![]() SSE (Streaming SIMD Extensions) is the instruction set introduced in PIII one year after Intel released 3D Now! And is a superset of MMX. ![]() Later, Intel developed the SSE instruction set on this basis AMD developed the 3D Now instruction set on this basis. In order to reduce the time spent between MMX and floating-point mode switching, programmers try to reduce the number of mode switching as much as possible, that is to say, these two operations are mutually exclusive in application. The disadvantage is that it takes up floating-point registers for operations (64-bit MMX registers are actually aliases for floating-point registers) so that MMX instructions and floating-point operations cannot work simultaneously. ![]() ![]() MMX is the instruction set introduced by Intel in Pentium MMX. ![]()
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