MMX™ Technology Set Intrinsics

The prototypes for MMX™ technology intrinsics are in the mmintrin.h header file.

In the descriptions regarding the bits of the MMX register, bit 0 is the least significant and bit 63 is the most significant.

Intrinsic Name	Operation	Corresponding MMX Instruction
_mm_setzero_si64	set to zero	PXOR
_mm_set_pi32	set integer values	Composite
_mm_set_pi16	set integer values	Composite
_mm_set_pi8	set integer values	Composite
_mm_set1_pi32	set integer values	Composite
_mm_set1_pi16	set integer values	Composite
_mm_set1_pi8	set integer values	Composite
_mm_setr_pi32	set integer values	Composite
_mm_setr_pi16	set integer values	Composite
_mm_setr_pi8	set integer values	Composite

__m64 _mm_setzero_si64()

Sets the 64-bit value to zero.

R
0x0

__m64 _mm_set_pi32(int i1, int i0)

Sets the 2 signed 32-bit integer values.

R0	R1
i0	i1

__m64 _mm_set_pi16(short s3, short s2, short s1, short s0)

Sets the 4 signed 16-bit integer values.

R0	R1	R2	R3
w0	w1	w2	w3

__m64 _mm_set_pi8(char b7, char b6, char b5, char b4, char b3, char b2, char b1, char b0)

Sets the 8 signed 8-bit integer values.

R0	R1	...	R7
b0	b1	...	b7

__m64 _mm_set1_pi32(int i)

Sets the 2 signed 32-bit integer values to i.

R0	R1
i	i

__m64 _mm_set1_pi16(short s)

Sets the 4 signed 16-bit integer values to w.

R0	R1	R2	R3
w	w	w	w

__m64 _mm_set1_pi8(char b)

Sets the 8 signed 8-bit integer values to b.

R0	R1	...	R7
b	b	...	b

__m64 _mm_setr_pi32(int i1, int i0)

Sets the 2 signed 32-bit integer values in reverse order.

R0	R1
i1	i0

__m64 _mm_setr_pi16(short s3, short s2, short s1, short s0)

Sets the 4 signed 16-bit integer values in reverse order.

R0	R1	R2	R3
w3	w2	w1	w0

__m64 _mm_setr_pi8(char b7, char b6, char b5, char b4, char b3, char b2, char b1, char b0)

Sets the 8 signed 8-bit integer values in reverse order.

R0	R1	...	R7
b7	b6	...	b0