When FZ is set, input_denormal exceptions are recognized, but this does
not happen with FZ16. The softfloat code has no way to distinguish
these bits and will raise such exceptions into fp_status_f16.flags,
so ignore them when computing the accumulated flags.
Cc: qemu-sta...@nongnu.org (3.0.1)
Reported-by: Laurent Desnogues <laurent.desnog...@gmail.com>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
target/arm/helper.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 452d5e182a..61454a77ec 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11314,9 +11314,13 @@ uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env)
fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
| (env->vfp.vec_len << 16)
| (env->vfp.vec_stride << 20);
+
i = get_float_exception_flags(&env->vfp.fp_status);
i |= get_float_exception_flags(&env->vfp.standard_fp_status);
- i |= get_float_exception_flags(&env->vfp.fp_status_f16);
+ /* FZ16 does not generate an input denormal exception. */
+ i |= (get_float_exception_flags(&env->vfp.fp_status_f16)
+ & ~float_flag_input_denormal);
+
fpscr |= vfp_exceptbits_from_host(i);
return fpscr;
}
--
2.17.1
