cannam@128: /* cannam@128: * inffast.S is a hand tuned assembler version of: cannam@128: * cannam@128: * inffast.c -- fast decoding cannam@128: * Copyright (C) 1995-2003 Mark Adler cannam@128: * For conditions of distribution and use, see copyright notice in zlib.h cannam@128: * cannam@128: * Copyright (C) 2003 Chris Anderson cannam@128: * Please use the copyright conditions above. cannam@128: * cannam@128: * This version (Jan-23-2003) of inflate_fast was coded and tested under cannam@128: * GNU/Linux on a pentium 3, using the gcc-3.2 compiler distribution. On that cannam@128: * machine, I found that gzip style archives decompressed about 20% faster than cannam@128: * the gcc-3.2 -O3 -fomit-frame-pointer compiled version. Your results will cannam@128: * depend on how large of a buffer is used for z_stream.next_in & next_out cannam@128: * (8K-32K worked best for my 256K cpu cache) and how much overhead there is in cannam@128: * stream processing I/O and crc32/addler32. In my case, this routine used cannam@128: * 70% of the cpu time and crc32 used 20%. cannam@128: * cannam@128: * I am confident that this version will work in the general case, but I have cannam@128: * not tested a wide variety of datasets or a wide variety of platforms. cannam@128: * cannam@128: * Jan-24-2003 -- Added -DUSE_MMX define for slightly faster inflating. cannam@128: * It should be a runtime flag instead of compile time flag... cannam@128: * cannam@128: * Jan-26-2003 -- Added runtime check for MMX support with cpuid instruction. cannam@128: * With -DUSE_MMX, only MMX code is compiled. With -DNO_MMX, only non-MMX code cannam@128: * is compiled. Without either option, runtime detection is enabled. Runtime cannam@128: * detection should work on all modern cpus and the recomended algorithm (flip cannam@128: * ID bit on eflags and then use the cpuid instruction) is used in many cannam@128: * multimedia applications. Tested under win2k with gcc-2.95 and gas-2.12 cannam@128: * distributed with cygwin3. Compiling with gcc-2.95 -c inffast.S -o cannam@128: * inffast.obj generates a COFF object which can then be linked with MSVC++ cannam@128: * compiled code. Tested under FreeBSD 4.7 with gcc-2.95. cannam@128: * cannam@128: * Jan-28-2003 -- Tested Athlon XP... MMX mode is slower than no MMX (and cannam@128: * slower than compiler generated code). Adjusted cpuid check to use the MMX cannam@128: * code only for Pentiums < P4 until I have more data on the P4. Speed cannam@128: * improvment is only about 15% on the Athlon when compared with code generated cannam@128: * with MSVC++. Not sure yet, but I think the P4 will also be slower using the cannam@128: * MMX mode because many of it's x86 ALU instructions execute in .5 cycles and cannam@128: * have less latency than MMX ops. Added code to buffer the last 11 bytes of cannam@128: * the input stream since the MMX code grabs bits in chunks of 32, which cannam@128: * differs from the inffast.c algorithm. I don't think there would have been cannam@128: * read overruns where a page boundary was crossed (a segfault), but there cannam@128: * could have been overruns when next_in ends on unaligned memory (unintialized cannam@128: * memory read). cannam@128: * cannam@128: * Mar-13-2003 -- P4 MMX is slightly slower than P4 NO_MMX. I created a C cannam@128: * version of the non-MMX code so that it doesn't depend on zstrm and zstate cannam@128: * structure offsets which are hard coded in this file. This was last tested cannam@128: * with zlib-1.2.0 which is currently in beta testing, newer versions of this cannam@128: * and inffas86.c can be found at http://www.eetbeetee.com/zlib/ and cannam@128: * http://www.charm.net/~christop/zlib/ cannam@128: */ cannam@128: cannam@128: cannam@128: /* cannam@128: * if you have underscore linking problems (_inflate_fast undefined), try cannam@128: * using -DGAS_COFF cannam@128: */ cannam@128: #if ! defined( GAS_COFF ) && ! defined( GAS_ELF ) cannam@128: cannam@128: #if defined( WIN32 ) || defined( __CYGWIN__ ) cannam@128: #define GAS_COFF /* windows object format */ cannam@128: #else cannam@128: #define GAS_ELF cannam@128: #endif cannam@128: cannam@128: #endif /* ! GAS_COFF && ! GAS_ELF */ cannam@128: cannam@128: cannam@128: #if defined( GAS_COFF ) cannam@128: cannam@128: /* coff externals have underscores */ cannam@128: #define inflate_fast _inflate_fast cannam@128: #define inflate_fast_use_mmx _inflate_fast_use_mmx cannam@128: cannam@128: #endif /* GAS_COFF */ cannam@128: cannam@128: cannam@128: .file "inffast.S" cannam@128: cannam@128: .globl inflate_fast cannam@128: cannam@128: .text cannam@128: .align 4,0 cannam@128: .L_invalid_literal_length_code_msg: cannam@128: .string "invalid literal/length code" cannam@128: cannam@128: .align 4,0 cannam@128: .L_invalid_distance_code_msg: cannam@128: .string "invalid distance code" cannam@128: cannam@128: .align 4,0 cannam@128: .L_invalid_distance_too_far_msg: cannam@128: .string "invalid distance too far back" cannam@128: cannam@128: #if ! defined( NO_MMX ) cannam@128: .align 4,0 cannam@128: .L_mask: /* mask[N] = ( 1 << N ) - 1 */ cannam@128: .long 0 cannam@128: .long 1 cannam@128: .long 3 cannam@128: .long 7 cannam@128: .long 15 cannam@128: .long 31 cannam@128: .long 63 cannam@128: .long 127 cannam@128: .long 255 cannam@128: .long 511 cannam@128: .long 1023 cannam@128: .long 2047 cannam@128: .long 4095 cannam@128: .long 8191 cannam@128: .long 16383 cannam@128: .long 32767 cannam@128: .long 65535 cannam@128: .long 131071 cannam@128: .long 262143 cannam@128: .long 524287 cannam@128: .long 1048575 cannam@128: .long 2097151 cannam@128: .long 4194303 cannam@128: .long 8388607 cannam@128: .long 16777215 cannam@128: .long 33554431 cannam@128: .long 67108863 cannam@128: .long 134217727 cannam@128: .long 268435455 cannam@128: .long 536870911 cannam@128: .long 1073741823 cannam@128: .long 2147483647 cannam@128: .long 4294967295 cannam@128: #endif /* NO_MMX */ cannam@128: cannam@128: .text cannam@128: cannam@128: /* cannam@128: * struct z_stream offsets, in zlib.h cannam@128: */ cannam@128: #define next_in_strm 0 /* strm->next_in */ cannam@128: #define avail_in_strm 4 /* strm->avail_in */ cannam@128: #define next_out_strm 12 /* strm->next_out */ cannam@128: #define avail_out_strm 16 /* strm->avail_out */ cannam@128: #define msg_strm 24 /* strm->msg */ cannam@128: #define state_strm 28 /* strm->state */ cannam@128: cannam@128: /* cannam@128: * struct inflate_state offsets, in inflate.h cannam@128: */ cannam@128: #define mode_state 0 /* state->mode */ cannam@128: #define wsize_state 32 /* state->wsize */ cannam@128: #define write_state 40 /* state->write */ cannam@128: #define window_state 44 /* state->window */ cannam@128: #define hold_state 48 /* state->hold */ cannam@128: #define bits_state 52 /* state->bits */ cannam@128: #define lencode_state 68 /* state->lencode */ cannam@128: #define distcode_state 72 /* state->distcode */ cannam@128: #define lenbits_state 76 /* state->lenbits */ cannam@128: #define distbits_state 80 /* state->distbits */ cannam@128: cannam@128: /* cannam@128: * inflate_fast's activation record cannam@128: */ cannam@128: #define local_var_size 64 /* how much local space for vars */ cannam@128: #define strm_sp 88 /* first arg: z_stream * (local_var_size + 24) */ cannam@128: #define start_sp 92 /* second arg: unsigned int (local_var_size + 28) */ cannam@128: cannam@128: /* cannam@128: * offsets for local vars on stack cannam@128: */ cannam@128: #define out 60 /* unsigned char* */ cannam@128: #define window 56 /* unsigned char* */ cannam@128: #define wsize 52 /* unsigned int */ cannam@128: #define write 48 /* unsigned int */ cannam@128: #define in 44 /* unsigned char* */ cannam@128: #define beg 40 /* unsigned char* */ cannam@128: #define buf 28 /* char[ 12 ] */ cannam@128: #define len 24 /* unsigned int */ cannam@128: #define last 20 /* unsigned char* */ cannam@128: #define end 16 /* unsigned char* */ cannam@128: #define dcode 12 /* code* */ cannam@128: #define lcode 8 /* code* */ cannam@128: #define dmask 4 /* unsigned int */ cannam@128: #define lmask 0 /* unsigned int */ cannam@128: cannam@128: /* cannam@128: * typedef enum inflate_mode consts, in inflate.h cannam@128: */ cannam@128: #define INFLATE_MODE_TYPE 11 /* state->mode flags enum-ed in inflate.h */ cannam@128: #define INFLATE_MODE_BAD 26 cannam@128: cannam@128: cannam@128: #if ! defined( USE_MMX ) && ! defined( NO_MMX ) cannam@128: cannam@128: #define RUN_TIME_MMX cannam@128: cannam@128: #define CHECK_MMX 1 cannam@128: #define DO_USE_MMX 2 cannam@128: #define DONT_USE_MMX 3 cannam@128: cannam@128: .globl inflate_fast_use_mmx cannam@128: cannam@128: .data cannam@128: cannam@128: .align 4,0 cannam@128: inflate_fast_use_mmx: /* integer flag for run time control 1=check,2=mmx,3=no */ cannam@128: .long CHECK_MMX cannam@128: cannam@128: #if defined( GAS_ELF ) cannam@128: /* elf info */ cannam@128: .type inflate_fast_use_mmx,@object cannam@128: .size inflate_fast_use_mmx,4 cannam@128: #endif cannam@128: cannam@128: #endif /* RUN_TIME_MMX */ cannam@128: cannam@128: #if defined( GAS_COFF ) cannam@128: /* coff info: scl 2 = extern, type 32 = function */ cannam@128: .def inflate_fast; .scl 2; .type 32; .endef cannam@128: #endif cannam@128: cannam@128: .text cannam@128: cannam@128: .align 32,0x90 cannam@128: inflate_fast: cannam@128: pushl %edi cannam@128: pushl %esi cannam@128: pushl %ebp cannam@128: pushl %ebx cannam@128: pushf /* save eflags (strm_sp, state_sp assumes this is 32 bits) */ cannam@128: subl $local_var_size, %esp cannam@128: cld cannam@128: cannam@128: #define strm_r %esi cannam@128: #define state_r %edi cannam@128: cannam@128: movl strm_sp(%esp), strm_r cannam@128: movl state_strm(strm_r), state_r cannam@128: cannam@128: /* in = strm->next_in; cannam@128: * out = strm->next_out; cannam@128: * last = in + strm->avail_in - 11; cannam@128: * beg = out - (start - strm->avail_out); cannam@128: * end = out + (strm->avail_out - 257); cannam@128: */ cannam@128: movl avail_in_strm(strm_r), %edx cannam@128: movl next_in_strm(strm_r), %eax cannam@128: cannam@128: addl %eax, %edx /* avail_in += next_in */ cannam@128: subl $11, %edx /* avail_in -= 11 */ cannam@128: cannam@128: movl %eax, in(%esp) cannam@128: movl %edx, last(%esp) cannam@128: cannam@128: movl start_sp(%esp), %ebp cannam@128: movl avail_out_strm(strm_r), %ecx cannam@128: movl next_out_strm(strm_r), %ebx cannam@128: cannam@128: subl %ecx, %ebp /* start -= avail_out */ cannam@128: negl %ebp /* start = -start */ cannam@128: addl %ebx, %ebp /* start += next_out */ cannam@128: cannam@128: subl $257, %ecx /* avail_out -= 257 */ cannam@128: addl %ebx, %ecx /* avail_out += out */ cannam@128: cannam@128: movl %ebx, out(%esp) cannam@128: movl %ebp, beg(%esp) cannam@128: movl %ecx, end(%esp) cannam@128: cannam@128: /* wsize = state->wsize; cannam@128: * write = state->write; cannam@128: * window = state->window; cannam@128: * hold = state->hold; cannam@128: * bits = state->bits; cannam@128: * lcode = state->lencode; cannam@128: * dcode = state->distcode; cannam@128: * lmask = ( 1 << state->lenbits ) - 1; cannam@128: * dmask = ( 1 << state->distbits ) - 1; cannam@128: */ cannam@128: cannam@128: movl lencode_state(state_r), %eax cannam@128: movl distcode_state(state_r), %ecx cannam@128: cannam@128: movl %eax, lcode(%esp) cannam@128: movl %ecx, dcode(%esp) cannam@128: cannam@128: movl $1, %eax cannam@128: movl lenbits_state(state_r), %ecx cannam@128: shll %cl, %eax cannam@128: decl %eax cannam@128: movl %eax, lmask(%esp) cannam@128: cannam@128: movl $1, %eax cannam@128: movl distbits_state(state_r), %ecx cannam@128: shll %cl, %eax cannam@128: decl %eax cannam@128: movl %eax, dmask(%esp) cannam@128: cannam@128: movl wsize_state(state_r), %eax cannam@128: movl write_state(state_r), %ecx cannam@128: movl window_state(state_r), %edx cannam@128: cannam@128: movl %eax, wsize(%esp) cannam@128: movl %ecx, write(%esp) cannam@128: movl %edx, window(%esp) cannam@128: cannam@128: movl hold_state(state_r), %ebp cannam@128: movl bits_state(state_r), %ebx cannam@128: cannam@128: #undef strm_r cannam@128: #undef state_r cannam@128: cannam@128: #define in_r %esi cannam@128: #define from_r %esi cannam@128: #define out_r %edi cannam@128: cannam@128: movl in(%esp), in_r cannam@128: movl last(%esp), %ecx cannam@128: cmpl in_r, %ecx cannam@128: ja .L_align_long /* if in < last */ cannam@128: cannam@128: addl $11, %ecx /* ecx = &in[ avail_in ] */ cannam@128: subl in_r, %ecx /* ecx = avail_in */ cannam@128: movl $12, %eax cannam@128: subl %ecx, %eax /* eax = 12 - avail_in */ cannam@128: leal buf(%esp), %edi cannam@128: rep movsb /* memcpy( buf, in, avail_in ) */ cannam@128: movl %eax, %ecx cannam@128: xorl %eax, %eax cannam@128: rep stosb /* memset( &buf[ avail_in ], 0, 12 - avail_in ) */ cannam@128: leal buf(%esp), in_r /* in = buf */ cannam@128: movl in_r, last(%esp) /* last = in, do just one iteration */ cannam@128: jmp .L_is_aligned cannam@128: cannam@128: /* align in_r on long boundary */ cannam@128: .L_align_long: cannam@128: testl $3, in_r cannam@128: jz .L_is_aligned cannam@128: xorl %eax, %eax cannam@128: movb (in_r), %al cannam@128: incl in_r cannam@128: movl %ebx, %ecx cannam@128: addl $8, %ebx cannam@128: shll %cl, %eax cannam@128: orl %eax, %ebp cannam@128: jmp .L_align_long cannam@128: cannam@128: .L_is_aligned: cannam@128: movl out(%esp), out_r cannam@128: cannam@128: #if defined( NO_MMX ) cannam@128: jmp .L_do_loop cannam@128: #endif cannam@128: cannam@128: #if defined( USE_MMX ) cannam@128: jmp .L_init_mmx cannam@128: #endif cannam@128: cannam@128: /*** Runtime MMX check ***/ cannam@128: cannam@128: #if defined( RUN_TIME_MMX ) cannam@128: .L_check_mmx: cannam@128: cmpl $DO_USE_MMX, inflate_fast_use_mmx cannam@128: je .L_init_mmx cannam@128: ja .L_do_loop /* > 2 */ cannam@128: cannam@128: pushl %eax cannam@128: pushl %ebx cannam@128: pushl %ecx cannam@128: pushl %edx cannam@128: pushf cannam@128: movl (%esp), %eax /* copy eflags to eax */ cannam@128: xorl $0x200000, (%esp) /* try toggling ID bit of eflags (bit 21) cannam@128: * to see if cpu supports cpuid... cannam@128: * ID bit method not supported by NexGen but cannam@128: * bios may load a cpuid instruction and cannam@128: * cpuid may be disabled on Cyrix 5-6x86 */ cannam@128: popf cannam@128: pushf cannam@128: popl %edx /* copy new eflags to edx */ cannam@128: xorl %eax, %edx /* test if ID bit is flipped */ cannam@128: jz .L_dont_use_mmx /* not flipped if zero */ cannam@128: xorl %eax, %eax cannam@128: cpuid cannam@128: cmpl $0x756e6547, %ebx /* check for GenuineIntel in ebx,ecx,edx */ cannam@128: jne .L_dont_use_mmx cannam@128: cmpl $0x6c65746e, %ecx cannam@128: jne .L_dont_use_mmx cannam@128: cmpl $0x49656e69, %edx cannam@128: jne .L_dont_use_mmx cannam@128: movl $1, %eax cannam@128: cpuid /* get cpu features */ cannam@128: shrl $8, %eax cannam@128: andl $15, %eax cannam@128: cmpl $6, %eax /* check for Pentium family, is 0xf for P4 */ cannam@128: jne .L_dont_use_mmx cannam@128: testl $0x800000, %edx /* test if MMX feature is set (bit 23) */ cannam@128: jnz .L_use_mmx cannam@128: jmp .L_dont_use_mmx cannam@128: .L_use_mmx: cannam@128: movl $DO_USE_MMX, inflate_fast_use_mmx cannam@128: jmp .L_check_mmx_pop cannam@128: .L_dont_use_mmx: cannam@128: movl $DONT_USE_MMX, inflate_fast_use_mmx cannam@128: .L_check_mmx_pop: cannam@128: popl %edx cannam@128: popl %ecx cannam@128: popl %ebx cannam@128: popl %eax cannam@128: jmp .L_check_mmx cannam@128: #endif cannam@128: cannam@128: cannam@128: /*** Non-MMX code ***/ cannam@128: cannam@128: #if defined ( NO_MMX ) || defined( RUN_TIME_MMX ) cannam@128: cannam@128: #define hold_r %ebp cannam@128: #define bits_r %bl cannam@128: #define bitslong_r %ebx cannam@128: cannam@128: .align 32,0x90 cannam@128: .L_while_test: cannam@128: /* while (in < last && out < end) cannam@128: */ cannam@128: cmpl out_r, end(%esp) cannam@128: jbe .L_break_loop /* if (out >= end) */ cannam@128: cannam@128: cmpl in_r, last(%esp) cannam@128: jbe .L_break_loop cannam@128: cannam@128: .L_do_loop: cannam@128: /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out cannam@128: * cannam@128: * do { cannam@128: * if (bits < 15) { cannam@128: * hold |= *((unsigned short *)in)++ << bits; cannam@128: * bits += 16 cannam@128: * } cannam@128: * this = lcode[hold & lmask] cannam@128: */ cannam@128: cmpb $15, bits_r cannam@128: ja .L_get_length_code /* if (15 < bits) */ cannam@128: cannam@128: xorl %eax, %eax cannam@128: lodsw /* al = *(ushort *)in++ */ cannam@128: movb bits_r, %cl /* cl = bits, needs it for shifting */ cannam@128: addb $16, bits_r /* bits += 16 */ cannam@128: shll %cl, %eax cannam@128: orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */ cannam@128: cannam@128: .L_get_length_code: cannam@128: movl lmask(%esp), %edx /* edx = lmask */ cannam@128: movl lcode(%esp), %ecx /* ecx = lcode */ cannam@128: andl hold_r, %edx /* edx &= hold */ cannam@128: movl (%ecx,%edx,4), %eax /* eax = lcode[hold & lmask] */ cannam@128: cannam@128: .L_dolen: cannam@128: /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out cannam@128: * cannam@128: * dolen: cannam@128: * bits -= this.bits; cannam@128: * hold >>= this.bits cannam@128: */ cannam@128: movb %ah, %cl /* cl = this.bits */ cannam@128: subb %ah, bits_r /* bits -= this.bits */ cannam@128: shrl %cl, hold_r /* hold >>= this.bits */ cannam@128: cannam@128: /* check if op is a literal cannam@128: * if (op == 0) { cannam@128: * PUP(out) = this.val; cannam@128: * } cannam@128: */ cannam@128: testb %al, %al cannam@128: jnz .L_test_for_length_base /* if (op != 0) 45.7% */ cannam@128: cannam@128: shrl $16, %eax /* output this.val char */ cannam@128: stosb cannam@128: jmp .L_while_test cannam@128: cannam@128: .L_test_for_length_base: cannam@128: /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = len cannam@128: * cannam@128: * else if (op & 16) { cannam@128: * len = this.val cannam@128: * op &= 15 cannam@128: * if (op) { cannam@128: * if (op > bits) { cannam@128: * hold |= *((unsigned short *)in)++ << bits; cannam@128: * bits += 16 cannam@128: * } cannam@128: * len += hold & mask[op]; cannam@128: * bits -= op; cannam@128: * hold >>= op; cannam@128: * } cannam@128: */ cannam@128: #define len_r %edx cannam@128: movl %eax, len_r /* len = this */ cannam@128: shrl $16, len_r /* len = this.val */ cannam@128: movb %al, %cl cannam@128: cannam@128: testb $16, %al cannam@128: jz .L_test_for_second_level_length /* if ((op & 16) == 0) 8% */ cannam@128: andb $15, %cl /* op &= 15 */ cannam@128: jz .L_save_len /* if (!op) */ cannam@128: cmpb %cl, bits_r cannam@128: jae .L_add_bits_to_len /* if (op <= bits) */ cannam@128: cannam@128: movb %cl, %ch /* stash op in ch, freeing cl */ cannam@128: xorl %eax, %eax cannam@128: lodsw /* al = *(ushort *)in++ */ cannam@128: movb bits_r, %cl /* cl = bits, needs it for shifting */ cannam@128: addb $16, bits_r /* bits += 16 */ cannam@128: shll %cl, %eax cannam@128: orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */ cannam@128: movb %ch, %cl /* move op back to ecx */ cannam@128: cannam@128: .L_add_bits_to_len: cannam@128: movl $1, %eax cannam@128: shll %cl, %eax cannam@128: decl %eax cannam@128: subb %cl, bits_r cannam@128: andl hold_r, %eax /* eax &= hold */ cannam@128: shrl %cl, hold_r cannam@128: addl %eax, len_r /* len += hold & mask[op] */ cannam@128: cannam@128: .L_save_len: cannam@128: movl len_r, len(%esp) /* save len */ cannam@128: #undef len_r cannam@128: cannam@128: .L_decode_distance: cannam@128: /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = dist cannam@128: * cannam@128: * if (bits < 15) { cannam@128: * hold |= *((unsigned short *)in)++ << bits; cannam@128: * bits += 16 cannam@128: * } cannam@128: * this = dcode[hold & dmask]; cannam@128: * dodist: cannam@128: * bits -= this.bits; cannam@128: * hold >>= this.bits; cannam@128: * op = this.op; cannam@128: */ cannam@128: cannam@128: cmpb $15, bits_r cannam@128: ja .L_get_distance_code /* if (15 < bits) */ cannam@128: cannam@128: xorl %eax, %eax cannam@128: lodsw /* al = *(ushort *)in++ */ cannam@128: movb bits_r, %cl /* cl = bits, needs it for shifting */ cannam@128: addb $16, bits_r /* bits += 16 */ cannam@128: shll %cl, %eax cannam@128: orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */ cannam@128: cannam@128: .L_get_distance_code: cannam@128: movl dmask(%esp), %edx /* edx = dmask */ cannam@128: movl dcode(%esp), %ecx /* ecx = dcode */ cannam@128: andl hold_r, %edx /* edx &= hold */ cannam@128: movl (%ecx,%edx,4), %eax /* eax = dcode[hold & dmask] */ cannam@128: cannam@128: #define dist_r %edx cannam@128: .L_dodist: cannam@128: movl %eax, dist_r /* dist = this */ cannam@128: shrl $16, dist_r /* dist = this.val */ cannam@128: movb %ah, %cl cannam@128: subb %ah, bits_r /* bits -= this.bits */ cannam@128: shrl %cl, hold_r /* hold >>= this.bits */ cannam@128: cannam@128: /* if (op & 16) { cannam@128: * dist = this.val cannam@128: * op &= 15 cannam@128: * if (op > bits) { cannam@128: * hold |= *((unsigned short *)in)++ << bits; cannam@128: * bits += 16 cannam@128: * } cannam@128: * dist += hold & mask[op]; cannam@128: * bits -= op; cannam@128: * hold >>= op; cannam@128: */ cannam@128: movb %al, %cl /* cl = this.op */ cannam@128: cannam@128: testb $16, %al /* if ((op & 16) == 0) */ cannam@128: jz .L_test_for_second_level_dist cannam@128: andb $15, %cl /* op &= 15 */ cannam@128: jz .L_check_dist_one cannam@128: cmpb %cl, bits_r cannam@128: jae .L_add_bits_to_dist /* if (op <= bits) 97.6% */ cannam@128: cannam@128: movb %cl, %ch /* stash op in ch, freeing cl */ cannam@128: xorl %eax, %eax cannam@128: lodsw /* al = *(ushort *)in++ */ cannam@128: movb bits_r, %cl /* cl = bits, needs it for shifting */ cannam@128: addb $16, bits_r /* bits += 16 */ cannam@128: shll %cl, %eax cannam@128: orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */ cannam@128: movb %ch, %cl /* move op back to ecx */ cannam@128: cannam@128: .L_add_bits_to_dist: cannam@128: movl $1, %eax cannam@128: shll %cl, %eax cannam@128: decl %eax /* (1 << op) - 1 */ cannam@128: subb %cl, bits_r cannam@128: andl hold_r, %eax /* eax &= hold */ cannam@128: shrl %cl, hold_r cannam@128: addl %eax, dist_r /* dist += hold & ((1 << op) - 1) */ cannam@128: jmp .L_check_window cannam@128: cannam@128: .L_check_window: cannam@128: /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist cannam@128: * %ecx = nbytes cannam@128: * cannam@128: * nbytes = out - beg; cannam@128: * if (dist <= nbytes) { cannam@128: * from = out - dist; cannam@128: * do { cannam@128: * PUP(out) = PUP(from); cannam@128: * } while (--len > 0) { cannam@128: * } cannam@128: */ cannam@128: cannam@128: movl in_r, in(%esp) /* save in so from can use it's reg */ cannam@128: movl out_r, %eax cannam@128: subl beg(%esp), %eax /* nbytes = out - beg */ cannam@128: cannam@128: cmpl dist_r, %eax cannam@128: jb .L_clip_window /* if (dist > nbytes) 4.2% */ cannam@128: cannam@128: movl len(%esp), %ecx cannam@128: movl out_r, from_r cannam@128: subl dist_r, from_r /* from = out - dist */ cannam@128: cannam@128: subl $3, %ecx cannam@128: movb (from_r), %al cannam@128: movb %al, (out_r) cannam@128: movb 1(from_r), %al cannam@128: movb 2(from_r), %dl cannam@128: addl $3, from_r cannam@128: movb %al, 1(out_r) cannam@128: movb %dl, 2(out_r) cannam@128: addl $3, out_r cannam@128: rep movsb cannam@128: cannam@128: movl in(%esp), in_r /* move in back to %esi, toss from */ cannam@128: jmp .L_while_test cannam@128: cannam@128: .align 16,0x90 cannam@128: .L_check_dist_one: cannam@128: cmpl $1, dist_r cannam@128: jne .L_check_window cannam@128: cmpl out_r, beg(%esp) cannam@128: je .L_check_window cannam@128: cannam@128: decl out_r cannam@128: movl len(%esp), %ecx cannam@128: movb (out_r), %al cannam@128: subl $3, %ecx cannam@128: cannam@128: movb %al, 1(out_r) cannam@128: movb %al, 2(out_r) cannam@128: movb %al, 3(out_r) cannam@128: addl $4, out_r cannam@128: rep stosb cannam@128: cannam@128: jmp .L_while_test cannam@128: cannam@128: .align 16,0x90 cannam@128: .L_test_for_second_level_length: cannam@128: /* else if ((op & 64) == 0) { cannam@128: * this = lcode[this.val + (hold & mask[op])]; cannam@128: * } cannam@128: */ cannam@128: testb $64, %al cannam@128: jnz .L_test_for_end_of_block /* if ((op & 64) != 0) */ cannam@128: cannam@128: movl $1, %eax cannam@128: shll %cl, %eax cannam@128: decl %eax cannam@128: andl hold_r, %eax /* eax &= hold */ cannam@128: addl %edx, %eax /* eax += this.val */ cannam@128: movl lcode(%esp), %edx /* edx = lcode */ cannam@128: movl (%edx,%eax,4), %eax /* eax = lcode[val + (hold&mask[op])] */ cannam@128: jmp .L_dolen cannam@128: cannam@128: .align 16,0x90 cannam@128: .L_test_for_second_level_dist: cannam@128: /* else if ((op & 64) == 0) { cannam@128: * this = dcode[this.val + (hold & mask[op])]; cannam@128: * } cannam@128: */ cannam@128: testb $64, %al cannam@128: jnz .L_invalid_distance_code /* if ((op & 64) != 0) */ cannam@128: cannam@128: movl $1, %eax cannam@128: shll %cl, %eax cannam@128: decl %eax cannam@128: andl hold_r, %eax /* eax &= hold */ cannam@128: addl %edx, %eax /* eax += this.val */ cannam@128: movl dcode(%esp), %edx /* edx = dcode */ cannam@128: movl (%edx,%eax,4), %eax /* eax = dcode[val + (hold&mask[op])] */ cannam@128: jmp .L_dodist cannam@128: cannam@128: .align 16,0x90 cannam@128: .L_clip_window: cannam@128: /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist cannam@128: * %ecx = nbytes cannam@128: * cannam@128: * else { cannam@128: * if (dist > wsize) { cannam@128: * invalid distance cannam@128: * } cannam@128: * from = window; cannam@128: * nbytes = dist - nbytes; cannam@128: * if (write == 0) { cannam@128: * from += wsize - nbytes; cannam@128: */ cannam@128: #define nbytes_r %ecx cannam@128: movl %eax, nbytes_r cannam@128: movl wsize(%esp), %eax /* prepare for dist compare */ cannam@128: negl nbytes_r /* nbytes = -nbytes */ cannam@128: movl window(%esp), from_r /* from = window */ cannam@128: cannam@128: cmpl dist_r, %eax cannam@128: jb .L_invalid_distance_too_far /* if (dist > wsize) */ cannam@128: cannam@128: addl dist_r, nbytes_r /* nbytes = dist - nbytes */ cannam@128: cmpl $0, write(%esp) cannam@128: jne .L_wrap_around_window /* if (write != 0) */ cannam@128: cannam@128: subl nbytes_r, %eax cannam@128: addl %eax, from_r /* from += wsize - nbytes */ cannam@128: cannam@128: /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist cannam@128: * %ecx = nbytes, %eax = len cannam@128: * cannam@128: * if (nbytes < len) { cannam@128: * len -= nbytes; cannam@128: * do { cannam@128: * PUP(out) = PUP(from); cannam@128: * } while (--nbytes); cannam@128: * from = out - dist; cannam@128: * } cannam@128: * } cannam@128: */ cannam@128: #define len_r %eax cannam@128: movl len(%esp), len_r cannam@128: cmpl nbytes_r, len_r cannam@128: jbe .L_do_copy1 /* if (nbytes >= len) */ cannam@128: cannam@128: subl nbytes_r, len_r /* len -= nbytes */ cannam@128: rep movsb cannam@128: movl out_r, from_r cannam@128: subl dist_r, from_r /* from = out - dist */ cannam@128: jmp .L_do_copy1 cannam@128: cannam@128: cmpl nbytes_r, len_r cannam@128: jbe .L_do_copy1 /* if (nbytes >= len) */ cannam@128: cannam@128: subl nbytes_r, len_r /* len -= nbytes */ cannam@128: rep movsb cannam@128: movl out_r, from_r cannam@128: subl dist_r, from_r /* from = out - dist */ cannam@128: jmp .L_do_copy1 cannam@128: cannam@128: .L_wrap_around_window: cannam@128: /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist cannam@128: * %ecx = nbytes, %eax = write, %eax = len cannam@128: * cannam@128: * else if (write < nbytes) { cannam@128: * from += wsize + write - nbytes; cannam@128: * nbytes -= write; cannam@128: * if (nbytes < len) { cannam@128: * len -= nbytes; cannam@128: * do { cannam@128: * PUP(out) = PUP(from); cannam@128: * } while (--nbytes); cannam@128: * from = window; cannam@128: * nbytes = write; cannam@128: * if (nbytes < len) { cannam@128: * len -= nbytes; cannam@128: * do { cannam@128: * PUP(out) = PUP(from); cannam@128: * } while(--nbytes); cannam@128: * from = out - dist; cannam@128: * } cannam@128: * } cannam@128: * } cannam@128: */ cannam@128: #define write_r %eax cannam@128: movl write(%esp), write_r cannam@128: cmpl write_r, nbytes_r cannam@128: jbe .L_contiguous_in_window /* if (write >= nbytes) */ cannam@128: cannam@128: addl wsize(%esp), from_r cannam@128: addl write_r, from_r cannam@128: subl nbytes_r, from_r /* from += wsize + write - nbytes */ cannam@128: subl write_r, nbytes_r /* nbytes -= write */ cannam@128: #undef write_r cannam@128: cannam@128: movl len(%esp), len_r cannam@128: cmpl nbytes_r, len_r cannam@128: jbe .L_do_copy1 /* if (nbytes >= len) */ cannam@128: cannam@128: subl nbytes_r, len_r /* len -= nbytes */ cannam@128: rep movsb cannam@128: movl window(%esp), from_r /* from = window */ cannam@128: movl write(%esp), nbytes_r /* nbytes = write */ cannam@128: cmpl nbytes_r, len_r cannam@128: jbe .L_do_copy1 /* if (nbytes >= len) */ cannam@128: cannam@128: subl nbytes_r, len_r /* len -= nbytes */ cannam@128: rep movsb cannam@128: movl out_r, from_r cannam@128: subl dist_r, from_r /* from = out - dist */ cannam@128: jmp .L_do_copy1 cannam@128: cannam@128: .L_contiguous_in_window: cannam@128: /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist cannam@128: * %ecx = nbytes, %eax = write, %eax = len cannam@128: * cannam@128: * else { cannam@128: * from += write - nbytes; cannam@128: * if (nbytes < len) { cannam@128: * len -= nbytes; cannam@128: * do { cannam@128: * PUP(out) = PUP(from); cannam@128: * } while (--nbytes); cannam@128: * from = out - dist; cannam@128: * } cannam@128: * } cannam@128: */ cannam@128: #define write_r %eax cannam@128: addl write_r, from_r cannam@128: subl nbytes_r, from_r /* from += write - nbytes */ cannam@128: #undef write_r cannam@128: cannam@128: movl len(%esp), len_r cannam@128: cmpl nbytes_r, len_r cannam@128: jbe .L_do_copy1 /* if (nbytes >= len) */ cannam@128: cannam@128: subl nbytes_r, len_r /* len -= nbytes */ cannam@128: rep movsb cannam@128: movl out_r, from_r cannam@128: subl dist_r, from_r /* from = out - dist */ cannam@128: cannam@128: .L_do_copy1: cannam@128: /* regs: %esi = from, %esi = in, %ebp = hold, %bl = bits, %edi = out cannam@128: * %eax = len cannam@128: * cannam@128: * while (len > 0) { cannam@128: * PUP(out) = PUP(from); cannam@128: * len--; cannam@128: * } cannam@128: * } cannam@128: * } while (in < last && out < end); cannam@128: */ cannam@128: #undef nbytes_r cannam@128: #define in_r %esi cannam@128: movl len_r, %ecx cannam@128: rep movsb cannam@128: cannam@128: movl in(%esp), in_r /* move in back to %esi, toss from */ cannam@128: jmp .L_while_test cannam@128: cannam@128: #undef len_r cannam@128: #undef dist_r cannam@128: cannam@128: #endif /* NO_MMX || RUN_TIME_MMX */ cannam@128: cannam@128: cannam@128: /*** MMX code ***/ cannam@128: cannam@128: #if defined( USE_MMX ) || defined( RUN_TIME_MMX ) cannam@128: cannam@128: .align 32,0x90 cannam@128: .L_init_mmx: cannam@128: emms cannam@128: cannam@128: #undef bits_r cannam@128: #undef bitslong_r cannam@128: #define bitslong_r %ebp cannam@128: #define hold_mm %mm0 cannam@128: movd %ebp, hold_mm cannam@128: movl %ebx, bitslong_r cannam@128: cannam@128: #define used_mm %mm1 cannam@128: #define dmask2_mm %mm2 cannam@128: #define lmask2_mm %mm3 cannam@128: #define lmask_mm %mm4 cannam@128: #define dmask_mm %mm5 cannam@128: #define tmp_mm %mm6 cannam@128: cannam@128: movd lmask(%esp), lmask_mm cannam@128: movq lmask_mm, lmask2_mm cannam@128: movd dmask(%esp), dmask_mm cannam@128: movq dmask_mm, dmask2_mm cannam@128: pxor used_mm, used_mm cannam@128: movl lcode(%esp), %ebx /* ebx = lcode */ cannam@128: jmp .L_do_loop_mmx cannam@128: cannam@128: .align 32,0x90 cannam@128: .L_while_test_mmx: cannam@128: /* while (in < last && out < end) cannam@128: */ cannam@128: cmpl out_r, end(%esp) cannam@128: jbe .L_break_loop /* if (out >= end) */ cannam@128: cannam@128: cmpl in_r, last(%esp) cannam@128: jbe .L_break_loop cannam@128: cannam@128: .L_do_loop_mmx: cannam@128: psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ cannam@128: cannam@128: cmpl $32, bitslong_r cannam@128: ja .L_get_length_code_mmx /* if (32 < bits) */ cannam@128: cannam@128: movd bitslong_r, tmp_mm cannam@128: movd (in_r), %mm7 cannam@128: addl $4, in_r cannam@128: psllq tmp_mm, %mm7 cannam@128: addl $32, bitslong_r cannam@128: por %mm7, hold_mm /* hold_mm |= *((uint *)in)++ << bits */ cannam@128: cannam@128: .L_get_length_code_mmx: cannam@128: pand hold_mm, lmask_mm cannam@128: movd lmask_mm, %eax cannam@128: movq lmask2_mm, lmask_mm cannam@128: movl (%ebx,%eax,4), %eax /* eax = lcode[hold & lmask] */ cannam@128: cannam@128: .L_dolen_mmx: cannam@128: movzbl %ah, %ecx /* ecx = this.bits */ cannam@128: movd %ecx, used_mm cannam@128: subl %ecx, bitslong_r /* bits -= this.bits */ cannam@128: cannam@128: testb %al, %al cannam@128: jnz .L_test_for_length_base_mmx /* if (op != 0) 45.7% */ cannam@128: cannam@128: shrl $16, %eax /* output this.val char */ cannam@128: stosb cannam@128: jmp .L_while_test_mmx cannam@128: cannam@128: .L_test_for_length_base_mmx: cannam@128: #define len_r %edx cannam@128: movl %eax, len_r /* len = this */ cannam@128: shrl $16, len_r /* len = this.val */ cannam@128: cannam@128: testb $16, %al cannam@128: jz .L_test_for_second_level_length_mmx /* if ((op & 16) == 0) 8% */ cannam@128: andl $15, %eax /* op &= 15 */ cannam@128: jz .L_decode_distance_mmx /* if (!op) */ cannam@128: cannam@128: psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ cannam@128: movd %eax, used_mm cannam@128: movd hold_mm, %ecx cannam@128: subl %eax, bitslong_r cannam@128: andl .L_mask(,%eax,4), %ecx cannam@128: addl %ecx, len_r /* len += hold & mask[op] */ cannam@128: cannam@128: .L_decode_distance_mmx: cannam@128: psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ cannam@128: cannam@128: cmpl $32, bitslong_r cannam@128: ja .L_get_dist_code_mmx /* if (32 < bits) */ cannam@128: cannam@128: movd bitslong_r, tmp_mm cannam@128: movd (in_r), %mm7 cannam@128: addl $4, in_r cannam@128: psllq tmp_mm, %mm7 cannam@128: addl $32, bitslong_r cannam@128: por %mm7, hold_mm /* hold_mm |= *((uint *)in)++ << bits */ cannam@128: cannam@128: .L_get_dist_code_mmx: cannam@128: movl dcode(%esp), %ebx /* ebx = dcode */ cannam@128: pand hold_mm, dmask_mm cannam@128: movd dmask_mm, %eax cannam@128: movq dmask2_mm, dmask_mm cannam@128: movl (%ebx,%eax,4), %eax /* eax = dcode[hold & lmask] */ cannam@128: cannam@128: .L_dodist_mmx: cannam@128: #define dist_r %ebx cannam@128: movzbl %ah, %ecx /* ecx = this.bits */ cannam@128: movl %eax, dist_r cannam@128: shrl $16, dist_r /* dist = this.val */ cannam@128: subl %ecx, bitslong_r /* bits -= this.bits */ cannam@128: movd %ecx, used_mm cannam@128: cannam@128: testb $16, %al /* if ((op & 16) == 0) */ cannam@128: jz .L_test_for_second_level_dist_mmx cannam@128: andl $15, %eax /* op &= 15 */ cannam@128: jz .L_check_dist_one_mmx cannam@128: cannam@128: .L_add_bits_to_dist_mmx: cannam@128: psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ cannam@128: movd %eax, used_mm /* save bit length of current op */ cannam@128: movd hold_mm, %ecx /* get the next bits on input stream */ cannam@128: subl %eax, bitslong_r /* bits -= op bits */ cannam@128: andl .L_mask(,%eax,4), %ecx /* ecx = hold & mask[op] */ cannam@128: addl %ecx, dist_r /* dist += hold & mask[op] */ cannam@128: cannam@128: .L_check_window_mmx: cannam@128: movl in_r, in(%esp) /* save in so from can use it's reg */ cannam@128: movl out_r, %eax cannam@128: subl beg(%esp), %eax /* nbytes = out - beg */ cannam@128: cannam@128: cmpl dist_r, %eax cannam@128: jb .L_clip_window_mmx /* if (dist > nbytes) 4.2% */ cannam@128: cannam@128: movl len_r, %ecx cannam@128: movl out_r, from_r cannam@128: subl dist_r, from_r /* from = out - dist */ cannam@128: cannam@128: subl $3, %ecx cannam@128: movb (from_r), %al cannam@128: movb %al, (out_r) cannam@128: movb 1(from_r), %al cannam@128: movb 2(from_r), %dl cannam@128: addl $3, from_r cannam@128: movb %al, 1(out_r) cannam@128: movb %dl, 2(out_r) cannam@128: addl $3, out_r cannam@128: rep movsb cannam@128: cannam@128: movl in(%esp), in_r /* move in back to %esi, toss from */ cannam@128: movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */ cannam@128: jmp .L_while_test_mmx cannam@128: cannam@128: .align 16,0x90 cannam@128: .L_check_dist_one_mmx: cannam@128: cmpl $1, dist_r cannam@128: jne .L_check_window_mmx cannam@128: cmpl out_r, beg(%esp) cannam@128: je .L_check_window_mmx cannam@128: cannam@128: decl out_r cannam@128: movl len_r, %ecx cannam@128: movb (out_r), %al cannam@128: subl $3, %ecx cannam@128: cannam@128: movb %al, 1(out_r) cannam@128: movb %al, 2(out_r) cannam@128: movb %al, 3(out_r) cannam@128: addl $4, out_r cannam@128: rep stosb cannam@128: cannam@128: movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */ cannam@128: jmp .L_while_test_mmx cannam@128: cannam@128: .align 16,0x90 cannam@128: .L_test_for_second_level_length_mmx: cannam@128: testb $64, %al cannam@128: jnz .L_test_for_end_of_block /* if ((op & 64) != 0) */ cannam@128: cannam@128: andl $15, %eax cannam@128: psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ cannam@128: movd hold_mm, %ecx cannam@128: andl .L_mask(,%eax,4), %ecx cannam@128: addl len_r, %ecx cannam@128: movl (%ebx,%ecx,4), %eax /* eax = lcode[hold & lmask] */ cannam@128: jmp .L_dolen_mmx cannam@128: cannam@128: .align 16,0x90 cannam@128: .L_test_for_second_level_dist_mmx: cannam@128: testb $64, %al cannam@128: jnz .L_invalid_distance_code /* if ((op & 64) != 0) */ cannam@128: cannam@128: andl $15, %eax cannam@128: psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ cannam@128: movd hold_mm, %ecx cannam@128: andl .L_mask(,%eax,4), %ecx cannam@128: movl dcode(%esp), %eax /* ecx = dcode */ cannam@128: addl dist_r, %ecx cannam@128: movl (%eax,%ecx,4), %eax /* eax = lcode[hold & lmask] */ cannam@128: jmp .L_dodist_mmx cannam@128: cannam@128: .align 16,0x90 cannam@128: .L_clip_window_mmx: cannam@128: #define nbytes_r %ecx cannam@128: movl %eax, nbytes_r cannam@128: movl wsize(%esp), %eax /* prepare for dist compare */ cannam@128: negl nbytes_r /* nbytes = -nbytes */ cannam@128: movl window(%esp), from_r /* from = window */ cannam@128: cannam@128: cmpl dist_r, %eax cannam@128: jb .L_invalid_distance_too_far /* if (dist > wsize) */ cannam@128: cannam@128: addl dist_r, nbytes_r /* nbytes = dist - nbytes */ cannam@128: cmpl $0, write(%esp) cannam@128: jne .L_wrap_around_window_mmx /* if (write != 0) */ cannam@128: cannam@128: subl nbytes_r, %eax cannam@128: addl %eax, from_r /* from += wsize - nbytes */ cannam@128: cannam@128: cmpl nbytes_r, len_r cannam@128: jbe .L_do_copy1_mmx /* if (nbytes >= len) */ cannam@128: cannam@128: subl nbytes_r, len_r /* len -= nbytes */ cannam@128: rep movsb cannam@128: movl out_r, from_r cannam@128: subl dist_r, from_r /* from = out - dist */ cannam@128: jmp .L_do_copy1_mmx cannam@128: cannam@128: cmpl nbytes_r, len_r cannam@128: jbe .L_do_copy1_mmx /* if (nbytes >= len) */ cannam@128: cannam@128: subl nbytes_r, len_r /* len -= nbytes */ cannam@128: rep movsb cannam@128: movl out_r, from_r cannam@128: subl dist_r, from_r /* from = out - dist */ cannam@128: jmp .L_do_copy1_mmx cannam@128: cannam@128: .L_wrap_around_window_mmx: cannam@128: #define write_r %eax cannam@128: movl write(%esp), write_r cannam@128: cmpl write_r, nbytes_r cannam@128: jbe .L_contiguous_in_window_mmx /* if (write >= nbytes) */ cannam@128: cannam@128: addl wsize(%esp), from_r cannam@128: addl write_r, from_r cannam@128: subl nbytes_r, from_r /* from += wsize + write - nbytes */ cannam@128: subl write_r, nbytes_r /* nbytes -= write */ cannam@128: #undef write_r cannam@128: cannam@128: cmpl nbytes_r, len_r cannam@128: jbe .L_do_copy1_mmx /* if (nbytes >= len) */ cannam@128: cannam@128: subl nbytes_r, len_r /* len -= nbytes */ cannam@128: rep movsb cannam@128: movl window(%esp), from_r /* from = window */ cannam@128: movl write(%esp), nbytes_r /* nbytes = write */ cannam@128: cmpl nbytes_r, len_r cannam@128: jbe .L_do_copy1_mmx /* if (nbytes >= len) */ cannam@128: cannam@128: subl nbytes_r, len_r /* len -= nbytes */ cannam@128: rep movsb cannam@128: movl out_r, from_r cannam@128: subl dist_r, from_r /* from = out - dist */ cannam@128: jmp .L_do_copy1_mmx cannam@128: cannam@128: .L_contiguous_in_window_mmx: cannam@128: #define write_r %eax cannam@128: addl write_r, from_r cannam@128: subl nbytes_r, from_r /* from += write - nbytes */ cannam@128: #undef write_r cannam@128: cannam@128: cmpl nbytes_r, len_r cannam@128: jbe .L_do_copy1_mmx /* if (nbytes >= len) */ cannam@128: cannam@128: subl nbytes_r, len_r /* len -= nbytes */ cannam@128: rep movsb cannam@128: movl out_r, from_r cannam@128: subl dist_r, from_r /* from = out - dist */ cannam@128: cannam@128: .L_do_copy1_mmx: cannam@128: #undef nbytes_r cannam@128: #define in_r %esi cannam@128: movl len_r, %ecx cannam@128: rep movsb cannam@128: cannam@128: movl in(%esp), in_r /* move in back to %esi, toss from */ cannam@128: movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */ cannam@128: jmp .L_while_test_mmx cannam@128: cannam@128: #undef hold_r cannam@128: #undef bitslong_r cannam@128: cannam@128: #endif /* USE_MMX || RUN_TIME_MMX */ cannam@128: cannam@128: cannam@128: /*** USE_MMX, NO_MMX, and RUNTIME_MMX from here on ***/ cannam@128: cannam@128: .L_invalid_distance_code: cannam@128: /* else { cannam@128: * strm->msg = "invalid distance code"; cannam@128: * state->mode = BAD; cannam@128: * } cannam@128: */ cannam@128: movl $.L_invalid_distance_code_msg, %ecx cannam@128: movl $INFLATE_MODE_BAD, %edx cannam@128: jmp .L_update_stream_state cannam@128: cannam@128: .L_test_for_end_of_block: cannam@128: /* else if (op & 32) { cannam@128: * state->mode = TYPE; cannam@128: * break; cannam@128: * } cannam@128: */ cannam@128: testb $32, %al cannam@128: jz .L_invalid_literal_length_code /* if ((op & 32) == 0) */ cannam@128: cannam@128: movl $0, %ecx cannam@128: movl $INFLATE_MODE_TYPE, %edx cannam@128: jmp .L_update_stream_state cannam@128: cannam@128: .L_invalid_literal_length_code: cannam@128: /* else { cannam@128: * strm->msg = "invalid literal/length code"; cannam@128: * state->mode = BAD; cannam@128: * } cannam@128: */ cannam@128: movl $.L_invalid_literal_length_code_msg, %ecx cannam@128: movl $INFLATE_MODE_BAD, %edx cannam@128: jmp .L_update_stream_state cannam@128: cannam@128: .L_invalid_distance_too_far: cannam@128: /* strm->msg = "invalid distance too far back"; cannam@128: * state->mode = BAD; cannam@128: */ cannam@128: movl in(%esp), in_r /* from_r has in's reg, put in back */ cannam@128: movl $.L_invalid_distance_too_far_msg, %ecx cannam@128: movl $INFLATE_MODE_BAD, %edx cannam@128: jmp .L_update_stream_state cannam@128: cannam@128: .L_update_stream_state: cannam@128: /* set strm->msg = %ecx, strm->state->mode = %edx */ cannam@128: movl strm_sp(%esp), %eax cannam@128: testl %ecx, %ecx /* if (msg != NULL) */ cannam@128: jz .L_skip_msg cannam@128: movl %ecx, msg_strm(%eax) /* strm->msg = msg */ cannam@128: .L_skip_msg: cannam@128: movl state_strm(%eax), %eax /* state = strm->state */ cannam@128: movl %edx, mode_state(%eax) /* state->mode = edx (BAD | TYPE) */ cannam@128: jmp .L_break_loop cannam@128: cannam@128: .align 32,0x90 cannam@128: .L_break_loop: cannam@128: cannam@128: /* cannam@128: * Regs: cannam@128: * cannam@128: * bits = %ebp when mmx, and in %ebx when non-mmx cannam@128: * hold = %hold_mm when mmx, and in %ebp when non-mmx cannam@128: * in = %esi cannam@128: * out = %edi cannam@128: */ cannam@128: cannam@128: #if defined( USE_MMX ) || defined( RUN_TIME_MMX ) cannam@128: cannam@128: #if defined( RUN_TIME_MMX ) cannam@128: cannam@128: cmpl $DO_USE_MMX, inflate_fast_use_mmx cannam@128: jne .L_update_next_in cannam@128: cannam@128: #endif /* RUN_TIME_MMX */ cannam@128: cannam@128: movl %ebp, %ebx cannam@128: cannam@128: .L_update_next_in: cannam@128: cannam@128: #endif cannam@128: cannam@128: #define strm_r %eax cannam@128: #define state_r %edx cannam@128: cannam@128: /* len = bits >> 3; cannam@128: * in -= len; cannam@128: * bits -= len << 3; cannam@128: * hold &= (1U << bits) - 1; cannam@128: * state->hold = hold; cannam@128: * state->bits = bits; cannam@128: * strm->next_in = in; cannam@128: * strm->next_out = out; cannam@128: */ cannam@128: movl strm_sp(%esp), strm_r cannam@128: movl %ebx, %ecx cannam@128: movl state_strm(strm_r), state_r cannam@128: shrl $3, %ecx cannam@128: subl %ecx, in_r cannam@128: shll $3, %ecx cannam@128: subl %ecx, %ebx cannam@128: movl out_r, next_out_strm(strm_r) cannam@128: movl %ebx, bits_state(state_r) cannam@128: movl %ebx, %ecx cannam@128: cannam@128: leal buf(%esp), %ebx cannam@128: cmpl %ebx, last(%esp) cannam@128: jne .L_buf_not_used /* if buf != last */ cannam@128: cannam@128: subl %ebx, in_r /* in -= buf */ cannam@128: movl next_in_strm(strm_r), %ebx cannam@128: movl %ebx, last(%esp) /* last = strm->next_in */ cannam@128: addl %ebx, in_r /* in += strm->next_in */ cannam@128: movl avail_in_strm(strm_r), %ebx cannam@128: subl $11, %ebx cannam@128: addl %ebx, last(%esp) /* last = &strm->next_in[ avail_in - 11 ] */ cannam@128: cannam@128: .L_buf_not_used: cannam@128: movl in_r, next_in_strm(strm_r) cannam@128: cannam@128: movl $1, %ebx cannam@128: shll %cl, %ebx cannam@128: decl %ebx cannam@128: cannam@128: #if defined( USE_MMX ) || defined( RUN_TIME_MMX ) cannam@128: cannam@128: #if defined( RUN_TIME_MMX ) cannam@128: cannam@128: cmpl $DO_USE_MMX, inflate_fast_use_mmx cannam@128: jne .L_update_hold cannam@128: cannam@128: #endif /* RUN_TIME_MMX */ cannam@128: cannam@128: psrlq used_mm, hold_mm /* hold_mm >>= last bit length */ cannam@128: movd hold_mm, %ebp cannam@128: cannam@128: emms cannam@128: cannam@128: .L_update_hold: cannam@128: cannam@128: #endif /* USE_MMX || RUN_TIME_MMX */ cannam@128: cannam@128: andl %ebx, %ebp cannam@128: movl %ebp, hold_state(state_r) cannam@128: cannam@128: #define last_r %ebx cannam@128: cannam@128: /* strm->avail_in = in < last ? 11 + (last - in) : 11 - (in - last) */ cannam@128: movl last(%esp), last_r cannam@128: cmpl in_r, last_r cannam@128: jbe .L_last_is_smaller /* if (in >= last) */ cannam@128: cannam@128: subl in_r, last_r /* last -= in */ cannam@128: addl $11, last_r /* last += 11 */ cannam@128: movl last_r, avail_in_strm(strm_r) cannam@128: jmp .L_fixup_out cannam@128: .L_last_is_smaller: cannam@128: subl last_r, in_r /* in -= last */ cannam@128: negl in_r /* in = -in */ cannam@128: addl $11, in_r /* in += 11 */ cannam@128: movl in_r, avail_in_strm(strm_r) cannam@128: cannam@128: #undef last_r cannam@128: #define end_r %ebx cannam@128: cannam@128: .L_fixup_out: cannam@128: /* strm->avail_out = out < end ? 257 + (end - out) : 257 - (out - end)*/ cannam@128: movl end(%esp), end_r cannam@128: cmpl out_r, end_r cannam@128: jbe .L_end_is_smaller /* if (out >= end) */ cannam@128: cannam@128: subl out_r, end_r /* end -= out */ cannam@128: addl $257, end_r /* end += 257 */ cannam@128: movl end_r, avail_out_strm(strm_r) cannam@128: jmp .L_done cannam@128: .L_end_is_smaller: cannam@128: subl end_r, out_r /* out -= end */ cannam@128: negl out_r /* out = -out */ cannam@128: addl $257, out_r /* out += 257 */ cannam@128: movl out_r, avail_out_strm(strm_r) cannam@128: cannam@128: #undef end_r cannam@128: #undef strm_r cannam@128: #undef state_r cannam@128: cannam@128: .L_done: cannam@128: addl $local_var_size, %esp cannam@128: popf cannam@128: popl %ebx cannam@128: popl %ebp cannam@128: popl %esi cannam@128: popl %edi cannam@128: ret cannam@128: cannam@128: #if defined( GAS_ELF ) cannam@128: /* elf info */ cannam@128: .type inflate_fast,@function cannam@128: .size inflate_fast,.-inflate_fast cannam@128: #endif