riscv / riscv-p-spec

RISC-V Packed SIMD Extension
https://jira.riscv.org/browse/RVG-129
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SMUL16 #149

Open 2276884692 opened 1 year ago

2276884692 commented 1 year ago

The two Q30 results are then written into an even/odd pair of registers specified by Rd(4,1). Rd(4,1), i.e., d, determines the even/odd pair group of two registers. Specifically, the register pair includes register 2d and 2d+1. The odd “2d+1” register of the pair contains the 32-bit result calculated from the top part of Rs1 and the even “2d” register of the pair contains the 32-bit result calculated from the bottom part of Rs1. What's the meaning of this?Where to write the two Q30 results?Give me an example,please