Texas Instruments TMS320C3 Series, User Manual, Page: 106 / 166

.loop/.break/.endloop
Assemble Code Block Repeatedly
6-24
Syntax .loop
well-defined expression
.endloop
Description Two directives enable you to repeatedly assemble a block of code:
-
The .loop directive begins a repeatable block of code. The optional ex-
pression evaluates to the loop count (the number of loops to be per-
formed). If there is no expression, the loop count defaults to 246.
-
The .endloop directive terminates a repeatable block of code; it executes
when the number of loops performed equals the loop count given by .loop.
Example This example shows the .loop directive.
;==================================================
; Create an FFT Twiddle table
;==================================================
.start ”TABLES”,0x809A00
.sect ”TABLES”
pi .set 3.1415926
N .set 4
;–––––––––––––––––––––––––;
TR ; REAL twiddles
;–––––––––––––––––––––––––;
.loop N/2
.float cos(($–TR)*pi/N);
.endloop
;–––––––––––––––––––––––––;
TI ; IMAG twiddles ;
;–––––––––––––––––––––––––;
.loop N/2
.float –1*sin(($–TI)*pi/N)
.endloop