target/i386: Set default NaN pattern explicitly
Set the default NaN pattern explicitly, and remove the ifdef from
parts64_default_nan().
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241202131347.498124-38-peter.maydell@linaro.org
diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc
index d77404f..452fe37 100644
--- a/fpu/softfloat-specialize.c.inc
+++ b/fpu/softfloat-specialize.c.inc
@@ -139,9 +139,6 @@
#if defined(TARGET_SPARC) || defined(TARGET_M68K)
/* Sign bit clear, all frac bits set */
dnan_pattern = 0b01111111;
-#elif defined(TARGET_I386) || defined(TARGET_X86_64)
- /* Sign bit set, most significant frac bit set */
- dnan_pattern = 0b11000000;
#elif defined(TARGET_HPPA)
/* Sign bit clear, msb-1 frac bit set */
dnan_pattern = 0b00100000;
diff --git a/target/i386/tcg/fpu_helper.c b/target/i386/tcg/fpu_helper.c
index 4303b33..d0a1e2f 100644
--- a/target/i386/tcg/fpu_helper.c
+++ b/target/i386/tcg/fpu_helper.c
@@ -181,6 +181,10 @@
*/
set_float_infzeronan_rule(float_infzeronan_dnan_never, &env->sse_status);
set_float_3nan_prop_rule(float_3nan_prop_abc, &env->sse_status);
+ /* Default NaN: sign bit set, most significant frac bit set */
+ set_float_default_nan_pattern(0b11000000, &env->fp_status);
+ set_float_default_nan_pattern(0b11000000, &env->mmx_status);
+ set_float_default_nan_pattern(0b11000000, &env->sse_status);
}
static inline uint8_t save_exception_flags(CPUX86State *env)
