AMD K5

3-18 Software Environment and Extensions
AMD-K5 Processor Technical Reference Manual 18524C/0—Nov1996
Table 3-5C. Instructions that Modify the IF or VIF Flags—Virtual-8086 Mode
TYPE PE VM VME PVI IOPL GP(0) IF VIF
CLI 110— 3 No IF ← 0 No Change
CLI 110—< 3Yes — —
STI 1 1 0 — 3 No IF ← 1 No Change
STI 1 1 0 — < 3Yes — —
PUSHF 1 1 0 — 3 No Pushed —
PUSHF 110—< 3Yes — —
PUSHFD 1 1 0 — 3 No Pushed Pushed
PUSHFD 110—< 3Yes — —
POPF 1 1 0 — 3 No Popped —
POPF 1 1 0 — < 3Yes — —
POPFD 1 1 0 — 3 No Popped Not Popped
POPFD 1 1 0 — < 3Yes — —
IRETD
2
1 1 0 — — No Popped Popped
Notes:
1. All Virtual-8086 mode tasks run at CPL = 3.
2. All protected virtual interrupt handlers run at CPL = 0.
— Not applicable.