The DDK3790 tool chain fails when the PAUSE instruction is assembled: error A2085: instruction or register not accepted in current CPU mode The solution is to use the .686 directive along with the .xmm directive.
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Scott Duplichan <[email protected]> --- Index: UefiCpuPkg/CpuDxe/Ia32/MpAsm.asm =================================================================== --- UefiCpuPkg/CpuDxe/Ia32/MpAsm.asm (revision 17108) +++ UefiCpuPkg/CpuDxe/Ia32/MpAsm.asm (working copy) @@ -11,7 +11,8 @@ ; ;------------------------------------------------------------------------------ -.586p +.686 +.xmm .model flat, C extern mTopOfApCommonStack:DWORD
08.patch
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