8087 Coprocessor Instruction Set; Data Transfer - IBM XT 5160 Technical Reference

8087 Coprocessor Instruction Set
The following is an instruction set summary for the 8087
coprocessor. In the following, the bit pattern for escape is 11011.
MF = Memory format
rIm
Operand Address
00 - 32-bit Real
000
(BX)
+
(S I)
+
DISP
01 - 32-bit Integer 001
(BX)
+
(D I )
+
DISP
10 - 64-bit Real
010
(BP)
+
(S I )
+
DISP
11 - 64-bit Integer
all
(BP)
+
(D I )
+
DISP
100 (S I)
+
DISP
101 (D I )
+
DISP
110 (BP)
+
DISP*
100
(BX)
+
DISP
DISP follows 2nd byte of instruction (before data if required)
*except if mod=OO and r/m-110 then EA=disp-high: disp-low.
Data Transfer
FLD
=
Load
Integer/Real Memory to ST(O)
escape MF 1 mod 000 rIm disp-low
Long Integer Memory to ST(O)
escape 111 mod 101 rIm
disp-low
Temporary Real Memory to ST(O)
escape
all
mod 101 rIm disp-low
BCD Memory to ST(O)
disp-high
disp-high
disp-high
escape 111 mod 100 rIm disp-low disp-high
ST(i) to ST(O)
escape 001 11000ST(i)
6-24 Instruction Set