Set the default NaN pattern explicitly for sh4. Note that sh4
is one of the only three targets (the others being HPPA and
sometimes MIPS) that has snan_bit_is_one set.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241202131347.498124-47-peter.maydell@linaro.org
---
 target/sh4/cpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/sh4/cpu.c b/target/sh4/cpu.c
index 8f07261dcfd..d5008859b8e 100644
--- a/target/sh4/cpu.c
+++ b/target/sh4/cpu.c
@@ -127,6 +127,8 @@ static void superh_cpu_reset_hold(Object *obj, ResetType type)
     set_flush_to_zero(1, &env->fp_status);
 #endif
     set_default_nan_mode(1, &env->fp_status);
+    /* sign bit clear, set all frac bits other than msb */
+    set_float_default_nan_pattern(0b00111111, &env->fp_status);
 }
 
 static void superh_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
-- 
2.34.1