s_mul128To256M.c File Reference

#include <stdint.h>
#include "platform.h"
#include "primitives.h"

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Macros
#define	softfloat_mul128To256M   softfloat_mul128To256M

Functions
void	softfloat_mul128To256M (uint64_t a64, uint64_t a0, uint64_t b64, uint64_t b0, uint64_t *zPtr)

Macro Definition Documentation

softfloat_mul128To256M

#define softfloat_mul128To256M   softfloat_mul128To256M

Definition at line 42 of file s_mul128To256M.c.

Function Documentation

softfloat_mul128To256M()

void softfloat_mul128To256M	(	uint64_t	a64,
		uint64_t	a0,
		uint64_t	b64,
		uint64_t	b0,
		uint64_t *	zPtr )

Definition at line 46 of file s_mul128To256M.c.

{
    struct uint128 p0, p64, p128;
    uint_fast64_t z64, z128, z192;
 
    p0 = softfloat_mul64To128( a0, b0 );
    zPtr[indexWord( 4, 0 )] = p0.v0;
    p64 = softfloat_mul64To128( a64, b0 );
    z64 = p64.v0 + p0.v64;
    z128 = p64.v64 + (z64 < p64.v0);
    p128 = softfloat_mul64To128( a64, b64 );
    z128 += p128.v0;
    z192 = p128.v64 + (z128 < p128.v0);
    p64 = softfloat_mul64To128( a0, b64 );
    z64 += p64.v0;
    zPtr[indexWord( 4, 1 )] = z64;
    p64.v64 += (z64 < p64.v0);
    z128 += p64.v64;
    zPtr[indexWord( 4, 2 )] = z128;
    zPtr[indexWord( 4, 3 )] = z192 + (z128 < p64.v64);
 
}

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