The prototypes for Streaming SIMD Extensions (SSE) intrinsics are in the xmmintrin.h header file.
The results of each intrinsic operation are placed in a register. This register is illustrated for each intrinsic with R0-R3. R0, R1, R2 and R3 each represent one of the 4 32-bit pieces of the result register.
To see detailed information about an intrinsic, click on that intrinsic name in the following table.
| Intrinsic | Operation | Corresponding SSE Instruction |
|---|---|---|
| _mm_add_ss | Addition | ADDSS |
| _mm_add_ps | Addition | ADDPS |
| _mm_sub_ss | Subtraction | SUBSS |
| _mm_sub_ps | Subtraction | SUBPS |
| _mm_mul_ss | Multiplication | MULSS |
| _mm_mul_ps | Multiplication | MULPS |
| _mm_div_ss | Division | DIVSS |
| _mm_div_ps | Division | DIVPS |
| _mm_sqrt_ss | Squared Root | SQRTSS |
| _mm_sqrt_ps | Squared Root | SQRTPS |
| _mm_rcp_ss | Reciprocal | RCPSS |
| _mm_rcp_ps | Reciprocal | RCPPS |
| _mm_rsqrt_ss | Reciprocal Squared Root | RSQRTSS |
| _mm_rsqrt_ps | Reciprocal Squared Root | RSQRTPS |
| _mm_min_ss | Computes Minimum | MINSS |
| _mm_min_ps | Computes Minimum | MINPS |
| _mm_max_ss | Computes Maximum | MAXSS |
| _mm_max_ps | Computes Maximum | MAXPS |
__m128 _mm_add_ss(__m128 a, __m128 b)
Adds the lower single-precision, floating-point (SP FP) values of a and b; the upper 3 SP FP values are passed through from a.
|
R0 |
R1 | R2 | R3 |
|---|---|---|---|
| a0 + b0 |
a1 |
a2 | a3 |
__m128 _mm_add_ps(__m128 a, __m128 b)
Adds the four SP FP values of a and b.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| a0 +b0 | a1 + b1 | a2 + b2 | a3 + b3 |
__m128 _mm_sub_ss(__m128 a, __m128 b)
Subtracts the lower SP FP values of a and b. The upper 3 SP FP values are passed through from a.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| a0 - b0 | a1 | a2 | a3 |
__m128 _mm_sub_ps(__m128 a, __m128 b)
Subtracts the four SP FP values of a and b.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| a0 - b0 | a1 - b1 | a2 - b2 | a3 - b3 |
__m128 _mm_mul_ss(__m128 a, __m128 b)
Multiplies the lower SP FP values of a and b; the upper 3 SP FP values are passed through from a.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| a0 * b0 | a1 | a2 | a3 |
__m128 _mm_mul_ps(__m128 a, __m128 b)
Multiplies the four SP FP values of a and b.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| a0 * b0 | a1 * b1 | a2 * b2 | a3 * b3 |
__m128 _mm_div_ss(__m128 a, __m128 b )
Divides the lower SP FP values of a and b; the upper 3 SP FP values are passed through from a.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| a0 / b0 | a1 | a2 | a3 |
__m128 _mm_div_ps(__m128 a, __m128 b)
Divides the four SP FP values of a and b.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| a0 / b0 | a1 / b1 | a2 / b2 | a3 / b3 |
__m128 _mm_sqrt_ss(__m128 a)
Computes the square root of the lower SP FP value of a ; the upper 3 SP FP values are passed through.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| sqrt(a0) | a1 | a2 | a3 |
__m128 _mm_sqrt_ps(__m128 a)
Computes the square roots of the four SP FP values of a.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| sqrt(a0) | sqrt(a1) | sqrt(a2) | sqrt(a3) |
__m128 _mm_rcp_ss(__m128 a)
Computes the approximation of the reciprocal of the lower SP FP value of a; the upper 3 SP FP values are passed through.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| recip(a0) | a1 | a2 | a3 |
__m128 _mm_rcp_ps(__m128 a)
Computes the approximations of reciprocals of the four SP FP values of a.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| recip(a0) | recip(a1) | recip(a2) | recip(a3) |
__m128 _mm_rsqrt_ss(__m128 a)
Computes the approximation of the reciprocal of the square root of the lower SP FP value of a; the upper 3 SP FP values are passed through.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| recip(sqrt(a0)) | a1 | a2 | a3 |
__m128 _mm_rsqrt_ps(__m128 a)
Computes the approximations of the reciprocals of the square roots of the four SP FP values of a.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| recip(sqrt(a0)) | recip(sqrt(a1)) | recip(sqrt(a2)) | recip(sqrt(a3)) |
__m128 _mm_min_ss(__m128 a, __m128 b)
Computes the minimum of the lower SP FP values of a and b; the upper 3 SP FP values are passed through from a.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| min(a0, b0) | a1 | a2 | a3 |
__m128 _mm_min_ps(__m128 a, __m128 b)
Computes the minimum of the four SP FP values of a and b.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| min(a0, b0) | min(a1, b1) | min(a2, b2) | min(a3, b3) |
__m128 _mm_max_ss(__m128 a, __m128 b)
Computes the maximum of the lower SP FP values of a and b; the upper 3 SP FP values are passed through from a.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| max(a0, b0) | a1 | a2 | a3 |
__m128 _mm_max_ps(__m128 a, __m128 b)
Computes the maximum of the four SP FP values of a and b.
| R0 | R1 | R2 | R3 |
|---|---|---|---|
| max(a0, b0) | max(a1, b1) | max(a2, b2) | max(a3, b3) |