x64 Instructions

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x64 Instructions

Post Number:#1  Postby giv » 01 Feb 2015 12:58

Most x86 instructions continue to be valid for x64 in 64-bit mode. Some rarely-used operations are no longer supported in 64-bit mode, such as:

binary-coded decimal arithmetic instructions: AAA, AAD, AAM, AAS, DAA, DAS

BOUND

PUSHAD and POPAD

most operations that dealt with segment registers, such as PUSH DS and POP DS. (Operations that use the FS or GS segment registers are still valid.)

The x64 instruction set includes recent additions to the x86, such as SSE 2. Programs compiled for x64 can freely use these instructions.

https://msdn.microsoft.com/en-us/library/windows/hardware/ff561500%28v=vs.85%29.aspx
Best regards!
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