Add ARMv4 16-bit(set, mod, clr) operations used on DM320.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29221 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 4 insertions, 0 deletions

diff --git a/firmware/export/system.h b/firmware/export/system.h
index b246d154a4..65db721bb4 100644
--- a/firmware/export/system.h
+++ b/firmware/export/system.h
@@ -152,6 +152,10 @@ uint32_t isolate_first_bit(uint32_t val)
     { return val & -val; }
 
 /* Functions to set and clear register or variable bits atomically */
+void bitmod16(volatile uint16_t *addr, uint16_t bits, uint16_t mask);
+void bitset16(volatile uint16_t *addr, uint16_t mask);
+void bitclr16(volatile uint16_t *addr, uint16_t mask);
+
 void bitmod32(volatile uint32_t *addr, uint32_t bits, uint32_t mask);
 void bitset32(volatile uint32_t *addr, uint32_t mask);
 void bitclr32(volatile uint32_t *addr, uint32_t mask);