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本節介紹支援 SIC/XE 機器架構的組譯程式設計。 SIC/XE 機器的組合語言範例程式及對應的目的碼請見 Figure 2.6(p. 58) 。 PowerPoint PPT Presentation


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本節介紹支援 SIC/XE 機器架構的組譯程式設計。 SIC/XE 機器的組合語言範例程式及對應的目的碼請見 Figure 2.6(p. 58) 。 此程式是將 Figure 2.2 的程式以 SIC/XE 機器的指令改寫而成。 此程式大量的使用 register-to-register 指令來替代原本的 register-to-memory 的指令。 將指令大量改寫為立即定址法的指令。. 2.2 與機器相關的組譯程式特性. 在 SIC/XE 機器的組合語言程式中,「間接定址」指令是在運算元之前加一個「 @ 」符號來表示。

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本節介紹支援 SIC/XE 機器架構的組譯程式設計。 SIC/XE 機器的組合語言範例程式及對應的目的碼請見 Figure 2.6(p. 58) 。

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  • SIC/XE

  • SIC/XE Figure 2.6(p. 58)

    • Figure 2.2SIC/XE

    • register-to-register register-to-memory

2.2


  • SIC/XE@

    • 70 J @RETADR

    • 95 RETADR RESW 1

2.2


  • SIC/XE#

    • 12 LDB #LENGTH

    • 25 COMP #0

    • 55 LDA #3

    • 133 +LDT #4096

2.2


  • (register-to-memory)()

    • BASE

    • ()

2.2


  • 2.2.1SIC/XE(SIC)

  • 2.2.2SIC/XE multiprogramming()

    • SIC/XE

    • ()

2.2


FIX(C416), FLOAT (C016), HIO(F416), TIO(F816)OPTAB()

2.2.1

OP

8


  • register-to-register CLEAR(B416), COMPR(A016)

  • OPTAB

    • 125 RDREC CLEARX

    • 130 CLEARA

    • 132 CLEARS

    • 150 COMPRA, S

2.2.1


  • SYMTAB

    • A(016), X(116), L(216), PC(816), SW (916), B(316), S(416), T(516), F(616)

2.2.1

r1

OP

r2

8

4

4


  • register-to-memory ()

    • (PC)

    • (B)

  • :

2.2.1

OP

n

i

x

b

p

e

disp

6

6

12


    • 20 bitsSIC/XE(1M bytes)

    • address

2.2.1


  • +

  • +()

    • )

2.2.1


  • LineLOCObject code

    15 0006 +JSUB RDREC4B101036

    .

    125 1036REREC CLEAR X

    : JSUB = (48)16

2.2.1

OP

n

i

x

b

p

e

address

6

6

20


  • register-to-memory ?

    • (disp)

    • disp

2.2.1


  • ()

    LineLOCObject code

    10 0000 FIRST STL RETADR17202D

    .

    95 0030RETADR RESW 1

    Disp=(030)16-(003)16= (02D)16 PCdisp

    STL =(14)16

2.2.1


  • ()

    LineLOCObject code

    15 0006 CLOOP +JSUB RDREC

    .

    40 0017J CLOOP 3F2FEC

    Disp=(006)16-(01A)16= (-14)16 PCdisp

    J =(3C)16

2.2.1


  • Line 20 Object code

    LineLOCObject code

    20 000A LDA LENGTH ??????????

    .

    100 0033LENGTHRESW 1

    LDA =(00)16

2.2.1


  • ?

    • (disp)

    • BASE TA

    • () NOBASE

2.2.1


  • ()

    LineLOCObject code

    12 0003 LDB #LENGTH69202D

    13 BASE LENGTH

    100 0033 LENGTH RESW 1

    105 0036BUFFER RESB 4096

    160 104E STCH BUFFER,X 57C003

    Disp=(036)16-(033)16= (003)16 Bdisp

    STCH =(54)16

2.2.1


  • ()

    LineLOCObject code

    12 0003 LDB #LENGTH69202D

    13 BASE LENGTH

    100 0033 LENGTH RESW 1

    175 104E EXIT STX LENGTH134000

    Disp=(033)16-(033)16= (000)16 Bdisp

    STX =(10)16

2.2.1


LineLOCObject code

12 0003 LDB #LENGTH 69202D

55 0020 LDA #3 010003

133 103C +LDT #4096 75101000

100 0033 LENGTH RESW 1

LDA =(00)16 LDB =(68)16 LDT =(74)16

2.2.1


LineLOCObject code

70 002A J @RETADR3E2003

95 0030 RETADR RESW 1

J =(3C)16

2.2.1


PROG1 START 0

LDS #3

+LDT #3072

CLEAR X

ADDLP +LDA ALPHA,X

+ADD BETA,X

+STA GAMMA,X

ADDR S,X

COMPR X, T

JLT ADDLP

RSUB

ALPHA RESW 1024

BETA RESW 1024

GAMA RESW 1024

END PROG1


PROG1 START 0

LDS #3

+LDT #3072

CLEAR X

ADDLP +LDA ALPHA,X

+ADD BETA,X

+STA GAMMA,X

ADDR S,X

COMPR X, T

JLT ADDLP

RSUB

ALPHA RESW 1024

BETA RESW 1024

GAMA RESW 1024

END PROG1

LOC

(0000)16

(0003)16

(0007)16

(0009)16

(000D)16

(0011)16

(0015)16

(0017)16

(0019)16

(001C)16

(001F)16

(0C1F)16

(181F)16


PROG1 START 0

LDS #3

+LDT #3072

CLEARX

ADDLP +LDA ALPHA,X

+ADD BETA,X

+STA GAMMA,X

ADDRS,X

COMPRX, T

JLT ADDLP

RSUB

ALPHA RESW 1024

BETA RESW 1024

GAMA RESW 1024

END PROG1

Object code

(6D0003)16

(75100C00)16

(B410)16

(0390001F)16

(1B900C1F)16

(0F90181F)16

(9041)16

(A015)16

(3B2FED)16

(4F0000)16


SUM START 0

FIRST LDX #0

LDA #0

+LDB #TABLE2

BASE TABLE2

LOOP ADD TABLE,X

ADD TABLE2,X

TIX COUNT

JLT LOOP

+STA TOTAL

RSUB

COUNT RESW 1

TABLE RESW 2000

TABLE2 RESW 2000

TOTAL RESW 1

END FIRST


SUM START 0

FIRSTLDX #0

LDA #0

+LDB #TABLE2

BASE TABLE2

LOOPADD TABLE,X

ADD TABLE2,X

TIX COUNT

JLT LOOP

+STA TOTAL

RSUB

COUNT RESW 1

TABLE RESW 2000

TABLE2 RESW 2000

TOTAL RESW 1

END FIRST

LOC

(0000)16

(0003)16

(0006)16

(000A)16

(000D)16

(0010)16

(0013)16

(0016)16

(001A)16

(001D)16

(0020)16

(1790)16

(2F00)16


SUM START 0

FIRST LDX #0

LDA #0

+LDB #TABLE2

BASE TABLE2

LOOP ADD TABLE,X

ADD TABLE2,X

TIX COUNT

JLT LOOP

+STA TOTAL

RSUB

COUNT RESW 1

TABLE RESW 2000

TABLE2 RESW 2000

TOTAL RESW 1

END FIRST

Object code

(050000)16

(010000)16

(69101790)16

(1BA013)16

(1BC000)16

(2F200A)16

(3B2FF4)16

(0F102F00)16

(4F0000)16


()

2.2, page 55 & 58

2.2.1


2.2.2

  • (I/O)

    • (multiprogramming)

    • ()()


2.2.2

    • ()


2.2.2

  • Figure 2.6 (P. 58)

  • 50007420:

    • 5 0000 COPY START 0

    • .

    • 15 0006 CLOOP +JSUB RDREC(4B101036)

    • .

    • 125 1036 RDREC CLEAR X (B410)


2.7

1036+5000

1036+7420


2.2.2

  • RDREC1036bytes

    • 15 CLOOP +JSUB RDREC ()

    • ()(COPY)

    • 15 CLOOP +JSUB RDREC(4B101036)


2.2.2

  • ()

    • ()

    • (relocatable program)

  • ?

    • ()


2.2.2

  • ()

    • SIC/XE

    • SIC RSUB

  • SIC/XE(Figure 2.6, P. 58):

    • LineLocSource StatementObject code

    • 15 0006 CLOOP +JSUB RDREC 4B101036

    • 40 0013 +JSUB WRREC 4B10105D

    • 65 0026 +JSUB WRREC 4B10105D


1M

2716

8916

JSUB

M00000705


2.82.6


2.2.2

  • SIC(Figure 2.2, P. 47)COPY0?

  • 31:

    • Line 10~70

    • Line 125~175

    • Line 210~240


  • :

    • ()

2.2.2


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