On Jul 21 2023, Michael Schmitz wrote:
static inline bool clear_bit_unlock_is_negative_byte(unsigned int nr,
volatile unsigned long *p)
{
unsigned char *cp = (unsigned char *) p;
char result;
char mask = 1 << nr; /* nr guaranteed to be < 7 */
__asm__ __volatile__ ("eori.b %1, %2; smi %0"
: "=d" (result)
: "i" (mask), "o" (*(cp+3))
That should use "id" as constraint, so that the compiler can share the
constant with other insns. Also, the third operand is modified, so it
needs to be marked as in/out.
--
Andreas Schwab, schwab@xxxxxxxxxxxxxx
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