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+id = 1547
+title = "POWER9 emulation is broken when compiler optimizations are on (for gcc 11.3 and later)"
+state = "closed"
+created_at = "2023-03-16T12:21:17.222Z"
+closed_at = "2023-03-23T10:21:14.540Z"
+labels = ["linux-user", "target: ppc"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1547"
+host-os = "Ubuntu MATE 22.04.2 LTS"
+host-arch = "x86_64"
+qemu-version = "any prior to 7.x.y (tried 4.2.0, 5.1.0, 6.2.0)"
+guest-os = "n/a"
+guest-arch = "n/a"
+description = """Comparing two floating point memory operands produces incorrect result"""
+reproduce = """1. Unpack attached archive and change to test_p64 directory
+2. Build the source file with: powerpc64le-linux-gnu-g++ -O2 -static test.cpp -o test_p64
+3. Run with QEMU: qemu-ppc64le -cpu POWER9 test_p64 > output.txt
+4. Check the output text file output.txt (with pluma or any other text editor) to see the printouts"""
+additional = """The pre-built binary and its output file are attached as test_p64.tar.gz[test_p64.tar.gz](/uploads/0e9dbc22e6841496efc15775e6aa624a/test_p64.tar.gz)
+
+The purpose of this report is to motivate the creation of a point release QEMU 6.2.1 for Ubuntu 22.04 LTS (which will be supported for years to come). Also cross-linking similar bug report for MIPS with exact same goal: https://gitlab.com/qemu-project/qemu/-/issues/1531"""