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2002-10-04 Jay Monkman <jtm@smoothsmoothie.com>

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* rtems/score/cpu.h: Fix u16 and u32 swap routines.
This commit is contained in:
Joel Sherrill
2002-10-04 13:24:06 +00:00
parent 2b30225a64
commit b32fe7938a
2 changed files with 19 additions and 15 deletions
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4
cpukit/score/cpu/arm/ChangeLog
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@@ -1,3 +1,7 @@
2002-10-04 Jay Monkman <jtm@smoothsmoothie.com>
* rtems/score/cpu.h: Fix u16 and u32 swap routines.
2002-08-05 Joel Sherrill <joel@OARcorp.com>
* rtems/score/cpu.h, rtems/score/types.h: Updated to fix some typos.

30
cpukit/score/cpu/arm/rtems/score/cpu.h
View File

@@ -897,27 +897,27 @@ static inline unsigned int CPU_swap_u32(
unsigned int value
)
{
unsigned32 tmp;
asm volatile ("EOR %1, %0, %0, ROR #16\n" \
"BIC %1, %1, #0xff0000\n" \
"MOV %0, %0, ROR #8\n" \
"EOR %0, %0, %1, LSR #8\n" \
: "=&r" (value), "=&r" (tmp) \
: "0" (value));
unsigned32 tmp = value; /* make compiler warnings go away */
asm volatile ("EOR %1, %0, %0, ROR #16\n"
"BIC %1, %1, #0xff0000\n"
"MOV %0, %0, ROR #8\n"
"EOR %0, %0, %1, LSR #8\n"
: "=r" (value), "=r" (tmp)
: "0" (value), "1" (tmp));
return value;
}
static inline unsigned16 CPU_swap_u16(unsigned16 value)
{
unsigned32 tmp = value; /* make compiler warnings go away */
asm volatile ("MOV %1, %0, LSR #8\n" \
"BIC %0, %0, #0xff00\n" \
"MOV %0, %0, LSL #8\n" \
"ORR %0, %0, %1\n" \
: "=&r" (value), "=&r" (tmp) \
: "0" (value));
return value;
unsigned16 lower;
unsigned16 upper;
value = value & (unsigned16) 0xffff;
lower = (value >> 8) ;
upper = (value << 8) ;
return (lower | upper);
}
#ifdef __cplusplus