參數(shù)資料
型號(hào): Intel387 sx
廠商: Intel Corp.
英文描述: SX Math Coprocessor(32位數(shù)學(xué)協(xié)處理器)
中文描述: 山西數(shù)學(xué)協(xié)處理器(32位數(shù)學(xué)協(xié)處理器)
文件頁(yè)數(shù): 42/47頁(yè)
文件大?。?/td> 443K
代理商: INTEL387 SX
Intel387
TM
SX MATH COPROCESSOR
Encoding
Clock Count Range
32-Bit
Integer
Instruction
Byte 0
Byte 1
Optional
Bytes 2–6
32-Bit
Real
64-Bit
Real
16-Bit
Integer
DATA TRANSFER
FLD
e
Load
a
Integer/real memory to ST(0)
ESC MF 1
MOD 000 R/M
SIB/DISP
11–20
28–44
20–27
42–53
Long integer memory to ST(0)
ESC 111
MOD 101 R/M
SIB/DISP
30–58
Extended real memory to ST(0)
ESC 011
MOD 101 R/M
SIB/DISP
16–47
BCD memory to ST(0)
ESC 111
MOD 100 R/M
SIB/DISP
49–101
ST(i) to ST(0)
ESC 001
11000 ST(i)
7–12
FST
e
Store
ST(0) to integer/real memory
ESC MF 1
MOD 010 R/M
SIB/DISP
27–45
59–78
59
58–76
ST(0) to ST(i)
ESC 101
11010 ST(i)
7–11
FSTP
e
Store and Pop
ST(0) to integer/real memory
ESC MF 1
MOD 011 R/M
SIB/DISP
27–45
59–78
59
58–76
ST(0) to long integer memory
ESC 111
MOD 111 R/M
SIB/DISP
64–86
ST(0) to extended real memory
ESC 011
MOD 111 R/M
SIB/DISP
50–56
ST(0) to BCD memory
ESC 111
MOD 110 R/M
SIB/DISP
116–194
ST(0) to ST(i)
ESC 101
11011 ST (i)
7–11
FXCH
e
Exchange
ST(i) and ST(0)
ESC 001
11001 ST(i)
10–17
COMPARISON
FCOM
e
Compare
Integer/real memory to ST(0)
ESC MF 0
MOD 010 R/M
SIB/DISP
15–27
36–54
18–31
39–62
ST(i) to ST(0)
ESC 000
11010 ST(i)
13–21
FCOMP
e
Compare and pop
Integer/real memory to ST(0)
ESC MF 0
MOD 011 R/M
SIB/DISP
15–27
36–54
18–31
39–62
ST(i) to ST(0)
ESC 000
11011 ST(i)
13–21
FCOMPP
e
Compare and pop twice
ST(1) to ST(0)
ESC 110
1101 1001
13–21
FTST
e
Test ST(0)
ESC 001
1110 0100
17–25
FUCOM
e
Unordered compare
ESC 101
11100 ST(i)
13–21
FUCOMP
e
Unordered compare
and pop
ESC 101
11101 ST(i)
13–21
FUCOMPP
e
Unordered compare
and pop twice
ESC 010
1110 1001
13–21
FXAM
e
Examine ST(0)
ESC 001
1110 0101
24-37
Shaded areas indicate instructions not available in 8087/80287.
NOTE:
a. When loading single or double precision zero from memory, add 5 clocks.
42
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