參數(shù)資料
型號: 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)
文件頁數(shù): 44/47頁
文件大?。?/td> 443K
代理商: INTEL387 SX
Intel387
TM
SX MATH COPROCESSOR
Encoding
Clock Count Range
Instruction
Byte 0
Byte 1
Optional
Bytes 2–6
32-Bit
Real
32-Bit
Integer
64-Bit
Real
16-Bit
Integer
CONSTANTS
FLDZ
e
Load
a
0.0 to ST(0)
ESC 001
1110 1110
10–17
FLD1
e
Load
a
1.0 to ST(0)
ESC 001
1110 1000
15–22
FLDPI
e
Load
q
to ST(0)
ESC 001
1110 1011
26–36
FLDL2T
e
Load log
2
(10) to ST(0)
ESC 001
1110 1001
26–36
FLDL2E
e
Load log
2
(e) to ST(0)
ESC 001
1110 1010
26–36
FLDLG2
e
Load log
10
(2) to ST(0)
ESC 001
1110 1100
25–35
FLDLN2
e
Load log
e
(2) to ST(0)
ESC 001
1110 1101
26–38
PROCESSOR CONTROL
FINIT
e
Initialize Math CoProcessor
ESC 011
1110 0011
33
FLDCW
e
Load control word from memory
ESC 001
MOD 101 R/M
SIB/DISP
19
FSTCW
e
Store control word to memory
ESC 001
MOD 111 R/M
SIB/DISP
15
FSTSW
e
Store status word to memory
ESC 101
MOD 111 R/M
SIB/DISP
15
FSTSW AX
e
Store status word to AX
ESC 111
1110 0000
13
FCLEX
e
Clear exceptions
ESC 011
1110 0010
11
FSTENV
e
Store environment
ESC 001
MOD 110 R/M
SIB/DISP
117–118
FLDENV
e
Load environment
ESC 001
MOD 100 R/M
SIB/DISP
85
FSAVE
e
Save state
ESC 101
MOD 110 R/M
SIB/DISP
402–403
FRSTOR
e
Restore state
ESC 101
MOD 100 R/M
SIB/DISP
415
FINCSTP
e
Increment stack pointer
ESC 001
1111 0111
21
FDECSTP
e
Decrement stack pointer
ESC 001
1111 0110
22
FFREE
e
Free ST(i)
ESC 101
1100 0 ST(i)
18
FNOP
e
No operations
ESC 001
1101 0000
12
44
44
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