N386SX Просмотр технического описания (PDF) - Intel

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производитель

N386SX

Intel387™ SX MATH COPROCESSOR

Intel 

Intel387TM SX MATH COPROCESSOR

Instruction

CONSTANTS

FLDZ e Load a0 0 to ST(0)

FLD1 e Load a1 0 to ST(0)

FLDPI e Load q to ST(0)

FLDL2T e Load log2(10) to ST(0)

FLDL2E e Load log2(e) to ST(0)

FLDLG2 e Load log10(2) to ST(0)

FLDLN2 e Load loge(2) to ST(0)

PROCESSOR CONTROL

FINIT e Initialize Math CoProcessor

FLDCW e Load control word from memory

FSTCW e Store control word to memory

FSTSW e Store status word to memory

FSTSW AX e Store status word to AX

FCLEX e Clear exceptions

FSTENV e Store environment

FLDENV e Load environment

FSAVE e Save state

FRSTOR e Restore state

FINCSTP e Increment stack pointer

FDECSTP e Decrement stack pointer

FFREE e Free ST(i)

FNOP e No operations

Byte 0

ESC 001

ESC 001

ESC 001

ESC 001

ESC 001

ESC 001

ESC 001

ESC 011

ESC 001

ESC 001

ESC 101

ESC 111

ESC 011

ESC 001

ESC 001

ESC 101

ESC 101

ESC 001

ESC 001

ESC 101

ESC 001

Encoding

Byte 1

Optional

Bytes 2 – 6

32-Bit

Real

Clock Count Range

32-Bit

Integer

64-Bit

Real

16-Bit

Integer

1110 1110

1110 1000

1110 1011

1110 1001

1110 1010

1110 1100

1110 1101

10 – 17

15 – 22

26 – 36

26 – 36

26 – 36

25 – 35

26 – 38

1110 0011

MOD 101 R M

MOD 111 R M

MOD 111 R M

1110 0000

1110 0010

MOD 110 R M

MOD 100 R M

MOD 110 R M

MOD 100 R M

1111 0111

1111 0110

1100 0 ST(i)

1101 0000

SIB DISP

SIB DISP

SIB DISP

SIB DISP

SIB DISP

SIB DISP

SIB DISP

33

19

15

15

13

11

117 – 118

85

402 – 403

415

21

22

18

12

44

44

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