From: Peter Maydell <peter.maydell@linaro.org>
Date: Tue, 5 Nov 2024 10:09:57 +0000 (+0000)
Subject: target/openrisc: Explicitly set 2-NaN propagation rule
X-Git-Tag: v9.2.0-rc0~15^2~12
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=355e6cfb94f61214ad4f633ce568debec5a8fc0d;p=thirdparty%2Fqemu.git

target/openrisc: Explicitly set 2-NaN propagation rule

Set the NaN propagation rule explicitly for the float_status word
used in the openrisc target.

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: 20241025141254.2141506-20-peter.maydell@linaro.org
---

diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc
index 40cbb1ab73b..ee5c73cad46 100644
--- a/fpu/softfloat-specialize.c.inc
+++ b/fpu/softfloat-specialize.c.inc
@@ -407,7 +407,7 @@ static int pickNaN(FloatClass a_cls, FloatClass b_cls,
     || defined(TARGET_S390X) || defined(TARGET_PPC) || defined(TARGET_M68K) \
     || defined(TARGET_SPARC) || defined(TARGET_XTENSA) \
     || defined(TARGET_I386) || defined(TARGET_ALPHA) \
-    || defined(TARGET_MICROBLAZE)
+    || defined(TARGET_MICROBLAZE) || defined(TARGET_OPENRISC)
         g_assert_not_reached();
 #else
         rule = float_2nan_prop_x87;
diff --git a/target/openrisc/cpu.c b/target/openrisc/cpu.c
index 6ec54ad7a6c..b96561d1f26 100644
--- a/target/openrisc/cpu.c
+++ b/target/openrisc/cpu.c
@@ -105,6 +105,12 @@ static void openrisc_cpu_reset_hold(Object *obj, ResetType type)
 
     set_float_detect_tininess(float_tininess_before_rounding,
                               &cpu->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, &cpu->env.fp_status);
+
 
 #ifndef CONFIG_USER_ONLY
     cpu->env.picmr = 0x00000000;