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pshufd
sse instructions
Opcode, Mnemonic, Description. 0F F6 /r, PSADBW mm1, mm2/m64, Computes the absolute differences of the packed unsigned byte integers from mm2 /m64 and mm1; differences are then summed to produce an unsigned word integer result. 66 0F F6 /r, PSADBW xmm1, xmm2/m128, Computes the absolute differences of
8 Jun 2012 This has been auto-vectorized but without using thePSADBW instruction which is an available SSE SIMD instruction. Instead, the compiler subtracts 8 elements from the 2 buffers and then does a 2's complement on the parallel registers. PSADBW would obviously be much more optimal as this is an
2 Feb 2015 Opcode/. Op/. 64/32. CPUID. Description. Instruction. En. -bit. Feature. Mode. Flag. 66 0F F6 /r. A. V/V. SSE2. Computes the absolute differ-. PSADBW xmm1, xmm2/m128. ences of the packed unsigned. byte integers from xmm2 /m128. and xmm1; the 8 low differences. and 8 high differences are then.
intel-manual - Programmatic Intel 64 instruction reference XML parser.
Opcode. Instruction. Description. 0F F6 /r. PSADBW mm1, mm2/m64. Absolute difference of packed unsigned byte integers from mm2 /m64 and mm1; differences are then summed to produce an unsigned word integer result. 66 0F F6 /r. PSADBW xmm1, xmm2/m128. Absolute difference of packed unsigned byte integers
16 Nov 2007 SIMD instructions provide an ideal means of optimizing motion estimation because the required arithmetic operations are performed on blocks of pixels with a high degree of parallelism. The Intel SSE2 instruction PSADBW is widely used to optimize this operation. PSADBW computes the sum of absolute
NOTES: 1. See note in Section 2.4, “Instruction Exception Specification" in the Intel® 64 and IA-32 Architectures Software Developer's Manual, Volume 2A and Section 22.25.3, “Exception Conditions of Legacy SIMD Instructions Operating on MMX Registers" in the Intel® 64 and IA-32 Architectures Software Developer's
The SSE 64–bit SIMD integer instructions perform operations on packed bytes, words, or doublewords in MMX registers. Table 3–34 64–Bit SIMD move byte mask. pmulhuw. PMULHUW. multiply packed unsigned integers and store high result. psadbw. PSADBW. compute sum of absolute differences. pshufw. PSHUFW.
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