Philippe Mathieu-Daudé 07d46408cb target/sh4: Fix SUBV opcode ... The documentation says: SUBV Rm, Rn Rn - Rm -> Rn, underflow -> T The overflow / underflow can be calculated as: T = ((Rn ^ Rm) & (Result ^ Rn)) >> 31 However we were using the incorrect: T = ((Rn ^ Rm) & (Result ^ Rm)) >> 31 Fix by using the Rn register instead of Rm. Add tests provided by Paul Cercueil. Cc: qemu-stable@nongnu.org Fixes: ad8d25a11f ("target-sh4: implement addv and subv using TCG") Reported-by: Paul Cercueil <paul@crapouillou.net> Suggested-by: Paul Cercueil <paul@crapouillou.net> Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2318 Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp> Message-Id: <20240430163125.77430-3-philmd@linaro.org> (cherry picked from commit e88a856efd) Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>		2024-05-04 09:37:20 +03:00
..
cpu-param.h	target/sh4: Remove NB_MMU_MODES define	2023-03-13 06:44:37 -07:00
cpu-qom.h	target: Move ArchCPUClass definition to 'cpu.h'	2023-11-07 13:08:48 +01:00
cpu.c	hw/cpu: Call object_class_is_abstract() once in cpu_class_by_name()	2023-11-07 13:08:48 +01:00
cpu.h	target/sh4: Merge mach and macl into a union	2024-04-10 20:32:12 +03:00
gdbstub.c	gdbstub: move register helpers into standalone include	2023-03-07 20:44:08 +00:00
helper.c	sh4: Coding style: Remove tabs	2023-12-04 15:12:57 +01:00
helper.h	target/sh4: Fix mac.w with saturation enabled	2024-04-10 20:32:12 +03:00
Kconfig	meson: Introduce target-specific Kconfig	2021-07-09 18:21:34 +02:00
meson.build	meson: Rename target_softmmu_arch -> target_system_arch	2023-10-07 19:03:07 +02:00
monitor.c	hmp: Pass monitor to mon_get_cpu_env()	2020-11-13 12:45:51 +00:00
op_helper.c	target/sh4: Fix mac.w with saturation enabled	2024-04-10 20:32:12 +03:00
translate.c	target/sh4: Fix SUBV opcode	2024-05-04 09:37:20 +03:00