| %default {"preinstr":"", "result0":"r0", "result1":"r1", "chkzero":"0"} | |
| /* | |
| * Generic 64-bit "/2addr" binary operation. Provide an "instr" line | |
| * that specifies an instruction that performs "result = r0-r1 op r2-r3". | |
| * 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-long/2addr, sub-long/2addr, div-long/2addr, rem-long/2addr, | |
| * and-long/2addr, or-long/2addr, xor-long/2addr, add-double/2addr, | |
| * sub-double/2addr, mul-double/2addr, div-double/2addr, | |
| * rem-double/2addr | |
| */ | |
| /* binop/2addr vA, vB */ | |
| mov r9, rINST, lsr #8 @ r9<- A+ | |
| mov r1, rINST, lsr #12 @ r1<- B | |
| and r9, r9, #15 | |
| add r1, rFP, r1, lsl #2 @ r1<- &fp[B] | |
| add r9, rFP, r9, lsl #2 @ r9<- &fp[A] | |
| ldmia r1, {r2-r3} @ r2/r3<- vBB/vBB+1 | |
| ldmia r9, {r0-r1} @ r0/r1<- vAA/vAA+1 | |
| .if $chkzero | |
| orrs ip, r2, r3 @ second arg (r2-r3) is zero? | |
| beq common_errDivideByZero | |
| .endif | |
| FETCH_ADVANCE_INST(1) @ advance rPC, load rINST | |
| $preinstr @ optional op; may set condition codes | |
| $instr @ result<- op, r0-r3 changed | |
| GET_INST_OPCODE(ip) @ extract opcode from rINST | |
| stmia r9, {$result0,$result1} @ vAA/vAA+1<- $result0/$result1 | |
| GOTO_OPCODE(ip) @ jump to next instruction | |
| /* 12-15 instructions */ |