1 /* 2 * Compare two floating-point values. Puts 0, 1, or -1 into the 3 * destination register based on the results of the comparison. 4 * 5 * int compare(x, y) { 6 * if (x == y) { 7 * return 0; 8 * } else if (x < y) { 9 * return -1; 10 * } else if (x > y) { 11 * return 1; 12 * } else { 13 * return 1; 14 * } 15 * } 16 */ 17 /* op vAA, vBB, vCC */ 18 FETCH r0, 1 @ r0<- CCBB 19 mov r9, rINST, lsr #8 @ r9<- AA 20 and r2, r0, #255 @ r2<- BB 21 mov r3, r0, lsr #8 @ r3<- CC 22 VREG_INDEX_TO_ADDR r2, r2 @ r2<- &vBB 23 VREG_INDEX_TO_ADDR r3, r3 @ r3<- &vCC 24 flds s0, [r2] @ s0<- vBB 25 flds s1, [r3] @ s1<- vCC 26 vcmpe.f32 s0, s1 @ compare (vBB, vCC) 27 FETCH_ADVANCE_INST 2 @ advance rPC, load rINST 28 mov r0, #1 @ r0<- 1 (default) 29 GET_INST_OPCODE ip @ extract opcode from rINST 30 fmstat @ export status flags 31 mvnmi r0, #0 @ (less than) r1<- -1 32 moveq r0, #0 @ (equal) r1<- 0 33 SET_VREG r0, r9 @ vAA<- r0 34 GOTO_OPCODE ip @ jump to next instruction 35
