__wmmintrin_pclmul.h File Reference

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Macros
#define	_mm_clmulepi64_si128(X, Y, I)
	Multiplies two 64-bit integer values, which are selected from source operands using the immediate-value operand.

Macro Definition Documentation

_mm_clmulepi64_si128

#define _mm_clmulepi64_si128	(		X,
			Y,
			I
	)

Value:

  ((__m128i)__builtin_ia32_pclmulqdq128((__v2di)(__m128i)(X), \
                                        (__v2di)(__m128i)(Y), (char)(I)))

Multiplies two 64-bit integer values, which are selected from source operands using the immediate-value operand.

The multiplication is a carry-less multiplication, and the 128-bit integer product is stored in the destination.

__m128i _mm_clmulepi64_si128(__m128i X, __m128i Y, const int I);

This intrinsic corresponds to the VPCLMULQDQ instruction.

Parameters

X	A 128-bit vector of [2 x i64] containing one of the source operands.
Y	A 128-bit vector of [2 x i64] containing one of the source operands.
I	An immediate value specifying which 64-bit values to select from the operands. Bit 0 is used to select a value from operand X, and bit 4 is used to select a value from operand Y: Bit[0]=0 indicates that bits[63:0] of operand X are used. Bit[0]=1 indicates that bits[127:64] of operand X are used. Bit[4]=0 indicates that bits[63:0] of operand Y are used. Bit[4]=1 indicates that bits[127:64] of operand Y are used.

Returns

The 128-bit integer vector containing the result of the carry-less multiplication of the selected 64-bit values.

Definition at line 44 of file __wmmintrin_pclmul.h.