From: Daniil Kovalev <dkova...@compiler-toolchain-for.me>
If a program requires fr1, we should set the FR bit of CP0 control status
register and add F64 hardware flag. The corresponding `else if` branch
statement is copied from the linux kernel sources (see `arch_check_elf` function
in linux/arch/mips/kernel/elf.c).
Signed-off-by: Daniil Kovalev <dkova...@compiler-toolchain-for.me>
Reviewed-by: Jiaxun Yang <jiaxun.y...@flygoat.com>
Message-Id: <20230404052153.16617-1-dkova...@compiler-toolchain-for.me>
Signed-off-by: Laurent Vivier <laur...@vivier.eu>
---
linux-user/mips/cpu_loop.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/linux-user/mips/cpu_loop.c b/linux-user/mips/cpu_loop.c
index d5c1c7941d34..8735e58bada0 100644
--- a/linux-user/mips/cpu_loop.c
+++ b/linux-user/mips/cpu_loop.c
@@ -290,7 +290,10 @@ void target_cpu_copy_regs(CPUArchState *env, struct
target_pt_regs *regs)
env->CP0_Status |= (1 << CP0St_FR);
env->hflags |= MIPS_HFLAG_F64;
}
- } else if (!prog_req.fre && !prog_req.frdefault &&
+ } else if (prog_req.fr1) {
+ env->CP0_Status |= (1 << CP0St_FR);
+ env->hflags |= MIPS_HFLAG_F64;
+ } else if (!prog_req.fre && !prog_req.frdefault &&
!prog_req.fr1 && !prog_req.single && !prog_req.soft) {
fprintf(stderr, "qemu: Can't find a matching FPU mode\n");
exit(1);
--
2.40.1
