From: Peter Maydell Date: Tue, 15 May 2018 13:58:42 +0000 (+0100) Subject: target/arm: Fix fp_status_f16 tininess before rounding X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=bcc531f0364796104df4443d17f99b5fb494eca2;p=qemu.git target/arm: Fix fp_status_f16 tininess before rounding In commit d81ce0ef2c4f105 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: d81ce0ef2c4f105 Cc: qemu-stable@nongnu.org Reviewed-by: Richard Henderson Reviewed-by: Alex Bennée Signed-off-by: Peter Maydell Message-id: 20180512004311.9299-16-richard.henderson@linaro.org --- diff --git a/target/arm/cpu.c b/target/arm/cpu.c index d175c5e94f..7939c6b8ae 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -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);