1 %verify "executed" 2 %verify "basic lt, gt, eq" 3 %verify "hi equal, lo <=>" 4 %verify "lo equal, hi <=>" 5 /* 6 * Compare two 64-bit values. Puts 0, 1, or -1 into the destination 7 * register based on the results of the comparison. 8 */ 9 // TUNING: rework to avoid rIBASE spill 10 /* cmp-long vAA, vBB, vCC */ 11 movzbl 2(rPC),%ecx # ecx<- BB 12 SPILL(rIBASE) 13 movzbl 3(rPC),rIBASE # rIBASE- CC 14 GET_VREG_WORD %eax %ecx,1 # eax<- v[BB+1] 15 GET_VREG_WORD %ecx %ecx 0 # ecx<- v[BB+0] 16 cmpl 4(rFP,rIBASE,4),%eax 17 jl .L${opcode}_smaller 18 jg .L${opcode}_bigger 19 sub (rFP,rIBASE,4),%ecx 20 ja .L${opcode}_bigger 21 jb .L${opcode}_smaller 22 SET_VREG %ecx rINST 23 FETCH_INST_OPCODE 2 %ecx 24 UNSPILL(rIBASE) 25 ADVANCE_PC 2 26 GOTO_NEXT_R %ecx 27 28 .L${opcode}_bigger: 29 movl $$1,%ecx 30 SET_VREG %ecx rINST 31 FETCH_INST_OPCODE 2 %ecx 32 UNSPILL(rIBASE) 33 ADVANCE_PC 2 34 GOTO_NEXT_R %ecx 35 36 .L${opcode}_smaller: 37 movl $$-1,%ecx 38 SET_VREG %ecx rINST 39 FETCH_INST_OPCODE 2 %ecx 40 UNSPILL(rIBASE) 41 ADVANCE_PC 2 42 GOTO_NEXT_R %ecx 43
