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x86-asm: Accept 'q' modifier

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In inline extended asm '%q1' refers to the 64bit register of operand 1.
This commit is contained in:
Michael Matz 2016-06-27 20:21:57 +02:00
parent 8531de319a
commit d5d881d9e9
2 changed files with 12 additions and 1 deletions
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2
tccasm.c
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@ -946,7 +946,7 @@ 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 == 'h' || *str == 'k' || *str == 'q')
modifier = *str++;
index = find_constraint(operands, nb_operands, str, &str);
if (index < 0)

11
tests/tcctest.c
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@ -2584,6 +2584,17 @@ unsigned long mconstraint_test(struct struct1231 *r)
return ret + a[0];
}
#ifdef __x86_64__
int fls64(unsigned long long x)
{
int bitpos = -1;
asm("bsrq %1,%q0"
: "+r" (bitpos)
: "rm" (x));
return bitpos + 1;
}
#endif
unsigned int set;
void asm_test(void)