forked from NJU-ProjectN/i386-manual
-
Notifications
You must be signed in to change notification settings - Fork 0
/
SAHF.htm
57 lines (41 loc) · 1.14 KB
/
SAHF.htm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<HTML>
<HEAD>
<TITLE>80386 Programmer's Reference Manual -- Opcode SAHF</TITLE>
</HEAD>
<BODY>
<B>up:</B> <A HREF="c17.htm">
Chapter 17 -- 80386 Instruction Set</A><BR>
<B>prev:</B><A HREF="RET.htm"> RET Return from Procedure</A><BR>
<B>next:</B><A HREF="SAL.htm"> SAL/SAR/SHL/SHR Shift Instructions</A>
<P>
<HR>
<P>
<H1>SAHF -- Store AH into Flags</H1>
<PRE>
Opcode Instruction Clocks Description
9E SAHF 3 Store AH into flags SF ZF xx AF xx PF xx CF
</PRE>
<H2>Operation</H2>
<PRE>
SF:ZF:xx:AF:xx:PF:xx:CF := AH;
</PRE>
<H2>Description</H2>
SAHF loads the flags listed above with values from the AH register,
from bits 7, 6, 4, 2, and 0, respectively.
<H2>Flags Affected</H2>
SF, ZF, AF, PF, and CF as described above
<H2>Protected Mode Exceptions</H2>
None
<H2>Real Address Mode Exceptions</H2>
None
<H2>Virtual 8086 Mode Exceptions</H2>
None
<P>
<HR>
<P>
<B>up:</B> <A HREF="c17.htm">
Chapter 17 -- 80386 Instruction Set</A><BR>
<B>prev:</B><A HREF="RET.htm"> RET Return from Procedure</A><BR>
<B>next:</B><A HREF="SAL.htm"> SAL/SAR/SHL/SHR Shift Instructions</A>
</BODY>