Texas Instruments TMS320C3 Series, User Manual, Page: 77 / 166

Expression Analyzer
5-13 Using the DSK Assembler
Table 5–2. ANSI C Math Library Functions Supported by the DSK Assembler (Continued)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
Function
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Description
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
double log10(double);
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Logarithm (based–10)
ÁÁÁÁÁÁÁÁÁ
Á ÁÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁÁ
double pow10(double);
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á ÁÁÁÁÁÁÁÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
10 raised to the power of a value
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
double sqrt(double);
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Square root
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
double log2(double);
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Logarithm (based–2)
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ÁÁÁÁÁÁÁÁÁ
double pow(double,double);
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
First value raised to the power of the second value
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Á ÁÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁÁ
long br(long, long);
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á ÁÁÁÁÁÁÁÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Align the first value to the next address located by
raising the second value to the power of 2
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Á ÁÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁÁ
long circ(long,long);
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á ÁÁÁÁÁÁÁÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Align the first value to the next address located by
raising the second value to the power of 2
You can generate a table of values using certain assembler directives. To gen-
erate a table of values use the .loop/.endloop directives and the math library
functions listed in Table 5–2. For example, to create the twiddle table for an
FFT, use the following directives:
TWlength .set 16 ; Table size is 16
.brstart ”TwiddleTable”,2*TWlength ; Align to valid br–address
TWstart: ; create label OUTside loop
.loop TWlength ; 16 pairs of complex numbers
.float sin(($–TWStart)*2*pi/TWlength) ; sin(n*pi/N)
.float cos(($–TWStart)*2*pi/TWlength) ; cos(n*pi/N)
.endloop
Table 5–3 shows the operators recognized by the DSK assembler.