From 1bb5257def132090bdff2cd1352841915553aaaf Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Tue, 5 Nov 2024 10:09:54 +0000 Subject: [PATCH] target/loongarch: Explicitly set 2-NaN propagation rule Set the 2-NaN propagation rule explicitly in the float_status word we use. (There are a couple of places in fpu_helper.c where we create a dummy float_status word with "float_status *s = { };", but these are only used for calling float*_is_quiet_nan() so it doesn't matter that we don't set a 2-NaN propagation rule there.) Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson Message-id: 20241025141254.2141506-6-peter.maydell@linaro.org --- fpu/softfloat-specialize.c.inc | 6 +++--- target/loongarch/tcg/fpu_helper.c | 1 + 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc index c60b999aa3..bbc3b70fa9 100644 --- a/fpu/softfloat-specialize.c.inc +++ b/fpu/softfloat-specialize.c.inc @@ -402,10 +402,10 @@ static int pickNaN(FloatClass a_cls, FloatClass b_cls, /* target didn't set the rule: fall back to old ifdef choices */ #if defined(TARGET_AVR) || defined(TARGET_HEXAGON) \ || defined(TARGET_RISCV) || defined(TARGET_SH4) \ - || defined(TARGET_TRICORE) || defined(TARGET_ARM) || defined(TARGET_MIPS) + || defined(TARGET_TRICORE) || defined(TARGET_ARM) || defined(TARGET_MIPS) \ + || defined(TARGET_LOONGARCH64) g_assert_not_reached(); -#elif defined(TARGET_HPPA) || \ - defined(TARGET_LOONGARCH64) || defined(TARGET_S390X) +#elif defined(TARGET_HPPA) || defined(TARGET_S390X) rule = float_2nan_prop_s_ab; #elif defined(TARGET_PPC) || defined(TARGET_M68K) /* diff --git a/target/loongarch/tcg/fpu_helper.c b/target/loongarch/tcg/fpu_helper.c index f6753c5875..21bc3b04a9 100644 --- a/target/loongarch/tcg/fpu_helper.c +++ b/target/loongarch/tcg/fpu_helper.c @@ -31,6 +31,7 @@ void restore_fp_status(CPULoongArchState *env) set_float_rounding_mode(ieee_rm[(env->fcsr0 >> FCSR0_RM) & 0x3], &env->fp_status); set_flush_to_zero(0, &env->fp_status); + set_float_2nan_prop_rule(float_2nan_prop_s_ab, &env->fp_status); } int ieee_ex_to_loongarch(int xcpt)