| %def binopWide(preinstr="", instr="add x0, x1, x2", result="x0", r1="x1", r2="x2", chkzero="0"): | |
| /* | |
| * Generic 64-bit binary operation. Provide an "instr" line that | |
| * specifies an instruction that performs "result = x1 op x2". | |
| * This could be an ARM instruction or a function call. (If the result | |
| * comes back in a register other than x0, you can override "result".) | |
| * | |
| * If "chkzero" is set to 1, we perform a divide-by-zero check on | |
| * vCC (w1). Useful for integer division and modulus. | |
| * | |
| * For: add-long, sub-long, mul-long, div-long, rem-long, and-long, or-long, | |
| * xor-long, add-double, sub-double, mul-double, div-double, rem-double | |
| */ | |
| /* binop vAA, vBB, vCC */ | |
| FETCH w0, 1 // w0<- CCBB | |
| lsr w4, wINST, #8 // w4<- AA | |
| lsr w2, w0, #8 // w2<- CC | |
| and w1, w0, #255 // w1<- BB | |
| GET_VREG_WIDE $r2, w2 // w2<- vCC | |
| GET_VREG_WIDE $r1, w1 // w1<- vBB | |
| .if $chkzero | |
| cbz $r2, common_errDivideByZero // is second operand zero? | |
| .endif | |
| FETCH_ADVANCE_INST 2 // advance rPC, load rINST | |
| $preinstr | |
| $instr // $result<- op, w0-w4 changed | |
| GET_INST_OPCODE ip // extract opcode from rINST | |
| SET_VREG_WIDE $result, w4 // vAA<- $result | |
| GOTO_OPCODE ip // jump to next instruction | |
| /* 11-14 instructions */ |