This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

C51 'in-line' compilation

Hi!

I've a particular module within a large project in which I wish to avoid making jumps to code segments from other modules (including C51 library code).
Is there a means by which I can ensure that the compilation of this module will expand any calls to external code segments 'in-line'? I guess this is more-or-less what happens when optimising for speed, but would appreciate any feedback. (i.e is there a #pragma directive for speed?)

Thanks!

David

Parents

0 Jon Ward over 23 years ago in reply to Andrew Neil

In particular, note that the manual is incorrect when it says that the intrinsic functions are inserted inline: this is not true - they are called just like any other function.

This is only true for the _chkfloat_, _lrol_, and _lror_ functions.

The _crol_, _cror_, _irol_, _iror_, _nop_, and _testbit_ routines are implemented as explicit instructions. For example:

;---- Variable 'i?042' assigned to Register 'R2/R3' ----
;---- Variable 'c?041' assigned to Register 'R1' ----
; {
			; SOURCE LINE # 6
; float f;
; unsigned char c;
; unsigned int i;
; unsigned long l;
; 
; bit b;
; 
; if (_chkfloat_ (f))
			; SOURCE LINE # 14
	MOV  	R7,f?040+03H
	MOV  	R6,f?040+02H
	MOV  	R5,f?040+01H
	MOV  	R4,f?040
	LCALL	?C?CHKFLOAT
	JZ   	?C0001
;   {
			; SOURCE LINE # 15
;   f = 0.0;
			; SOURCE LINE # 16
	CLR  	A
	MOV  	f?040+03H,A
	MOV  	f?040+02H,A
	MOV  	f?040+01H,A
	MOV  	f?040,A
;   }
			; SOURCE LINE # 17
?C0001:
; 
; c = _crol_ (c, 3);
			; SOURCE LINE # 19
	MOV  	R0,#03H
	MOV  	R7,AR1
	MOV  	A,R7
	INC  	R0
	SJMP 	?C0007
?C0006:
	RL   	A
?C0007:
	DJNZ 	R0,?C0006
	MOV  	R1,A
; c = _cror_ (c, 4);
			; SOURCE LINE # 20
	MOV  	R0,#04H
	MOV  	R7,A
	INC  	R0
	SJMP 	?C0009
?C0008:
	RR   	A
?C0009:
	DJNZ 	R0,?C0008
	MOV  	R1,A
; 
; i = _irol_ (i, 3);
			; SOURCE LINE # 22
	MOV  	R0,#03H
	MOV  	R7,AR3
	MOV  	R6,AR2
	MOV  	A,R7
	INC  	R0
	SJMP 	?C0011
?C0010:
	RLC  	A
	XCH  	A,R6
	RLC  	A
	XCH  	A,R6
	MOV  	ACC.0,C
?C0011:
	DJNZ 	R0,?C0010
	MOV  	R2,AR6
	MOV  	R3,A
; i = _iror_ (i, 4);
			; SOURCE LINE # 23
	MOV  	R0,#04H
	MOV  	R7,A
	INC  	R0
	SJMP 	?C0013
?C0012:
	MOV  	C,ACC.0
	XCH  	A,R6
	RRC  	A
	XCH  	A,R6
	RRC  	A
?C0013:
	DJNZ 	R0,?C0012
	MOV  	R2,AR6
	MOV  	R3,A
; 
; l = _lrol_ (l, 3);
			; SOURCE LINE # 25
	MOV  	R7,l?043+03H
	MOV  	R6,l?043+02H
	MOV  	R5,l?043+01H
	MOV  	R4,l?043
	MOV  	R0,#03H
	LCALL	?C?LROL
	MOV  	l?043+03H,R7
	MOV  	l?043+02H,R6
	MOV  	l?043+01H,R5
	MOV  	l?043,R4
; l = _lror_ (l, 4);
			; SOURCE LINE # 26
	MOV  	R0,#04H
	LCALL	?C?LROR
	MOV  	l?043+03H,R7
	MOV  	l?043+02H,R6
	MOV  	l?043+01H,R5
	MOV  	l?043,R4
; 
; _nop_ ();
			; SOURCE LINE # 28
	NOP  	
; 
; if (_testbit_ (b))
			; SOURCE LINE # 30
	JBC  	b?044,?C0015
	SJMP 	?C0003
?C0015:
;   {
			; SOURCE LINE # 31
;   b = 1;
			; SOURCE LINE # 32
	SETB 	b?044
;   }
			; SOURCE LINE # 33
?C0003:
; 
; while (1);
			; SOURCE LINE # 35
	SJMP 	?C0003
; END OF main

Jon

Reply

0 Jon Ward over 23 years ago in reply to Andrew Neil

;---- Variable 'i?042' assigned to Register 'R2/R3' ----
;---- Variable 'c?041' assigned to Register 'R1' ----
; {
			; SOURCE LINE # 6
; float f;
; unsigned char c;
; unsigned int i;
; unsigned long l;
; 
; bit b;
; 
; if (_chkfloat_ (f))
			; SOURCE LINE # 14
	MOV  	R7,f?040+03H
	MOV  	R6,f?040+02H
	MOV  	R5,f?040+01H
	MOV  	R4,f?040
	LCALL	?C?CHKFLOAT
	JZ   	?C0001
;   {
			; SOURCE LINE # 15
;   f = 0.0;
			; SOURCE LINE # 16
	CLR  	A
	MOV  	f?040+03H,A
	MOV  	f?040+02H,A
	MOV  	f?040+01H,A
	MOV  	f?040,A
;   }
			; SOURCE LINE # 17
?C0001:
; 
; c = _crol_ (c, 3);
			; SOURCE LINE # 19
	MOV  	R0,#03H
	MOV  	R7,AR1
	MOV  	A,R7
	INC  	R0
	SJMP 	?C0007
?C0006:
	RL   	A
?C0007:
	DJNZ 	R0,?C0006
	MOV  	R1,A
; c = _cror_ (c, 4);
			; SOURCE LINE # 20
	MOV  	R0,#04H
	MOV  	R7,A
	INC  	R0
	SJMP 	?C0009
?C0008:
	RR   	A
?C0009:
	DJNZ 	R0,?C0008
	MOV  	R1,A
; 
; i = _irol_ (i, 3);
			; SOURCE LINE # 22
	MOV  	R0,#03H
	MOV  	R7,AR3
	MOV  	R6,AR2
	MOV  	A,R7
	INC  	R0
	SJMP 	?C0011
?C0010:
	RLC  	A
	XCH  	A,R6
	RLC  	A
	XCH  	A,R6
	MOV  	ACC.0,C
?C0011:
	DJNZ 	R0,?C0010
	MOV  	R2,AR6
	MOV  	R3,A
; i = _iror_ (i, 4);
			; SOURCE LINE # 23
	MOV  	R0,#04H
	MOV  	R7,A
	INC  	R0
	SJMP 	?C0013
?C0012:
	MOV  	C,ACC.0
	XCH  	A,R6
	RRC  	A
	XCH  	A,R6
	RRC  	A
?C0013:
	DJNZ 	R0,?C0012
	MOV  	R2,AR6
	MOV  	R3,A
; 
; l = _lrol_ (l, 3);
			; SOURCE LINE # 25
	MOV  	R7,l?043+03H
	MOV  	R6,l?043+02H
	MOV  	R5,l?043+01H
	MOV  	R4,l?043
	MOV  	R0,#03H
	LCALL	?C?LROL
	MOV  	l?043+03H,R7
	MOV  	l?043+02H,R6
	MOV  	l?043+01H,R5
	MOV  	l?043,R4
; l = _lror_ (l, 4);
			; SOURCE LINE # 26
	MOV  	R0,#04H
	LCALL	?C?LROR
	MOV  	l?043+03H,R7
	MOV  	l?043+02H,R6
	MOV  	l?043+01H,R5
	MOV  	l?043,R4
; 
; _nop_ ();
			; SOURCE LINE # 28
	NOP  	
; 
; if (_testbit_ (b))
			; SOURCE LINE # 30
	JBC  	b?044,?C0015
	SJMP 	?C0003
?C0015:
;   {
			; SOURCE LINE # 31
;   b = 1;
			; SOURCE LINE # 32
	SETB 	b?044
;   }
			; SOURCE LINE # 33
?C0003:
; 
; while (1);
			; SOURCE LINE # 35
	SJMP 	?C0003
; END OF main

Jon

Children

0 David Fussell over 23 years ago in reply to Jon Ward

Okay. The lib. functions that my 'c' module require are LSTIDATA ,LLDIDATA and similar, they aren't inlined when the CODE(SPEED) option is specified. I guess my only means of inlining these is to do it manually.

Thanks for your comments.

David
Cancel
Vote up 0 Vote down

Cancel
0 Andy Neil over 23 years ago in reply to Jon Ward

This is only true for the _chkfloat_, _lrol_, and _lror_ functions.

Guess which ones I was using, then... ;-)

When will the manual be corrected?
Cancel
Vote up 0 Vote down

Cancel
0 Jon Ward over 23 years ago in reply to David Fussell

Those routines are helper routines and they are not included inline. Refer to

http://www.keil.com/support/docs/1964.htm

for a little more information about what the routines do and how to "decode" the function names.

Jon
Cancel
Vote up 0 Vote down

Cancel