AMD K5

3-20 Software Environment and Extensions
AMD-K5 Processor Technical Reference Manual 18524C/0—Nov1996
Table 3-5E. Instructions that Modify the IF or VIF Flags—Protected Mode Virtual
Interrupt Extensions (PVI)
1
TYPE PE VM VME PVI IOPL GP(0) IF VIF
CLI 1 0 —1 3NoIF ← 0No Change
CLI 1 0 — 1 < 3 No No Change VIF ← 0
STI 1 0 — 1 3 No IF ← 1No Change
STI 1 0 — 1 < 3
No
3
No Change VIF ← 1
PUSHF 1 0 — 1 3 No Pushed Not Pushed
PUSHF 1 0 — 1 < 3 No Pushed Not Pushed
PUSHFD 1 0 — 1 3 No Pushed Pushed
PUSHFD 1 0 — 1 < 3 No Pushed Pushed
POPF 1 0 — 1 3 No Popped Not Popped
POPF 1 0 — 1 < 3 No Not Popped Not Popped
POPFD 1 0 — 1 3 No Popped Not Popped
POPFD 1 0 — 1 < 3 No Not Popped Not Popped
IRETD
2
10—1—
No
3
Popped Popped
Notes:
1. All Protected mode virtual interrupt tasks run at CPL = 3.
2. All protected mode virtual interrupt handlers run at CPL = 0.
3. GP(0) if an attempt is made to set VIF when VIP = 1.
— Not applicable.