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#ifndef AVCODEC_X86_VPX_ARITH_H |
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#define AVCODEC_X86_VPX_ARITH_H |
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#include "libavutil/x86/asm.h" |
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#if HAVE_INLINE_ASM && HAVE_FAST_CMOV && HAVE_6REGS |
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#include "libavutil/attributes.h" |
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#define vpx_rac_get_prob vpx_rac_get_prob |
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static av_always_inline int vpx_rac_get_prob(VPXRangeCoder *c, uint8_t prob) |
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{ |
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unsigned int code_word = vpx_rac_renorm(c); |
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unsigned int low = 1 + (((c->high - 1) * prob) >> 8); |
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unsigned int low_shift = low << 16; |
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int bit = 0; |
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c->code_word = code_word; |
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__asm__( |
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"subl %4, %1 \n\t" |
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"subl %3, %2 \n\t" |
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"setae %b0 \n\t" |
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"cmovb %4, %1 \n\t" |
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"cmovb %5, %2 \n\t" |
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: "+q"(bit), "+&r"(c->high), "+&r"(c->code_word) |
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: "r"(low_shift), "r"(low), "r"(code_word) |
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); |
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return bit; |
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} |
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#endif |
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#endif |
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