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Convert (ffs(val) - 1) to ctz32(val)

Browse source 
This commit was generated mechanically by coccinelle from the following
semantic patch:

@@
expression val;
@@
- (ffs(val) - 1)
+ ctz32(val)

The call sites have been audited to ensure the ffs(0) - 1 == -1 case
never occurs (due to input validation, asserts, etc).  Therefore we
don't need to worry about the fact that ctz32(0) == 32.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1427124571-28598-5-git-send-email-stefanha@redhat.com
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2015-03-23 15:29:26 +00:00 • committed by Kevin Wolf
parent 5863d374a3
commit 786a4ea82e
22 changed files with 50 additions and 50 deletions
Download patch file Download diff file Expand all files Collapse all files

16
include/hw/pci/pci.h
View file

@ -568,7 +568,7 @@ static inline void
pci_set_byte_by_mask(uint8_t *config, uint8_t mask, uint8_t reg)
{
uint8_t val = pci_get_byte(config);
uint8_t rval = reg << (ffs(mask) - 1);
uint8_t rval = reg << ctz32(mask);
pci_set_byte(config, (~mask & val) | (mask & rval));
}
@ -576,14 +576,14 @@ static inline uint8_t
pci_get_byte_by_mask(uint8_t *config, uint8_t mask)
{
uint8_t val = pci_get_byte(config);
return (val & mask) >> (ffs(mask) - 1);
return (val & mask) >> ctz32(mask);
}
static inline void
pci_set_word_by_mask(uint8_t *config, uint16_t mask, uint16_t reg)
{
uint16_t val = pci_get_word(config);
uint16_t rval = reg << (ffs(mask) - 1);
uint16_t rval = reg << ctz32(mask);
pci_set_word(config, (~mask & val) | (mask & rval));
}
@ -591,14 +591,14 @@ static inline uint16_t
pci_get_word_by_mask(uint8_t *config, uint16_t mask)
{
uint16_t val = pci_get_word(config);
return (val & mask) >> (ffs(mask) - 1);
return (val & mask) >> ctz32(mask);
}
static inline void
pci_set_long_by_mask(uint8_t *config, uint32_t mask, uint32_t reg)
{
uint32_t val = pci_get_long(config);
uint32_t rval = reg << (ffs(mask) - 1);
uint32_t rval = reg << ctz32(mask);
pci_set_long(config, (~mask & val) | (mask & rval));
}
@ -606,14 +606,14 @@ static inline uint32_t
pci_get_long_by_mask(uint8_t *config, uint32_t mask)
{
uint32_t val = pci_get_long(config);
return (val & mask) >> (ffs(mask) - 1);
return (val & mask) >> ctz32(mask);
}
static inline void
pci_set_quad_by_mask(uint8_t *config, uint64_t mask, uint64_t reg)
{
uint64_t val = pci_get_quad(config);
uint64_t rval = reg << (ffs(mask) - 1);
uint64_t rval = reg << ctz32(mask);
pci_set_quad(config, (~mask & val) | (mask & rval));
}
@ -621,7 +621,7 @@ static inline uint64_t
pci_get_quad_by_mask(uint8_t *config, uint64_t mask)
{
uint64_t val = pci_get_quad(config);
return (val & mask) >> (ffs(mask) - 1);
return (val & mask) >> ctz32(mask);
}
PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction,