Tracing gives me: IN: expm1f 0x800005cc: fetoxm1x %fp2,%fp0 Disassembler disagrees with translator over instruction decoding Please report this to qemu-devel@nongnu.org
(gdb) x/2hx 0x800005cc 0x800005cc: 0xf200 0x0808 The instruction is not implemented in qemu. I fix that. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1881450 Title: Emulation of a math function fails for m68k Linux user mode Status in QEMU: New Bug description: Please check the attached math-example.c file. When running the m68k executable under QEMU, it results in an "Illegal instruction" error. Other targets don't produce this error. Steps to reproduce the bug: 1. Download the math-example.c attached file. 2. Compile it by running: m68k-linux-gnu-gcc -O2 -static math-example.c -o math-example-m68k -lm 3. Run the executable with QEMU: /build/qemu-5.0.0/build-gcc/m68k-linux-user/qemu-m68k math-example-m68k The output of execution is: Profiling function expm1f(): qemu: uncaught target signal 4 (Illegal instruction) - core dumped Illegal instruction (core dumped) Output when running on other targets: Profiling function expm1f(): Elapsed time: 47 ms Control result: 71804.953125 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1881450/+subscriptions