%default {"preinstr":"", "result":"w0", "chkzero":"0"} /* * Generic 32-bit "lit16" binary operation. Provide an "instr" line * that specifies an instruction that performs "result = w0 op w1". * This could be an ARM instruction or a function call. (If the result * comes back in a register other than w0, you can override "result".) * * If "chkzero" is set to 1, we perform a divide-by-zero check on * vCC (w1). Useful for integer division and modulus. * * For: add-int/lit16, rsub-int, mul-int/lit16, div-int/lit16, * rem-int/lit16, and-int/lit16, or-int/lit16, xor-int/lit16 */ /* binop/lit16 vA, vB, #+CCCC */ FETCH_S w1, 1 // w1<- ssssCCCC (sign-extended) lsr w2, wINST, #12 // w2<- B ubfx w9, wINST, #8, #4 // w9<- A GET_VREG w0, w2 // w0<- vB .if $chkzero cbz w1, common_errDivideByZero .endif FETCH_ADVANCE_INST 2 // advance rPC, load rINST $preinstr $instr // $result<- op, w0-w3 changed GET_INST_OPCODE ip // extract opcode from rINST SET_VREG $result, w9 // vAA<- $result GOTO_OPCODE ip // jump to next instruction /* 10-13 instructions */