%default {"result":"r0", "chkzero":"0"} /* * Generic 32-bit "lit16" binary operation. Provide an "instr" line * that specifies an instruction that performs "result = r0 op r1". * This could be an ARM instruction or a function call. (If the result * comes back in a register other than r0, you can override "result".) * * If "chkzero" is set to 1, we perform a divide-by-zero check on * vCC (r1). 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(r1, 1) @ r1<- ssssCCCC (sign-extended) mov r2, rINST, lsr #12 @ r2<- B mov r9, rINST, lsr #8 @ r9<- A+ GET_VREG(r0, r2) @ r0<- vB and r9, r9, #15 .if $chkzero cmp r1, #0 @ is second operand zero? beq common_errDivideByZero .endif FETCH_ADVANCE_INST(2) @ advance rPC, load rINST $instr @ $result<- op, r0-r3 changed GET_INST_OPCODE(ip) @ extract opcode from rINST SET_VREG($result, r9) @ vAA<- $result GOTO_OPCODE(ip) @ jump to next instruction /* 10-13 instructions */