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Diffstat (limited to 'gitlab/issues/target_sh4/host_missing/accel_missing/2318.toml')
| -rw-r--r-- | gitlab/issues/target_sh4/host_missing/accel_missing/2318.toml | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/gitlab/issues/target_sh4/host_missing/accel_missing/2318.toml b/gitlab/issues/target_sh4/host_missing/accel_missing/2318.toml deleted file mode 100644 index 8cfd8e0f2..000000000 --- a/gitlab/issues/target_sh4/host_missing/accel_missing/2318.toml +++ /dev/null @@ -1,42 +0,0 @@ -id = 2318 -title = "SH4: SUBV instruction not emulated properly" -state = "closed" -created_at = "2024-04-29T17:36:33.900Z" -closed_at = "2024-05-04T02:01:16.498Z" -labels = ["target: sh4", "workflow::Patch available"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/2318" -host-os = "Debian testing" -host-arch = "x86_64" -qemu-version = "qemu-sh4 version 8.2.1 (Debian 1:8.2.1+ds-2)" -guest-os = "Buildroot uClibc (qemu-user)" -guest-arch = "SH4" -description = """SUBV opcode is emulated incorrectly. - -The documentation says: - -`SUBV Rm, Rn Rn - Rm -> Rn, underflow -> T` - -Qemu seems to perform the subtraction correctly, but will not detect an underflow.""" -reproduce = """```c -#include <stdio.h> - -int main(void) -{ -\tregister unsigned int a asm("r8") = 0x80000001; -\tregister unsigned int b asm("r9") = 0x2; -\tregister unsigned int c asm("r10"); - -\tasm volatile("subv %2,%0\\n" -\t\t "movt %1\\n" -\t\t : "+r"(a), "=r"(c) : "r"(b) :); - -\tprintf("Values: a=0x%x b=0x%x c=0x%x\\n", a, b, c); - -\treturn 0; -} -```""" -additional = """Tested on real hardware (SEGA Dreamcast, GCC 15.0), the program above prints: -`Values: a=0x7fffffff b=0x2 c=0x1` - -Running with Qemu (and GCC 13.0), the same program prints: -`Values: a=0x7fffffff b=0x2 c=0x0`""" |