ebx, out(%esp)\r
- movl %edx, last(%esp)\r
- movl %ebp, beg(%esp)\r
- movl %ecx, end(%esp)\r
-\r
- /* wsize = state->wsize;\r
- * write = state->write;\r
- * window = state->window;\r
- * hold = state->hold;\r
- * bits = state->bits;\r
- * lcode = state->lencode;\r
- * dcode = state->distcode;\r
- * lmask = ( 1 << state->lenbits ) - 1;\r
- * dmask = ( 1 << state->distbits ) - 1;\r
- */\r
-\r
- movl lencode_state(state_r), %eax\r
- movl distcode_state(state_r), %ecx\r
-\r
- movl %eax, lcode(%esp)\r
- movl %ecx, dcode(%esp)\r
-\r
- movl $1, %eax\r
- movl lenbits_state(state_r), %ecx\r
- shll %cl, %eax\r
- decl %eax\r
- movl %eax, lmask(%esp)\r
-\r
- movl $1, %eax\r
- movl distbits_state(state_r), %ecx\r
- shll %cl, %eax\r
- decl %eax\r
- movl %eax, dmask(%esp)\r
-\r
- movl wsize_state(state_r), %eax\r
- movl write_state(state_r), %ecx\r
- movl window_state(state_r), %edx\r
-\r
- movl %eax, wsize(%esp)\r
- movl %ecx, write(%esp)\r
- movl %edx, window(%esp)\r
-\r
-#if ! defined( USE_MMX )\r
-\r
-#define hold_r %ebp\r
-#define bits_r %bl\r
-#define bitslong_r %ebx\r
-\r
- movl hold_state(state_r), hold_r\r
- movl bits_state(state_r), bitslong_r\r
-\r
-#else /* USE_MMX */\r
-\r
-#define hold_mm %mm0\r
-#define bits_r %ebp\r
-#define bitslong_r %ebp\r
-\r
- movl hold_state(state_r), %ebx\r
- movl bits_state(state_r), bitslong_r\r
-\r
-#endif\r
-\r
-#undef strm_r\r
-#undef state_r\r
-#define in_r %esi\r
-#define from_r %esi\r
-#define out_r %edi\r
-\r
- movl in(%esp), in_r\r
-\r
-#if ! defined ( USE_MMX )\r
-\r
- /* align in_r on word boundary */\r
- testl $1, in_r\r
- jz .L_is_aligned\r
- xorl %eax, %eax\r
- movb (in_r), %al\r
- incl in_r\r
- movb bits_r, %cl\r
- addb $8, bits_r\r
- shll %cl, %eax\r
- orl %eax, hold_r\r
-\r
-#else\r
- /* align in_r on long boundary */\r
-.L_align_long:\r
- testl $3, in_r\r
- jz .L_is_aligned\r
- xorl %eax, %eax\r
- movb (in_r), %al\r
- incl in_r\r
- movl bits_r, %ecx\r
- addl $8, bits_r\r
- shll %cl, %eax\r
- orl %eax, %ebx\r
- jmp .L_align_long\r
-\r
-#endif\r
-\r
-.L_is_aligned:\r
- movl out(%esp), out_r\r
-\r
-#if defined ( USE_MMX )\r
-\r
-#define used_mm %mm1\r
-#define dmask2_mm %mm2\r
-#define lmask2_mm %mm3\r
-#define lmask_mm %mm4\r
-#define dmask_mm %mm5\r
-#define tmp_mm %mm6\r
-\r
- movl out(%esp), out_r\r
- movd lmask(%esp), lmask_mm \r
- movq lmask_mm, lmask2_mm\r
- movd dmask(%esp), dmask_mm\r
- movq dmask_mm, dmask2_mm\r
- movd %ebx, hold_mm\r
- pxor used_mm, used_mm\r
- movl lcode(%esp), %ebx /* ebx = lcode */\r
-#endif\r
-\r
- jmp .L_do_loop\r
-\r
-.align 16,0x90\r
-\r
-#if ! defined ( USE_MMX )\r
-\r
-.L_do_loop:\r
- /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out\r
- *\r
- * do { \r
- * if (bits < 15) {\r
- * hold |= *((unsigned short *)in)++ << bits;\r
- * bits += 16\r
- * }\r
- * this = lcode[hold & lmask]\r
- */\r
- cmpb $15, bits_r\r
- ja .L_get_length_code /* if (15 < bits) */\r
-\r
- xorl %eax, %eax\r
- lodsw /* al = *(ushort *)in++ */\r
- movb bits_r, %cl /* cl = bits, needs it for shifting */\r
- addb $16, bits_r /* bits += 16 */\r
- shll %cl, %eax\r
- orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */\r
-\r
-.L_get_length_code:\r
- movl lmask(%esp), %edx /* edx = lmask */\r
- movl lcode(%esp), %ecx /* ecx = lcode */\r
- andl hold_r, %edx /* edx &= hold */\r
- movl (%ecx,%edx,4), %eax /* eax = lcode[hold & lmask] */\r
-\r
-#else /* USE_MMX */\r
-\r
-.L_do_loop:\r
- psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
-\r
- cmpl $32, bits_r\r
- ja .L_get_length_code /* if (32 < bits) */\r
-\r
- movd bits_r, tmp_mm\r
- movd (in_r), %mm7\r
- addl $4, in_r\r
- psllq tmp_mm, %mm7\r
- addl $32, bits_r\r
- por %mm7, hold_mm /* hold_mm |= *((uint *)in)++ << bits */\r
-\r
-.L_get_length_code:\r
- pand hold_mm, lmask_mm\r
- movd lmask_mm, %eax\r
- movq lmask2_mm, lmask_mm\r
- movl (%ebx,%eax,4), %eax /* eax = lcode[hold & lmask] */\r
-\r
-#endif\r
-\r
-#if ! defined( USE_MMX )\r
-\r
-.L_dolen:\r
- /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out\r
- *\r
- * dolen:\r
- * bits -= this.bits;\r
- * hold >>= this.bits\r
- */\r
- movb %ah, %cl /* cl = this.bits */\r
- subb %ah, bits_r /* bits -= this.bits */\r
- shrl %cl, hold_r /* hold >>= this.bits */\r
-\r
- /* check if op is a literal\r
- * if (op == 0) {\r
- * PUP(out) = this.val;\r
- * }\r
- */\r
- testb %al, %al\r
- jnz .L_test_for_length_base /* if (op != 0) 45.7% */\r
-\r
- shrl $16, %eax /* output this.val char */\r
- stosb\r
-\r
-#else /* USE_MMX */\r
-\r
-#define len_r %edx\r
-\r
-.L_dolen:\r
- movzbl %ah, %ecx /* ecx = this.bits */\r
- movl %eax, len_r /* len = this */\r
- shrl $16, len_r /* len = this.val */\r
- movd %ecx, used_mm\r
- subl %ecx, bits_r /* bits -= this.bits */\r
-\r
- testb %al, %al\r
- jnz .L_test_for_length_base /* if (op != 0) 45.7% */\r
-\r
- movb %dl, (out_r)\r
- incl out_r\r
-\r
-#endif\r
-\r
-.L_while_test:\r
- /* while (in < last && out < end)\r
- */\r
- cmpl out_r, end(%esp)\r
- jbe .L_break_loop /* if (out >= end) */\r
-\r
- cmpl in_r, last(%esp)\r
- ja .L_do_loop /* if (in < last) */\r
- jmp .L_break_loop\r
-\r
-#if ! defined( USE_MMX )\r
-\r
-.L_test_for_length_base:\r
- /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = len\r
- *\r
- * else if (op & 16) {\r
- * len = this.val\r
- * op &= 15\r
- * if (op) {\r
- * if (op > bits) {\r
- * hold |= *((unsigned short *)in)++ << bits;\r
- * bits += 16\r
- * }\r
- * len += hold & mask[op];\r
- * bits -= op;\r
- * hold >>= op;\r
- * }\r
- */\r
-#define len_r %edx\r
- movl %eax, len_r /* len = this */\r
- shrl $16, len_r /* len = this.val */\r
- movb %al, %cl\r
-\r
- testb $16, %al\r
- jz .L_test_for_second_level_length /* if ((op & 16) == 0) 8% */\r
- andb $15, %cl /* op &= 15 */\r
- jz .L_save_len /* if (!op) */\r
- cmpb %cl, bits_r\r
- jae .L_add_bits_to_len /* if (op <= bits) */\r
-\r
- movb %cl, %ch /* stash op in ch, freeing cl */\r
- xorl %eax, %eax\r
- lodsw /* al = *(ushort *)in++ */\r
- movb bits_r, %cl /* cl = bits, needs it for shifting */\r
- addb $16, bits_r /* bits += 16 */\r
- shll %cl, %eax\r
- orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */\r
- movb %ch, %cl /* move op back to ecx */\r
-\r
-.L_add_bits_to_len:\r
- movl $1, %eax\r
- shll %cl, %eax\r
- decl %eax\r
- subb %cl, bits_r\r
- andl hold_r, %eax /* eax &= hold */\r
- shrl %cl, hold_r\r
- addl %eax, len_r /* len += hold & mask[op] */\r
-\r
-.L_save_len:\r
- movl len_r, len(%esp) /* save len */\r
-#undef len_r\r
-\r
-.L_decode_distance:\r
- /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
- *\r
- * if (bits < 15) {\r
- * hold |= *((unsigned short *)in)++ << bits;\r
- * bits += 16\r
- * }\r
- * this = dcode[hold & dmask];\r
- * dodist:\r
- * bits -= this.bits;\r
- * hold >>= this.bits;\r
- * op = this.op;\r
- */\r
-\r
- cmpb $15, bits_r\r
- ja .L_get_distance_code /* if (15 < bits) */\r
-\r
- xorl %eax, %eax\r
- lodsw /* al = *(ushort *)in++ */\r
- movb bits_r, %cl /* cl = bits, needs it for shifting */\r
- addb $16, bits_r /* bits += 16 */\r
- shll %cl, %eax\r
- orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */\r
-\r
-.L_get_distance_code:\r
- movl dmask(%esp), %edx /* edx = dmask */\r
- movl dcode(%esp), %ecx /* ecx = dcode */\r
- andl hold_r, %edx /* edx &= hold */\r
- movl (%ecx,%edx,4), %eax /* eax = dcode[hold & dmask] */\r
-\r
-#else /* USE_MMX */\r
-\r
-.L_test_for_length_base:\r
- testb $16, %al\r
- jz .L_test_for_second_level_length /* if ((op & 16) == 0) 8% */\r
- andl $15, %eax /* op &= 15 */\r
- jz .L_decode_distance /* if (!op) */\r
-\r
- psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
- movd %eax, used_mm\r
- movd hold_mm, %ecx\r
- subl %eax, bits_r\r
- andl .L_mask(,%eax,4), %ecx\r
- addl %ecx, len_r /* len += hold & mask[op] */\r
-\r
-.L_decode_distance:\r
-\r
- psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
-\r
- cmpl $32, bits_r\r
- ja .L_get_dist_code /* if (32 < bits) */\r
-\r
- movd bits_r, tmp_mm\r
- movd (in_r), %mm7\r
- addl $4, in_r\r
- psllq tmp_mm, %mm7\r
- addl $32, bits_r\r
- por %mm7, hold_mm /* hold_mm |= *((uint *)in)++ << bits */\r
-\r
-.L_get_dist_code:\r
- movl dcode(%esp), %ebx /* ebx = dcode */\r
- pand hold_mm, dmask_mm\r
- movd dmask_mm, %eax\r
- movq dmask2_mm, dmask_mm\r
- movl (%ebx,%eax,4), %eax /* eax = dcode[hold & lmask] */\r
-\r
-#endif\r
-\r
-#if ! defined( USE_MMX )\r
-\r
-#define dist_r %edx\r
-.L_dodist:\r
- movl %eax, dist_r /* dist = this */\r
- shrl $16, dist_r /* dist = this.val */\r
- movb %ah, %cl\r
- subb %ah, bits_r /* bits -= this.bits */\r
- shrl %cl, hold_r /* hold >>= this.bits */\r
-\r
- /* if (op & 16) {\r
- * dist = this.val\r
- * op &= 15\r
- * if (op > bits) {\r
- * hold |= *((unsigned short *)in)++ << bits;\r
- * bits += 16\r
- * }\r
- * dist += hold & mask[op];\r
- * bits -= op;\r
- * hold >>= op;\r
- */\r
- movb %al, %cl /* cl = this.op */\r
-\r
- testb $16, %al /* if ((op & 16) == 0) */\r
- jz .L_test_for_second_level_dist\r
- andb $15, %cl /* op &= 15 */\r
- jz .L_check_dist_one\r
- cmpb %cl, bits_r\r
- jae .L_add_bits_to_dist /* if (op <= bits) 97.6% */\r
-\r
- movb %cl, %ch /* stash op in ch, freeing cl */\r
- xorl %eax, %eax\r
- lodsw /* al = *(ushort *)in++ */\r
- movb bits_r, %cl /* cl = bits, needs it for shifting */\r
- addb $16, bits_r /* bits += 16 */\r
- shll %cl, %eax\r
- orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */\r
- movb %ch, %cl /* move op back to ecx */\r
-\r
-.L_add_bits_to_dist:\r
- movl $1, %eax\r
- shll %cl, %eax\r
- decl %eax /* (1 << op) - 1 */\r
- subb %cl, bits_r\r
- andl hold_r, %eax /* eax &= hold */\r
- shrl %cl, hold_r\r
- addl %eax, dist_r /* dist += hold & ((1 << op) - 1) */\r
- jmp .L_check_window\r
-\r
-#else /* USE_MMX */\r
-\r
-#define dist_r %ebx\r
-.L_dodist:\r
- movzbl %ah, %ecx /* ecx = this.bits */\r
- movl %eax, dist_r\r
- shrl $16, dist_r /* dist = this.val */\r
- subl %ecx, bits_r /* bits -= this.bits */\r
- movd %ecx, used_mm\r
-\r
- testb $16, %al /* if ((op & 16) == 0) */\r
- jz .L_test_for_second_level_dist \r
- andl $15, %eax /* op &= 15 */\r
- jz .L_check_dist_one\r
-\r
-.L_add_bits_to_dist:\r
- psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
- movd %eax, used_mm /* save bit length of current op */\r
- movd hold_mm, %ecx /* get the next bits on input stream */\r
- subl %eax, bits_r /* bits -= op bits */\r
- andl .L_mask(,%eax,4), %ecx /* ecx = hold & mask[op] */\r
- addl %ecx, dist_r /* dist += hold & mask[op] */\r
- jmp .L_check_window\r
-\r
-#endif\r
-\r
-.align 16,0x90\r
-\r
-.L_check_dist_one:\r
- cmpl $1, dist_r\r
- jne .L_check_window\r
- cmpl out_r, beg(%esp)\r
- je .L_check_window\r
-\r
- decl out_r\r
-#if ! defined( USE_MMX )\r
- movl len(%esp), %ecx\r
-#else\r
- movl len_r, %ecx\r
-#endif\r
- movb (out_r), %al\r
- subl $3, %ecx\r
-\r
- movb %al, 1(out_r)\r
- movb %al, 2(out_r)\r
- movb %al, 3(out_r)\r
- addl $4, out_r\r
- rep stosb\r
-\r
-#if defined( USE_MMX )\r
- movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */\r
-#endif\r
- jmp .L_while_test\r
-\r
-.align 16,0x90\r
-\r
-.L_check_window:\r
- /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
- * %ecx = nbytes\r
- *\r
- * nbytes = out - beg;\r
- * if (dist <= nbytes) {\r
- * from = out - dist;\r
- * do {\r
- * PUP(out) = PUP(from);\r
- * } while (--len > 0) {\r
- * }\r
- */\r
-\r
- movl in_r, in(%esp) /* save in so from can use it's reg */\r
- movl out_r, %eax\r
- subl beg(%esp), %eax /* nbytes = out - beg */\r
-\r
- cmpl dist_r, %eax\r
- jb .L_clip_window /* if (dist > nbytes) 4.2% */\r
-\r
-#if ! defined( USE_MMX )\r
- movl len(%esp), %ecx\r
-#else\r
- movl len_r, %ecx\r
-#endif\r
- movl out_r, from_r\r
- subl dist_r, from_r /* from = out - dist */\r
-\r
- subl $3, %ecx\r
- movb (from_r), %al\r
- movb %al, (out_r)\r
- movb 1(from_r), %al\r
- movb 2(from_r), %dl\r
- addl $3, from_r\r
- movb %al, 1(out_r)\r
- movb %dl, 2(out_r)\r
- addl $3, out_r\r
- rep movsb\r
-\r
- movl in(%esp), in_r /* move in back to %esi, toss from */\r
-#if defined( USE_MMX )\r
- movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */\r
-#endif\r
- jmp .L_while_test\r
-\r
-.align 16,0x90\r
-\r
-#if ! defined( USE_MMX )\r
-\r
-.L_test_for_second_level_length:\r
- /* else if ((op & 64) == 0) {\r
- * this = lcode[this.val + (hold & mask[op])];\r
- * }\r
- */\r
- testb $64, %al\r
- jnz .L_test_for_end_of_block /* if ((op & 64) != 0) */\r
-\r
- movl $1, %eax\r
- shll %cl, %eax\r
- decl %eax\r
- andl hold_r, %eax /* eax &= hold */\r
- addl %edx, %eax /* eax += this.val */\r
- movl lcode(%esp), %edx /* edx = lcode */\r
- movl (%edx,%eax,4), %eax /* eax = lcode[val + (hold&mask[op])] */\r
- jmp .L_dolen\r
-\r
-#else /* USE_MMX */\r
-\r
-.L_test_for_second_level_length: \r
- testb $64, %al\r
- jnz .L_test_for_end_of_block /* if ((op & 64) != 0) */\r
-\r
- andl $15, %eax\r
- psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
- movd hold_mm, %ecx\r
- andl .L_mask(,%eax,4), %ecx\r
- addl len_r, %ecx\r
- movl (%ebx,%ecx,4), %eax /* eax = lcode[hold & lmask] */\r
- jmp .L_dolen\r
-\r
-#endif\r
-\r
-.align 16,0x90\r
-\r
-#if ! defined( USE_MMX )\r
-\r
-.L_test_for_second_level_dist:\r
- /* else if ((op & 64) == 0) {\r
- * this = dcode[this.val + (hold & mask[op])];\r
- * }\r
- */\r
- testb $64, %al\r
- jnz .L_invalid_distance_code /* if ((op & 64) != 0) */\r
-\r
- movl $1, %eax\r
- shll %cl, %eax\r
- decl %eax\r
- andl hold_r, %eax /* eax &= hold */\r
- addl %edx, %eax /* eax += this.val */\r
- movl dcode(%esp), %edx /* edx = dcode */\r
- movl (%edx,%eax,4), %eax /* eax = dcode[val + (hold&mask[op])] */\r
- jmp .L_dodist\r
-\r
-#else /* USE_MMX */\r
-\r
-.L_test_for_second_level_dist:\r
- testb $64, %al\r
- jnz .L_invalid_distance_code /* if ((op & 64) != 0) */\r
-\r
- andl $15, %eax\r
- psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
- movd hold_mm, %ecx\r
- andl .L_mask(,%eax,4), %ecx\r
- movl dcode(%esp), %eax /* ecx = dcode */\r
- addl dist_r, %ecx\r
- movl (%eax,%ecx,4), %eax /* eax = lcode[hold & lmask] */\r
- jmp .L_dodist\r
-\r
-#endif\r
-\r
-.align 16,0x90\r
-.L_clip_window:\r
- /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
- * %ecx = nbytes\r
- *\r
- * else {\r
- * if (dist > wsize) {\r
- * invalid distance\r
- * }\r
- * from = window;\r
- * nbytes = dist - nbytes;\r
- * if (write == 0) {\r
- * from += wsize - nbytes;\r
- */\r
-#define nbytes_r %ecx\r
-\r
- movl %eax, nbytes_r\r
- movl wsize(%esp), %eax /* prepare for dist compare */\r
- negl nbytes_r /* nbytes = -nbytes */\r
- movl window(%esp), from_r /* from = window */\r
-\r
- cmpl dist_r, %eax\r
- jb .L_invalid_distance_too_far /* if (dist > wsize) */\r
-\r
- addl dist_r, nbytes_r /* nbytes = dist - nbytes */\r
- cmpl $0, write(%esp)\r
- jne .L_wrap_around_window /* if (write != 0) */\r
-\r
- subl nbytes_r, %eax\r
- addl %eax, from_r /* from += wsize - nbytes */\r
-\r
- /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
- * %ecx = nbytes, %eax = len\r
- *\r
- * if (nbytes < len) {\r
- * len -= nbytes;\r
- * do {\r
- * PUP(out) = PUP(from);\r
- * } while (--nbytes);\r
- * from = out - dist;\r
- * }\r
- * }\r
- */\r
-\r
-#if ! defined( USE_MMX )\r
-#define len_r %eax\r
- movl len(%esp), len_r\r
-#endif\r
- cmpl nbytes_r, len_r\r
- jbe .L_do_copy1 /* if (nbytes >= len) */\r
-\r
- subl nbytes_r, len_r /* len -= nbytes */\r
- rep movsb\r
- movl out_r, from_r\r
- subl dist_r, from_r /* from = out - dist */\r
- jmp .L_do_copy1\r
-\r
- cmpl nbytes_r, len_r\r
- jbe .L_do_copy1 /* if (nbytes >= len) */\r
-\r
- subl nbytes_r, len_r /* len -= nbytes */\r
- rep movsb\r
- movl out_r, from_r\r
- subl dist_r, from_r /* from = out - dist */\r
- jmp .L_do_copy1\r
-\r
-.L_wrap_around_window:\r
- /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
- * %ecx = nbytes, %eax = write, %eax = len\r
- *\r
- * else if (write < nbytes) {\r
- * from += wsize + write - nbytes;\r
- * nbytes -= write;\r
- * if (nbytes < len) {\r
- * len -= nbytes;\r
- * do {\r
- * PUP(out) = PUP(from);\r
- * } while (--nbytes);\r
- * from = window;\r
- * nbytes = write;\r
- * if (nbytes < len) {\r
- * len -= nbytes;\r
- * do {\r
- * PUP(out) = PUP(from);\r
- * } while(--nbytes);\r
- * from = out - dist;\r
- * }\r
- * }\r
- * }\r
- */\r
-#define write_r %eax\r
-\r
- movl write(%esp), write_r\r
- cmpl write_r, nbytes_r\r
- jbe .L_contiguous_in_window /* if (write >= nbytes) */\r
-\r
- addl wsize(%esp), from_r\r
- addl write_r, from_r\r
- subl nbytes_r, from_r /* from += wsize + write - nbytes */\r
- subl write_r, nbytes_r /* nbytes -= write */\r
-#undef write_r\r
-\r
-#if ! defined( USE_MMX )\r
- movl len(%esp), len_r\r
-#endif\r
- cmpl nbytes_r, len_r\r
- jbe .L_do_copy1 /* if (nbytes >= len) */\r
-\r
- subl nbytes_r, len_r /* len -= nbytes */\r
- rep movsb\r
- movl window(%esp), from_r /* from = window */\r
- movl write(%esp), nbytes_r /* nbytes = write */\r
- cmpl nbytes_r, len_r\r
- jbe .L_do_copy1 /* if (nbytes >= len) */\r
-\r
- subl nbytes_r, len_r /* len -= nbytes */\r
- rep movsb\r
- movl out_r, from_r\r
- subl dist_r, from_r /* from = out - dist */\r
- jmp .L_do_copy1\r
-\r
-.L_contiguous_in_window:\r
- /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
- * %ecx = nbytes, %eax = write, %eax = len\r
- *\r
- * else {\r
- * from += write - nbytes;\r
- * if (nbytes < len) {\r
- * len -= nbytes;\r
- * do {\r
- * PUP(out) = PUP(from);\r
- * } while (--nbytes);\r
- * from = out - dist;\r
- * }\r
- * }\r
- */\r
-#define write_r %eax\r
-\r
- addl write_r, from_r\r
- subl nbytes_r, from_r /* from += write - nbytes */\r
-#undef write_r\r
-\r
-#if ! defined( USE_MMX )\r
- movl len(%esp), len_r\r
-#endif\r
- cmpl nbytes_r, len_r\r
- jbe .L_do_copy1 /* if (nbytes >= len) */\r
-\r
- subl nbytes_r, len_r /* len -= nbytes */\r
- rep movsb\r
- movl out_r, from_r\r
- subl dist_r, from_r /* from = out - dist */\r
-\r
-.L_do_copy1:\r
- /* regs: %esi = from, %esi = in, %ebp = hold, %bl = bits, %edi = out\r
- * %eax = len\r
- *\r
- * while (len > 0) {\r
- * PUP(out) = PUP(from);\r
- * len--;\r
- * }\r
- * }\r
- * } while (in < last && out < end);\r
- */\r
-#undef nbytes_r\r
-#define in_r %esi\r
-\r
- movl len_r, %ecx\r
- rep movsb\r
-\r
- movl in(%esp), in_r /* move in back to %esi, toss from */\r
-#if defined( USE_MMX )\r
- movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */\r
-#endif\r
- jmp .L_while_test\r
-\r
-#undef len_r\r
-#undef from_r\r
-#undef dist_r\r
-\r
-.L_invalid_distance_code:\r
- /* else {\r
- * strm->msg = "invalid distance code";\r
- * state->mode = BAD;\r
- * }\r
- */\r
- movl $.L_invalid_distance_code_msg, %ecx\r
- movl $INFLATE_MODE_BAD, %edx\r
- jmp .L_update_stream_state\r
-\r
-.L_test_for_end_of_block:\r
- /* else if (op & 32) {\r
- * state->mode = TYPE;\r
- * break;\r
- * }\r
- */\r
- testb $32, %al\r
- jz .L_invalid_literal_length_code /* if ((op & 32) == 0) */\r
-\r
- movl $0, %ecx\r
- movl $INFLATE_MODE_TYPE, %edx\r
- jmp .L_update_stream_state\r
-\r
-.L_invalid_literal_length_code:\r
- /* else {\r
- * strm->msg = "invalid literal/length code";\r
- * state->mode = BAD;\r
- * }\r
- */\r
- movl $.L_invalid_literal_length_code_msg, %ecx\r
- movl $INFLATE_MODE_BAD, %edx\r
- jmp .L_update_stream_state\r
-\r
-.L_invalid_distance_too_far:\r
- /* strm->msg = "invalid distance too far back";\r
- * state->mode = BAD;\r
- */\r
- movl in(%esp), in_r /* from_r has in's reg, put in back */\r
- movl $.L_invalid_distance_too_far_msg, %ecx\r
- movl $INFLATE_MODE_BAD, %edx\r
- jmp .L_update_stream_state\r
-\r
-.L_update_stream_state:\r
- /* set strm->msg = %ecx, strm->state->mode = %edx */\r
- movl strm_sp(%esp), %eax\r
- testl %ecx, %ecx /* if (msg != NULL) */\r
- jz .L_skip_msg\r
- movl %ecx, msg_strm(%eax) /* strm->msg = msg */\r
-.L_skip_msg:\r
- movl state_strm(%eax), %eax /* state = strm->state */\r
- movl %edx, mode_state(%eax) /* state->mode = edx (BAD | TYPE) */\r
-\r
-.L_break_loop:\r
-\r
-#define strm_r %eax\r
-#define state_r %edx\r
-\r
- /* len = bits >> 3;\r
- * in -= len;\r
- * bits -= len << 3;\r
- * hold &= (1U << bits) - 1;\r
- * state->hold = hold;\r
- * state->bits = bits;\r
- * strm->next_in = in;\r
- * strm->next_out = out;\r
- */\r
- movl strm_sp(%esp), strm_r\r
- movl bitslong_r, %ecx\r
- movl state_strm(strm_r), state_r\r
- shrl $3, %ecx\r
- subl %ecx, in_r\r
- shll $3, %ecx\r
- subl %ecx, bitslong_r\r
- movl out_r, next_out_strm(strm_r)\r
- movl in_r, next_in_strm(strm_r)\r
- movl bitslong_r, bits_state(state_r)\r
-\r
- movl bitslong_r, %ecx\r
- movl $1, %ebx /* overwrites bitslong_r, %bl */\r
- shll %cl, %ebx\r
- decl %ebx\r
-\r
-#undef bits_r\r
-#undef bitslong_r\r
-\r
-#if ! defined( USE_MMX )\r
-\r
- andl %ebx, hold_r\r
- movl hold_r, hold_state(state_r)\r
-\r
-#else /* USE_MMX */\r
-\r
- psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
- movd hold_mm, %ecx\r
- andl %ebx, %ecx\r
- movl %ecx, hold_state(state_r)\r
-\r
-#endif\r
-\r
-#define last_r %ebx\r
-\r
- /* strm->avail_in = in < last ? 5 + (last - in) : 5 - (in - last) */\r
- movl last(%esp), last_r\r
- cmpl in_r, last_r\r
- jbe .L_last_is_smaller /* if (in >= last) */\r
-\r
- subl in_r, last_r /* last -= in */\r
- addl $5, last_r /* last += 5 */\r
- movl last_r, avail_in_strm(strm_r)\r
- jmp .L_fixup_out\r
-.L_last_is_smaller:\r
- subl last_r, in_r /* in -= last */\r
- negl in_r /* in = -in */\r
- addl $5, in_r /* in += 5 */\r
- movl in_r, avail_in_strm(strm_r)\r
-\r
-#undef last_r\r
-#define end_r %ebx\r
-\r
-.L_fixup_out:\r
- /* strm->avail_out = out < end ? 257 + (end - out) : 257 - (out - end)*/\r
- movl end(%esp), end_r\r
- cmpl out_r, end_r\r
- jbe .L_end_is_smaller /* if (out >= end) */\r
-\r
- subl out_r, end_r /* end -= out */\r
- addl $257, end_r /* end += 257 */\r
- movl end_r, avail_out_strm(strm_r)\r
- jmp .L_done\r
-.L_end_is_smaller:\r
- subl end_r, out_r /* out -= end */\r
- negl out_r /* out = -out */\r
- addl $257, out_r /* out += 257 */\r
- movl out_r, avail_out_strm(strm_r)\r
-\r
-#undef end_r\r
-\r
-.L_done:\r
-#if defined( USE_MMX )\r
- emms\r
-#endif\r
- addl $local_var_size, %esp\r
- popf\r
- popl %ebx\r
- popl %ebp\r
- popl %esi\r
- popl %edi\r
- ret\r
-\r
-.type inflate_fast,@function\r
-.size inflate_fast,.-inflate_fast\r
+/*
+ * inffast.S 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.
+ *
+ * This version (Jan-23-2003) of inflate_fast was coded and tested under
+ * GNU/Linux on a pentium 3, using the gcc-3.2 compiler distribution. On that
+ * machine, I found that gzip style archives decompressed about 20% faster than
+ * the gcc-3.2 -O3 -fomit-frame-pointer compiled version. Your results will
+ * depend on how large of a buffer is used for z_stream.next_in & next_out
+ * (8K-32K worked best for my 256K cpu cache) and how much overhead there is in
+ * stream processing I/O and crc32/addler32. In my case, this routine used
+ * 70% of the cpu time and crc32 used 20%.
+ *
+ * I am confident that this version will work in the general case, but I have
+ * not tested a wide variety of datasets or a wide variety of platforms.
+ *
+ * Jan-24-2003 -- Added -DUSE_MMX define for slightly faster inflating.
+ * It should be a runtime flag instead of compile time flag...
+ *
+ * Jan-26-2003 -- Added runtime check for MMX support with cpuid instruction.
+ * With -DUSE_MMX, only MMX code is compiled. With -DNO_MMX, only non-MMX code
+ * is compiled. Without either option, runtime detection is enabled. Runtime
+ * detection should work on all modern cpus and the recomended algorithm (flip
+ * ID bit on eflags and then use the cpuid instruction) is used in many
+ * multimedia applications. Tested under win2k with gcc-2.95 and gas-2.12
+ * distributed with cygwin3. Compiling with gcc-2.95 -c inffast.S -o
+ * inffast.obj generates a COFF object which can then be linked with MSVC++
+ * compiled code. Tested under FreeBSD 4.7 with gcc-2.95.
+ *
+ * Jan-28-2003 -- Tested Athlon XP... MMX mode is slower than no MMX (and
+ * slower than compiler generated code). Adjusted cpuid check to use the MMX
+ * code only for Pentiums < P4 until I have more data on the P4. Speed
+ * improvment is only about 15% on the Athlon when compared with code generated
+ * with MSVC++. Not sure yet, but I think the P4 will also be slower using the
+ * MMX mode because many of it's x86 ALU instructions execute in .5 cycles and
+ * have less latency than MMX ops. Added code to buffer the last 11 bytes of
+ * the input stream since the MMX code grabs bits in chunks of 32, which
+ * differs from the inffast.c algorithm. I don't think there would have been
+ * read overruns where a page boundary was crossed (a segfault), but there
+ * could have been overruns when next_in ends on unaligned memory (unintialized
+ * memory read).
+ *
+ * Mar-13-2003 -- P4 MMX is slightly slower than P4 NO_MMX. I created a C
+ * version of the non-MMX code so that it doesn't depend on zstrm and zstate
+ * structure offsets which are hard coded in this file. This was last tested
+ * with zlib-1.2.0 which is currently in beta testing, newer versions of this
+ * and inffas86.c can be found at http://www.eetbeetee.com/zlib/ and
+ * http://www.charm.net/~christop/zlib/
+ */
+
+
+/*
+ * if you have underscore linking problems (_inflate_fast undefined), try
+ * using -DGAS_COFF
+ */
+#if ! defined( GAS_COFF ) && ! defined( GAS_ELF )
+
+#if defined( WIN32 ) || defined( __CYGWIN__ )
+#define GAS_COFF /* windows object format */
+#else
+#define GAS_ELF
+#endif
+
+#endif /* ! GAS_COFF && ! GAS_ELF */
+
+
+#if defined( GAS_COFF )
+
+/* coff externals have underscores */
+#define inflate_fast _inflate_fast
+#define inflate_fast_use_mmx _inflate_fast_use_mmx
+
+#endif /* GAS_COFF */
+
+
+.file "inffast.S"
+
+.globl inflate_fast
+
+.text
+.align 4,0
+.L_invalid_literal_length_code_msg:
+.string "invalid literal/length code"
+
+.align 4,0
+.L_invalid_distance_code_msg:
+.string "invalid distance code"
+
+.align 4,0
+.L_invalid_distance_too_far_msg:
+.string "invalid distance too far back"
+
+#if ! defined( NO_MMX )
+.align 4,0
+.L_mask: /* mask[N] = ( 1 << N ) - 1 */
+.long 0
+.long 1
+.long 3
+.long 7
+.long 15
+.long 31
+.long 63
+.long 127
+.long 255
+.long 511
+.long 1023
+.long 2047
+.long 4095
+.long 8191
+.long 16383
+.long 32767
+.long 65535
+.long 131071
+.long 262143
+.long 524287
+.long 1048575
+.long 2097151
+.long 4194303
+.long 8388607
+.long 16777215
+.long 33554431
+.long 67108863
+.long 134217727
+.long 268435455
+.long 536870911
+.long 1073741823
+.long 2147483647
+.long 4294967295
+#endif /* NO_MMX */
+
+.text
+
+/*
+ * struct z_stream offsets, in zlib.h
+ */
+#define next_in_strm 0 /* strm->next_in */
+#define avail_in_strm 4 /* strm->avail_in */
+#define next_out_strm 12 /* strm->next_out */
+#define avail_out_strm 16 /* strm->avail_out */
+#define msg_strm 24 /* strm->msg */
+#define state_strm 28 /* strm->state */
+
+/*
+ * struct inflate_state offsets, in inflate.h
+ */
+#define mode_state 0 /* state->mode */
+#define wsize_state 32 /* state->wsize */
+#define write_state 40 /* state->write */
+#define window_state 44 /* state->window */
+#define hold_state 48 /* state->hold */
+#define bits_state 52 /* state->bits */
+#define lencode_state 68 /* state->lencode */
+#define distcode_state 72 /* state->distcode */
+#define lenbits_state 76 /* state->lenbits */
+#define distbits_state 80 /* state->distbits */
+
+/*
+ * inflate_fast's activation record
+ */
+#define local_var_size 64 /* how much local space for vars */
+#define strm_sp 88 /* first arg: z_stream * (local_var_size + 24) */
+#define start_sp 92 /* second arg: unsigned int (local_var_size + 28) */
+
+/*
+ * offsets for local vars on stack
+ */
+#define out 60 /* unsigned char* */
+#define window 56 /* unsigned char* */
+#define wsize 52 /* unsigned int */
+#define write 48 /* unsigned int */
+#define in 44 /* unsigned char* */
+#define beg 40 /* unsigned char* */
+#define buf 28 /* char[ 12 ] */
+#define len 24 /* unsigned int */
+#define last 20 /* unsigned char* */
+#define end 16 /* unsigned char* */
+#define dcode 12 /* code* */
+#define lcode 8 /* code* */
+#define dmask 4 /* unsigned int */
+#define lmask 0 /* unsigned int */
+
+/*
+ * typedef enum inflate_mode consts, in inflate.h
+ */
+#define INFLATE_MODE_TYPE 11 /* state->mode flags enum-ed in inflate.h */
+#define INFLATE_MODE_BAD 26
+
+
+#if ! defined( USE_MMX ) && ! defined( NO_MMX )
+
+#define RUN_TIME_MMX
+
+#define CHECK_MMX 1
+#define DO_USE_MMX 2
+#define DONT_USE_MMX 3
+
+.globl inflate_fast_use_mmx
+
+.data
+
+.align 4,0
+inflate_fast_use_mmx: /* integer flag for run time control 1=check,2=mmx,3=no */
+.long CHECK_MMX
+
+#if defined( GAS_ELF )
+/* elf info */
+.type inflate_fast_use_mmx,@object
+.size inflate_fast_use_mmx,4
+#endif
+
+#endif /* RUN_TIME_MMX */
+
+#if defined( GAS_COFF )
+/* coff info: scl 2 = extern, type 32 = function */
+.def inflate_fast; .scl 2; .type 32; .endef
+#endif
+
+.text
+
+.align 32,0x90
+inflate_fast:
+ pushl %edi
+ pushl %esi
+ pushl %ebp
+ pushl %ebx
+ pushf /* save eflags (strm_sp, state_sp assumes this is 32 bits) */
+ subl $local_var_size, %esp
+ cld
+
+#define strm_r %esi
+#define state_r %edi
+
+ movl strm_sp(%esp), strm_r
+ movl state_strm(strm_r), state_r
+
+ /* in = strm->next_in;
+ * out = strm->next_out;
+ * last = in + strm->avail_in - 11;
+ * beg = out - (start - strm->avail_out);
+ * end = out + (strm->avail_out - 257);
+ */
+ movl avail_in_strm(strm_r), %edx
+ movl next_in_strm(strm_r), %eax
+
+ addl %eax, %edx /* avail_in += next_in */
+ subl $11, %edx /* avail_in -= 11 */
+
+ movl %eax, in(%esp)
+ movl %edx, last(%esp)
+
+ movl start_sp(%esp), %ebp
+ movl avail_out_strm(strm_r), %ecx
+ movl next_out_strm(strm_r), %ebx
+
+ subl %ecx, %ebp /* start -= avail_out */
+ negl %ebp /* start = -start */
+ addl %ebx, %ebp /* start += next_out */
+
+ subl $257, %ecx /* avail_out -= 257 */
+ addl %ebx, %ecx /* avail_out += out */
+
+ movl %ebx, out(%esp)
+ movl %ebp, beg(%esp)
+ movl %ecx, end(%esp)
+
+ /* wsize = state->wsize;
+ * write = state->write;
+ * window = state->window;
+ * hold = state->hold;
+ * bits = state->bits;
+ * lcode = state->lencode;
+ * dcode = state->distcode;
+ * lmask = ( 1 << state->lenbits ) - 1;
+ * dmask = ( 1 << state->distbits ) - 1;
+ */
+
+ movl lencode_state(state_r), %eax
+ movl distcode_state(state_r), %ecx
+
+ movl %eax, lcode(%esp)
+ movl %ecx, dcode(%esp)
+
+ movl $1, %eax
+ movl lenbits_state(state_r), %ecx
+ shll %cl, %eax
+ decl %eax
+ movl %eax, lmask(%esp)
+
+ movl $1, %eax
+ movl distbits_state(state_r), %ecx
+ shll %cl, %eax
+ decl %eax
+ movl %eax, dmask(%esp)
+
+ movl wsize_state(state_r), %eax
+ movl write_state(state_r), %ecx
+ movl window_state(state_r), %edx
+
+ movl %eax, wsize(%esp)
+ movl %ecx, write(%esp)
+ movl %edx, window(%esp)
+
+ movl hold_state(state_r), %ebp
+ movl bits_state(state_r), %ebx
+
+#undef strm_r
+#undef state_r
+
+#define in_r %esi
+#define from_r %esi
+#define out_r %edi
+
+ movl in(%esp), in_r
+ movl last(%esp), %ecx
+ cmpl in_r, %ecx
+ ja .L_align_long /* if in < last */
+
+ addl $11, %ecx /* ecx = &in[ avail_in ] */
+ subl in_r, %ecx /* ecx = avail_in */
+ movl $12, %eax
+ subl %ecx, %eax /* eax = 12 - avail_in */
+ leal buf(%esp), %edi
+ rep movsb /* memcpy( buf, in, avail_in ) */
+ movl %eax, %ecx
+ xorl %eax, %eax
+ rep stosb /* memset( &buf[ avail_in ], 0, 12 - avail_in ) */
+ leal buf(%esp), in_r /* in = buf */
+ movl in_r, last(%esp) /* last = in, do just one iteration */
+ jmp .L_is_aligned
+
+ /* align in_r on long boundary */
+.L_align_long:
+ testl $3, in_r
+ jz .L_is_aligned
+ xorl %eax, %eax
+ movb (in_r), %al
+ incl in_r
+ movl %ebx, %ecx
+ addl $8, %ebx
+ shll %cl, %eax
+ orl %eax, %ebp
+ jmp .L_align_long
+
+.L_is_aligned:
+ movl out(%esp), out_r
+
+#if defined( NO_MMX )
+ jmp .L_do_loop
+#endif
+
+#if defined( USE_MMX )
+ jmp .L_init_mmx
+#endif
+
+/*** Runtime MMX check ***/
+
+#if defined( RUN_TIME_MMX )
+.L_check_mmx:
+ cmpl $DO_USE_MMX, inflate_fast_use_mmx
+ je .L_init_mmx
+ ja .L_do_loop /* > 2 */
+
+ pushl %eax
+ pushl %ebx
+ pushl %ecx
+ pushl %edx
+ pushf
+ movl (%esp), %eax /* copy eflags to eax */
+ xorl $0x200000, (%esp) /* try toggling ID bit of eflags (bit 21)
+ * to see if cpu supports cpuid...
+ * ID bit method not supported by NexGen but
+ * bios may load a cpuid instruction and
+ * cpuid may be disabled on Cyrix 5-6x86 */
+ popf
+ pushf
+ popl %edx /* copy new eflags to edx */
+ xorl %eax, %edx /* test if ID bit is flipped */
+ jz .L_dont_use_mmx /* not flipped if zero */
+ xorl %eax, %eax
+ cpuid
+ cmpl $0x756e6547, %ebx /* check for GenuineIntel in ebx,ecx,edx */
+ jne .L_dont_use_mmx
+ cmpl $0x6c65746e, %ecx
+ jne .L_dont_use_mmx
+ cmpl $0x49656e69, %edx
+ jne .L_dont_use_mmx
+ movl $1, %eax
+ cpuid /* get cpu features */
+ shrl $8, %eax
+ andl $15, %eax
+ cmpl $6, %eax /* check for Pentium family, is 0xf for P4 */
+ jne .L_dont_use_mmx
+ testl $0x800000, %edx /* test if MMX feature is set (bit 23) */
+ jnz .L_use_mmx
+ jmp .L_dont_use_mmx
+.L_use_mmx:
+ movl $DO_USE_MMX, inflate_fast_use_mmx
+ jmp .L_check_mmx_pop
+.L_dont_use_mmx:
+ movl $DONT_USE_MMX, inflate_fast_use_mmx
+.L_check_mmx_pop:
+ popl %edx
+ popl %ecx
+ popl %ebx
+ popl %eax
+ jmp .L_check_mmx
+#endif
+
+
+/*** Non-MMX code ***/
+
+#if defined ( NO_MMX ) || defined( RUN_TIME_MMX )
+
+#define hold_r %ebp
+#define bits_r %bl
+#define bitslong_r %ebx
+
+.align 32,0x90
+.L_while_test:
+ /* 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:
+ /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out
+ *
+ * do {
+ * if (bits < 15) {
+ * hold |= *((unsigned short *)in)++ << bits;
+ * bits += 16
+ * }
+ * this = lcode[hold & lmask]
+ */
+ cmpb $15, bits_r
+ ja .L_get_length_code /* if (15 < bits) */
+
+ 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_length_code:
+ movl lmask(%esp), %edx /* edx = lmask */
+ movl lcode(%esp), %ecx /* ecx = lcode */
+ andl hold_r, %edx /* edx &= hold */
+ movl (%ecx,%edx,4), %eax /* eax = lcode[hold & lmask] */
+
+.L_dolen:
+ /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out
+ *
+ * dolen:
+ * bits -= this.bits;
+ * hold >>= this.bits
+ */
+ movb %ah, %cl /* cl = this.bits */
+ subb %ah, bits_r /* bits -= this.bits */
+ shrl %cl, hold_r /* hold >>= this.bits */
+
+ /* check if op is a literal
+ * if (op == 0) {
+ * PUP(out) = this.val;
+ * }
+ */
+ testb %al, %al
+ jnz .L_test_for_length_base /* if (op != 0) 45.7% */
+
+ shrl $16, %eax /* output this.val char */
+ stosb
+ jmp .L_while_test
+
+.L_test_for_length_base:
+ /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = len
+ *
+ * else if (op & 16) {
+ * len = this.val
+ * op &= 15
+ * if (op) {
+ * if (op > bits) {
+ * hold |= *((unsigned short *)in)++ << bits;
+ * bits += 16
+ * }
+ * len += hold & mask[op];
+ * bits -= op;
+ * hold >>= op;
+ * }
+ */
+#define len_r %edx
+ movl %eax, len_r /* len = this */
+ shrl $16, len_r /* len = this.val */
+ movb %al, %cl
+
+ testb $16, %al
+ jz .L_test_for_second_level_length /* if ((op & 16) == 0) 8% */
+ andb $15, %cl /* op &= 15 */
+ jz .L_save_len /* if (!op) */
+ cmpb %cl, bits_r
+ jae .L_add_bits_to_len /* if (op <= bits) */
+
+ 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_len:
+ movl $1, %eax
+ shll %cl, %eax
+ decl %eax
+ subb %cl, bits_r
+ andl hold_r, %eax /* eax &= hold */
+ shrl %cl, hold_r
+ addl %eax, len_r /* len += hold & mask[op] */
+
+.L_save_len:
+ movl len_r, len(%esp) /* save len */
+#undef len_r
+
+.L_decode_distance:
+ /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = dist
+ *
+ * if (bits < 15) {
+ * hold |= *((unsigned short *)in)++ << bits;
+ * bits += 16
+ * }
+ * this = dcode[hold & dmask];
+ * dodist:
+ * bits -= this.bits;
+ * hold >>= this.bits;
+ * op = this.op;
+ */
+
+ cmpb $15, bits_r
+ ja .L_get_distance_code /* if (15 < bits) */
+
+ 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