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-rw-r--r--zlib/contrib/inflate86/inffas86.c798
1 files changed, 586 insertions, 212 deletions
diff --git a/zlib/contrib/inflate86/inffas86.c b/zlib/contrib/inflate86/inffas86.c
index 4534693a47d..6da76358ccb 100644
--- a/zlib/contrib/inflate86/inffas86.c
+++ b/zlib/contrib/inflate86/inffas86.c
@@ -7,6 +7,15 @@
* Copyright (C) 2003 Chris Anderson <christop@charm.net>
* Please use the copyright conditions above.
*
+ * Dec-29-2003 -- I added AMD64 inflate asm support. This version is also
+ * slightly quicker on x86 systems because, instead of using rep movsb to copy
+ * data, it uses rep movsw, which moves data in 2-byte chunks instead of single
+ * bytes. I've tested the AMD64 code on a Fedora Core 1 + the x86_64 updates
+ * from http://fedora.linux.duke.edu/fc1_x86_64
+ * which is running on an Athlon 64 3000+ / Gigabyte GA-K8VT800M system with
+ * 1GB ram. The 64-bit version is about 4% faster than the 32-bit version,
+ * when decompressing mozilla-source-1.3.tar.gz.
+ *
* Mar-13-2003 -- Most of this is derived from inffast.S which is derived from
* the gcc -S output of zlib-1.2.0/inffast.c. Zlib-1.2.0 is in beta release at
* the moment. I have successfully compiled and tested this code with gcc2.96,
@@ -65,33 +74,44 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
{
struct inflate_state FAR *state;
struct inffast_ar {
- void *esp; /* esp save */
- unsigned char FAR *in; /* local strm->next_in */
- unsigned char FAR *last; /* while in < last, enough input available */
- unsigned char FAR *out; /* local strm->next_out */
- unsigned char FAR *beg; /* inflate()'s initial strm->next_out */
- unsigned char FAR *end; /* while out < end, enough space available */
- unsigned wsize; /* window size or zero if not using window */
- unsigned write; /* window write index */
- unsigned char FAR *window; /* allocated sliding window, if wsize != 0 */
- unsigned long hold; /* local strm->hold */
- unsigned bits; /* local strm->bits */
- code const FAR *lcode; /* local strm->lencode */
- code const FAR *dcode; /* local strm->distcode */
- unsigned lmask; /* mask for first level of length codes */
- unsigned dmask; /* mask for first level of distance codes */
- unsigned len; /* match length, unused bytes */
- unsigned dist; /* match distance */
- unsigned status; /* this is set when state changes */
+/* 64 32 x86 x86_64 */
+/* ar offset register */
+/* 0 0 */ void *esp; /* esp save */
+/* 8 4 */ void *ebp; /* ebp save */
+/* 16 8 */ unsigned char FAR *in; /* esi rsi local strm->next_in */
+/* 24 12 */ unsigned char FAR *last; /* r9 while in < last */
+/* 32 16 */ unsigned char FAR *out; /* edi rdi local strm->next_out */
+/* 40 20 */ unsigned char FAR *beg; /* inflate()'s init next_out */
+/* 48 24 */ unsigned char FAR *end; /* r10 while out < end */
+/* 56 28 */ unsigned char FAR *window;/* size of window, wsize!=0 */
+/* 64 32 */ code const FAR *lcode; /* ebp rbp local strm->lencode */
+/* 72 36 */ code const FAR *dcode; /* r11 local strm->distcode */
+/* 80 40 */ unsigned long hold; /* edx rdx local strm->hold */
+/* 88 44 */ unsigned bits; /* ebx rbx local strm->bits */
+/* 92 48 */ unsigned wsize; /* window size */
+/* 96 52 */ unsigned write; /* window write index */
+/*100 56 */ unsigned lmask; /* r12 mask for lcode */
+/*104 60 */ unsigned dmask; /* r13 mask for dcode */
+/*108 64 */ unsigned len; /* r14 match length */
+/*112 68 */ unsigned dist; /* r15 match distance */
+/*116 72 */ unsigned status; /* set when state chng*/
} ar;
+#if defined( __GNUC__ ) && defined( __amd64__ ) && ! defined( __i386 )
+#define PAD_AVAIL_IN 6
+#define PAD_AVAIL_OUT 258
+#else
+#define PAD_AVAIL_IN 5
+#define PAD_AVAIL_OUT 257
+#endif
+
/* copy state to local variables */
state = (struct inflate_state FAR *)strm->state;
ar.in = strm->next_in;
- ar.last = ar.in + (strm->avail_in - 5);
+ ar.last = ar.in + (strm->avail_in - PAD_AVAIL_IN);
ar.out = strm->next_out;
ar.beg = ar.out - (start - strm->avail_out);
- ar.end = ar.out + (strm->avail_out - 257);
+ ar.end = ar.out + (strm->avail_out - PAD_AVAIL_OUT);
ar.wsize = state->wsize;
ar.write = state->write;
ar.window = state->window;
@@ -105,32 +125,368 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
/* decode literals and length/distances until end-of-block or not enough
input data or output space */
- /* align in on 2 byte boundary */
- if (((unsigned long)(void *)ar.in & 0x1) != 0) {
+ /* align in on 1/2 hold size boundary */
+ while (((unsigned long)(void *)ar.in & (sizeof(ar.hold) / 2 - 1)) != 0) {
ar.hold += (unsigned long)*ar.in++ << ar.bits;
ar.bits += 8;
}
-#if defined( __GNUC__ ) || defined( __ICC )
+#if defined( __GNUC__ ) && defined( __amd64__ ) && ! defined( __i386 )
+ __asm__ __volatile__ (
+" leaq %0, %%rax\n"
+" movq %%rbp, 8(%%rax)\n" /* save regs rbp and rsp */
+" movq %%rsp, (%%rax)\n"
+" movq %%rax, %%rsp\n" /* make rsp point to &ar */
+" movq 16(%%rsp), %%rsi\n" /* rsi = in */
+" movq 32(%%rsp), %%rdi\n" /* rdi = out */
+" movq 24(%%rsp), %%r9\n" /* r9 = last */
+" movq 48(%%rsp), %%r10\n" /* r10 = end */
+" movq 64(%%rsp), %%rbp\n" /* rbp = lcode */
+" movq 72(%%rsp), %%r11\n" /* r11 = dcode */
+" movq 80(%%rsp), %%rdx\n" /* rdx = hold */
+" movl 88(%%rsp), %%ebx\n" /* ebx = bits */
+" movl 100(%%rsp), %%r12d\n" /* r12d = lmask */
+" movl 104(%%rsp), %%r13d\n" /* r13d = dmask */
+ /* r14d = len */
+ /* r15d = dist */
+" cld\n"
+" cmpq %%rdi, %%r10\n"
+" je .L_one_time\n" /* if only one decode left */
+" cmpq %%rsi, %%r9\n"
+" je .L_one_time\n"
+" jmp .L_do_loop\n"
+
+".L_one_time:\n"
+" movq %%r12, %%r8\n" /* r8 = lmask */
+" cmpb $32, %%bl\n"
+" ja .L_get_length_code_one_time\n"
+
+" lodsl\n" /* eax = *(uint *)in++ */
+" movb %%bl, %%cl\n" /* cl = bits, needs it for shifting */
+" addb $32, %%bl\n" /* bits += 32 */
+" shlq %%cl, %%rax\n"
+" orq %%rax, %%rdx\n" /* hold |= *((uint *)in)++ << bits */
+" jmp .L_get_length_code_one_time\n"
+
+".align 32,0x90\n"
+".L_while_test:\n"
+" cmpq %%rdi, %%r10\n"
+" jbe .L_break_loop\n"
+" cmpq %%rsi, %%r9\n"
+" jbe .L_break_loop\n"
+
+".L_do_loop:\n"
+" movq %%r12, %%r8\n" /* r8 = lmask */
+" cmpb $32, %%bl\n"
+" ja .L_get_length_code\n" /* if (32 < bits) */
+
+" lodsl\n" /* eax = *(uint *)in++ */
+" movb %%bl, %%cl\n" /* cl = bits, needs it for shifting */
+" addb $32, %%bl\n" /* bits += 32 */
+" shlq %%cl, %%rax\n"
+" orq %%rax, %%rdx\n" /* hold |= *((uint *)in)++ << bits */
+
+".L_get_length_code:\n"
+" andq %%rdx, %%r8\n" /* r8 &= hold */
+" movl (%%rbp,%%r8,4), %%eax\n" /* eax = lcode[hold & lmask] */
+
+" movb %%ah, %%cl\n" /* cl = this.bits */
+" subb %%ah, %%bl\n" /* bits -= this.bits */
+" shrq %%cl, %%rdx\n" /* hold >>= this.bits */
+
+" testb %%al, %%al\n"
+" jnz .L_test_for_length_base\n" /* if (op != 0) 45.7% */
+
+" movq %%r12, %%r8\n" /* r8 = lmask */
+" shrl $16, %%eax\n" /* output this.val char */
+" stosb\n"
+
+".L_get_length_code_one_time:\n"
+" andq %%rdx, %%r8\n" /* r8 &= hold */
+" movl (%%rbp,%%r8,4), %%eax\n" /* eax = lcode[hold & lmask] */
+
+".L_dolen:\n"
+" movb %%ah, %%cl\n" /* cl = this.bits */
+" subb %%ah, %%bl\n" /* bits -= this.bits */
+" shrq %%cl, %%rdx\n" /* hold >>= this.bits */
+
+" testb %%al, %%al\n"
+" jnz .L_test_for_length_base\n" /* if (op != 0) 45.7% */
+
+" shrl $16, %%eax\n" /* output this.val char */
+" stosb\n"
+" jmp .L_while_test\n"
+
+".align 32,0x90\n"
+".L_test_for_length_base:\n"
+" movl %%eax, %%r14d\n" /* len = this */
+" shrl $16, %%r14d\n" /* len = this.val */
+" movb %%al, %%cl\n"
+
+" testb $16, %%al\n"
+" jz .L_test_for_second_level_length\n" /* if ((op & 16) == 0) 8% */
+" andb $15, %%cl\n" /* op &= 15 */
+" jz .L_decode_distance\n" /* if (!op) */
+
+".L_add_bits_to_len:\n"
+" subb %%cl, %%bl\n"
+" xorl %%eax, %%eax\n"
+" incl %%eax\n"
+" shll %%cl, %%eax\n"
+" decl %%eax\n"
+" andl %%edx, %%eax\n" /* eax &= hold */
+" shrq %%cl, %%rdx\n"
+" addl %%eax, %%r14d\n" /* len += hold & mask[op] */
+
+".L_decode_distance:\n"
+" movq %%r13, %%r8\n" /* r8 = dmask */
+" cmpb $32, %%bl\n"
+" ja .L_get_distance_code\n" /* if (32 < bits) */
+
+" lodsl\n" /* eax = *(uint *)in++ */
+" movb %%bl, %%cl\n" /* cl = bits, needs it for shifting */
+" addb $32, %%bl\n" /* bits += 32 */
+" shlq %%cl, %%rax\n"
+" orq %%rax, %%rdx\n" /* hold |= *((uint *)in)++ << bits */
+
+".L_get_distance_code:\n"
+" andq %%rdx, %%r8\n" /* r8 &= hold */
+" movl (%%r11,%%r8,4), %%eax\n" /* eax = dcode[hold & dmask] */
+
+".L_dodist:\n"
+" movl %%eax, %%r15d\n" /* dist = this */
+" shrl $16, %%r15d\n" /* dist = this.val */
+" movb %%ah, %%cl\n"
+" subb %%ah, %%bl\n" /* bits -= this.bits */
+" shrq %%cl, %%rdx\n" /* hold >>= this.bits */
+" movb %%al, %%cl\n" /* cl = this.op */
+
+" testb $16, %%al\n" /* if ((op & 16) == 0) */
+" jz .L_test_for_second_level_dist\n"
+" andb $15, %%cl\n" /* op &= 15 */
+" jz .L_check_dist_one\n"
+
+".L_add_bits_to_dist:\n"
+" subb %%cl, %%bl\n"
+" xorl %%eax, %%eax\n"
+" incl %%eax\n"
+" shll %%cl, %%eax\n"
+" decl %%eax\n" /* (1 << op) - 1 */
+" andl %%edx, %%eax\n" /* eax &= hold */
+" shrq %%cl, %%rdx\n"
+" addl %%eax, %%r15d\n" /* dist += hold & ((1 << op) - 1) */
+
+".L_check_window:\n"
+" movq %%rsi, %%r8\n" /* save in so from can use it's reg */
+" movq %%rdi, %%rax\n"
+" subq 40(%%rsp), %%rax\n" /* nbytes = out - beg */
+
+" cmpl %%r15d, %%eax\n"
+" jb .L_clip_window\n" /* if (dist > nbytes) 4.2% */
+
+" movl %%r14d, %%ecx\n" /* ecx = len */
+" movq %%rdi, %%rsi\n"
+" subq %%r15, %%rsi\n" /* from = out - dist */
+
+" sarl %%ecx\n"
+" jnc .L_copy_two\n" /* if len % 2 == 0 */
+
+" rep movsw\n"
+" movb (%%rsi), %%al\n"
+" movb %%al, (%%rdi)\n"
+" incq %%rdi\n"
+
+" movq %%r8, %%rsi\n" /* move in back to %rsi, toss from */
+" jmp .L_while_test\n"
+
+".L_copy_two:\n"
+" rep movsw\n"
+" movq %%r8, %%rsi\n" /* move in back to %rsi, toss from */
+" jmp .L_while_test\n"
+
+".align 32,0x90\n"
+".L_check_dist_one:\n"
+" cmpl $1, %%r15d\n" /* if dist 1, is a memset */
+" jne .L_check_window\n"
+" cmpq %%rdi, 40(%%rsp)\n" /* if out == beg, outside window */
+" je .L_check_window\n"
+
+" movl %%r14d, %%ecx\n" /* ecx = len */
+" movb -1(%%rdi), %%al\n"
+" movb %%al, %%ah\n"
+
+" sarl %%ecx\n"
+" jnc .L_set_two\n"
+" movb %%al, (%%rdi)\n"
+" incq %%rdi\n"
+
+".L_set_two:\n"
+" rep stosw\n"
+" jmp .L_while_test\n"
+
+".align 32,0x90\n"
+".L_test_for_second_level_length:\n"
+" testb $64, %%al\n"
+" jnz .L_test_for_end_of_block\n" /* if ((op & 64) != 0) */
+
+" xorl %%eax, %%eax\n"
+" incl %%eax\n"
+" shll %%cl, %%eax\n"
+" decl %%eax\n"
+" andl %%edx, %%eax\n" /* eax &= hold */
+" addl %%r14d, %%eax\n" /* eax += len */
+" movl (%%rbp,%%rax,4), %%eax\n" /* eax = lcode[val+(hold&mask[op])]*/
+" jmp .L_dolen\n"
+
+".align 32,0x90\n"
+".L_test_for_second_level_dist:\n"
+" testb $64, %%al\n"
+" jnz .L_invalid_distance_code\n" /* if ((op & 64) != 0) */
+
+" xorl %%eax, %%eax\n"
+" incl %%eax\n"
+" shll %%cl, %%eax\n"
+" decl %%eax\n"
+" andl %%edx, %%eax\n" /* eax &= hold */
+" addl %%r15d, %%eax\n" /* eax += dist */
+" movl (%%r11,%%rax,4), %%eax\n" /* eax = dcode[val+(hold&mask[op])]*/
+" jmp .L_dodist\n"
+
+".align 32,0x90\n"
+".L_clip_window:\n"
+" movl %%eax, %%ecx\n" /* ecx = nbytes */
+" movl 92(%%rsp), %%eax\n" /* eax = wsize, prepare for dist cmp */
+" negl %%ecx\n" /* nbytes = -nbytes */
+
+" cmpl %%r15d, %%eax\n"
+" jb .L_invalid_distance_too_far\n" /* if (dist > wsize) */
+
+" addl %%r15d, %%ecx\n" /* nbytes = dist - nbytes */
+" cmpl $0, 96(%%rsp)\n"
+" jne .L_wrap_around_window\n" /* if (write != 0) */
+
+" movq 56(%%rsp), %%rsi\n" /* from = window */
+" subl %%ecx, %%eax\n" /* eax -= nbytes */
+" addq %%rax, %%rsi\n" /* from += wsize - nbytes */
+
+" movl %%r14d, %%eax\n" /* eax = len */
+" cmpl %%ecx, %%r14d\n"
+" jbe .L_do_copy\n" /* if (nbytes >= len) */
+
+" subl %%ecx, %%eax\n" /* eax -= nbytes */
+" rep movsb\n"
+" movq %%rdi, %%rsi\n"
+" subq %%r15, %%rsi\n" /* from = &out[ -dist ] */
+" jmp .L_do_copy\n"
+
+".align 32,0x90\n"
+".L_wrap_around_window:\n"
+" movl 96(%%rsp), %%eax\n" /* eax = write */
+" cmpl %%eax, %%ecx\n"
+" jbe .L_contiguous_in_window\n" /* if (write >= nbytes) */
+
+" movl 92(%%rsp), %%esi\n" /* from = wsize */
+" addq 56(%%rsp), %%rsi\n" /* from += window */
+" addq %%rax, %%rsi\n" /* from += write */
+" subq %%rcx, %%rsi\n" /* from -= nbytes */
+" subl %%eax, %%ecx\n" /* nbytes -= write */
+
+" movl %%r14d, %%eax\n" /* eax = len */
+" cmpl %%ecx, %%eax\n"
+" jbe .L_do_copy\n" /* if (nbytes >= len) */
+
+" subl %%ecx, %%eax\n" /* len -= nbytes */
+" rep movsb\n"
+" movq 56(%%rsp), %%rsi\n" /* from = window */
+" movl 96(%%rsp), %%ecx\n" /* nbytes = write */
+" cmpl %%ecx, %%eax\n"
+" jbe .L_do_copy\n" /* if (nbytes >= len) */
+
+" subl %%ecx, %%eax\n" /* len -= nbytes */
+" rep movsb\n"
+" movq %%rdi, %%rsi\n"
+" subq %%r15, %%rsi\n" /* from = out - dist */
+" jmp .L_do_copy\n"
+
+".align 32,0x90\n"
+".L_contiguous_in_window:\n"
+" movq 56(%%rsp), %%rsi\n" /* rsi = window */
+" addq %%rax, %%rsi\n"
+" subq %%rcx, %%rsi\n" /* from += write - nbytes */
+
+" movl %%r14d, %%eax\n" /* eax = len */
+" cmpl %%ecx, %%eax\n"
+" jbe .L_do_copy\n" /* if (nbytes >= len) */
+
+" subl %%ecx, %%eax\n" /* len -= nbytes */
+" rep movsb\n"
+" movq %%rdi, %%rsi\n"
+" subq %%r15, %%rsi\n" /* from = out - dist */
+" jmp .L_do_copy\n" /* if (nbytes >= len) */
+
+".align 32,0x90\n"
+".L_do_copy:\n"
+" movl %%eax, %%ecx\n" /* ecx = len */
+" rep movsb\n"
+
+" movq %%r8, %%rsi\n" /* move in back to %esi, toss from */
+" jmp .L_while_test\n"
+
+".L_test_for_end_of_block:\n"
+" testb $32, %%al\n"
+" jz .L_invalid_literal_length_code\n"
+" movl $1, 116(%%rsp)\n"
+" jmp .L_break_loop_with_status\n"
+
+".L_invalid_literal_length_code:\n"
+" movl $2, 116(%%rsp)\n"
+" jmp .L_break_loop_with_status\n"
+
+".L_invalid_distance_code:\n"
+" movl $3, 116(%%rsp)\n"
+" jmp .L_break_loop_with_status\n"
+
+".L_invalid_distance_too_far:\n"
+" movl $4, 116(%%rsp)\n"
+" jmp .L_break_loop_with_status\n"
+
+".L_break_loop:\n"
+" movl $0, 116(%%rsp)\n"
+
+".L_break_loop_with_status:\n"
+/* put in, out, bits, and hold back into ar and pop esp */
+" movq %%rsi, 16(%%rsp)\n" /* in */
+" movq %%rdi, 32(%%rsp)\n" /* out */
+" movl %%ebx, 88(%%rsp)\n" /* bits */
+" movq %%rdx, 80(%%rsp)\n" /* hold */
+" movq (%%rsp), %%rax\n" /* restore rbp and rsp */
+" movq 8(%%rsp), %%rbp\n"
+" movq %%rax, %%rsp\n"
+ :
+ : "m" (ar)
+ : "memory", "%rax", "%rbx", "%rcx", "%rdx", "%rsi", "%rdi",
+ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15"
+ );
+#elif ( defined( __GNUC__ ) || defined( __ICC ) ) && defined( __i386 )
__asm__ __volatile__ (
" leal %0, %%eax\n"
-" pushf\n"
-" pushl %%ebp\n"
-" movl %%esp, (%%eax)\n"
+" movl %%esp, (%%eax)\n" /* save esp, ebp */
+" movl %%ebp, 4(%%eax)\n"
" movl %%eax, %%esp\n"
-" movl 4(%%esp), %%esi\n" /* esi = in */
-" movl 12(%%esp), %%edi\n" /* edi = out */
-" movl 36(%%esp), %%edx\n" /* edx = hold */
-" movl 40(%%esp), %%ebx\n" /* ebx = bits */
-" movl 44(%%esp), %%ebp\n" /* ebp = lcode */
+" movl 8(%%esp), %%esi\n" /* esi = in */
+" movl 16(%%esp), %%edi\n" /* edi = out */
+" movl 40(%%esp), %%edx\n" /* edx = hold */
+" movl 44(%%esp), %%ebx\n" /* ebx = bits */
+" movl 32(%%esp), %%ebp\n" /* ebp = lcode */
" cld\n"
" jmp .L_do_loop\n"
+".align 32,0x90\n"
".L_while_test:\n"
-" cmpl %%edi, 20(%%esp)\n"
+" cmpl %%edi, 24(%%esp)\n" /* out < end */
" jbe .L_break_loop\n"
-" cmpl %%esi, 8(%%esp)\n"
+" cmpl %%esi, 12(%%esp)\n" /* in < last */
" jbe .L_break_loop\n"
".L_do_loop:\n"
@@ -145,7 +501,7 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
" orl %%eax, %%edx\n" /* hold |= *((ushort *)in)++ << bits */
".L_get_length_code:\n"
-" movl 52(%%esp), %%eax\n" /* eax = lmask */
+" movl 56(%%esp), %%eax\n" /* eax = lmask */
" andl %%edx, %%eax\n" /* eax &= hold */
" movl (%%ebp,%%eax,4), %%eax\n" /* eax = lcode[hold & lmask] */
@@ -161,10 +517,11 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
" stosb\n"
" jmp .L_while_test\n"
+".align 32,0x90\n"
".L_test_for_length_base:\n"
" movl %%eax, %%ecx\n" /* len = this */
" shrl $16, %%ecx\n" /* len = this.val */
-" movl %%ecx, 60(%%esp)\n" /* len = this */
+" movl %%ecx, 64(%%esp)\n" /* save len */
" movb %%al, %%cl\n"
" testb $16, %%al\n"
@@ -184,13 +541,14 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
" movb %%ch, %%cl\n" /* move op back to ecx */
".L_add_bits_to_len:\n"
-" movl $1, %%eax\n"
+" subb %%cl, %%bl\n"
+" xorl %%eax, %%eax\n"
+" incl %%eax\n"
" shll %%cl, %%eax\n"
" decl %%eax\n"
-" subb %%cl, %%bl\n"
" andl %%edx, %%eax\n" /* eax &= hold */
" shrl %%cl, %%edx\n"
-" addl %%eax, 60(%%esp)\n" /* len += hold & mask[op] */
+" addl %%eax, 64(%%esp)\n" /* len += hold & mask[op] */
".L_decode_distance:\n"
" cmpb $15, %%bl\n"
@@ -204,8 +562,8 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
" orl %%eax, %%edx\n" /* hold |= *((ushort *)in)++ << bits */
".L_get_distance_code:\n"
-" movl 56(%%esp), %%eax\n" /* eax = dmask */
-" movl 48(%%esp), %%ecx\n" /* ecx = dcode */
+" movl 60(%%esp), %%eax\n" /* eax = dmask */
+" movl 36(%%esp), %%ecx\n" /* ecx = dcode */
" andl %%edx, %%eax\n" /* eax &= hold */
" movl (%%ecx,%%eax,4), %%eax\n"/* eax = dcode[hold & dmask] */
@@ -234,223 +592,228 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
" movb %%ch, %%cl\n" /* move op back to ecx */
".L_add_bits_to_dist:\n"
-" movl $1, %%eax\n"
+" subb %%cl, %%bl\n"
+" xorl %%eax, %%eax\n"
+" incl %%eax\n"
" shll %%cl, %%eax\n"
" decl %%eax\n" /* (1 << op) - 1 */
-" subb %%cl, %%bl\n"
" andl %%edx, %%eax\n" /* eax &= hold */
" shrl %%cl, %%edx\n"
" addl %%eax, %%ebp\n" /* dist += hold & ((1 << op) - 1) */
".L_check_window:\n"
-" movl %%esi, 4(%%esp)\n" /* save in so from can use it's reg */
+" movl %%esi, 8(%%esp)\n" /* save in so from can use it's reg */
" movl %%edi, %%eax\n"
-" subl 16(%%esp), %%eax\n" /* nbytes = out - beg */
+" subl 20(%%esp), %%eax\n" /* nbytes = out - beg */
" cmpl %%ebp, %%eax\n"
" jb .L_clip_window\n" /* if (dist > nbytes) 4.2% */
-" movl 60(%%esp), %%ecx\n"
+" movl 64(%%esp), %%ecx\n" /* ecx = len */
" movl %%edi, %%esi\n"
" subl %%ebp, %%esi\n" /* from = out - dist */
-" subl $3, %%ecx\n" /* copy from to out */
+" sarl %%ecx\n"
+" jnc .L_copy_two\n" /* if len % 2 == 0 */
+
+" rep movsw\n"
" movb (%%esi), %%al\n"
" movb %%al, (%%edi)\n"
-" movb 1(%%esi), %%al\n"
-" movb 2(%%esi), %%ah\n"
-" addl $3, %%esi\n"
-" movb %%al, 1(%%edi)\n"
-" movb %%ah, 2(%%edi)\n"
-" addl $3, %%edi\n"
-" rep movsb\n"
+" incl %%edi\n"
-" movl 4(%%esp), %%esi\n" /* move in back to %esi, toss from */
-" movl 44(%%esp), %%ebp\n" /* ebp = lcode */
+" movl 8(%%esp), %%esi\n" /* move in back to %esi, toss from */
+" movl 32(%%esp), %%ebp\n" /* ebp = lcode */
" jmp .L_while_test\n"
+".L_copy_two:\n"
+" rep movsw\n"
+" movl 8(%%esp), %%esi\n" /* move in back to %esi, toss from */
+" movl 32(%%esp), %%ebp\n" /* ebp = lcode */
+" jmp .L_while_test\n"
+
+".align 32,0x90\n"
".L_check_dist_one:\n"
" cmpl $1, %%ebp\n" /* if dist 1, is a memset */
" jne .L_check_window\n"
-" cmpl %%edi, 16(%%esp)\n"
-" je .L_check_window\n"
+" cmpl %%edi, 20(%%esp)\n"
+" je .L_check_window\n" /* out == beg, if outside window */
+
+" movl 64(%%esp), %%ecx\n" /* ecx = len */
+" movb -1(%%edi), %%al\n"
+" movb %%al, %%ah\n"
+
+" sarl %%ecx\n"
+" jnc .L_set_two\n"
+" movb %%al, (%%edi)\n"
+" incl %%edi\n"
-" decl %%edi\n"
-" movl 60(%%esp), %%ecx\n"
-" movb (%%edi), %%al\n"
-" subl $3, %%ecx\n"
-
-" movb %%al, 1(%%edi)\n" /* memset out with from[-1] */
-" movb %%al, 2(%%edi)\n"
-" movb %%al, 3(%%edi)\n"
-" addl $4, %%edi\n"
-" rep stosb\n"
-" movl 44(%%esp), %%ebp\n" /* ebp = lcode */
+".L_set_two:\n"
+" rep stosw\n"
+" movl 32(%%esp), %%ebp\n" /* ebp = lcode */
" jmp .L_while_test\n"
+".align 32,0x90\n"
".L_test_for_second_level_length:\n"
" testb $64, %%al\n"
" jnz .L_test_for_end_of_block\n" /* if ((op & 64) != 0) */
-" movl $1, %%eax\n"
+" xorl %%eax, %%eax\n"
+" incl %%eax\n"
" shll %%cl, %%eax\n"
" decl %%eax\n"
" andl %%edx, %%eax\n" /* eax &= hold */
-" addl 60(%%esp), %%eax\n" /* eax += this.val */
+" addl 64(%%esp), %%eax\n" /* eax += len */
" movl (%%ebp,%%eax,4), %%eax\n" /* eax = lcode[val+(hold&mask[op])]*/
" jmp .L_dolen\n"
+".align 32,0x90\n"
".L_test_for_second_level_dist:\n"
" testb $64, %%al\n"
" jnz .L_invalid_distance_code\n" /* if ((op & 64) != 0) */
-" movl $1, %%eax\n"
+" xorl %%eax, %%eax\n"
+" incl %%eax\n"
" shll %%cl, %%eax\n"
" decl %%eax\n"
" andl %%edx, %%eax\n" /* eax &= hold */
-" addl %%ebp, %%eax\n" /* eax += this.val */
-" movl 48(%%esp), %%ecx\n" /* ecx = dcode */
+" addl %%ebp, %%eax\n" /* eax += dist */
+" movl 36(%%esp), %%ecx\n" /* ecx = dcode */
" movl (%%ecx,%%eax,4), %%eax\n" /* eax = dcode[val+(hold&mask[op])]*/
" jmp .L_dodist\n"
+".align 32,0x90\n"
".L_clip_window:\n"
" movl %%eax, %%ecx\n"
-" movl 24(%%esp), %%eax\n" /* prepare for dist compare */
+" movl 48(%%esp), %%eax\n" /* eax = wsize */
" negl %%ecx\n" /* nbytes = -nbytes */
-" movl 32(%%esp), %%esi\n" /* from = window */
+" movl 28(%%esp), %%esi\n" /* from = window */
" cmpl %%ebp, %%eax\n"
" jb .L_invalid_distance_too_far\n" /* if (dist > wsize) */
" addl %%ebp, %%ecx\n" /* nbytes = dist - nbytes */
-" cmpl $0, 28(%%esp)\n"
+" cmpl $0, 52(%%esp)\n"
" jne .L_wrap_around_window\n" /* if (write != 0) */
" subl %%ecx, %%eax\n"
" addl %%eax, %%esi\n" /* from += wsize - nbytes */
-" movl 60(%%esp), %%eax\n"
-" cmpl %%ecx, %%eax\n"
-" jbe .L_do_copy1\n" /* if (nbytes >= len) */
-
-" subl %%ecx, %%eax\n" /* len -= nbytes */
-" rep movsb\n"
-" movl %%edi, %%esi\n"
-" subl %%ebp, %%esi\n" /* from = out - dist */
-" jmp .L_do_copy1\n"
-
+" movl 64(%%esp), %%eax\n" /* eax = len */
" cmpl %%ecx, %%eax\n"
-" jbe .L_do_copy1\n" /* if (nbytes >= len) */
+" jbe .L_do_copy\n" /* if (nbytes >= len) */
" subl %%ecx, %%eax\n" /* len -= nbytes */
" rep movsb\n"
" movl %%edi, %%esi\n"
" subl %%ebp, %%esi\n" /* from = out - dist */
-" jmp .L_do_copy1\n"
+" jmp .L_do_copy\n"
+".align 32,0x90\n"
".L_wrap_around_window:\n"
-" movl 28(%%esp), %%eax\n"
+" movl 52(%%esp), %%eax\n" /* eax = write */
" cmpl %%eax, %%ecx\n"
" jbe .L_contiguous_in_window\n" /* if (write >= nbytes) */
-" addl 24(%%esp), %%esi\n"
-" addl %%eax, %%esi\n"
-" subl %%ecx, %%esi\n" /* from += wsize + write - nbytes */
+" addl 48(%%esp), %%esi\n" /* from += wsize */
+" addl %%eax, %%esi\n" /* from += write */
+" subl %%ecx, %%esi\n" /* from -= nbytes */
" subl %%eax, %%ecx\n" /* nbytes -= write */
-" movl 60(%%esp), %%eax\n"
+" movl 64(%%esp), %%eax\n" /* eax = len */
" cmpl %%ecx, %%eax\n"
-" jbe .L_do_copy1\n" /* if (nbytes >= len) */
+" jbe .L_do_copy\n" /* if (nbytes >= len) */
" subl %%ecx, %%eax\n" /* len -= nbytes */
" rep movsb\n"
-" movl 32(%%esp), %%esi\n" /* from = window */
-" movl 28(%%esp), %%ecx\n" /* nbytes = write */
+" movl 28(%%esp), %%esi\n" /* from = window */
+" movl 52(%%esp), %%ecx\n" /* nbytes = write */
" cmpl %%ecx, %%eax\n"
-" jbe .L_do_copy1\n" /* if (nbytes >= len) */
+" jbe .L_do_copy\n" /* if (nbytes >= len) */
" subl %%ecx, %%eax\n" /* len -= nbytes */
" rep movsb\n"
" movl %%edi, %%esi\n"
" subl %%ebp, %%esi\n" /* from = out - dist */
-" jmp .L_do_copy1\n"
+" jmp .L_do_copy\n"
+".align 32,0x90\n"
".L_contiguous_in_window:\n"
" addl %%eax, %%esi\n"
" subl %%ecx, %%esi\n" /* from += write - nbytes */
-" movl 60(%%esp), %%eax\n"
+" movl 64(%%esp), %%eax\n" /* eax = len */
" cmpl %%ecx, %%eax\n"
-" jbe .L_do_copy1\n" /* if (nbytes >= len) */
+" jbe .L_do_copy\n" /* if (nbytes >= len) */
" subl %%ecx, %%eax\n" /* len -= nbytes */
" rep movsb\n"
" movl %%edi, %%esi\n"
" subl %%ebp, %%esi\n" /* from = out - dist */
+" jmp .L_do_copy\n" /* if (nbytes >= len) */
-".L_do_copy1:\n"
+".align 32,0x90\n"
+".L_do_copy:\n"
" movl %%eax, %%ecx\n"
" rep movsb\n"
-" movl 4(%%esp), %%esi\n" /* move in back to %esi, toss from */
-" movl 44(%%esp), %%ebp\n" /* ebp = lcode */
+" movl 8(%%esp), %%esi\n" /* move in back to %esi, toss from */
+" movl 32(%%esp), %%ebp\n" /* ebp = lcode */
" jmp .L_while_test\n"
".L_test_for_end_of_block:\n"
" testb $32, %%al\n"
" jz .L_invalid_literal_length_code\n"
-" movl $1, 68(%%esp)\n"
+" movl $1, 72(%%esp)\n"
" jmp .L_break_loop_with_status\n"
".L_invalid_literal_length_code:\n"
-" movl $2, 68(%%esp)\n"
+" movl $2, 72(%%esp)\n"
" jmp .L_break_loop_with_status\n"
".L_invalid_distance_code:\n"
-" movl $3, 68(%%esp)\n"
+" movl $3, 72(%%esp)\n"
" jmp .L_break_loop_with_status\n"
".L_invalid_distance_too_far:\n"
-" movl 4(%%esp), %%esi\n"
-" movl $4, 68(%%esp)\n"
+" movl 8(%%esp), %%esi\n"
+" movl $4, 72(%%esp)\n"
" jmp .L_break_loop_with_status\n"
".L_break_loop:\n"
-" movl $0, 68(%%esp)\n"
+" movl $0, 72(%%esp)\n"
".L_break_loop_with_status:\n"
/* put in, out, bits, and hold back into ar and pop esp */
-" movl %%esi, 4(%%esp)\n"
-" movl %%edi, 12(%%esp)\n"
-" movl %%ebx, 40(%%esp)\n"
-" movl %%edx, 36(%%esp)\n"
+" movl %%esi, 8(%%esp)\n" /* save in */
+" movl %%edi, 16(%%esp)\n" /* save out */
+" movl %%ebx, 44(%%esp)\n" /* save bits */
+" movl %%edx, 40(%%esp)\n" /* save hold */
+" movl 4(%%esp), %%ebp\n" /* restore esp, ebp */
" movl (%%esp), %%esp\n"
-" popl %%ebp\n"
-" popf\n"
:
: "m" (ar)
: "memory", "%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi"
);
-#elif defined( _MSC_VER )
+#elif defined( _MSC_VER ) && ! defined( _M_AMD64 )
__asm {
lea eax, ar
- pushfd
- push ebp
- mov [eax], esp
+ mov [eax], esp /* save esp, ebp */
+ mov [eax+4], ebp
mov esp, eax
- mov esi, [esp+4] /* esi = in */
- mov edi, [esp+12] /* edi = out */
- mov edx, [esp+36] /* edx = hold */
- mov ebx, [esp+40] /* ebx = bits */
- mov ebp, [esp+44] /* ebp = lcode */
+ mov esi, [esp+8] /* esi = in */
+ mov edi, [esp+16] /* edi = out */
+ mov edx, [esp+40] /* edx = hold */
+ mov ebx, [esp+44] /* ebx = bits */
+ mov ebp, [esp+32] /* ebp = lcode */
cld
jmp L_do_loop
+ALIGN 4
L_while_test:
- cmp [esp+20], edi
+ cmp [esp+24], edi
jbe L_break_loop
- cmp [esp+8], esi
+ cmp [esp+12], esi
jbe L_break_loop
L_do_loop:
@@ -465,7 +828,7 @@ L_do_loop:
or edx, eax /* hold |= *((ushort *)in)++ << bits */
L_get_length_code:
- mov eax, [esp+52] /* eax = lmask */
+ mov eax, [esp+56] /* eax = lmask */
and eax, edx /* eax &= hold */
mov eax, [ebp+eax*4] /* eax = lcode[hold & lmask] */
@@ -481,10 +844,11 @@ L_dolen:
stosb
jmp L_while_test
+ALIGN 4
L_test_for_length_base:
mov ecx, eax /* len = this */
shr ecx, 16 /* len = this.val */
- mov [esp+60], ecx /* len = this */
+ mov [esp+64], ecx /* save len */
mov cl, al
test al, 16
@@ -504,13 +868,14 @@ L_test_for_length_base:
mov cl, ch /* move op back to ecx */
L_add_bits_to_len:
- mov eax, 1
+ sub bl, cl
+ xor eax, eax
+ inc eax
shl eax, cl
dec eax
- sub bl, cl
and eax, edx /* eax &= hold */
shr edx, cl
- add [esp+60], eax /* len += hold & mask[op] */
+ add [esp+64], eax /* len += hold & mask[op] */
L_decode_distance:
cmp bl, 15
@@ -524,8 +889,8 @@ L_decode_distance:
or edx, eax /* hold |= *((ushort *)in)++ << bits */
L_get_distance_code:
- mov eax, [esp+56] /* eax = dmask */
- mov ecx, [esp+48] /* ecx = dcode */
+ mov eax, [esp+60] /* eax = dmask */
+ mov ecx, [esp+36] /* ecx = dcode */
and eax, edx /* eax &= hold */
mov eax, [ecx+eax*4]/* eax = dcode[hold & dmask] */
@@ -554,200 +919,207 @@ L_dodist:
mov cl, ch /* move op back to ecx */
L_add_bits_to_dist:
- mov eax, 1
+ sub bl, cl
+ xor eax, eax
+ inc eax
shl eax, cl
dec eax /* (1 << op) - 1 */
- sub bl, cl
and eax, edx /* eax &= hold */
shr edx, cl
add ebp, eax /* dist += hold & ((1 << op) - 1) */
L_check_window:
- mov [esp+4], esi /* save in so from can use it's reg */
+ mov [esp+8], esi /* save in so from can use it's reg */
mov eax, edi
- sub eax, [esp+16] /* nbytes = out - beg */
+ sub eax, [esp+20] /* nbytes = out - beg */
cmp eax, ebp
jb L_clip_window /* if (dist > nbytes) 4.2% */
- mov ecx, [esp+60]
+ mov ecx, [esp+64] /* ecx = len */
mov esi, edi
sub esi, ebp /* from = out - dist */
- sub ecx, 3 /* copy from to out */
+ sar ecx, 1
+ jnc L_copy_two
+
+ rep movsw
mov al, [esi]
mov [edi], al
- mov al, [esi+1]
- mov ah, [esi+2]
- add esi, 3
- mov [edi+1], al
- mov [edi+2], ah
- add edi, 3
- rep movsb
+ inc edi
+
+ mov esi, [esp+8] /* move in back to %esi, toss from */
+ mov ebp, [esp+32] /* ebp = lcode */
+ jmp L_while_test
- mov esi, [esp+4] /* move in back to %esi, toss from */
- mov ebp, [esp+44] /* ebp = lcode */
+L_copy_two:
+ rep movsw
+ mov esi, [esp+8] /* move in back to %esi, toss from */
+ mov ebp, [esp+32] /* ebp = lcode */
jmp L_while_test
+ALIGN 4
L_check_dist_one:
cmp ebp, 1 /* if dist 1, is a memset */
jne L_check_window
- cmp [esp+16], edi
- je L_check_window
-
- dec edi
- mov ecx, [esp+60]
- mov al, [edi]
- sub ecx, 3
-
- mov [edi+1], al /* memset out with from[-1] */
- mov [edi+2], al
- mov [edi+3], al
- add edi, 4
- rep stosb
- mov ebp, [esp+44] /* ebp = lcode */
+ cmp [esp+20], edi
+ je L_check_window /* out == beg, if outside window */
+
+ mov ecx, [esp+64] /* ecx = len */
+ mov al, [edi-1]
+ mov ah, al
+
+ sar ecx, 1
+ jnc L_set_two
+ mov [edi], al /* memset out with from[-1] */
+ inc edi
+
+L_set_two:
+ rep stosw
+ mov ebp, [esp+32] /* ebp = lcode */
jmp L_while_test
+ALIGN 4
L_test_for_second_level_length:
test al, 64
jnz L_test_for_end_of_block /* if ((op & 64) != 0) */
- mov eax, 1
+ xor eax, eax
+ inc eax
shl eax, cl
dec eax
and eax, edx /* eax &= hold */
- add eax, [esp+60] /* eax += this.val */
+ add eax, [esp+64] /* eax += len */
mov eax, [ebp+eax*4] /* eax = lcode[val+(hold&mask[op])]*/
jmp L_dolen
+ALIGN 4
L_test_for_second_level_dist:
test al, 64
jnz L_invalid_distance_code /* if ((op & 64) != 0) */
- mov eax, 1
+ xor eax, eax
+ inc eax
shl eax, cl
dec eax
and eax, edx /* eax &= hold */
- add eax, ebp /* eax += this.val */
- mov ecx, [esp+48] /* ecx = dcode */
+ add eax, ebp /* eax += dist */
+ mov ecx, [esp+36] /* ecx = dcode */
mov eax, [ecx+eax*4] /* eax = dcode[val+(hold&mask[op])]*/
jmp L_dodist
+ALIGN 4
L_clip_window:
mov ecx, eax
- mov eax, [esp+24] /* prepare for dist compare */
+ mov eax, [esp+48] /* eax = wsize */
neg ecx /* nbytes = -nbytes */
- mov esi, [esp+32] /* from = window */
+ mov esi, [esp+28] /* from = window */
cmp eax, ebp
jb L_invalid_distance_too_far /* if (dist > wsize) */
add ecx, ebp /* nbytes = dist - nbytes */
- cmp dword ptr [esp+28], 0
+ cmp dword ptr [esp+52], 0
jne L_wrap_around_window /* if (write != 0) */
sub eax, ecx
add esi, eax /* from += wsize - nbytes */
- mov eax, [esp+60]
- cmp eax, ecx
- jbe L_do_copy1 /* if (nbytes >= len) */
-
- sub eax, ecx /* len -= nbytes */
- rep movsb
- mov esi, edi
- sub esi, ebp /* from = out - dist */
- jmp L_do_copy1
-
+ mov eax, [esp+64] /* eax = len */
cmp eax, ecx
- jbe L_do_copy1 /* if (nbytes >= len) */
+ jbe L_do_copy /* if (nbytes >= len) */
sub eax, ecx /* len -= nbytes */
rep movsb
mov esi, edi
sub esi, ebp /* from = out - dist */
- jmp L_do_copy1
+ jmp L_do_copy
+ALIGN 4
L_wrap_around_window:
- mov eax, [esp+28]
+ mov eax, [esp+52] /* eax = write */
cmp ecx, eax
jbe L_contiguous_in_window /* if (write >= nbytes) */
- add esi, [esp+24]
- add esi, eax
- sub esi, ecx /* from += wsize + write - nbytes */
+ add esi, [esp+48] /* from += wsize */
+ add esi, eax /* from += write */
+ sub esi, ecx /* from -= nbytes */
sub ecx, eax /* nbytes -= write */
- mov eax, [esp+60]
+ mov eax, [esp+64] /* eax = len */
cmp eax, ecx
- jbe L_do_copy1 /* if (nbytes >= len) */
+ jbe L_do_copy /* if (nbytes >= len) */
sub eax, ecx /* len -= nbytes */
rep movsb
- mov esi, [esp+32] /* from = window */
- mov ecx, [esp+28] /* nbytes = write */
+ mov esi, [esp+28] /* from = window */
+ mov ecx, [esp+52] /* nbytes = write */
cmp eax, ecx
- jbe L_do_copy1 /* if (nbytes >= len) */
+ jbe L_do_copy /* if (nbytes >= len) */
sub eax, ecx /* len -= nbytes */
rep movsb
mov esi, edi
sub esi, ebp /* from = out - dist */
- jmp L_do_copy1
+ jmp L_do_copy
+ALIGN 4
L_contiguous_in_window:
add esi, eax
sub esi, ecx /* from += write - nbytes */
- mov eax, [esp+60]
+ mov eax, [esp+64] /* eax = len */
cmp eax, ecx
- jbe L_do_copy1 /* if (nbytes >= len) */
+ jbe L_do_copy /* if (nbytes >= len) */
sub eax, ecx /* len -= nbytes */
rep movsb
mov esi, edi
sub esi, ebp /* from = out - dist */
+ jmp L_do_copy
-L_do_copy1:
+ALIGN 4
+L_do_copy:
mov ecx, eax
rep movsb
- mov esi, [esp+4] /* move in back to %esi, toss from */
- mov ebp, [esp+44] /* ebp = lcode */
+ mov esi, [esp+8] /* move in back to %esi, toss from */
+ mov ebp, [esp+32] /* ebp = lcode */
jmp L_while_test
L_test_for_end_of_block:
test al, 32
jz L_invalid_literal_length_code
- mov dword ptr [esp+68], 1
+ mov dword ptr [esp+72], 1
jmp L_break_loop_with_status
L_invalid_literal_length_code:
- mov dword ptr [esp+68], 2
+ mov dword ptr [esp+72], 2
jmp L_break_loop_with_status
L_invalid_distance_code:
- mov dword ptr [esp+68], 3
+ mov dword ptr [esp+72], 3
jmp L_break_loop_with_status
L_invalid_distance_too_far:
mov esi, [esp+4]
- mov dword ptr [esp+68], 4
+ mov dword ptr [esp+72], 4
jmp L_break_loop_with_status
L_break_loop:
- mov dword ptr [esp+68], 0
+ mov dword ptr [esp+72], 0
L_break_loop_with_status:
/* put in, out, bits, and hold back into ar and pop esp */
- mov [esp+4], esi
- mov [esp+12], edi
- mov [esp+40], ebx
- mov [esp+36], edx
+ mov [esp+8], esi /* save in */
+ mov [esp+16], edi /* save out */
+ mov [esp+44], ebx /* save bits */
+ mov [esp+40], edx /* save hold */
+ mov ebp, [esp+4] /* restore esp, ebp */
mov esp, [esp]
- pop ebp
- popfd
}
+#else
+#error "x86 architecture not defined"
#endif
if (ar.status > 1) {
@@ -772,10 +1144,12 @@ L_break_loop_with_status:
/* update state and return */
strm->next_in = ar.in;
strm->next_out = ar.out;
- strm->avail_in = (unsigned)(ar.in < ar.last ? 5 + (ar.last - ar.in) :
- 5 - (ar.in - ar.last));
- strm->avail_out = (unsigned)(ar.out < ar.end ? 257 + (ar.end - ar.out) :
- 257 - (ar.out - ar.end));
+ strm->avail_in = (unsigned)(ar.in < ar.last ?
+ PAD_AVAIL_IN + (ar.last - ar.in) :
+ PAD_AVAIL_IN - (ar.in - ar.last));
+ strm->avail_out = (unsigned)(ar.out < ar.end ?
+ PAD_AVAIL_OUT + (ar.end - ar.out) :
+ PAD_AVAIL_OUT - (ar.out - ar.end));
state->hold = ar.hold;
state->bits = ar.bits;
return;
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