target/microblaze: Explicitly set 2-NaN propagation rule
Set the NaN propagation rule explicitly for the float_status word
used in the microblaze target.
This is probably not the architecturally correct behaviour,
but since this is a no-behaviour-change patch, we leave a
TODO note to that effect.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241025141254.2141506-19-peter.maydell@linaro.org
diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc
index a5c3e2b..40cbb1a 100644
--- a/fpu/softfloat-specialize.c.inc
+++ b/fpu/softfloat-specialize.c.inc
@@ -406,7 +406,8 @@
|| defined(TARGET_LOONGARCH64) || defined(TARGET_HPPA) \
|| defined(TARGET_S390X) || defined(TARGET_PPC) || defined(TARGET_M68K) \
|| defined(TARGET_SPARC) || defined(TARGET_XTENSA) \
- || defined(TARGET_I386) || defined(TARGET_ALPHA)
+ || defined(TARGET_I386) || defined(TARGET_ALPHA) \
+ || defined(TARGET_MICROBLAZE)
g_assert_not_reached();
#else
rule = float_2nan_prop_x87;
diff --git a/target/microblaze/cpu.c b/target/microblaze/cpu.c
index 6329a77..14286de 100644
--- a/target/microblaze/cpu.c
+++ b/target/microblaze/cpu.c
@@ -202,6 +202,11 @@
env->pc = cpu->cfg.base_vectors;
set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
+ /*
+ * TODO: this is probably not the correct NaN propagation rule for
+ * this architecture.
+ */
+ set_float_2nan_prop_rule(float_2nan_prop_x87, &env->fp_status);
#if defined(CONFIG_USER_ONLY)
/* start in user mode with interrupts enabled. */
