s_mul128By32.c File Reference

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

Include dependency graph for s_mul128By32.c:

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Functions
struct uint128	softfloat_mul128By32 (uint64_t a64, uint64_t a0, uint32_t b)

Function Documentation

softfloat_mul128By32()

struct uint128 softfloat_mul128By32	(	uint64_t	a64,
		uint64_t	a0,
		uint32_t	b )

Definition at line 43 of file s_mul128By32.c.

{
    struct uint128 z;
    uint_fast64_t mid;
    uint_fast32_t carry;
 
    z.v0 = a0 * b;
    mid = (uint_fast64_t) (uint32_t) (a0>>32) * b;
    carry = (uint32_t) ((uint_fast32_t) (z.v0>>32) - (uint_fast32_t) mid);
    z.v64 = a64 * b + (uint_fast32_t) ((mid + carry)>>32);
    return z;
 
}