_MulHigh, _MulUnsignedHigh
9/7/2007
This function returns the high-order 32-bit result of multiplying two arguments.
Syntax
long __cdecl _MulHigh(
long arg1,
long arg2
);
unsigned long __cdecl _MulUnsignedHigh(
unsigned long arg1,
unsigned long arg2
);
Parameters
- arg1
[in] The first argument in the product.
- arg2
[in] The second argument in the product.
Return Values
The long integer result of multiplying arg1 and arg2.
Remarks
This function can be useful for detecting overflow. _MulHigh is useful for multiplying integers scaled to represent [-0.5..0.5), and _MulUnsignedHigh is useful for multiplying integers scaled to represent 0..1).
Requirements
| Routine | Required header | Architecture |
|---|---|---|
_MulHigh |
<cmnintrin.h> |
x86, ARM, SH-4, MIPS |
_MulUnsignedHigh |
<cmnintrin.h> |
x86, ARM, SH-4, MIPS |