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Re: [PATCH v2 for-10.0 41/54] target/loongarch: Set default NaN pattern


From: Richard Henderson
Subject: Re: [PATCH v2 for-10.0 41/54] target/loongarch: Set default NaN pattern explicitly
Date: Mon, 2 Dec 2024 11:29:38 -0600
User-agent: Mozilla Thunderbird

On 12/2/24 07:13, Peter Maydell wrote:
Set the default NaN pattern explicitly for loongarch.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
  target/loongarch/tcg/fpu_helper.c | 2 ++
  1 file changed, 2 insertions(+)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~

diff --git a/target/loongarch/tcg/fpu_helper.c 
b/target/loongarch/tcg/fpu_helper.c
index aea5e0fe5e6..a83acf64b08 100644
--- a/target/loongarch/tcg/fpu_helper.c
+++ b/target/loongarch/tcg/fpu_helper.c
@@ -38,6 +38,8 @@ void restore_fp_status(CPULoongArchState *env)
       */
      set_float_infzeronan_rule(float_infzeronan_dnan_never, &env->fp_status);
      set_float_3nan_prop_rule(float_3nan_prop_s_cab, &env->fp_status);
+    /* Default NaN: sign bit clear, msb frac bit set */
+    set_float_default_nan_pattern(0b01000000, &env->fp_status);
  }
int ieee_ex_to_loongarch(int xcpt)



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