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@ -106,6 +106,21 @@ static inline uint32 GetVariable(const ResolverObject *object, byte variable, by
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}
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/**
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* Rotate val rot times to the right
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* @param val the value to rotate
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* @param rot the amount of times to rotate
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* @return the rotated value
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*/
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static uint32 RotateRight(uint32 val, uint32 rot)
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{
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/* Do not rotate more than necessary */
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rot %= 32;
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return (val >> rot) | (val << (32 - rot));
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}
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/* Evaluate an adjustment for a variable of the given size.
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* U is the unsigned type and S is the signed type to use. */
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template <typename U, typename S>
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@ -140,6 +155,9 @@ static U EvalAdjustT(const DeterministicSpriteGroupAdjust *adjust, ResolverObjec
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case DSGA_OP_STO: _temp_store.Store(value, last_value); return last_value;
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case DSGA_OP_RST: return value;
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case DSGA_OP_STOP: if (object->psa != NULL) object->psa->Store(value, last_value); return last_value;
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case DSGA_OP_ROR: return RotateRight(last_value, value);
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case DSGA_OP_SCMP: return ((S)last_value == (S)value) ? 1 : ((S)last_value < (S)value ? 0 : 2);
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case DSGA_OP_UCMP: return ((U)last_value == (U)value) ? 1 : ((U)last_value < (U)value ? 0 : 2);
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default: return value;
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}
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}
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