diff options
Diffstat (limited to 'results/classifier/zero-shot-user-mode/output/instruction/1779')
| -rw-r--r-- | results/classifier/zero-shot-user-mode/output/instruction/1779 | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/results/classifier/zero-shot-user-mode/output/instruction/1779 b/results/classifier/zero-shot-user-mode/output/instruction/1779 new file mode 100644 index 00000000..9162a7df --- /dev/null +++ b/results/classifier/zero-shot-user-mode/output/instruction/1779 @@ -0,0 +1,36 @@ +instruction: 0.581 +runtime: 0.255 +syscall: 0.164 + + + +PowerPC AltiVec source vector subnormal values are not flushed to zero +Description of problem: +AltiVec specifies that source and result vectors are flushed to zero (in NJ mode). Only result vectors are flushed to zero. +Steps to reproduce: +1. Compile the attached Rust program (e.g. `cargo +nightly build --target powerpc-unknown-linux-gnu`) +2. Run the program and expect assertions to pass. +3. See assertions fail. +Additional information: +See the offending Rust program: + +``` +#![feature(stdsimd, powerpc_target_feature)] + +use std::arch::powerpc::*; + +#[target_feature(enable = "altivec")] +unsafe fn add(x: f32, y: f32) -> f32 { + let array: [f32; 4] = unsafe { std::mem::transmute(vec_add(vec_splats(x), vec_splats(y))) }; + array[0] +} + +pub fn main() { + let result = unsafe { add(-1.0857398e-38, 0.) }; + assert_eq!(result, 0.); + + // if the input is flushed, the result will be +0 + // if only the output is flushed, the result is -0 + assert!(result.is_sign_positive()); +} +``` |