cranelift::prelude::isa::x64::encoding::evex

Enum EvexContext

pub enum EvexContext {
    RoundingRegToRegFP {
        rc: EvexRoundingControl,
    },
    NoRoundingFP {
        sae: bool,
        length: EvexVectorLength,
    },
    MemoryOp {
        broadcast: bool,
        length: EvexVectorLength,
    },
    Other {
        length: EvexVectorLength,
    },
}
Expand description

Defines the EVEX context for the L', L, and b bits (bits 6:4 of EVEX P2 byte). Table 2-36 in section 2.6.10 (Intel Software Development Manual, volume 2A) describes how these bits can be used together for certain classes of instructions; i.e., special care should be taken to ensure that instructions use an applicable correct EvexContext. Table 2-39 contains cases where opcodes can result in an #UD.

Variants§

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RoundingRegToRegFP

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NoRoundingFP

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§sae: bool
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MemoryOp

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§broadcast: bool
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Other

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impl EvexContext

pub fn bits(&self) -> u8

Encode the L', L, and b bits (bits 6:4 of EVEX P2 byte) for merging with the P2 byte.

Trait Implementations§

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impl Default for EvexContext

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fn default() -> EvexContext

Returns the “default value” for a type. Read more

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