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Diffstat (limited to 'results/classifier/108/other/1779')
| -rw-r--r-- | results/classifier/108/other/1779 | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/results/classifier/108/other/1779 b/results/classifier/108/other/1779 new file mode 100644 index 000000000..79764be7c --- /dev/null +++ b/results/classifier/108/other/1779 @@ -0,0 +1,45 @@ +graphic: 0.844 +device: 0.803 +performance: 0.747 +semantic: 0.647 +vnc: 0.578 +PID: 0.575 +permissions: 0.423 +boot: 0.365 +debug: 0.348 +other: 0.235 +network: 0.172 +socket: 0.138 +files: 0.101 +KVM: 0.019 + +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()); +} +``` |