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AEON: make bn.beqi immediate signed #1285

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Sep 3, 2023
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AEON: make bn.beqi immediate signed #1285

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2 changes: 1 addition & 1 deletion src/Arch/OpenRISC/Aeon/AeonDisassembler.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -557,7 +557,7 @@ private static Decoder<AeonDisassembler, Mnemonic, AeonInstruction> Create24bitI

var decode001000 = Mask(0, 2, " 8",
// branch if reg == imm
Instr(Mnemonic.bn_beqi__, InstrClass.ConditionalTransfer, R13, uimm10_3, disp2_8), // guess
Instr(Mnemonic.bn_beqi__, InstrClass.ConditionalTransfer, R13, simm10_3, disp2_8), // guess
Instr(Mnemonic.bn_bf, InstrClass.ConditionalTransfer, disp2_16), // chenxing(mod), source
Instr(Mnemonic.bn_bnei__, InstrClass.ConditionalTransfer, R13, uimm10_3, disp2_8),
Instr(Mnemonic.bn_bnf__, InstrClass.ConditionalTransfer, disp2_16));
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11 changes: 10 additions & 1 deletion src/UnitTests/Arch/OpenRISC/AeonRewriterTests.cs
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Expand Up @@ -160,7 +160,16 @@ public void AeonRw_bn_beqi__()
Given_HexString("2061E0");
AssertCode( // bn.beqi? r3,0x0,00100078
"0|T--|00100000(3): 1 instructions",
"1|T--|if (r3 == 0<32>) branch 00100078");
"1|T--|if (r3 == 0<i32>) branch 00100078");
}

[Test]
public void AeonRw_bn_beqi___negative()
{
Given_HexString("207C68");
AssertCode( // bn.beqi? r3,-0x1,0010001A
"0|T--|00100000(3): 1 instructions",
"1|T--|if (r3 == -1<i32>) branch 0010001A");
}

[Test]
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