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ffmpeg.wasm-core
Commit 3fc4e36c authored by Mans Rullgard's avatar Mans Rullgard
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x86: h264: remove hardcoded edx in decode_significance[_8x8]_x86() 

Signed-off-by: 's avatarMans Rullgard <mans@mansr.com>
parent e4b5a204
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Showing with 37 additions and 35 deletions
libavcodec/x86/h264_i386.h
View file @ 3fc4e36c
......@@ -42,31 +42,32 @@ static int decode_significance_x86(CABACContext *c, int max_coeff,
void *end= significant_coeff_ctx_base + max_coeff - 1;
int minusstart= -(int)significant_coeff_ctx_base;
int minusindex= 4-(int)index;
int bit;
x86_reg coeff_count;
int low;
__asm__ volatile(
"movl %a9(%4), %%esi \n\t"
"movl %a10(%4), %3 \n\t"
"movl %a10(%5), %%esi \n\t"
"movl %a11(%5), %3 \n\t"
"2: \n\t"
BRANCHLESS_GET_CABAC("%%edx", "%4", "(%1)", "%3",
"%w3", "%%esi", "%k0", "%b0", "%a11")
BRANCHLESS_GET_CABAC("%4", "%5", "(%1)", "%3",
"%w3", "%%esi", "%k0", "%b0", "%a12")
"test $1, %%edx \n\t"
"test $1, %4 \n\t"
" jz 3f \n\t"
"add %8, %1 \n\t"
"add %9, %1 \n\t"
BRANCHLESS_GET_CABAC("%%edx", "%4", "(%1)", "%3",
"%w3", "%%esi", "%k0", "%b0", "%a11")
BRANCHLESS_GET_CABAC("%4", "%5", "(%1)", "%3",
"%w3", "%%esi", "%k0", "%b0", "%a12")
"sub %8, %1 \n\t"
"sub %9, %1 \n\t"
"mov %2, %0 \n\t"
"movl %5, %%ecx \n\t"
"movl %6, %%ecx \n\t"
"add %1, %%"REG_c" \n\t"
"movl %%ecx, (%0) \n\t"
"test $1, %%edx \n\t"
"test $1, %4 \n\t"
" jnz 4f \n\t"
"add $4, %0 \n\t"
......@@ -74,24 +75,24 @@ static int decode_significance_x86(CABACContext *c, int max_coeff,
"3: \n\t"
"add $1, %1 \n\t"
"cmp %6, %1 \n\t"
"cmp %7, %1 \n\t"
" jb 2b \n\t"
"mov %2, %0 \n\t"
"movl %5, %%ecx \n\t"
"movl %6, %%ecx \n\t"
"add %1, %%"REG_c" \n\t"
"movl %%ecx, (%0) \n\t"
"4: \n\t"
"add %7, %k0 \n\t"
"add %8, %k0 \n\t"
"shr $2, %k0 \n\t"
"movl %%esi, %a9(%4) \n\t"
"movl %3, %a10(%4) \n\t"
"movl %%esi, %a10(%5) \n\t"
"movl %3, %a11(%5) \n\t"
:"=&r"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index),
"=&r"(low)
"=&r"(low), "=&r"(bit)
:"r"(c), "m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off),
"i"(offsetof(CABACContext, range)), "i"(offsetof(CABACContext, low)),
"i"(offsetof(CABACContext, bytestream))
: "%"REG_c, "%edx", "%esi", "memory"
: "%"REG_c, "%esi", "memory"
);
return coeff_count;
}
......@@ -100,39 +101,40 @@ static int decode_significance_8x8_x86(CABACContext *c,
uint8_t *significant_coeff_ctx_base,
int *index, x86_reg last_off, const uint8_t *sig_off){
int minusindex= 4-(int)index;
int bit;
x86_reg coeff_count;
int low;
x86_reg last=0;
__asm__ volatile(
"movl %a9(%4), %%esi \n\t"
"movl %a10(%4), %3 \n\t"
"movl %a10(%5), %%esi \n\t"
"movl %a11(%5), %3 \n\t"
"mov %1, %%"REG_D" \n\t"
"2: \n\t"
"mov %7, %0 \n\t"
"mov %8, %0 \n\t"
"movzbl (%0, %%"REG_D"), %%edi \n\t"
"add %6, %%"REG_D" \n\t"
"add %7, %%"REG_D" \n\t"
BRANCHLESS_GET_CABAC("%%edx", "%4", "(%%"REG_D")", "%3",
"%w3", "%%esi", "%k0", "%b0", "%a11")
BRANCHLESS_GET_CABAC("%4", "%5", "(%%"REG_D")", "%3",
"%w3", "%%esi", "%k0", "%b0", "%a12")
"mov %1, %%edi \n\t"
"test $1, %%edx \n\t"
"test $1, %4 \n\t"
" jz 3f \n\t"
"movzbl "MANGLE(last_coeff_flag_offset_8x8)"(%%edi), %%edi\n\t"
"add %6, %%"REG_D" \n\t"
"add %8, %%"REG_D" \n\t"
"add %7, %%"REG_D" \n\t"
"add %9, %%"REG_D" \n\t"
BRANCHLESS_GET_CABAC("%%edx", "%4", "(%%"REG_D")", "%3",
"%w3", "%%esi", "%k0", "%b0", "%a11")
BRANCHLESS_GET_CABAC("%4", "%5", "(%%"REG_D")", "%3",
"%w3", "%%esi", "%k0", "%b0", "%a12")
"mov %2, %0 \n\t"
"mov %1, %%edi \n\t"
"movl %%edi, (%0) \n\t"
"test $1, %%edx \n\t"
"test $1, %4 \n\t"
" jnz 4f \n\t"
"add $4, %0 \n\t"
......@@ -146,16 +148,16 @@ static int decode_significance_8x8_x86(CABACContext *c,
"mov %2, %0 \n\t"
"movl %%edi, (%0) \n\t"
"4: \n\t"
"addl %5, %k0 \n\t"
"addl %6, %k0 \n\t"
"shr $2, %k0 \n\t"
"movl %%esi, %a9(%4) \n\t"
"movl %3, %a10(%4) \n\t"
:"=&r"(coeff_count),"+m"(last), "+m"(index), "=&r"(low)
"movl %%esi, %a10(%5) \n\t"
"movl %3, %a11(%5) \n\t"
:"=&r"(coeff_count),"+m"(last), "+m"(index), "=&r"(low), "=&r"(bit)
:"r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base), "m"(sig_off), "m"(last_off),
"i"(offsetof(CABACContext, range)), "i"(offsetof(CABACContext, low)),
"i"(offsetof(CABACContext, bytestream))
: "%"REG_c, "%edx", "%esi", "%"REG_D, "memory"
: "%"REG_c, "%esi", "%"REG_D, "memory"
);
return coeff_count;
}
......
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