The integer arithmetic operations for Streaming SIMD Extensions 2 are listed in the following table followed by their descriptions. The packed arithmetic intrinsics for Streaming SIMD Extensions 2 are listed in the Floating-point Arithmetic Operations topic.
| Intrinsic | Instruction | Operation |
|---|---|---|
|
_mm_add_epi8 |
PADDB |
Addition |
|
_mm_add_epi16 |
PADDW |
Addition |
|
_mm_add_epi32 |
PADDD |
Addition |
|
_mm_add_si64 |
PADDQ |
Addition |
|
_mm_add_epi64 |
PADDQ |
Addition |
|
_mm_adds_epi8 |
PADDSB |
Addition |
|
_mm_adds_epi16 |
PADDSW |
Addition |
|
_mm_adds_epu8 |
PADDUSB |
Addition |
|
_mm_adds_epu16 |
PADDUSW |
Addition |
|
_mm_avg_epu8 |
PAVGB |
Computes Average |
|
_mm_avg_epu16 |
PAVGW |
Computes Average |
|
_mm_madd_epi16 |
PMADDWD |
Multiplication/Addition |
|
_mm_max_epi16 |
PMAXSW |
Computes Maxima |
|
_mm_max_epu8 |
PMAXUB |
Computes Maxima |
|
_mm_min_epi16 |
PMINSW |
Computes Minima |
|
_mm_min_epu8 |
PMINUB |
Computes Minima |
|
_mm_mulhi_epi16 |
PMULHW |
Multiplication |
|
_mm_mulhi_epu16 |
PMULHUW |
Multiplication |
|
_mm_mullo_epi16 |
PMULLW |
Multiplication |
|
_mm_mul_su32 |
PMULUDQ |
Multiplication |
|
_mm_mul_epu32 |
PMULUDQ |
Multiplication |
|
_mm_sad_epu8 |
PSADBW |
Computes Difference/Adds |
|
_mm_sub_epi8 |
PSUBB |
Subtraction |
|
_mm_sub_epi16 |
PSUBW |
Subtraction |
|
_mm_sub_epi32 |
PSUBD |
Subtraction |
|
_mm_sub_si64 |
PSUBQ |
Subtraction |
|
_mm_sub_epi64 |
PSUBQ |
Subtraction |
|
_mm_subs_epi8 |
PSUBSB |
Subtraction |
|
_mm_subs_epi16 |
PSUBSW |
Subtraction |
|
_mm_subs_epu8 |
PSUBUSB |
Subtraction |
|
_mm_subs_epu16 |
PSUBUSW |
Subtraction |
__m128i _mm_add_epi8 (__m128i a,__m128i b )
Adds the 16 signed or unsigned 8-bit integers in a to the 16 signed or unsigned 8-bit integers in b.
r0 := a0 + b0
r1 := a1 + b1
...
r15 := a15 + b15
__m128i _mm_add_epi16 ( __m128i a, __m128i b)
Adds the 8 signed or unsigned 16-bit integers in a to the 8 signed or unsigned 16-bit integers in b.
r0 := a0 + b0
r1 := a1 + b1
...
r7 := a7 + b7
__m128i _mm_add_epi32 ( __m128i a, __m128i b)
Adds the 4 signed or unsigned 32-bit integers in a to the 4 signed or unsigned 32-bit integers in b.
r0 := a0 + b0
r1 := a1 + b1
r2 := a2 + b2
r3 := a3 + b3
__m64 _mm_add_si64 (__m64 a, __m64 b)
Adds the signed or unsigned 64-bit integer a to the signed or unsigned 64-bit integer b.
r := a + b
__m128i _mm_add_epi64 ( __m128i a, __m128i b)
Adds the 2 signed or unsigned 64-bit integers in a to the 2 signed or unsigned 64-bit integers in b.
r0 := a0 + b0
r1 := a1 + b1
__m128i _mm_adds_epi8 ( __m128i a, __m128i b)
Adds the 16 signed 8-bit integers in a to the 16 signed 8-bit integers in b using saturating arithmetic.
r0 := SignedSaturate(a0 + b0)
r1 := SignedSaturate(a1 + b1)
...
r15 := SignedSaturate(a15 + b15)
__m128i _mm_adds_epi16 ( __m128i a, __m128i b)
Adds the 8 signed 16-bit integers in a to the 8 signed 16-bit integers in b using saturating arithmetic.
r0 := SignedSaturate(a0 + b0)
r1 := SignedSaturate(a1 + b1)
...
r7 := SignedSaturate(a7 + b7)
__m128i _mm_adds_epu8 ( __m128i a, __m128i b)
Adds the 16 unsigned 8-bit integers in a to the 16 unsigned 8-bit integers in b using saturating arithmetic.
r0 := UnsignedSaturate(a0 + b0)
r1 := UnsignedSaturate(a1 + b1)
...
r15 := UnsignedSaturate(a15 + b15)
__m128i _mm_adds_epu16 ( __m128i a, __m128i b)
Adds the 8 unsigned 16-bit integers in a to the 8 unsigned 16-bit integers in b using saturating arithmetic.
r0 := UnsignedSaturate(a0 + b0)
r1 := UnsignedSaturate(a1 + b1)
...
r15 := UnsignedSaturate(a7 + b7)
__m128i _mm_avg_epu8 ( __m128i a, __m128i b)
Computes the average of the 16 unsigned 8-bit integers in a and the 16 unsigned 8-bit integers in b and rounds.
r0 := (a0 + b0) / 2
r1 := (a1 + b1) / 2
...
r15 := (a15 + b15) / 2
__m128i _mm_avg_epu16 ( __m128i a, __m128i b)
Computes the average of the 8 unsigned 16-bit integers in a and the 8 unsigned 16-bit integers in b and rounds.
r0 := (a0 + b0) / 2
r1 := (a1 + b1) / 2
...
r7 := (a7 + b7) / 2
__m128i _mm_madd_epi16 ( __m128i a, __m128i b)
Multiplies the 8 signed 16-bit integers from a by the 8 signed 16-bit integers from b. Adds the signed 32-bit integer results pairwise and packs the 4 signed 32-bit integer results.
r0 := (a0 * b0) + (a1 * b1)
r1 := (a2 * b2) + (a3 * b3)
r2 := (a4 * b4) + (a5 * b5)
r3 := (a6 * b6) + (a7 * b7)
__m128i _mm_max_epi16 ( __m128i a, __m128i b)
Computes the pairwise maxima of the 8 signed 16-bit integers from a and the 8 signed 16-bit integers from b.
r0 := max(a0, b0)
r1 := max(a1, b1)
...
r7 := max(a7, b7)
__m128i _mm_max_epu8 ( __m128i a, __m128i b)
Computes the pairwise maxima of the 16 unsigned 8-bit integers from a and the 16 unsigned 8-bit integers from b.
r0 := max(a0, b0)
r1 := max(a1, b1)
...
r15 := max(a15, b15)
__m128i _mm_min_epi16 ( __m128i a, __m128i b)
Computes the pairwise minima of the 8 signed 16-bit integers from a and the 8 signed 16-bit integers from b.
r0 := min(a0, b0)
r1 := min(a1, b1)
...
r7 := min(a7, b7)
__m128i _mm_min_epu8 ( __m128i a, __m128i b)
Computes the pairwise minima of the 16 unsigned 8-bit integers from a and the 16 unsigned 8-bit integers from b.
r0 := min(a0, b0)
r1 := min(a1, b1)
...
r15 := min(a15, b15)
__m128i _mm_mulhi_epi16 ( __m128i a, __m128i b)
Multiplies the 8 signed 16-bit integers from a by the 8 signed 16-bit integers from b. Packs the upper 16-bits of the 8 signed 32-bit results.
r0 := (a0 * b0)[31:16]
r1 := (a1 * b1)[31:16]
...
r7 := (a7 * b7)[31:16]
__m128i _mm_mulhi_epu16 ( __m128i a, __m128i b)
Multiplies the 8 unsigned 16-bit integers from a by the 8 unsigned 16-bit integers from b. Packs the upper 16-bits of the 8 unsigned 32-bit results.
r0 := (a0 * b0)[31:16]
r1 := (a1 * b1)[31:16]
...
r7 := (a7 * b7)[31:16]
__m128i _mm_mullo_epi16 ( __m128i a, __m128i b)
Multiplies the 8 signed or unsigned 16-bit integers from a by the 8 signed or unsigned 16-bit integers from b. Packs the lower 16-bits of the 8 signed or unsigned 32-bit results.
r0 := (a0 * b0)[15:0]
r1 := (a1 * b1)[15:0]
...
r7 := (a7 * b7)[15:0]
__m64 _mm_mul_su32 (__m64 a, __m64 b)
Multiplies the lower 32-bit integer from a by the lower 32-bit integer from b, and returns the 64-bit integer result.
r := a0 * b0
__m128i _mm_mul_epu32 ( __m128i a, __m128i b)
Multiplies 2 unsigned 32-bit integers from a by 2 unsigned 32-bit integers from b. Packs the 2 unsigned 64-bit integer results.
r0 := a0 * b0
r1 := a2 * b2
__m128i _mm_sad_epu8 ( __m128i a, __m128i b)
Computes the absolute difference of the 16 unsigned 8-bit integers from a and the 16 unsigned 8-bit integers from b. Sums the upper 8 differences and lower 8 differences, and packs the resulting 2 unsigned 16-bit integers into the upper and lower 64-bit elements.
r0 := abs(a0 - b0) + abs(a1 - b1) +...+ abs(a7 - b7)
r1 := 0x0 ; r2 := 0x0 ; r3 := 0x0
r4 := abs(a8 - b8) + abs(a9 - b9) +...+ abs(a15 - b15)
r5 := 0x0 ; r6 := 0x0 ; r7 := 0x0
__m128i _mm_sub_epi8 ( __m128i a, __m128i b)
Subtracts the 16 signed or unsigned 8-bit integers of b from the 16 signed or unsigned 8-bit integers of a.
r0 := a0 - b0
r1 := a1 - b1
...
r15 := a15 - b15
__m128i _mm_sub_epi16 ( __m128i a, __m128i b)
Subtracts the 8 signed or unsigned 16-bit integers of b from the 8 signed or unsigned 16-bit integers of a.
r0 := a0 - b0
r1 := a1 - b1
...
r7 := a7 - b7
__m128i _mm_sub_epi32 ( __m128i a, __m128i b)
Subtracts the 4 signed or unsigned 32-bit integers of b from the 4 signed or unsigned 32-bit integers of a.
r0 := a0 - b0
r1 := a1 - b1
r2 := a2 - b2
r3 := a3 - b3
__m64 _mm_sub_si64 (__m64 a, __m64 b)
Subtracts the signed or unsigned 64-bit integer b from the signed or unsigned 64-bit integer a.
r := a - b
__m128i _mm_sub_epi64 ( __m128i a, __m128i b)
Subtracts the 2 signed or unsigned 64-bit integers in b from the 2 signed or unsigned 64-bit integers in a.
r0 := a0 - b0
r1 := a1 - b1
__m128i _mm_subs_epi8 ( __m128i a, __m128i b)
Subtracts the 16 signed 8-bit integers of b from the 16 signed 8-bit integers of a using saturating arithmetic.
r0 := SignedSaturate(a0 - b0)
r1 := SignedSaturate(a1 - b1)
...
r15 := SignedSaturate(a15 - b15)
__m128i _mm_subs_epi16 ( __m128i a, __m128i b)
Subtracts the 8 signed 16-bit integers of b from the 8 signed 16-bit integers of a using saturating arithmetic.
r0 := SignedSaturate(a0 - b0)
r1 := SignedSaturate(a1 - b1)
...
r7 := SignedSaturate(a7 - b7)
__m128i _mm_subs_epu8 ( __m128i a, __m128i b)
Subtracts the 16 unsigned 8-bit integers of b from the 16 unsigned 8-bit integers of a using saturating arithmetic.
r0 := UnsignedSaturate(a0 - b0)
r1 := UnsignedSaturate(a1 - b1)
...
r15 := UnsignedSaturate(a15 - b15)
__m128i _mm_subs_epu16 ( __m128i a, __m128i b)
Subtracts the 8 unsigned 16-bit integers of b from the 8 unsigned 16-bit integers of a using saturating arithmetic.
r0 := UnsignedSaturate(a0 - b0)
r1 := UnsignedSaturate(a1 - b1)
...
r7 := UnsignedSaturate(a7 - b7)