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2007-12-11 Joel Sherrill <joel.sherrill@OARcorp.com>

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* rtems/score/cpu.h: Temporarily use C implementation of swap u32 for
	thumb mode.
This commit is contained in:
Joel Sherrill
2007-12-11 22:54:18 +00:00
parent 6710d81319
commit 1c62f16987
2 changed files with 25 additions and 9 deletions
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5
cpukit/score/cpu/arm/ChangeLog
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@@ -1,3 +1,8 @@
2007-12-11 Joel Sherrill <joel.sherrill@OARcorp.com>
* rtems/score/cpu.h: Temporarily use C implementation of swap u32 for
thumb mode.
2007-12-04 Joel Sherrill <joel.sherrill@OARcorp.com> 2007-12-04 Joel Sherrill <joel.sherrill@OARcorp.com>
* cpu.c, rtems/score/cpu.h: Move interrupt_stack_size field from CPU * cpu.c, rtems/score/cpu.h: Move interrupt_stack_size field from CPU

13
cpukit/score/cpu/arm/rtems/score/cpu.h
View File

@@ -805,6 +805,17 @@ static inline uint32_t CPU_swap_u32(
uint32_t value uint32_t value
) )
{ {
#if defined(__thumb__)
uint32_t byte1, byte2, byte3, byte4, swapped;
byte4 = (value >> 24) & 0xff;
byte3 = (value >> 16) & 0xff;
byte2 = (value >> 8) & 0xff;
byte1 = value & 0xff;
swapped = (byte1 << 24) | (byte2 << 16) | (byte3 << 8) | byte4;
return swapped;
#else
uint32_t tmp = value; /* make compiler warnings go away */ uint32_t tmp = value; /* make compiler warnings go away */
asm volatile ("EOR %1, %0, %0, ROR #16\n" asm volatile ("EOR %1, %0, %0, ROR #16\n"
"BIC %1, %1, #0xff0000\n" "BIC %1, %1, #0xff0000\n"
@@ -812,8 +823,8 @@ static inline uint32_t CPU_swap_u32(
"EOR %0, %0, %1, LSR #8\n" "EOR %0, %0, %1, LSR #8\n"
: "=r" (value), "=r" (tmp) : "=r" (value), "=r" (tmp)
: "0" (value), "1" (tmp)); : "0" (value), "1" (tmp));
return value; return value;
#endif
} }
static inline uint16_t CPU_swap_u16(uint16_t value) static inline uint16_t CPU_swap_u16(uint16_t value)