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@ -32,7 +32,7 @@ typedef struct SoftFloat{ |
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int32_t mant; |
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}SoftFloat; |
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static av_const SoftFloat av_normalize_sf(SoftFloat a){ |
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static SoftFloat av_normalize_sf(SoftFloat a){ |
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if(a.mant){ |
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#if 1 |
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while((a.mant + 0x20000000U)<0x40000000U){ |
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@ -54,7 +54,7 @@ static av_const SoftFloat av_normalize_sf(SoftFloat a){ |
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return a; |
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} |
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static inline av_const SoftFloat av_normalize1_sf(SoftFloat a){ |
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static inline SoftFloat av_normalize1_sf(SoftFloat a){ |
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#if 1 |
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if(a.mant + 0x40000000 < 0){ |
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a.exp++; |
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@ -76,7 +76,7 @@ static inline av_const SoftFloat av_normalize1_sf(SoftFloat a){ |
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* normalized then the output wont be worse then the other input |
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* if both are normalized then the output will be normalized |
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*/ |
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static inline av_const SoftFloat av_mul_sf(SoftFloat a, SoftFloat b){ |
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static inline SoftFloat av_mul_sf(SoftFloat a, SoftFloat b){ |
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a.exp += b.exp; |
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a.mant = (a.mant * (int64_t)b.mant) >> ONE_BITS; |
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return av_normalize1_sf(a); |
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@ -87,31 +87,31 @@ static inline av_const SoftFloat av_mul_sf(SoftFloat a, SoftFloat b){ |
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* b has to be normalized and not zero |
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* @return will not be more denormalized then a |
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*/ |
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static av_const SoftFloat av_div_sf(SoftFloat a, SoftFloat b){ |
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static SoftFloat av_div_sf(SoftFloat a, SoftFloat b){ |
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a.exp -= b.exp+1; |
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a.mant = ((int64_t)a.mant<<(ONE_BITS+1)) / b.mant; |
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return av_normalize1_sf(a); |
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} |
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static inline av_const int av_cmp_sf(SoftFloat a, SoftFloat b){ |
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static inline int av_cmp_sf(SoftFloat a, SoftFloat b){ |
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int t= a.exp - b.exp; |
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if(t<0) return (a.mant >> (-t)) - b.mant ; |
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else return a.mant - (b.mant >> t); |
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} |
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static inline av_const SoftFloat av_add_sf(SoftFloat a, SoftFloat b){ |
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static inline SoftFloat av_add_sf(SoftFloat a, SoftFloat b){ |
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int t= a.exp - b.exp; |
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if(t<0) return av_normalize1_sf((SoftFloat){b.exp, b.mant + (a.mant >> (-t))}); |
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else return av_normalize1_sf((SoftFloat){a.exp, a.mant + (b.mant >> t )}); |
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} |
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static inline av_const SoftFloat av_sub_sf(SoftFloat a, SoftFloat b){ |
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static inline SoftFloat av_sub_sf(SoftFloat a, SoftFloat b){ |
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return av_add_sf(a, (SoftFloat){b.exp, -b.mant}); |
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} |
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//FIXME sqrt, log, exp, pow, sin, cos
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static inline av_const SoftFloat av_int2sf(int v, int frac_bits){ |
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static inline SoftFloat av_int2sf(int v, int frac_bits){ |
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return av_normalize_sf((SoftFloat){ONE_BITS-frac_bits, v}); |
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} |
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@ -119,7 +119,7 @@ static inline av_const SoftFloat av_int2sf(int v, int frac_bits){ |
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* |
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* rounding is to -inf |
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*/ |
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static inline av_const int av_sf2int(SoftFloat v, int frac_bits){ |
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static inline int av_sf2int(SoftFloat v, int frac_bits){ |
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v.exp += frac_bits - ONE_BITS; |
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if(v.exp >= 0) return v.mant << v.exp ; |
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else return v.mant >>(-v.exp); |
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