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inline asm: Accept 'p' constraint and 'P' template mod

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'p' is conservatively the same as 'r' and 'P' as template
modifier can be ignored in TCC.
This commit is contained in:
Michael Matz 2016-06-29 18:31:45 +02:00
parent 63e3ff7cca
commit 253afeed1e
3 changed files with 15 additions and 1 deletions
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2
i386-asm.c
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@ -1002,6 +1002,7 @@ static inline int constraint_priority(const char *str)
pr = 2;
break;
case 'r':
case 'p':
pr = 3;
break;
case 'N':
@ -1170,6 +1171,7 @@ ST_FUNC void asm_compute_constraints(ASMOperand *operands,
}
goto try_next;
case 'r':
case 'p': /* A general address, for x86(64) any register is acceptable*/
/* any general register */
for(reg = 0; reg < 8; reg++) {
if (!is_reg_allocated(reg))

5
tccasm.c
View File

@ -991,7 +991,10 @@ static void subst_asm_operands(ASMOperand *operands, int nb_operands,
modifier = 0;
if (*str == 'c' || *str == 'n' ||
*str == 'b' || *str == 'w' ||
*str == 'h' || *str == 'k' || *str == 'q')
*str == 'h' || *str == 'k' || *str == 'q' ||
/* P in GCC would add "@PLT" to symbol refs in PIC mode
Ignore this in TCC. */
*str == 'P')
modifier = *str++;
index = find_constraint(operands, nb_operands, str, &str);
if (index < 0)

9
tests/tcctest.c
View File

@ -2600,6 +2600,14 @@ int fls64(unsigned long long x)
}
#endif
void other_constraints_test(void)
{
unsigned long ret;
int var;
__asm__ volatile ("movq %P1,%0" : "=r" (ret) : "p" (&var));
printf ("oc1: %d\n", ret == (unsigned long)&var);
}
unsigned int set;
void asm_test(void)
@ -2633,6 +2641,7 @@ void asm_test(void)
s1.b = 43;
printf("mconstraint: %d", mconstraint_test(&s2));
printf(" %d %d\n", s1.a, s1.b);
other_constraints_test();
set = 0xff;
sigdelset1(&set, 2);
sigaddset1(&set, 16);