Targeting a Processor

The -tpp{n} (Linux*) or /G{n} (Windows*) option optimizes your application's performance for specific Intel processors. This option generates code that is tuned for the processor associated with its version. For example:

• -tpp7 (Linux) or /G7 (Windows) generates code optimized for running on Intel® Pentium® 4, Intel® Xeon™, Intel® Pentium® M processors, and Intel® Pentium® 4 processors with Streaming SIMD Extensions 3 (SSE3) instruction support.

• -tpp2 (Linux) or /G2 (Windows) generates code optimized for running on Itanium® 2 processors.

The -tpp{n} (Linux) or /G{n} (Windows) option always generates code that is backwards compatible with Intel® processors of the same family. This means that code generated with -tpp7 (Linux) or /G7 (Windows) will run correctly on Pentium Pro or Pentium III processors, possibly just not quite as fast as if the code had been compiled with -tpp6 (Linux) or /G6 (Windows). Similarly, code generated with -tpp2 (Linux) or /G2 (Windows) will run correctly on Itanium processor, but possibly not quite as fast as if it had been generated with -tpp1 (Linux) or /G1 (Windows).

Options for IA-32 Processors

The -tpp5, -tpp6, and -tpp7 (Linux) or /G5, /G6, and /G7 (Windows) options optimize your application's performance for a specific Intel® IA-32 processor.

The resulting binaries will also run correctly on any of the processors mentioned in the table.

For more information about the options listed in the table above, see the following topic:

• tpp5,tpp6,tpp7,G5,G6,G7 compiler options

The invocations listed below each result in a compiled binary of the source program prog.f optimized for Pentium 4 and Intel® Xeon™ processors by default. The same binary will also run on Pentium, Pentium Pro, Pentium II, and Pentium III processors.

The following examples demonstrate using the default options to target a processor:

Options for Itanium® Processors

The -tpp1 and -tpp2 (Linux) or /G1 and /G2 (Windows) options optimize your application's performance for an Itanium® processor.

For more information about the options listed in the table above, see the following topic:

• tpp1,tpp2,G1,G2 compiler options

The following invocation results in a compiled binary of the source program optimized for the Itanium® 2 processor by default. The same binary will also run on Itanium processors: