Commit bcc531f0 authored by Peter Maydell's avatar Peter Maydell
Browse files

target/arm: Fix fp_status_f16 tininess before rounding 



In commit d81ce0ef we added an extra float_status field
fp_status_fp16 for Arm, but forgot to initialize it correctly
by setting it to float_tininess_before_rounding. This currently
will only cause problems for the new V8_FP16 feature, since the
float-to-float conversion code doesn't use it yet. The effect
would be that we failed to set the Underflow IEEE exception flag
in all the cases where we should.

Add the missing initialization.

Fixes: d81ce0ef
Cc: qemu-stable@nongnu.org
Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Reviewed-by: default avatarAlex Bennée <alex.bennee@linaro.org>
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
Message-id: 20180512004311.9299-16-richard.henderson@linaro.org
parent 33358375

target/arm/cpu.c

+2 −0
Original line number Diff line number Diff line
@@ -324,6 +324,8 @@ static void arm_cpu_reset(CPUState *s) 
                              &env->vfp.fp_status);

    set_float_detect_tininess(float_tininess_before_rounding,

                              &env->vfp.standard_fp_status);

    set_float_detect_tininess(float_tininess_before_rounding,

                              &env->vfp.fp_status_f16);

#ifndef CONFIG_USER_ONLY

    if (kvm_enabled()) {

        kvm_arm_reset_vcpu(cpu);