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gcc inline assembly tends to use output registers as input if not explicitely told to avoid is: "=&" as constraint to the output register avoids that.

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Markus Fröschle
2013-11-22 10:03:10 +00:00
parent 4ba1c812ef
commit 7197610c76
1 changed files with 2 additions and 2 deletions
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4
BaS_gcc/include/exceptions.h
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@@ -3,7 +3,7 @@
#include <stdint.h> #include <stdint.h>
inline uint32_t set_ipl(uint32_t ipl) static inline uint32_t set_ipl(uint32_t ipl)
{ {
uint32_t ret; uint32_t ret;
@@ -17,7 +17,7 @@ inline uint32_t set_ipl(uint32_t ipl)
" move.w d0,sr\n\t" /* put it in place */ " move.w d0,sr\n\t" /* put it in place */
" andi.l #0x0700,%[ret]\r\n" /* mask out ipl bits */ " andi.l #0x0700,%[ret]\r\n" /* mask out ipl bits */
" lsr.l #8,%[ret]\r\n" /* shift them to position */ " lsr.l #8,%[ret]\r\n" /* shift them to position */
: [ret] "+d" (ret) /* output */ : [ret] "=&d" (ret) /* output */
: [ipl] "d" (ipl) /* input */ : [ipl] "d" (ipl) /* input */
: "d0" /* clobber */ : "d0" /* clobber */
); );