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modified set_ipl() register constraints (code was overwriting input operand)

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Markus Fröschle
2013-11-21 19:45:09 +00:00
parent dd340c71a6
commit 768a9ac216
1 changed files with 2 additions and 3 deletions
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5
include/exceptions.h
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@@ -8,7 +8,6 @@ inline uint32_t set_ipl(uint32_t ipl)
uint32_t ret;
__asm__ __volatile__(
" clr.l %[ret]\r\n" /* clear result (mvz.w sr is no valid statement) */
" move.w sr,%[ret]\r\n" /* retrieve status register */
" andi.l #0x07,%[ipl]\n\t" /* mask out ipl bits on new value */
" lsl.l #8,%[ipl]\n\t" /* shift them to position */
@@ -18,9 +17,9 @@ inline uint32_t set_ipl(uint32_t ipl)
" move.w d0,sr\n\t" /* put it in place */
" andi.l #0x0700,%[ret]\r\n" /* mask out ipl bits */
" lsr.l #8,%[ret]\r\n" /* shift them to position */
: [ret] "=d" (ret) /* output */
: [ret] "+g" (ret) /* output */
: [ipl] "r" (ipl) /* input */
: "d0", "memory" /* clobber */
: "d0" /* clobber */
);
return ret;