32 lines
1.2 KiB
ArmAsm
32 lines
1.2 KiB
ArmAsm
%default {}
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/*
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* Compare two floating-point values. Puts 0, 1, or -1 into the
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* destination register based on the results of the comparison.
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*
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* For: cmpl-float, cmpg-float
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*/
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/* op vAA, vBB, vCC */
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srl a4, rINST, 8 # a4 <- AA
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lbu a2, 2(rPC) # a2 <- BB
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lbu a3, 3(rPC) # a3 <- CC
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GET_VREG_FLOAT f0, a2 # f0 <- vBB
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GET_VREG_FLOAT f1, a3 # f1 <- vCC
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cmp.eq.s f2, f0, f1
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li a0, 0
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bc1nez f2, 1f # done if vBB == vCC (ordered)
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.if $gt_bias
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cmp.lt.s f2, f0, f1
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li a0, -1
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bc1nez f2, 1f # done if vBB < vCC (ordered)
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li a0, 1 # vBB > vCC or unordered
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.else
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cmp.lt.s f2, f1, f0
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li a0, 1
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bc1nez f2, 1f # done if vBB > vCC (ordered)
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li a0, -1 # vBB < vCC or unordered
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.endif
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1:
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FETCH_ADVANCE_INST 2 # advance rPC, load rINST
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GET_INST_OPCODE v0 # extract opcode from rINST
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SET_VREG a0, a4 # vAA <- a0
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GOTO_OPCODE v0 # jump to next instruction
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