哪些CPU支持MOVBE指令? [英] which CPUs support MOVBE instruction?

问题描述

有时，当使用-march=atom进行编译时，GCC会生成此指令.每个Intel Atom CPU是否都支持MOVBE?

Sometimes GCC generates this instruction when compiling with -march=atom. Does each and every Intel Atom CPU support MOVBE?

还有哪些其他处理器支持该指令?我似乎无法在英特尔网站上找到此信息.请帮忙.

What other processors support this instruction? I can't seem to find this information on Intel website. Please help.

推荐答案

该指令最初是英特尔®凌动™处理器所独有的.

This instruction was originally unique to the Intel® Atom™ processor.

从Intel方面:

英特尔®编译器11.0允许您 以英特尔®凌动™处理器为目标 使用/QxSSE3_ATOM或-xSSE3_ATOM 编译器选项.这些选项 启用movbe的生成 唯一的说明 英特尔®凌动™处理器.

The Intel® Compilers 11.0 allow you to target the Intel® Atom™ processor using the /QxSSE3_ATOM or -xSSE3_ATOM compiler options. These options enable the generation of the movbe instruction which is unique to the Intel® Atom™ processor.

在其他微体系结构中( http://instlatx64.atw.hu/，其中包含 https://agner.org/optimize/):

In other microarchitectures (http://instlatx64.atw.hu/ with uop info from https://agner.org/optimize/):

• 主流Intel:Haswell和更高版本.包括Haswell Xeon(Ex-xxxx v3).
  解码为2或3微码，与bswap +加载或存储相同.
• 主流AMD:挖掘机和Ryzen家族. Steamroller和更早版本没有它.
  有效地解码为单个uop.

• Mainstream Intel: Haswell and later. Including Haswell Xeon (Ex-xxxx v3).
  Decodes as 2 or 3 uops, about the same as bswap + load or store.
• Mainstream AMD: Excavator, and Ryzen-family. Steamroller and earlier don't have it.
  Decodes efficiently to a single uop.

非主流CPU:

• 旧版Intel Atom:全部
• 英特尔Silvermont系列故障Atom:全部.有效地解码为单个uop.

• AMD Jaguar.有效地解码为单个uop.

• Legacy in-order Intel Atom: all
• Intel Silvermont-family out-of-order Atom: all. Decodes efficiently to a single uop.

• AMD Jaguar. Decodes efficiently to a single uop.

Intel Xeon Phi:Knight's Landing(基于Silvermont)及更高版本. (也许不在骑士的角落.)

Intel Xeon Phi: Knight's Landing (based on Silvermont) and later. (Maybe not on Knight's corner.)

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