# Arithmetic Operations for Streaming SIMD Extensions

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

Intrinsic Instruction Operation R0 R1 R2 R3
_mm_sub_ss SUBSS Subtraction a0 [op] b0 a1 a2 a3
_mm_sub_ps SUBPS Subtraction a0 [op] b0 a1 [op] b1 a2 [op] b2 a3 [op] b3
_mm_mul_ss MULSS Multiplication a0 [op] b0 a1 a2 a3
_mm_mul_ps MULPS Multiplication a0 [op] b0 a1 [op] b1 a2 [op] b2 a3 [op] b3
_mm_div_ss DIVSS Division a0 [op] b0 a1 a2 a3
_mm_div_ps DIVPS Division a0 [op] b0 a1 [op] b1 a2 [op] b2 a3 [op] b3
_mm_sqrt_ss SQRTSS Squared Root [op] a0 a1 a2 a3
_mm_sqrt_ps SQRTPS Squared Root [op] a0 [op] b1 [op] b2 [op] b3
_mm_rcp_ss RCPSS Reciprocal [op] a0 a1 a2 a3
_mm_rcp_ps RCPPS Reciprocal [op] a0 [op] b1 [op] b2 [op] b3
_mm_rsqrt_ss RSQRTSS Reciprocal Square Root [op] a0 a1 a2 a3
_mm_rsqrt_ps RSQRTPS Reciprocal Squared Root [op] a0 [op] b1 [op] b2 [op] b3
_mm_min_ss MINSS Computes Minimum [op]( a0,b0) a1 a2 a3
_mm_min_ps MINPS Computes Minimum [op]( a0,b0) [op] (a1, b1) [op] (a2, b2) [op] (a3, b3)
_mm_max_ss MAXSS Computes Maximum [op]( a0,b0) a1 a2 a3
_mm_max_ps MAXPS Computes Maximum [op]( a0,b0) [op] (a1, b1) [op] (a2, b2) [op] (a3, b3)

Adds the lower SP FP (single-precision, floating-point) values of a and b; the upper 3 SP FP values are passed through from a.
r0 := a0 + b0
r1 := a1 ; r2 := a2 ; r3 := a3

Adds the four SP FP values of a and b.
r0 := a0 + b0
r1 := a1 + b1
r2 := a2 + b2
r3 := 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 := a0 - b0
r1 := a1 ; r2 := a2 ; r3 := a3

__m128 _mm_sub_ps(__m128 a, __m128 b)

Subtracts the four SP FP values of a and b.
r0 := a0 - b0
r1 := a1 - b1
r2 := a2 - b2
r3 := 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 := a0 * b0
r1 := a1 ; r2 := a2 ; r3 := a3

__m128 _mm_mul_ps(__m128 a, __m128 b)

Multiplies the four SP FP values of a and b.
r0 := a0 * b0
r1 := a1 * b1
r2 := a2 * b2
r3 := 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 := a0 / b0
r1 := a1 ; r2 := a2 ; r3 := a3

__m128 _mm_div_ps(__m128 a, __m128 b)

Divides the four SP FP values of a and b.
r0 := a0 / b0
r1 := a1 / b1
r2 := a2 / b2
r3 := 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 := sqrt(a0)
r1 := a1 ; r2 := a2 ; r3 := a3

__m128 _mm_sqrt_ps(__m128 a)

Computes the square roots of the four SP FP values of a.
r0 := sqrt(a0)
r1 := sqrt(a1)
r2 := sqrt(a2)
r3 := 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 := recip(a0)
r1 := a1 ; r2 := a2 ; r3 := a3

__m128 _mm_rcp_ps(__m128 a)

Computes the approximations of reciprocals of the four SP FP values of a.
r0 := recip(a0)
r1 := recip(a1)
r2 := recip(a2)
r3 := 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 := recip(sqrt(a0))
r1 := a1 ; r2 := a2 ; r3 := 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 := recip(sqrt(a0))
r1 := recip(sqrt(a1))
r2 := recip(sqrt(a2))
r3 := 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 := min(a0, b0)
r1 := a1 ; r2 := a2 ; r3 := a3

__m128 _mm_min_ps(__m128 a, __m128 b)

Computes the minimum of the four SP FP values of a and b.
r0 := min(a0, b0)
r1 := min(a1, b1)
r2 := min(a2, b2)
r3 := 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 := max(a0, b0)
r1 := a1 ; r2 := a2 ; r3 := a3

__m128 _mm_max_ps(__m128 a, __m128 b)

Computes the maximum of the four SP FP values of a and b.
r0 := max(a0, b0)
r1 := max(a1, b1)
r2 := max(a2, b2)
r3 := max(a3, b3)