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Tracking issue for RFC 2574, "SIMD vectors in FFI" #63068
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A-FFIArea: Foreign function interface (FFI)Area: Foreign function interface (FFI)A-SIMDArea: SIMD (Single Instruction Multiple Data)Area: SIMD (Single Instruction Multiple Data)B-RFC-approvedBlocker: Approved by a merged RFC but not yet implemented.Blocker: Approved by a merged RFC but not yet implemented.C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFCF-simd_ffi`#![feature(simd_ffi)]``#![feature(simd_ffi)]`S-tracking-unimplementedStatus: The feature has not been implemented.Status: The feature has not been implemented.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.T-langRelevant to the language teamRelevant to the language teamrequires-nightlyThis issue requires a nightly compiler in some way. When possible, use a F-* label instead.This issue requires a nightly compiler in some way. When possible, use a F-* label instead.
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A-FFIArea: Foreign function interface (FFI)Area: Foreign function interface (FFI)A-SIMDArea: SIMD (Single Instruction Multiple Data)Area: SIMD (Single Instruction Multiple Data)B-RFC-approvedBlocker: Approved by a merged RFC but not yet implemented.Blocker: Approved by a merged RFC but not yet implemented.C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFCF-simd_ffi`#![feature(simd_ffi)]``#![feature(simd_ffi)]`S-tracking-unimplementedStatus: The feature has not been implemented.Status: The feature has not been implemented.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.T-langRelevant to the language teamRelevant to the language teamrequires-nightlyThis issue requires a nightly compiler in some way. When possible, use a F-* label instead.This issue requires a nightly compiler in some way. When possible, use a F-* label instead.
This is a tracking issue for the RFC "SIMD vectors in FFI" (rust-lang/rfcs#2574).
The feature gate is
#![feature(simd_ffi)].Steps:
Unresolved questions:
__m128on C FFI when theavxfeature is enabled? Does that change the calling convention and make doing so unsafe ? We could extend this RFC to also require that to use certain types certain features must be disabled.simd/vector_types.hthat use__attribute__((__ext_vector_type__(...))), we should make sure that we're ABI-compatible with those. See also their docs.