x86: opsize override prefix not handled for 16-bit MOVSX/MOVZX #6525
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ryanmkurtz
added
Feature: Processor/x86
Status: Triage
ghidracadabra
added
Status: Internal
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The MOVSX/MOVZX constructors with a 16-bit source do not handle the opsize size override prefix (0x66). This PR fixes the following:
660fbfc1 "MOVSX AX,CX" with RAX=0xaaaaaaaa, CX=0xcccc
x86:LE:64:default(Existing): "MOVSX EAX,CX" { RAX=0xffffcccc }x86:LE:64:default(This patch): "MOVSX AX,CX" { RAX=0xaaaacccc }660fb7c1 "MOVZX AX,CX" with RAX=0xaaaaaaaa, CX=0xcccc
x86:LE:64:default(Existing): "MOVZX EAX,CX" { RAX=0x0000cccc }x86:LE:64:default(This patch): "MOVZX AX,CX" { RAX=0xaaaacccc }