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Fix documentation

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This commit is contained in:
Andrew Brown
2019-09-05 09:26:11 -07:00
parent 295b2ef614
commit 6f1ed94e82
3 changed files with 25 additions and 17 deletions
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12
cranelift/codegen/meta/src/shared/instructions.rs
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@@ -1537,7 +1537,9 @@ pub(crate) fn define(
Extract lane ``Idx`` from ``x``.
The lane index, ``Idx``, is an immediate value, not an SSA value. It
must indicate a valid lane index for the type of ``x``.
must indicate a valid lane index for the type of ``x``. Note that the upper bits of ``a``
may or may not be zeroed depending on the ISA but the type system should prevent using
``a`` as anything other than the extracted value.
"#,
)
.operands_in(vec![x, Idx])
@@ -2782,9 +2784,11 @@ pub(crate) fn define(
Inst::new(
"scalar_to_vector",
r#"
Scalar To Vector -- move a value out of a scalar register and into a vector
register; the scalar will be moved to the lowest-order bits of the vector
register and any higher bits will be zeroed.
Scalar To Vector -- move a value out of a scalar register and into a vector register; the
scalar will be moved to the lowest-order bits of the vector register. Note that this
instruction is intended as a low-level legalization instruction and frontends should prefer
insertlane; on certain architectures, scalar_to_vector may zero the highest-order bits for some
types (e.g. integers) but not for others (e.g. floats).
"#,
)
.operands_in(vec![s])