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Perform a 32- by 32-bit multiply to produce a 64-bit result.


void umulExtended( genUType x, genUType y, out genUType msb, out genUType lsb );
void imulExtended( genIType x, genIType y, out genIType msb, out genIType lsb );


x - Specifies the first multiplicand.
y - Specifies the second multiplicand..
msb - Specifies the variable to receive the most significant word of the product.
lsb - Specifies the variable to receive the least significant word of the product.


 umulExtended and imulExtended perform multiplication of the two 32-bit integer quantities x and y , producing a 64-bit integer result. The 32 least significant bits of this product are returned in lsb and the 32 most significant bits are returned in msb . umulExtended and imulExtended perform unsigned and signed multiplication, respectively.

Version Support[edit]

umulExtended 4.0+

See Also[edit]



Copyright© 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999.