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removed assembly code

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VitorBoss 2016-10-13 14:51:51 -03:00 committed by GitHub
parent 1f6169ecef
commit eb0f2b0cb9
1 changed files with 0 additions and 22 deletions
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22
math.h
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@ -17,28 +17,6 @@ int fastMap1023toX(unsigned long x, int out_max)
return (x * out_max) >> 10; return (x * out_max) >> 10;
} }
/*
//Unsigned int assembly multiply, result in 20 clocks
//Need speed test
unsigned long hwdu16(unsigned int x, unsigned int y){
unsigned long result;
asm("mul _y, _x"); //arg1l * arg2l - >
asm("movw _result+2, r0");
asm("movf _y+1,_x+1");//arg1h * arg2h - >
asm("movw _result, r0");
asm("mul _y, _x+1"); //arg1l * arg2h - >
asm("add _result+2,r0");//add cross
asm("adc _result+1,r1");//products
asm("clr r0");
asm("adc _result,r0");
asm("mul _y+1, _x"); //arg1h * arg2l - >
asm("add _result+2,r0");//add cross
asm("adc _result+1,r1");//products
asm("clr r0");
asm("adc _result,r0");
return(result);
}*/
/* /*
The following are all fast versions of specific divisions The following are all fast versions of specific divisions
Ref: http://www.hackersdelight.org/divcMore.pdf Ref: http://www.hackersdelight.org/divcMore.pdf