| Message ID | 20241025141254.2141506-7-peter.maydell@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | softfloat: Set 2-NaN propagation rule in float_status, not at compile time | expand |
On 10/25/24 15:12, Peter Maydell wrote: > Set the 2-NaN propagation rule explicitly in env->fp_status. > > Really we only need to do this at CPU reset (after reset has zeroed > out most of the CPU state struct, which typically includes fp_status > fields). However target/hppa does not currently implement CPU reset > at all, so leave a TODO comment to note that this could be moved if > we ever do implement reset. > > Signed-off-by: Peter Maydell<peter.maydell@linaro.org> > --- > target/hppa/fpu_helper.c | 6 ++++++ > fpu/softfloat-specialize.c.inc | 4 ++-- > 2 files changed, 8 insertions(+), 2 deletions(-) We could do this in hppa_cpu_init(). Anyway, Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~
diff --git a/target/hppa/fpu_helper.c b/target/hppa/fpu_helper.c index deaed2b65d1..0e44074ba82 100644 --- a/target/hppa/fpu_helper.c +++ b/target/hppa/fpu_helper.c @@ -49,6 +49,12 @@ void HELPER(loaded_fr0)(CPUHPPAState *env) d = FIELD_EX32(shadow, FPSR, D); set_flush_to_zero(d, &env->fp_status); set_flush_inputs_to_zero(d, &env->fp_status); + + /* + * TODO: we only need to do this at CPU reset, but currently + * HPPA does note implement a CPU reset method at all... + */ + set_float_2nan_prop_rule(float_2nan_prop_s_ab, &env->fp_status); } void cpu_hppa_loaded_fr0(CPUHPPAState *env) diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc index bbc3b70fa9d..4e51cf8d083 100644 --- a/fpu/softfloat-specialize.c.inc +++ b/fpu/softfloat-specialize.c.inc @@ -403,9 +403,9 @@ static int pickNaN(FloatClass a_cls, FloatClass b_cls, #if defined(TARGET_AVR) || defined(TARGET_HEXAGON) \ || defined(TARGET_RISCV) || defined(TARGET_SH4) \ || defined(TARGET_TRICORE) || defined(TARGET_ARM) || defined(TARGET_MIPS) \ - || defined(TARGET_LOONGARCH64) + || defined(TARGET_LOONGARCH64) || defined(TARGET_HPPA) g_assert_not_reached(); -#elif defined(TARGET_HPPA) || defined(TARGET_S390X) +#elif defined(TARGET_S390X) rule = float_2nan_prop_s_ab; #elif defined(TARGET_PPC) || defined(TARGET_M68K) /*
Set the 2-NaN propagation rule explicitly in env->fp_status. Really we only need to do this at CPU reset (after reset has zeroed out most of the CPU state struct, which typically includes fp_status fields). However target/hppa does not currently implement CPU reset at all, so leave a TODO comment to note that this could be moved if we ever do implement reset. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> --- target/hppa/fpu_helper.c | 6 ++++++ fpu/softfloat-specialize.c.inc | 4 ++-- 2 files changed, 8 insertions(+), 2 deletions(-)