https://bugs.llvm.org/show_bug.cgi?id=49232
Bug ID: 49232
Summary: wasm_simd128.h intrinsics to initialize all lanes to
the same constant
Product: clang
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Headers
Assignee: tliv...@google.com
Reporter: mara...@gmail.com
CC: craig.top...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
wasm_simd128.h header provides
wasm_i8x16_const/wasm_i16x8_const/wasm_i32x4_const/wasm_i64x2_const/wasm_f32x4_const/wasm_f64x2_const
intrinsics to initialize v128_t vector to the specified constant literals. A
common use-case is to initialize all lanes to the same constant value, and it
doesn't work well with the existing intrinsics, as the value needs to be
replicated many time (16 times for wasm_i8x16_const). It is preferable to have
additional intrinsics (e.g. wasm_XXXX_const_splat(C)) to initialize all lanes
to the same value.
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