1 %default {} 2 /* 3 * Compare two floating-point values. Puts 0, 1, or -1 into the 4 * destination register based on the results of the comparison. 5 * 6 * For: cmpl-float, cmpg-float 7 */ 8 /* op vAA, vBB, vCC */ 9 srl a4, rINST, 8 # a4 <- AA 10 lbu a2, 2(rPC) # a2 <- BB 11 lbu a3, 3(rPC) # a3 <- CC 12 GET_VREG_FLOAT f0, a2 # f0 <- vBB 13 GET_VREG_FLOAT f1, a3 # f1 <- vCC 14 cmp.eq.s f2, f0, f1 15 li a0, 0 16 bc1nez f2, 1f # done if vBB == vCC (ordered) 17 .if $gt_bias 18 cmp.lt.s f2, f0, f1 19 li a0, -1 20 bc1nez f2, 1f # done if vBB < vCC (ordered) 21 li a0, 1 # vBB > vCC or unordered 22 .else 23 cmp.lt.s f2, f1, f0 24 li a0, 1 25 bc1nez f2, 1f # done if vBB > vCC (ordered) 26 li a0, -1 # vBB < vCC or unordered 27 .endif 28 1: 29 FETCH_ADVANCE_INST 2 # advance rPC, load rINST 30 GET_INST_OPCODE v0 # extract opcode from rINST 31 SET_VREG a0, a4 # vAA <- a0 32 GOTO_OPCODE v0 # jump to next instruction 33
