The following conversion intrinsics and their respective instructions are functional in the Streaming SIMD Extensions 2 (SSE2).
For detailed information about an intrinsic, click on that intrinsic name in the following table.
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. R, R0, R1, R2 and R3 represent the registers in which results are placed.
The prototypes for SSE2 intrinsics are in the emmintrin.h header file.
| Intrinsic Name | Operation | Instruction |
|---|---|---|
| _mm_cvtsi32_si128 | Move and zero | MOVD |
| _mm_cvtsi64_si128 | Move and zero | MOVQ |
| _mm_cvtsi128_si32 | Move lowest 32 bits | MOVD |
| _mm_cvtsi128_si64 | Move lowest 64 bits | MOVQ |
__m128i _mm_cvtsi32_si128(int a)
Moves 32-bit integer a to the least significant 32 bits of an __m128i object. Zeroes the upper 96 bits of the __m128i object.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| a | 0x0 | 0x0 | 0x0 |
__m128i _mm_cvtsi64_si128(__int64 a)
Moves 64-bit integer a to the lower 64 bits of an __m128i object, zeroing the upper bits.
| R0 | R1 |
|---|---|
| a | 0x0 |
int _mm_cvtsi128_si32(__m128i a)
Moves the least significant 32 bits of a to a 32-bit integer.
| R |
|---|
| a0 |
__int64 _mm_cvtsi128_si64(__m128i a)
Moves the lower 64 bits of a to a 64-bit integer.
| R |
|---|
| a0 |