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Fixed NEG instruction tests with SIB byte encoding. When using SIB byte with Base=101 (EBP) and Mod=00, it requires a 32-bit displacement. Replaced incorrect encodings with proper ones for [eax] addressing.

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bird_egop 2025-04-16 20:37:46 +03:00
parent d2279f4720
commit 72ad1c0d90
1 changed files with 11 additions and 2 deletions
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13
X86DisassemblerTests/TestData/neg_tests.csv
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@ -19,6 +19,15 @@ F7DE;[{ "Type": "Neg", "Operands": ["esi"] }]
F7DF;[{ "Type": "Neg", "Operands": ["edi"] }] F7DF;[{ "Type": "Neg", "Operands": ["edi"] }]
# NEG with memory operands # NEG with memory operands
F61C25;[{ "Type": "Neg", "Operands": ["byte ptr [eax]"] }]
F71C25;[{ "Type": "Neg", "Operands": ["dword ptr [eax]"] }] # SPECIAL CASE: When using SIB byte with Base=101 (EBP) and Mod=00, it requires a 32-bit displacement
# The correct encoding for "NEG byte ptr [eax]" would be F618 (with Mod=00, R/M=0 for EAX)
# F61C25;[{ "Type": "Neg", "Operands": ["byte ptr [eax]"] }]
F618;[{ "Type": "Neg", "Operands": ["byte ptr [eax]"] }]
# The correct encoding for "NEG dword ptr [eax]" would be F718 (with Mod=00, R/M=0 for EAX)
# F71C25;[{ "Type": "Neg", "Operands": ["dword ptr [eax]"] }]
F718;[{ "Type": "Neg", "Operands": ["dword ptr [eax]"] }]
# This test case is correct, as it includes the required displacement
F71C2510000000;[{ "Type": "Neg", "Operands": ["dword ptr [eax+0x10]"] }] F71C2510000000;[{ "Type": "Neg", "Operands": ["dword ptr [eax+0x10]"] }]

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