VCE_STATUS
WREG32_FIELD(VCE_STATUS, JOB_BUSY, 1);
WREG32_FIELD(VCE_STATUS, JOB_BUSY, 0);
WREG32_P(VCE_STATUS, 1, ~1);
status = RREG32(VCE_STATUS);
WREG32_P(VCE_STATUS, 0, ~1);