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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PM0014 데이터시트(PDF) 22 Page - STMicroelectronics |
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PM0014 데이터시트(HTML) 22 Page - STMicroelectronics |
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22 / 46 page  Arithmetic library functions PM0014 22/46 5.4.2 mul_q31_q31_q31 mul_q31_q31_q31 (short LeftOpMsb, short LeftOpLsb, short RightOpMsb, short RightOpLsb, long *Output) Description: Multiplication of two real 32-bit fractional operands. Output is on 32 bits. Argument: LeftOpMsb Left operand most significant bits. LeftOpLsb Left operand least significant bits. RightOpMsb Right operand most significant bits. RightOpLsb Right operand least significant bits. Output Output pointer. Algorithm: LeftOp * RightOp = Output Note: None Assembly source code: mul_q31_q31_q31.asm Code size and cycles: Size: 54 bytes Instruction cycles: 19 Test: Two files are provided to test the function: an input vector file (mul_q31_q31_q31.in) and an output vector file (mul_q31_q31_q31.res): mul_q31_q31_q31.in is made as follows: LeftOpMsb1, LeftOpLsb1, RightOpMsb1, RightOpLsb1, ... mul_q31_q31_q31.res is made as follows: Output1,... |
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