1 %default {"preinstr":"", "result0":"r0", "result1":"r1", "chkzero":"0"} 2 /* 3 * Generic 64-bit "/2addr" binary operation. Provide an "instr" line 4 * that specifies an instruction that performs "result = r0-r1 op r2-r3". 5 * This could be an ARM instruction or a function call. (If the result 6 * comes back in a register other than r0, you can override "result".) 7 * 8 * If "chkzero" is set to 1, we perform a divide-by-zero check on 9 * vCC (r1). Useful for integer division and modulus. 10 * 11 * For: add-long/2addr, sub-long/2addr, div-long/2addr, rem-long/2addr, 12 * and-long/2addr, or-long/2addr, xor-long/2addr, add-double/2addr, 13 * sub-double/2addr, mul-double/2addr, div-double/2addr, 14 * rem-double/2addr 15 */ 16 /* binop/2addr vA, vB */ 17 mov r1, rINST, lsr #12 @ r1<- B 18 ubfx r9, rINST, #8, #4 @ r9<- A 19 add r1, rFP, r1, lsl #2 @ r1<- &fp[B] 20 add r9, rFP, r9, lsl #2 @ r9<- &fp[A] 21 ldmia r1, {r2-r3} @ r2/r3<- vBB/vBB+1 22 ldmia r9, {r0-r1} @ r0/r1<- vAA/vAA+1 23 .if $chkzero 24 orrs ip, r2, r3 @ second arg (r2-r3) is zero? 25 beq common_errDivideByZero 26 .endif 27 FETCH_ADVANCE_INST(1) @ advance rPC, load rINST 28 29 $preinstr @ optional op; may set condition codes 30 $instr @ result<- op, r0-r3 changed 31 GET_INST_OPCODE(ip) @ extract opcode from rINST 32 stmia r9, {$result0,$result1} @ vAA/vAA+1<- $result0/$result1 33 GOTO_OPCODE(ip) @ jump to next instruction 34 /* 12-15 instructions */ 35
