July 2004
Intermediate to advanced
1744 pages
35h 3m
English
Content preview from The Unabridged Pentium 4 IA32 Processor GenealogyBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The SSE2 Instruction Set
General
The 130nm Pentium® 4 processor added 144 new instructions to the IA32 instruction set. The programmer may determine whether a processor supports these instructions by executing a CPUID request type 1 and verifying that EDX[26] = 1 (see Figure 56-6).
Generally, the SSE2 instructions add the following functionality:
A new data type, 64-bit DP FP numbers, has been added.
The programmer can now pack two, 64-bit DP FP numbers (see Figure 56-7 on page 1334) in each of two XMM registers and then perform packed FP operation on them (or between two numbers packed ...
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