1a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden%default {"preinstr":"", "result0":"r0", "result1":"r1", "chkzero":"0"} 2a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden /* 3a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * Generic 64-bit "/2addr" binary operation. Provide an "instr" line 4a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * that specifies an instruction that performs "result = r0-r1 op r2-r3". 5a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * This could be an ARM instruction or a function call. (If the result 6a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * comes back in a register other than r0, you can override "result".) 7a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * 8a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * If "chkzero" is set to 1, we perform a divide-by-zero check on 9a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * vCC (r1). Useful for integer division and modulus. 10a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * 11a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * For: add-long/2addr, sub-long/2addr, div-long/2addr, rem-long/2addr, 12a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * and-long/2addr, or-long/2addr, xor-long/2addr, add-double/2addr, 13a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * sub-double/2addr, mul-double/2addr, div-double/2addr, 14a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden * rem-double/2addr 15a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden */ 16a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden /* binop/2addr vA, vB */ 17a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden mov r1, rINST, lsr #12 @ r1<- B 18a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden ubfx r9, rINST, #8, #4 @ r9<- A 19a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden add r1, rFP, r1, lsl #2 @ r1<- &fp[B] 20a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden add r9, rFP, r9, lsl #2 @ r9<- &fp[A] 21a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden ldmia r1, {r2-r3} @ r2/r3<- vBB/vBB+1 22a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden ldmia r9, {r0-r1} @ r0/r1<- vAA/vAA+1 23a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden .if $chkzero 24a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden orrs ip, r2, r3 @ second arg (r2-r3) is zero? 25a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden beq common_errDivideByZero 26a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden .endif 27a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden FETCH_ADVANCE_INST(1) @ advance rPC, load rINST 28a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden 29a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden $preinstr @ optional op; may set condition codes 30a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden $instr @ result<- op, r0-r3 changed 31a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden GET_INST_OPCODE(ip) @ extract opcode from rINST 32a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden stmia r9, {$result0,$result1} @ vAA/vAA+1<- $result0/$result1 33a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden GOTO_OPCODE(ip) @ jump to next instruction 34a5069fb7eb2da846ff1fc2c903ebd8ce9fa3647fAndy McFadden /* 12-15 instructions */ 35