1 %verify "executed" 2 %verify "basic lt, gt, eq */ 3 %verify "left arg NaN" 4 %verify "right arg NaN" 5 /* 6 * Compare two floating-point values. Puts 0, 1, or -1 into the 7 * destination register based on the results of the comparison. 8 * 9 * int compare(x, y) { 10 * if (x == y) { 11 * return 0; 12 * } else if (x < y) { 13 * return -1; 14 * } else if (x > y) { 15 * return 1; 16 * } else { 17 * return 1; 18 * } 19 * } 20 */ 21 /* op vAA, vBB, vCC */ 22 FETCH(r0, 1) @ r0<- CCBB 23 mov r9, rINST, lsr #8 @ r9<- AA 24 and r2, r0, #255 @ r2<- BB 25 mov r3, r0, lsr #8 @ r3<- CC 26 VREG_INDEX_TO_ADDR(r2, r2) @ r2<- &vBB 27 VREG_INDEX_TO_ADDR(r3, r3) @ r3<- &vCC 28 fldd d0, [r2] @ d0<- vBB 29 fldd d1, [r3] @ d1<- vCC 30 fcmped d0, d1 @ compare (vBB, vCC) 31 FETCH_ADVANCE_INST(2) @ advance rPC, load rINST 32 mov r0, #1 @ r0<- 1 (default) 33 GET_INST_OPCODE(ip) @ extract opcode from rINST 34 fmstat @ export status flags 35 mvnmi r0, #0 @ (less than) r1<- -1 36 moveq r0, #0 @ (equal) r1<- 0 37 b .L${opcode}_finish @ argh 38 39 %break 40 .L${opcode}_finish: 41 SET_VREG(r0, r9) @ vAA<- r0 42 GOTO_OPCODE(ip) @ jump to next instruction 43
