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来自wiki
Intel SSE4 consists of 54 instructions. A subset consisting of 47 instructions, referred to as SSE4.1 in some Intel documentation, is available in Penryn. Additionally, SSE4.2, a second subset consisting of the 7 remaining instructions, is first available in Core i7 (formerly Nehalem). Intel, unusually, credits feedback from developers as playing an important role in the development of the instruction set.
AMD currently only supports 4 instructions from the SSE4 instruction set, but have also added two new SSE instructions that it named SSE4a. These instructions are not found in Intel's processors supporting SSE4.1 and alternatively AMD processors are not supporting Intel's SSE4.1. |
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