| %default {"preinstr":"", "result0":"a0", "result1":"a1", "chkzero":"0", "arg0":"a0", "arg1":"a1", "arg2":"a2", "arg3":"a3"} | |
| /* | |
| * Generic 64-bit "/2addr" binary operation. Provide an "instr" line | |
| * that specifies an instruction that performs "result = a0-a1 op a2-a3". | |
| * This could be a MIPS instruction or a function call. (If the result | |
| * comes back in a register other than a0, you can override "result".) | |
| * | |
| * If "chkzero" is set to 1, we perform a divide-by-zero check on | |
| * vCC (a1). Useful for integer division and modulus. | |
| * | |
| * For: add-long/2addr, sub-long/2addr, div-long/2addr, rem-long/2addr, | |
| * and-long/2addr, or-long/2addr, xor-long/2addr | |
| * rem-double/2addr | |
| */ | |
| /* binop/2addr vA, vB */ | |
| GET_OPA4(rOBJ) # rOBJ <- A+ | |
| GET_OPB(a1) # a1 <- B | |
| EAS2(a1, rFP, a1) # a1 <- &fp[B] | |
| EAS2(rOBJ, rFP, rOBJ) # rOBJ <- &fp[A] | |
| LOAD64($arg2, $arg3, a1) # a2/a3 <- vBB/vBB+1 | |
| LOAD64($arg0, $arg1, rOBJ) # a0/a1 <- vAA/vAA+1 | |
| .if $chkzero | |
| or t0, $arg2, $arg3 # second arg (a2-a3) is zero? | |
| beqz t0, common_errDivideByZero | |
| .endif | |
| FETCH_ADVANCE_INST(1) # advance rPC, load rINST | |
| $preinstr # optional op | |
| $instr # result <- op, a0-a3 changed | |
| GET_INST_OPCODE(t0) # extract opcode from rINST | |
| STORE64($result0, $result1, rOBJ) # vAA/vAA+1 <- $result0/$result1 | |
| GOTO_OPCODE(t0) # jump to next instruction | |
| /* 12-15 instructions */ | |