mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2025-03-23 04:24:35 +02:00
cabac: move x86 asm to libavcodec/x86/cabac.h
Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard
parent
d075e7d540
commit
2143d69bdd
@ -33,7 +33,6 @@
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//#undef NDEBUG
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//#undef NDEBUG
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#include <assert.h>
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#include <assert.h>
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#include "libavutil/x86_cpu.h"
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#define CABAC_BITS 16
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#define CABAC_BITS 16
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#define CABAC_MASK ((1<<CABAC_BITS)-1)
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#define CABAC_MASK ((1<<CABAC_BITS)-1)
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@ -57,6 +56,9 @@ extern uint8_t ff_h264_mps_state[2*64]; ///< transIdxMPS
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extern uint8_t ff_h264_lps_state[2*64]; ///< transIdxLPS
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extern uint8_t ff_h264_lps_state[2*64]; ///< transIdxLPS
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extern const uint8_t ff_h264_norm_shift[512];
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extern const uint8_t ff_h264_norm_shift[512];
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#if ARCH_X86
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# include "x86/cabac.h"
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#endif
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void ff_init_cabac_encoder(CABACContext *c, uint8_t *buf, int buf_size);
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void ff_init_cabac_encoder(CABACContext *c, uint8_t *buf, int buf_size);
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void ff_init_cabac_decoder(CABACContext *c, const uint8_t *buf, int buf_size);
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void ff_init_cabac_decoder(CABACContext *c, const uint8_t *buf, int buf_size);
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@ -270,26 +272,6 @@ static void refill(CABACContext *c){
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c->bytestream+= CABAC_BITS/8;
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c->bytestream+= CABAC_BITS/8;
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}
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}
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#if ! ( ARCH_X86 && HAVE_7REGS && !defined(BROKEN_RELOCATIONS) )
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static void refill2(CABACContext *c){
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int i, x;
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x= c->low ^ (c->low-1);
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i= 7 - ff_h264_norm_shift[x>>(CABAC_BITS-1)];
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x= -CABAC_MASK;
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#if CABAC_BITS == 16
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x+= (c->bytestream[0]<<9) + (c->bytestream[1]<<1);
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#else
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x+= c->bytestream[0]<<1;
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#endif
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c->low += x<<i;
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c->bytestream+= CABAC_BITS/8;
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}
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#endif
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static inline void renorm_cabac_decoder(CABACContext *c){
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static inline void renorm_cabac_decoder(CABACContext *c){
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while(c->range < 0x100){
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while(c->range < 0x100){
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c->range+= c->range;
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c->range+= c->range;
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@ -307,83 +289,26 @@ static inline void renorm_cabac_decoder_once(CABACContext *c){
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refill(c);
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refill(c);
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}
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}
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#ifndef get_cabac_inline
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static void refill2(CABACContext *c){
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int i, x;
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x= c->low ^ (c->low-1);
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i= 7 - ff_h264_norm_shift[x>>(CABAC_BITS-1)];
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x= -CABAC_MASK;
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#if CABAC_BITS == 16
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x+= (c->bytestream[0]<<9) + (c->bytestream[1]<<1);
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#else
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x+= c->bytestream[0]<<1;
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#endif
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c->low += x<<i;
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c->bytestream+= CABAC_BITS/8;
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}
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static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const state){
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static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const state){
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//FIXME gcc generates duplicate load/stores for c->low and c->range
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#if ARCH_X86 && HAVE_7REGS && !defined(BROKEN_RELOCATIONS)
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int bit, low, range, tmp;
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#if HAVE_FAST_CMOV
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#define BRANCHLESS_GET_CABAC_UPDATE(ret, cabac, statep, low, lowword, range, tmp)\
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"mov "tmp" , %%ecx \n\t"\
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"shl $17 , "tmp" \n\t"\
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"cmp "low" , "tmp" \n\t"\
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"cmova %%ecx , "range" \n\t"\
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"sbb %%ecx , %%ecx \n\t"\
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"and %%ecx , "tmp" \n\t"\
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"sub "tmp" , "low" \n\t"\
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"xor %%ecx , "ret" \n\t"
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#else /* HAVE_FAST_CMOV */
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#define BRANCHLESS_GET_CABAC_UPDATE(ret, cabac, statep, low, lowword, range, tmp)\
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"mov "tmp" , %%ecx \n\t"\
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"shl $17 , "tmp" \n\t"\
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"sub "low" , "tmp" \n\t"\
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"sar $31 , "tmp" \n\t" /*lps_mask*/\
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"sub %%ecx , "range" \n\t" /*RangeLPS - range*/\
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"and "tmp" , "range" \n\t" /*(RangeLPS - range)&lps_mask*/\
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"add %%ecx , "range" \n\t" /*new range*/\
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"shl $17 , %%ecx \n\t"\
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"and "tmp" , %%ecx \n\t"\
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"sub %%ecx , "low" \n\t"\
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"xor "tmp" , "ret" \n\t"
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#endif /* HAVE_FAST_CMOV */
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#define BRANCHLESS_GET_CABAC(ret, cabac, statep, low, lowword, range, tmp, tmpbyte, byte) \
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"movzbl "statep" , "ret" \n\t"\
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"mov "range" , "tmp" \n\t"\
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"and $0xC0 , "range" \n\t"\
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"movzbl "MANGLE(ff_h264_lps_range)"("ret", "range", 2), "range" \n\t"\
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"sub "range" , "tmp" \n\t"\
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BRANCHLESS_GET_CABAC_UPDATE(ret, cabac, statep, low, lowword, range, tmp)\
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"movzbl " MANGLE(ff_h264_norm_shift) "("range"), %%ecx \n\t"\
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"shl %%cl , "range" \n\t"\
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"movzbl "MANGLE(ff_h264_mlps_state)"+128("ret"), "tmp" \n\t"\
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"mov "tmpbyte" , "statep" \n\t"\
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"shl %%cl , "low" \n\t"\
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"test "lowword" , "lowword" \n\t"\
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" jnz 1f \n\t"\
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"mov "byte"("cabac"), %%"REG_c" \n\t"\
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"movzwl (%%"REG_c") , "tmp" \n\t"\
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"bswap "tmp" \n\t"\
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"shr $15 , "tmp" \n\t"\
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"sub $0xFFFF , "tmp" \n\t"\
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"add $2 , %%"REG_c" \n\t"\
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"mov %%"REG_c" , "byte "("cabac") \n\t"\
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"lea -1("low") , %%ecx \n\t"\
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"xor "low" , %%ecx \n\t"\
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"shr $15 , %%ecx \n\t"\
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"movzbl " MANGLE(ff_h264_norm_shift) "(%%ecx), %%ecx \n\t"\
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"neg %%ecx \n\t"\
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"add $7 , %%ecx \n\t"\
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"shl %%cl , "tmp" \n\t"\
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"add "tmp" , "low" \n\t"\
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"1: \n\t"
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__asm__ volatile(
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"movl %a6(%5), %2 \n\t"
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"movl %a7(%5), %1 \n\t"
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BRANCHLESS_GET_CABAC("%0", "%5", "(%4)", "%1", "%w1", "%2", "%3", "%b3", "%a8")
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"movl %2, %a6(%5) \n\t"
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"movl %1, %a7(%5) \n\t"
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:"=&r"(bit), "=&r"(low), "=&r"(range), "=&r"(tmp)
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:"r"(state), "r"(c),
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"i"(offsetof(CABACContext, range)), "i"(offsetof(CABACContext, low)),
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"i"(offsetof(CABACContext, bytestream))
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: "%"REG_c, "memory"
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);
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bit&=1;
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#else /* ARCH_X86 && HAVE_7REGS && !defined(BROKEN_RELOCATIONS) */
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int s = *state;
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int s = *state;
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int RangeLPS= ff_h264_lps_range[2*(c->range&0xC0) + s];
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int RangeLPS= ff_h264_lps_range[2*(c->range&0xC0) + s];
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int bit, lps_mask;
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int bit, lps_mask;
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@ -403,9 +328,9 @@ static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const st
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c->low <<= lps_mask;
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c->low <<= lps_mask;
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if(!(c->low & CABAC_MASK))
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if(!(c->low & CABAC_MASK))
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refill2(c);
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refill2(c);
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#endif /* ARCH_X86 && HAVE_7REGS && !defined(BROKEN_RELOCATIONS) */
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return bit;
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return bit;
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}
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}
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#endif
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static int av_noinline av_unused get_cabac_noinline(CABACContext *c, uint8_t * const state){
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static int av_noinline av_unused get_cabac_noinline(CABACContext *c, uint8_t * const state){
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return get_cabac_inline(c,state);
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return get_cabac_inline(c,state);
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@ -432,41 +357,8 @@ static int av_unused get_cabac_bypass(CABACContext *c){
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}
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}
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#ifndef get_cabac_bypass_sign
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static av_always_inline int get_cabac_bypass_sign(CABACContext *c, int val){
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static av_always_inline int get_cabac_bypass_sign(CABACContext *c, int val){
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#if ARCH_X86
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x86_reg tmp;
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__asm__ volatile(
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"movl %a3(%2), %k1 \n\t"
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"movl %a4(%2), %%eax \n\t"
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"shl $17, %k1 \n\t"
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"add %%eax, %%eax \n\t"
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"sub %k1, %%eax \n\t"
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"cltd \n\t"
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"and %%edx, %k1 \n\t"
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"add %k1, %%eax \n\t"
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"xor %%edx, %%ecx \n\t"
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"sub %%edx, %%ecx \n\t"
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"test %%ax, %%ax \n\t"
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" jnz 1f \n\t"
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"mov %a5(%2), %1 \n\t"
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"subl $0xFFFF, %%eax \n\t"
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"movzwl (%1), %%edx \n\t"
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"bswap %%edx \n\t"
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"shrl $15, %%edx \n\t"
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"add $2, %1 \n\t"
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"addl %%edx, %%eax \n\t"
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"mov %1, %a5(%2) \n\t"
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"1: \n\t"
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"movl %%eax, %a4(%2) \n\t"
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:"+c"(val), "=&r"(tmp)
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:"r"(c),
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"i"(offsetof(CABACContext, range)), "i"(offsetof(CABACContext, low)),
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"i"(offsetof(CABACContext, bytestream))
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: "%eax", "%edx", "memory"
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);
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return val;
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#else
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int range, mask;
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int range, mask;
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c->low += c->low;
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c->low += c->low;
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@ -479,8 +371,8 @@ static av_always_inline int get_cabac_bypass_sign(CABACContext *c, int val){
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range &= mask;
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range &= mask;
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c->low += range;
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c->low += range;
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return (val^mask)-mask;
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return (val^mask)-mask;
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#endif
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}
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}
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#endif
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/**
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/**
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*
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*
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148
libavcodec/x86/cabac.h
Normal file
148
libavcodec/x86/cabac.h
Normal file
@ -0,0 +1,148 @@
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/*
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_X86_CABAC_H
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#define AVCODEC_X86_CABAC_H
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#include "libavcodec/cabac.h"
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#include "libavutil/attributes.h"
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#include "libavutil/x86_cpu.h"
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#include "config.h"
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#if HAVE_FAST_CMOV
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#define BRANCHLESS_GET_CABAC_UPDATE(ret, cabac, statep, low, lowword, range, tmp)\
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"mov "tmp" , %%ecx \n\t"\
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"shl $17 , "tmp" \n\t"\
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"cmp "low" , "tmp" \n\t"\
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"cmova %%ecx , "range" \n\t"\
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"sbb %%ecx , %%ecx \n\t"\
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"and %%ecx , "tmp" \n\t"\
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"sub "tmp" , "low" \n\t"\
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"xor %%ecx , "ret" \n\t"
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#else /* HAVE_FAST_CMOV */
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#define BRANCHLESS_GET_CABAC_UPDATE(ret, cabac, statep, low, lowword, range, tmp)\
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"mov "tmp" , %%ecx \n\t"\
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"shl $17 , "tmp" \n\t"\
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"sub "low" , "tmp" \n\t"\
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"sar $31 , "tmp" \n\t" /*lps_mask*/\
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"sub %%ecx , "range" \n\t" /*RangeLPS - range*/\
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"and "tmp" , "range" \n\t" /*(RangeLPS - range)&lps_mask*/\
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"add %%ecx , "range" \n\t" /*new range*/\
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"shl $17 , %%ecx \n\t"\
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"and "tmp" , %%ecx \n\t"\
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"sub %%ecx , "low" \n\t"\
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"xor "tmp" , "ret" \n\t"
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#endif /* HAVE_FAST_CMOV */
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#define BRANCHLESS_GET_CABAC(ret, cabac, statep, low, lowword, range, tmp, tmpbyte, byte) \
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"movzbl "statep" , "ret" \n\t"\
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"mov "range" , "tmp" \n\t"\
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"and $0xC0 , "range" \n\t"\
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"movzbl "MANGLE(ff_h264_lps_range)"("ret", "range", 2), "range" \n\t"\
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"sub "range" , "tmp" \n\t"\
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BRANCHLESS_GET_CABAC_UPDATE(ret, cabac, statep, low, lowword, \
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range, tmp) \
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"movzbl " MANGLE(ff_h264_norm_shift) "("range"), %%ecx \n\t"\
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"shl %%cl , "range" \n\t"\
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"movzbl "MANGLE(ff_h264_mlps_state)"+128("ret"), "tmp" \n\t"\
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"mov "tmpbyte" , "statep" \n\t"\
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"shl %%cl , "low" \n\t"\
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"test "lowword" , "lowword" \n\t"\
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" jnz 1f \n\t"\
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"mov "byte"("cabac"), %%"REG_c" \n\t"\
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"movzwl (%%"REG_c") , "tmp" \n\t"\
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"bswap "tmp" \n\t"\
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"shr $15 , "tmp" \n\t"\
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"sub $0xFFFF , "tmp" \n\t"\
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"add $2 , %%"REG_c" \n\t"\
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"mov %%"REG_c" , "byte "("cabac") \n\t"\
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"lea -1("low") , %%ecx \n\t"\
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"xor "low" , %%ecx \n\t"\
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"shr $15 , %%ecx \n\t"\
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"movzbl " MANGLE(ff_h264_norm_shift) "(%%ecx), %%ecx \n\t"\
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"neg %%ecx \n\t"\
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||||||
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"add $7 , %%ecx \n\t"\
|
||||||
|
"shl %%cl , "tmp" \n\t"\
|
||||||
|
"add "tmp" , "low" \n\t"\
|
||||||
|
"1: \n\t"
|
||||||
|
|
||||||
|
#if ARCH_X86 && HAVE_7REGS && !defined(BROKEN_RELOCATIONS)
|
||||||
|
#define get_cabac_inline get_cabac_inline_x86
|
||||||
|
static av_always_inline int get_cabac_inline_x86(CABACContext *c,
|
||||||
|
uint8_t *const state)
|
||||||
|
{
|
||||||
|
int bit, low, range, tmp;
|
||||||
|
|
||||||
|
__asm__ volatile(
|
||||||
|
"movl %a6(%5), %2 \n\t"
|
||||||
|
"movl %a7(%5), %1 \n\t"
|
||||||
|
BRANCHLESS_GET_CABAC("%0", "%5", "(%4)", "%1", "%w1", "%2",
|
||||||
|
"%3", "%b3", "%a8")
|
||||||
|
"movl %2, %a6(%5) \n\t"
|
||||||
|
"movl %1, %a7(%5) \n\t"
|
||||||
|
|
||||||
|
:"=&r"(bit), "=&r"(low), "=&r"(range), "=&r"(tmp)
|
||||||
|
:"r"(state), "r"(c),
|
||||||
|
"i"(offsetof(CABACContext, range)), "i"(offsetof(CABACContext, low)),
|
||||||
|
"i"(offsetof(CABACContext, bytestream))
|
||||||
|
: "%"REG_c, "memory"
|
||||||
|
);
|
||||||
|
return bit & 1;
|
||||||
|
}
|
||||||
|
#endif /* ARCH_X86 && HAVE_7REGS && !defined(BROKEN_RELOCATIONS) */
|
||||||
|
|
||||||
|
#define get_cabac_bypass_sign get_cabac_bypass_sign_x86
|
||||||
|
static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val)
|
||||||
|
{
|
||||||
|
x86_reg tmp;
|
||||||
|
__asm__ volatile(
|
||||||
|
"movl %a3(%2), %k1 \n\t"
|
||||||
|
"movl %a4(%2), %%eax \n\t"
|
||||||
|
"shl $17, %k1 \n\t"
|
||||||
|
"add %%eax, %%eax \n\t"
|
||||||
|
"sub %k1, %%eax \n\t"
|
||||||
|
"cltd \n\t"
|
||||||
|
"and %%edx, %k1 \n\t"
|
||||||
|
"add %k1, %%eax \n\t"
|
||||||
|
"xor %%edx, %%ecx \n\t"
|
||||||
|
"sub %%edx, %%ecx \n\t"
|
||||||
|
"test %%ax, %%ax \n\t"
|
||||||
|
" jnz 1f \n\t"
|
||||||
|
"mov %a5(%2), %1 \n\t"
|
||||||
|
"subl $0xFFFF, %%eax \n\t"
|
||||||
|
"movzwl (%1), %%edx \n\t"
|
||||||
|
"bswap %%edx \n\t"
|
||||||
|
"shrl $15, %%edx \n\t"
|
||||||
|
"add $2, %1 \n\t"
|
||||||
|
"addl %%edx, %%eax \n\t"
|
||||||
|
"mov %1, %a5(%2) \n\t"
|
||||||
|
"1: \n\t"
|
||||||
|
"movl %%eax, %a4(%2) \n\t"
|
||||||
|
|
||||||
|
:"+c"(val), "=&r"(tmp)
|
||||||
|
:"r"(c),
|
||||||
|
"i"(offsetof(CABACContext, range)), "i"(offsetof(CABACContext, low)),
|
||||||
|
"i"(offsetof(CABACContext, bytestream))
|
||||||
|
: "%eax", "%edx", "memory"
|
||||||
|
);
|
||||||
|
return val;
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* AVCODEC_X86_CABAC_H */
|
||||||
@ -32,6 +32,7 @@
|
|||||||
#include <stddef.h>
|
#include <stddef.h>
|
||||||
|
|
||||||
#include "libavcodec/cabac.h"
|
#include "libavcodec/cabac.h"
|
||||||
|
#include "cabac.h"
|
||||||
|
|
||||||
//FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
|
//FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
|
||||||
//as that would make optimization work hard)
|
//as that would make optimization work hard)
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user