// from GXInit

BOOL IsWriteGatherBufferEmpty(void)
{
    return WPAR[BNE];
}

void EnableWriteGatherPipe(void)
{
    u32 hid2 = PPCMfhid2();
    PPCMtwpar(0x0C080000);
    PPCMthid2(hid2 | HID2_WPE);
}

void DisableWriteGatherPipe(void)
{
    u32 hid2 = PPCMfhid2();
    PPCMthid2(hid2 & ~HID2_WPE);
}