Code Generation/Example 1 - Revision history

Root: /* Postfix Code */

2021-05-14T06:58:02Z

Postfix Code

← Older revision		Revision as of 06:58, 14 May 2021
Line 36:		Line 36:
	;-- while cycle:		;-- while cycle:
	LABEL "while"		LABEL "while"
	~~LOCV~~ -4 ; n		LOCAL -4 ; &n
			LDINT
	DUP32 ; n (because of n--)		DUP32 ; n (because of n--)
	INT 1		INT 1
	SUB ; n-1		SUB ; n-1
	~~LOCA~~ -4 ; n = n-1		LOCAL -4
			STINT ; n = n-1
	INT 0		INT 0
	GT ; n > 0 (n before decrement)		GT ; n > 0 (n before decrement)
	JZ "endwhile"		JZ "endwhile"
	~~LOCV~~ -8 ; i		LOCAL -8 ; &i
	~~LOCV~~ -12 ; j		LDINT ; i
			LOCAL -12 ; &j
			LDINT ; j
	ADD ; i+j		ADD ; i+j
	DUP32 ; same value (for assignment)		DUP32 ; same value (for assignment)
	~~LOCV~~ -16 ; seg		LOCAL -16 ; &seg
			LDINT ; seg
	STINT ; *seg = i+j		STINT ; *seg = i+j
	CALL "print" ; we assume that "print" does not return any value		CALL "print" ; we assume that "print" does not return any value
Line 54:		Line 59:

	;-- compute trenary operator's value		;-- compute trenary operator's value
	~~LOCV~~ -16 ; seg		LOCAL -16 ; &seg
			LDINT ; seg
	LOCAL -8 ; &i		LOCAL -8 ; &i
	EQ ; seg == &i		EQ ; seg == &i
Line 66:		Line 72:
	LABEL "end3"		LABEL "end3"
	DUP32 ; trenary operator's value (duplicated because of assignment)		DUP32 ; trenary operator's value (duplicated because of assignment)
	~~LOCA~~ -16 ; seg = (seg == &i) ? &j : &i		LOCAL -16
			STINT ; seg = (seg == &i) ? &j : &i
	TRASH 4 ; trash assignment's value, since we used it as an instruction		TRASH 4 ; trash assignment's value, since we used it as an instruction

2020-05-06T22:26:26Z

Postfix Code

← Older revision		Revision as of 22:26, 6 May 2020
Line 35:		Line 35:

	;-- while cycle:		;-- while cycle:
	~~ALIGN~~
	LABEL "while"		LABEL "while"
	LOCV -4 ; n		LOCV -4 ; n
Line 62:		Line 61:
	JMP "end3" ; jump to end of trenary operator		JMP "end3" ; jump to end of trenary operator

	~~ALIGN~~
	LABEL "false3"		LABEL "false3"
	LOCAL -8 ; &i		LOCAL -8 ; &i

	~~ALIGN~~
	LABEL "end3"		LABEL "end3"
	DUP32 ; trenary operator's value (duplicated because of assignment)		DUP32 ; trenary operator's value (duplicated because of assignment)
Line 74:		Line 71:
	JMP "while" ; restart while cycle		JMP "while" ; restart while cycle

	~~ALIGN~~
	LABEL "endwhile"		LABEL "endwhile"

2019-02-12T11:31:39Z

← Older revision		Revision as of 11:31, 12 February 2019
Line 2:		Line 2:

	Consider the following C function:		Consider the following C function:
	<c>		<source lang="c">
	int main() {		int main() {
	int n = 45, i = 0, j = 1, *seg = &i;		int n = 45, i = 0, j = 1, *seg = &i;
Line 11:		Line 11:
	return 0;		return 0;
	}		}
	</c>		</source>

	== Postfix Code ==		== Postfix Code ==
Line 17:		Line 17:
	The Postfix code for the above function is as follows:		The Postfix code for the above function is as follows:
	{{CollapsedCode\|Postfix code\|		{{CollapsedCode\|Postfix code\|
	<asm>		<source lang="asm">
	TEXT		TEXT
	ALIGN		ALIGN
Line 82:		Line 82:
	LEAVE		LEAVE
	RET		RET
	</~~asm~~>		</source>
	}}		}}

	[[category:Compiladores]]		[[category:Compiladores]]
	[[category:Ensino]]		[[category:Ensino]]

2018-05-01T22:22:54Z

Postfix Code

← Older revision		Revision as of 22:22, 1 May 2018
Line 38:		Line 38:
	LABEL "while"		LABEL "while"
	LOCV -4 ; n		LOCV -4 ; n
	~~DUP~~ ; n (because of n--)		DUP32 ; n (because of n--)
	INT 1		INT 1
	SUB ; n-1		SUB ; n-1
Line 48:		Line 48:
	LOCV -12 ; j		LOCV -12 ; j
	ADD ; i+j		ADD ; i+j
	~~DUP~~ ; same value (for assignment)		DUP32 ; same value (for assignment)
	LOCV -16 ; seg		LOCV -16 ; seg
	~~STORE~~ ; *seg = i+j		STINT ; *seg = i+j
	CALL "print" ; we assume that "print" does not return any value		CALL "print" ; we assume that "print" does not return any value
	TRASH 4 ; trash argument (int)		TRASH 4 ; trash argument (int)
Line 68:		Line 68:
	ALIGN		ALIGN
	LABEL "end3"		LABEL "end3"
	~~DUP~~ ; trenary operator's value (duplicated because of assignment)		DUP32 ; trenary operator's value (duplicated because of assignment)
	LOCA -16 ; seg = (seg == &i) ? &j : &i		LOCA -16 ; seg = (seg == &i) ? &j : &i
	TRASH 4 ; trash assignment's value, since we used it as an instruction		TRASH 4 ; trash assignment's value, since we used it as an instruction
Line 79:		Line 79:
	;-- rest of function		;-- rest of function
	INT 0		INT 0
	~~POP~~ ; return value is 0		STFVAL32 ; return value is 0
	LEAVE		LEAVE
	RET		RET

2017-05-09T07:26:35Z

Postfix Code

← Older revision		Revision as of 07:26, 9 May 2017
Line 16:		Line 16:

	The Postfix code for the above function is as follows:		The Postfix code for the above function is as follows:
			{{CollapsedCode\|Postfix code\|
	<asm>		<asm>
	TEXT		TEXT
Line 82:		Line 83:
	RET		RET
	</asm>		</asm>
			}}

	[[category:Compiladores]]		[[category:Compiladores]]
	[[category:Ensino]]		[[category:Ensino]]

2015-05-07T18:27:38Z

Postfix Code

2015-04-06T14:29:43Z

2009-05-28T21:55:35Z

Postfix Code

← Older revision		Revision as of 21:55, 28 May 2009
Line 34:		Line 34:

	;-- while cycle:		;-- while cycle:
			ALIGN
	LABEL "while"		LABEL "while"
	LOCV -4 ; n		LOCV -4 ; n
Line 59:		Line 60:
	LOCAL -12 ; &j		LOCAL -12 ; &j
	JMP "end3" ; jump to end of trenary operator		JMP "end3" ; jump to end of trenary operator

			ALIGN
	LABEL "false3"		LABEL "false3"
	LOCAL -8 ; &i		LOCAL -8 ; &i

			ALIGN
	LABEL "end3"		LABEL "end3"
	DUP ; trenary operator's value (duplicated because of assignment)		DUP ; trenary operator's value (duplicated because of assignment)
Line 67:		Line 72:

	JMP "while" ; restart while cycle		JMP "while" ; restart while cycle

			ALIGN
	LABEL "endwhile"		LABEL "endwhile"

2009-05-25T07:26:37Z

Postfix Code

← Older revision		Revision as of 07:26, 25 May 2009
Line 15:		Line 15:
	== Postfix Code ==		== Postfix Code ==

			The Postfix code for the above function is as follows:
	<asm>		<asm>
	TEXT		TEXT

2009-05-25T07:26:15Z

The Original Code

← Older revision		Revision as of 07:26, 25 May 2009
Line 1:		Line 1:
	== The Original Code ==		== The Original Code ==

	~~Translate into Postfix~~ the following C function.		Consider the following C function:
	<c>		<c>
	int main() {		int main() {