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| author | Caleb Zulawski <caleb.zulawski@gmail.com> | 2021-11-10 01:54:28 +0000 |
|---|---|---|
| committer | Caleb Zulawski <caleb.zulawski@gmail.com> | 2021-11-10 01:54:28 +0000 |
| commit | fe8ae57645f1cd8d99709d7197d1eab55d2e4270 (patch) | |
| tree | 3c36acdea879792b5223a3e25e854e97cd7085dd | |
| parent | 1e1886908fb37dcbfb8473e00e694ef672f97088 (diff) | |
| download | rust-fe8ae57645f1cd8d99709d7197d1eab55d2e4270.tar.gz rust-fe8ae57645f1cd8d99709d7197d1eab55d2e4270.zip | |
Add comment regarding bit order
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/intrinsic.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/intrinsic.rs b/compiler/rustc_codegen_llvm/src/intrinsic.rs index 99de11bc2c4..924bb803b36 100644 --- a/compiler/rustc_codegen_llvm/src/intrinsic.rs +++ b/compiler/rustc_codegen_llvm/src/intrinsic.rs @@ -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); |