The following table lists the Instruction Sets supported by each processor.
Processor
MMX
Extended MMX
SSE
SSE2
3DNow!
Intel Pentium
Intel Pentium MMX
...
The following table summarizes the latencies of MMX/iSSE instructions on the Intel Pentium III and Pentium 4 processors, and on the AMD Athlon processor:
Instruction
Pentium III
Pentium 4
AMD Athlon
MOVD mm,r32
1...
The MMX technology supports both saturating and wraparound modes. In wraparound mode, results that overflow or underflow are truncated and only the lower (least significant) bits of the result are returned. In saturation mode, results of an...
These instructions generate a mask of ones or zeros which can be used by logical operations to select elements within a register: a developer can implement a packed conditional move operation without a set of branch instructions.
...
There are several cases where elements of packed data may be required to be repositioned within the packed data, or the elements of two packed data operands may need to be merged. There are cases where either input or the desired output...
When stored in memory the bytes, words, and doublewords in the packed data types are stored in consecutive addresses, with the least significant byte, word, or doubleword being stored in the lowest address and the more significant bytes, words,...
The EMMS instruction empties the MMX state. This instruction must be used to clear the MMX state (i.e. empty the floating-point tag word) at the end of an MMX routine before calling other routines that can execute floating-point instructions. If...
This section describes example uses of the MMX instruction set to implement basic coding structures.
Conditional Select
Operating on multiple data operands using a single instruction presents an interesting issue: what happens when a ...
General Support Intrinsics
Intrinsic name Operation Signed Saturation Assembly instruction
_mm_empty
Empties MM state
Not applicable
Not applicable
EMMS
_mm_cvtsi32_si64
Converts from int
Not applicable
Not...
PAND mm, mm/m64 PANDN mm, mm/m64 POR mm, mm/m64 PXOR mm, mm/m64
The PAND (Bitwise Logical And), PANDN (Bitwise Logical And Not), POR (Bitwise Logical OR), and PXOR (Bitwise Logical Exclusive OR) instructions perform bitwise...
The recent arrival of the Intel Pentium 4 processor has generated the usual flurry of benchmarks and comments, most of them emphasizing that current software does not fully exploit the power of this new architecture (click here for an overview...
The MMX technology is designed to accelerate multimedia and communications applications by including new instructions and data types that allow applications to achieve a new level of performance. It exploits the parallelism inherent in many...
The logical shift left, logical shift right and arithmetic shift right instructions shift each element by a specified number of bits. The logical left and right shifts also enable a 64-bit quantity (quadword) to be shifted as one block, assisting...
A new article about using Intel TBB is here. It contains examples using C++ lambdas and joining multi-threaded loops with SIMD code
In this article we will transform a plain C loop into a multi-threaded version using Intel Thread Building Blocks...
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A software no-one asked for
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If you encounter the following error when pulling a repository in SourceTree:
VirtualAlloc pointer is null, Win32 error 487
it is due to to the Cygwin system failing to allocate a 5 MB large chunk of memory for its heap at