-march=ivybridge
Generate instructions for Intel's Ivy Bridge CPU.
In contrast to -mtune=cpu-type, which merely tunes
the generated code for the specified cpu-type,
-march=cpu-type allows GCC to generate code that may
not run at all on processors other than the one
indicated. Specifying -march=cpu-type implies
-mtune=cpu-type.
Intel Ivy Bridge CPU with 64-bit extensions,
MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2,
POPCNT, AVX, AES, PCLMUL, FSGSBASE, RDRND and
F16C instruction set support.
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