c.subw Subtract word This instruction is defined by: Encoding Synopsis Subtract the 32-bit values in xs2 from xd, and store the result in xd. The xd and xs2 register indexes should be used as xd+8 and xs2+8 (registers x8-x15). C.SUBW expands into subw xd, xd, xs2. Access M HS U VS VU Always Always Always Always Always Decode Variables Bits<3> xs2 = $encoding[4:2]; Bits<3> xd = $encoding[9:7]; Execution Pruned, XLEN == 64 Original Bits<32> t0 = X[creg2reg(xd)][31:0]; Bits<32> t1 = X[creg2reg(xs2)][31:0]; X[creg2reg(xd)] = sext(t0 - t1, 31); Bits<32> t0 = X[creg2reg(xd)][31:0]; Bits<32> t1 = X[creg2reg(xs2)][31:0]; X[creg2reg(xd)] = sext(t0 - t1, 31);