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sSSE3
鎖定
sSSE3定義
SSSE3 （S
sSSE3
sSSE3指令集
SSE3裝載了用一個命令一口氣處理複數個數據的“SIMD”的處理方式，特別在處理語音和動畫關聯上能夠高速地發揮力量。SSSE3是在SSE3命令的基礎上又添加了32個新命令的產品，其原名為TNI，是SSE4指令集的子集,包含有13條命令。SSSE3也是比較先進的指令集。
SSSE3 包含了 16 個新的不同於 SSE3 的指令。每一個都能夠運作於 64 位元的 MMX 暫存器或是 128 位元 XMM 暫存器之中。因此，有些 Intel 的文件表示有 32 個新指令。之前的 SIMD 指令由舊排到新依序是 MMX、3DNow!（AMD 開發的）、SSE、3DNow! Professional、SSE2與SSE3。
sSSE3處理器
Intel：
Xeon 5100 系列
Xeon 5300 系列
Xeon 3000 系列
Core i7
Core i5
Pentium Dual-Core
Celeron 4xx 的 Conroe-L
Celeron Dual Core 系列
Celeron M 500 系列
VIA：
sSSE3新增的指令
In the table below, satsw(X) (read as 'saturate to signed word')takes a signed integer X, and converts it to -32768 if it's less than-32768, to +32767 if it's greater than 32767, and leaves it unchangedotherwise. As normal for the Intel architecture, bytes are 8 bits,words 16 bits, and dwords 32 bits; 'register' refers to an MMX or XMMvector register.
PSIGNB, PSIGNW, PSIGND
| Packed Sign
| Negate the elements of a register of bytes, words or dwords if thesign of the corresponding elements of another register is negative.
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PABSB, PABSW, PABSD
| Packed Absolute Value
| Fill the elements of a register of bytes, words or dwords with the absolute values of the elements of another register
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PALIGNR
| Packed Align Right
| take two registers, concatenate their values, and pull out aregister-length section from an offset given by an immediate valueencoded in the instruction.
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PSHUFB
| Packed Shuffle Bytes
| takes registers of bytes A = [a0 a1 a2 ...] and B = [b0 b1 b2 ...] and replaces A with [ab0 ab1 ab2 ...]; except that it replaces the ith entry with 0 if the top bit of bi is set.
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PMULHRSW
| Packed Multiply High with Round and Scale
| treat the sixteen-bit words in registers A and B as signed 15-bitfixed-point numbers between -1 and 1 (eg 0x4000 is treated as 0.5 and0xa000 as -0.75), and multiply them together with correct rounding.
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PMADDUBSW
| Multiply and Add Packed Signed and Unsigned Bytes
| Take the bytes in registers A and B, multiply them together, addpairs, signed-saturate and store. IE [a0 a1 a2 ...] pmaddubsw [b0 b1 b2...] = [satsw(a0b0+a1b1) satsw(a2b2+a3b3) ...]
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PHSUBW, PHSUBD
| Packed Horizontal Subtract (Words or Doublewords)
| takes registers A = [a0 a1 a2 ...] and B = [b0 b1 b2 ...] and outputs [a0-a1 a2-a3 ... b0-b1 b2-b3 ...]
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PHSUBSW
| Packed Horizontal Subtract and Saturate Words
| like PHSUBW, but outputs [satsw(a0-a1) satsw(a2-a3) ... satsw(b0-b1) satsw(b2-b3) ...]
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PHADDW, PHADDD
| Packed Horizontal Add (Words or Doublewords)
| takes registers A = [a0 a1 a2 ...] and B = [b0 b1 b2 ...] and outputs [a0+a1 a2+a3 ... b0+b1 b2+b3 ...]
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PHADDSW
| Packed Horizontal Add and Saturate Words
| like PHADDW, but outputs [satsw(a0+a1) satsw(a2+a3) ... satsw(b0+b1) satsw(b2+b3) ...]
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