| %def binopWide(preinstr="", result0="r0", result1="r1", chkzero="0", instr=""): | |
| /* | |
| * Generic 64-bit 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, sub-long, div-long, rem-long, and-long, or-long, | |
| * xor-long, add-double, sub-double, mul-double, div-double, | |
| * rem-double | |
| * | |
| * IMPORTANT: you may specify "chkzero" or "preinstr" but not both. | |
| */ | |
| /* binop vAA, vBB, vCC */ | |
| FETCH r0, 1 @ r0<- CCBB | |
| mov rINST, rINST, lsr #8 @ rINST<- AA | |
| and r2, r0, #255 @ r2<- BB | |
| mov r3, r0, lsr #8 @ r3<- CC | |
| VREG_INDEX_TO_ADDR r9, rINST @ r9<- &fp[AA] | |
| VREG_INDEX_TO_ADDR r2, r2 @ r2<- &fp[BB] | |
| VREG_INDEX_TO_ADDR r3, r3 @ r3<- &fp[CC] | |
| ldmia r2, {r0-r1} @ r0/r1<- vBB/vBB+1 | |
| ldmia r3, {r2-r3} @ r2/r3<- vCC/vCC+1 | |
| .if $chkzero | |
| orrs ip, r2, r3 @ second arg (r2-r3) is zero? | |
| beq common_errDivideByZero | |
| .endif | |
| CLEAR_SHADOW_PAIR rINST, lr, ip @ Zero out the shadow regs | |
| FETCH_ADVANCE_INST 2 @ 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 | |
| /* 14-17 instructions */ |