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SIMD groundwork#1199

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nikomatsakis merged 25 commits intorust-lang:masterrust-lang/rfcs:masterfrom huonw:simdhuonw/rfcs:simdCopy head branch name to clipboardSep 18, 2015

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Commits on Jul 7, 2015

• Lay groundwork for SIMD.

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Commits on Jul 8, 2015

• First round of changes: remove extraneous traits etc.

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• Second round of changes: minor tweaks.

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Commits on Jul 9, 2015

• Clarify/fix typos.

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• Note that fixed-length arrays could be repr(simd)'d.

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Commits on Jul 10, 2015

• Remove the simd_primitive_trait attribute.

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• Mention alignment changes due to repr(simd).

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• Note pre-RFC discussion.

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Commits on Jul 13, 2015

• Clarify how the intrinsics' structural typing works.

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• Add arithmetic intrinsics alternative.

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• Write down an answer to "why not asm!?".

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Commits on Jul 14, 2015

• point to cfg-if.

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Commits on Aug 3, 2015

• Use intrinsics for arithmetic instead of built-in operators.

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• Accidentally:

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Commits on Aug 6, 2015

• Use the platform-intrinsic ABI instead of rust-intrinsic.

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• feature(simd_basics) -> feature(repr_simd)

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Commits on Aug 12, 2015

• Remove struct flattening.

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• Change shuffles to use arrays of indices.

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• shuffles don't rely on generic types for return values.

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• Intrinsics-for-operations is now the RFC, not an alternative.

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• Out of bounds indices are errors (backwards compat to relax).

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• Only invalid to *call* intrinsics on bad platforms.

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• There can be more shuffles.

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Commits on Aug 14, 2015

• Internal references are legal.

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• Type-level integer/values alternatives for shuffles.

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