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Fix off-by-one error uncovered by std::simd tests

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This commit is contained in:
Caleb Zulawski 2021-09-13 00:45:18 +00:00
parent 3981ca076c
commit 569c51d30d
1 changed files with 2 additions and 2 deletions
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4
compiler/rustc_codegen_llvm/src/intrinsic.rs
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@ -861,7 +861,7 @@ fn generic_simd_intrinsic(
let (len, _) = arg_tys[1].simd_size_and_type(bx.tcx());
let expected_int_bits = (len.max(8) - 1).next_power_of_two();
let expected_bytes = len / 8 + ((len % 8 > 1) as u64);
let expected_bytes = len / 8 + ((len % 8 > 0) as u64);
let mask_ty = arg_tys[0];
let mask = match mask_ty.kind() {
@ -1073,7 +1073,7 @@ fn generic_simd_intrinsic(
// * an array of `u8`
// If the vector has less than 8 lanes, a u8 is returned with zeroed trailing bits.
let expected_int_bits = in_len.max(8);
let expected_bytes = expected_int_bits / 8 + ((expected_int_bits % 8 > 1) as u64);
let expected_bytes = expected_int_bits / 8 + ((expected_int_bits % 8 > 0) as u64);
// Integer vector <i{in_bitwidth} x in_len>:
let (i_xn, in_elem_bitwidth) = match in_elem.kind() {