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Add comment regarding bit order

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Caleb Zulawski 2021-11-10 01:54:28 +00:00
parent 1e1886908f
commit fe8ae57645
1 changed files with 3 additions and 0 deletions
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3
compiler/rustc_codegen_llvm/src/intrinsic.rs
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@ -1072,6 +1072,9 @@ fn generic_simd_intrinsic(
// * an unsigned integer
// * an array of `u8`
// If the vector has less than 8 lanes, a u8 is returned with zeroed trailing bits.
//
// The bit order of the result depends on the byte endianness, LSB-first for little
// endian and MSB-first for big endian.
let expected_int_bits = in_len.max(8);
let expected_bytes = expected_int_bits / 8 + ((expected_int_bits % 8 > 0) as u64);