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- FCMOV abstract "FCMOV is a floating point conditional move opcode of the Intel x86 architecture, first introduced in Pentium Pro processors. It copies the contents of one of the floating point stack register, depending on the contents of EFLAGS integer flag register, to the ST(0) (top of stack) register. There are 8 variants of the instruction selected by the condition codes that need be set for the instruction to perform the move.Similar to the CMOV instruction, FCMOV allows to perform some conditional operations without the usual branching overhead. However, it has a higher latency than conditional branch instructions. Therefore, it is most useful for simple yet unpredictable comparison or conditional operations, where it can provide substantial performance gains.The instruction is usually used with the FCOMI instruction or the FCOM-FSTSW-SAHF idiom to set the relevant condition codes based on the result of a floating point comparison.".
- FCMOV wikiPageExternalLink optimize.
- FCMOV wikiPageExternalLink 243191.htm.
- FCMOV wikiPageID "9262813".
- FCMOV wikiPageRevisionID "526195198".
- FCMOV hasPhotoCollection FCMOV.
- FCMOV subject Category:X86_instructions.
- FCMOV type Abstraction100002137.
- FCMOV type Communication100033020.
- FCMOV type Direction106786629.
- FCMOV type Message106598915.
- FCMOV type X86Instructions.
- FCMOV comment "FCMOV is a floating point conditional move opcode of the Intel x86 architecture, first introduced in Pentium Pro processors. It copies the contents of one of the floating point stack register, depending on the contents of EFLAGS integer flag register, to the ST(0) (top of stack) register.".
- FCMOV label "FCMOV".
- FCMOV sameAs m.02822zg.
- FCMOV sameAs Q5424761.
- FCMOV sameAs Q5424761.
- FCMOV sameAs FCMOV.
- FCMOV wasDerivedFrom FCMOV?oldid=526195198.
- FCMOV homepage 243191.htm.
- FCMOV isPrimaryTopicOf FCMOV.