diff --git a/hw/hppa/dino.c b/hw/hppa/dino.c
index 81053b5fb6..5b82c9440d 100644
--- a/hw/hppa/dino.c
+++ b/hw/hppa/dino.c
@@ -496,7 +496,7 @@ static void dino_set_irq(void *opaque, int irq, int level)
 
 static int dino_pci_map_irq(PCIDevice *d, int irq_num)
 {
-    int slot = d->devfn >> 3;
+    int slot = PCI_SLOT(d->devfn);
 
     assert(irq_num >= 0 && irq_num <= 3);
 
diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
index 096c46fef1..68821d90f5 100644
--- a/hw/i386/xen/xen-hvm.c
+++ b/hw/i386/xen/xen-hvm.c
@@ -140,7 +140,7 @@ typedef struct XenIOState {
 
 int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
 {
-    return irq_num + ((pci_dev->devfn >> 3) << 2);
+    return irq_num + (PCI_SLOT(pci_dev->devfn) << 2);
 }
 
 void xen_piix3_set_irq(void *opaque, int irq_num, int level)
diff --git a/hw/isa/piix3.c b/hw/isa/piix3.c
index 587850b888..f46ccae25c 100644
--- a/hw/isa/piix3.c
+++ b/hw/isa/piix3.c
@@ -361,7 +361,7 @@ type_init(piix3_register_types)
 static int pci_slot_get_pirq(PCIDevice *pci_dev, int pci_intx)
 {
     int slot_addend;
-    slot_addend = (pci_dev->devfn >> 3) - 1;
+    slot_addend = PCI_SLOT(pci_dev->devfn) - 1;
     return (pci_intx + slot_addend) & 3;
 }
 
diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index e091bc4ed5..588e6f9930 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -982,7 +982,7 @@ static int gt64120_pci_map_irq(PCIDevice *pci_dev, int irq_num)
 {
     int slot;
 
-    slot = (pci_dev->devfn >> 3);
+    slot = PCI_SLOT(pci_dev->devfn);
 
     switch (slot) {
     /* PIIX4 USB */
diff --git a/hw/pci-host/bonito.c b/hw/pci-host/bonito.c
index b05295639a..ee8b193e15 100644
--- a/hw/pci-host/bonito.c
+++ b/hw/pci-host/bonito.c
@@ -570,7 +570,7 @@ static int pci_bonito_map_irq(PCIDevice *pci_dev, int irq_num)
 {
     int slot;
 
-    slot = (pci_dev->devfn >> 3);
+    slot = PCI_SLOT(pci_dev->devfn);
 
     switch (slot) {
     case 5:   /* FULOONG2E_VIA_SLOT, SouthBridge, IDE, USB, ACPI, AC97, MC97 */
diff --git a/hw/pci-host/ppce500.c b/hw/pci-host/ppce500.c
index 9517aab913..5ad1424b31 100644
--- a/hw/pci-host/ppce500.c
+++ b/hw/pci-host/ppce500.c
@@ -342,7 +342,7 @@ static const MemoryRegionOps e500_pci_reg_ops = {
 
 static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int pin)
 {
-    int devno = pci_dev->devfn >> 3;
+    int devno = PCI_SLOT(pci_dev->devfn);
     int ret;
 
     ret = ppce500_pci_map_irq_slot(devno, pin);
diff --git a/hw/ppc/ppc4xx_pci.c b/hw/ppc/ppc4xx_pci.c
index 28724c06f8..e8789f64e8 100644
--- a/hw/ppc/ppc4xx_pci.c
+++ b/hw/ppc/ppc4xx_pci.c
@@ -243,7 +243,7 @@ static void ppc4xx_pci_reset(void *opaque)
  * may need further refactoring for other boards. */
 static int ppc4xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
 {
-    int slot = pci_dev->devfn >> 3;
+    int slot = PCI_SLOT(pci_dev->devfn);
 
     trace_ppc4xx_pci_map_irq(pci_dev->devfn, irq_num, slot);
 
diff --git a/hw/sh4/sh_pci.c b/hw/sh4/sh_pci.c
index 73d2d0bccb..734892f47c 100644
--- a/hw/sh4/sh_pci.c
+++ b/hw/sh4/sh_pci.c
@@ -109,7 +109,7 @@ static const MemoryRegionOps sh_pci_reg_ops = {
 
 static int sh_pci_map_irq(PCIDevice *d, int irq_num)
 {
-    return (d->devfn >> 3);
+    return PCI_SLOT(d->devfn);
 }
 
 static void sh_pci_set_irq(void *opaque, int irq_num, int level)