1%default {"preinstr":"", "result0":"a0", "result1":"a1", "chkzero":"0", "arg0":"a0", "arg1":"a1", "arg2":"a2", "arg3":"a3"} 2 /* 3 * Generic 64-bit binary operation. Provide an "instr" line that 4 * specifies an instruction that performs "result = a0-a1 op a2-a3". 5 * This could be a MIPS instruction or a function call. (If the result 6 * comes back in a register other than a0, you can override "result".) 7 * 8 * If "chkzero" is set to 1, we perform a divide-by-zero check on 9 * vCC (a1). Useful for integer division and modulus. 10 * 11 * for: add-long, sub-long, div-long, rem-long, and-long, or-long, 12 * xor-long 13 * 14 * IMPORTANT: you may specify "chkzero" or "preinstr" but not both. 15 */ 16 /* binop vAA, vBB, vCC */ 17 FETCH(a0, 1) # a0 <- CCBB 18 GET_OPA(rOBJ) # rOBJ <- AA 19 and a2, a0, 255 # a2 <- BB 20 srl a3, a0, 8 # a3 <- CC 21 EAS2(rOBJ, rFP, rOBJ) # rOBJ <- &fp[AA] 22 EAS2(a2, rFP, a2) # a2 <- &fp[BB] 23 EAS2(t1, rFP, a3) # a3 <- &fp[CC] 24 LOAD64($arg0, $arg1, a2) # a0/a1 <- vBB/vBB+1 25 LOAD64($arg2, $arg3, t1) # a2/a3 <- vCC/vCC+1 26 .if $chkzero 27 or t0, $arg2, $arg3 # second arg (a2-a3) is zero? 28 beqz t0, common_errDivideByZero 29 .endif 30 FETCH_ADVANCE_INST(2) # advance rPC, load rINST 31 32 $preinstr # optional op 33 $instr # result <- op, a0-a3 changed 34 GET_INST_OPCODE(t0) # extract opcode from rINST 35 STORE64($result0, $result1, rOBJ) # vAA/vAA+1 <- $result0/$result1 36 GOTO_OPCODE(t0) # jump to next instruction 37 /* 14-17 instructions */ 38 39