diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2018-08-16 14:05:29 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-08-16 14:29:58 +0100 |
| commit | 19062c169e5bcdda3d60df9161228e107bf0f96e (patch) | |
| tree | 29f29ead619f3c62856f17a29aed82ca983fa818 | |
| parent | 0b62159be33d45d00dfa34a317c6d3da30ffb480 (diff) | |
target/arm: Ignore float_flag_input_denormal from fp_status_f16
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-stable@nongnu.org (3.0.1)
Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Message-id: 20180810193129.1556-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | target/arm/helper.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c index 0fc6d2e213..a3124082a6 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -11312,9 +11312,13 @@ 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; } |