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Diffstat (limited to 'gitlab/issues/target_ppc/host_missing/accel_TCG/852.toml')
| -rw-r--r-- | gitlab/issues/target_ppc/host_missing/accel_TCG/852.toml | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/gitlab/issues/target_ppc/host_missing/accel_TCG/852.toml b/gitlab/issues/target_ppc/host_missing/accel_TCG/852.toml deleted file mode 100644 index f4006223c..000000000 --- a/gitlab/issues/target_ppc/host_missing/accel_TCG/852.toml +++ /dev/null @@ -1,41 +0,0 @@ -id = 852 -title = "ppc64le: possible SIMD issue casting double to int" -state = "closed" -created_at = "2022-02-01T21:40:52.901Z" -closed_at = "2022-03-21T15:27:21.718Z" -labels = ["Closed::Fixed", "accel: TCG", "target: ppc"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/852" -host-os = "Debian 11 \"bullseye\"" -host-arch = "x86_64" -qemu-version = "6.1.0" -guest-os = "Debian unstable \"sid\"" -guest-arch = "ppc64le" -description = """Working with numpy in a ppc64le VM, I ran into a strange double -to casting issue, specifically when casting an array of 1.0 values to 1 values. The numpy folks guided me to a small reproducible test case. - -The attached [convert.c](/uploads/2dd7936f4defccf816ffee7c7c002e77/convert.c) creates double and int arrays of length `1 <= n <= 16`. The double array is filled with the value 1.0, and both arrays are passed to a function that converts the value. - -With `-O2`, output is as expected (truncated here): - -``` -i = 1: 1 -i = 2: 1 1 -i = 3: 1 1 1 -i = 4: 1 1 1 1 -i = 5: 1 1 1 1 1 -i = 6: 1 1 1 1 1 1 -``` - -With `-O3`, all values that fit into blocks of four become zero: -``` -i = 1: 1 -i = 2: 1 1 -i = 3: 1 1 1 -i = 4: 0 0 0 0 -i = 5: 0 0 0 0 1 -i = 6: 0 0 0 0 1 1 -``` - -I tested this with executables compiled on a physical ppc64le host, where the issue is not reproducible.""" -reproduce = """1. `gcc -O2 -o convert convert.c && ./convert` -2. `gcc -O3 -o convert convert.c && ./convert`""" -additional = "n/a" |