| %default {"preinstr":"", "result":"a0", "chkzero":"0"} | |
| /* | |
| * Generic 32-bit "/2addr" binary operation. Provide an "instr" line | |
| * that specifies an instruction that performs "result = a0 op a1". | |
| * This could be an MIPS instruction or a function call. | |
| * | |
| * If "chkzero" is set to 1, we perform a divide-by-zero check on | |
| * vCC (a1). Useful for integer division and modulus. | |
| * | |
| * For: add-int/2addr, sub-int/2addr, mul-int/2addr, div-int/2addr, | |
| * rem-int/2addr, and-int/2addr, or-int/2addr, xor-int/2addr, | |
| * shl-int/2addr, shr-int/2addr, ushr-int/2addr | |
| */ | |
| /* binop/2addr vA, vB */ | |
| GET_OPA4(rOBJ) # rOBJ <- A+ | |
| GET_OPB(a3) # a3 <- B | |
| GET_VREG(a0, rOBJ) # a0 <- vA | |
| GET_VREG(a1, a3) # a1 <- vB | |
| .if $chkzero | |
| # is second operand zero? | |
| beqz a1, common_errDivideByZero | |
| .endif | |
| FETCH_ADVANCE_INST(1) # advance rPC, load rINST | |
| $preinstr # optional op | |
| $instr # $result <- op, a0-a3 changed | |
| GET_INST_OPCODE(t0) # extract opcode from rINST | |
| SET_VREG_GOTO($result, rOBJ, t0) # vAA <- $result | |
| /* 10-13 instructions */ | |