target/sh4: Set default NaN pattern explicitly

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

diff --git a/target/sh4/cpu.c b/target/sh4/cpu.c
index 8f07261dcfd59b6253f83c8ecd37d2012ef75dc3..d5008859b8e654da4b83f707122a410b0d238baf 100644 (file)
--- 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)