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PM0014 Datasheet(PDF) 21 Page - STMicroelectronics |
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PM0014 Datasheet(HTML) 21 Page - STMicroelectronics |
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21 / 46 page  PM0014 Arithmetic library functions 21/46 5.4 Multiplication 5.4.1 mul_q15_q15_q31 mul_q15_q15_q31 (short LeftOp, short RightOp, long *Output) Description: Multiplication of two real 16-bit fractional operands. Argument: LeftOp Left operand. RightOp Right operand. Output Output pointer. Algorithm: LeftOp * RightOp = Output Note: None Assembly source code: mul_q15_q15_q31.asm Code size and cycles: Size: 22 bytes Instruction cycles: 10 Test: Two files are provided to test the function: an input vector file (mul_q15_q15_q31.in) and an output vector file (mul_q15_q15_q31.res): mul_q15_q15_q31.in is made as follows: LeftOp1, RightOp1, ... mul_q15_q15_q31.res is made as follows: Output1, ... |
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