Set Intrinsics

The prototypes for Intel® Streaming SIMD Extensions (Intel® SSE) intrinsics for set operations are in the xmmintrin.h header file.

The results of each intrinsic operation are placed in registers. The information about what is placed in each register appears in the tables below, in the detailed explanation of each intrinsic. R0, R1, R2 and R3 represent the registers in which results are placed.

Intrinsic Name	Operation	Corresponding Intel® SSE Instruction
_mm_set_ss	Set the low value and clear the three high values	Composite
_mm_set1_ps	Set all four words with the same value	Composite
_mm_set_ps	Set four values, address aligned	Composite
_mm_setr_ps	Set four values, in reverse order	Composite
_mm_setzero_ps	Clear all four values	Composite

__m128 _mm_set_ss(float w )

Sets the low word of an SP FP value to w and clears the upper three words.

R0	R1	R2	R3
w	0.0	0.0	0.0

__m128 _mm_set1_ps(float w )

Sets the four SP FP values to w.

R0	R1	R2	R3
w	w	w	w

__m128 _mm_set_ps(float z, float y, float x, float w )

Sets the four SP FP values to the four inputs.

R0	R1	R2	R3
w	x	y	z

__m128 _mm_setr_ps (float z, float y, float x, float w )

Sets the four SP FP values to the four inputs in reverse order.

R0	R1	R2	R3
z	y	x	w

__m128 _mm_setzero_ps (void)

Clears the four SP FP values.

R0	R1	R2	R3
0.0	0.0	0.0	0.0