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-id = 1779
-title = "PowerPC AltiVec source vector subnormal values are not flushed to zero"
-state = "closed"
-created_at = "2023-07-22T21:17:19.526Z"
-closed_at = "2023-09-07T15:43:08.538Z"
-labels = ["Closed::Fixed", "target: ppc"]
-url = "https://gitlab.com/qemu-project/qemu/-/issues/1779"
-host-os = "Ubuntu 20.04"
-host-arch = "x86-64"
-qemu-version = "7.0.0"
-guest-os = "Ubuntu"
-guest-arch = "PowerPC"
-description = """AltiVec specifies that source and result vectors are flushed to zero (in NJ mode).  Only result vectors are flushed to zero."""
-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 = """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());
-}
-```"""