--- /dev/null
+/*\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
/* header created automatically with -DGEN_TREES_H */
+/*@observer@*/ /*@unchecked@*/
local const ct_data static_ltree[L_CODES+2] = {
{{ 12},{ 8}}, {{140},{ 8}}, {{ 76},{ 8}}, {{204},{ 8}}, {{ 44},{ 8}},
{{172},{ 8}}, {{108},{ 8}}, {{236},{ 8}}, {{ 28},{ 8}}, {{156},{ 8}},
{{163},{ 8}}, {{ 99},{ 8}}, {{227},{ 8}}
};
+/*@observer@*/ /*@unchecked@*/
local const ct_data static_dtree[D_CODES] = {
{{ 0},{ 5}}, {{16},{ 5}}, {{ 8},{ 5}}, {{24},{ 5}}, {{ 4},{ 5}},
{{20},{ 5}}, {{12},{ 5}}, {{28},{ 5}}, {{ 2},{ 5}}, {{18},{ 5}},
{{19},{ 5}}, {{11},{ 5}}, {{27},{ 5}}, {{ 7},{ 5}}, {{23},{ 5}}
};
+/*@observer@*/ /*@unchecked@*/
const uch _dist_code[DIST_CODE_LEN] = {
0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8,
8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10,
29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29
};
+/*@observer@*/ /*@unchecked@*/
const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {
0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 12,
13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28
};
+/*@observer@*/ /*@unchecked@*/
local const int base_length[LENGTH_CODES] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
64, 80, 96, 112, 128, 160, 192, 224, 0
};
+/*@observer@*/ /*@unchecked@*/
local const int base_dist[D_CODES] = {
0, 1, 2, 3, 4, 6, 8, 12, 16, 24,
32, 48, 64, 96, 128, 192, 256, 384, 512, 768,
projects / platform / upstream / rpm.git / commitdiff