Quote:
Originally Posted by e*clipse
Also - what does this do? - the "bultin_mulss" part?? 
(_builtin_mulss(Vd, sin_theta_times32768)
- E*clipse |
Quote:
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Built-in functions that are specific to 16-bit devices, that give the C programmer access to assembler operators or machine instructions that are currently only accessible using inline assembly, but are sufficiently useful that they are applicable to a broad range of applications. Built-in functions are coded in C source files syntactically like function calls, but they are compiled to assembly code that directly implements the function, and do not involve function calls or library routines.
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Code:
__builtin_mulss
Description:
Computes the product p0 x p1.
Function arguments are signed integers, and the function result is a signed long integer.
The command-line option -Wconversions can be used to detect unexpected sign conversions.
Prototype: signed long __builtin_mulss(const signed int p0, const signed int p1);
Argument: p0 multiplicand
p1 multiplier
Return Value: Returns the signed long integer value of the product p0 x p1.
Assembler Operator / Machine Instruction: mul.s
- Daniel