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Wed Feb 14 00:21:17 1996 David Mosberger-Tang <davidm@azstarnet.com>

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* sysdeps/alpha/__longjmp.c (__longjmp): moved dummy while loop
	to end of function to avoid a jump across NOPs.
This commit is contained in:
Roland McGrath 1996-03-19 19:51:41 +00:00
parent 56759be20a
commit d153ca687c
1 changed files with 11 additions and 9 deletions
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20
sysdeps/alpha/__longjmp.c
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@ -38,6 +38,8 @@ register double
void
__longjmp (__jmp_buf env, int val)
{
register long int retval asm ("$0");
/* Restore the integer registers. */
r9 = env[0].__9;
r10 = env[0].__10;
@ -73,18 +75,18 @@ __longjmp (__jmp_buf env, int val)
precisely the FP and SP the desired environment needs,
we must avoid the compiler doing anything with the stack. */
asm volatile
("cmoveq %1, 1, %0\n\t" /* $0 = val ?: 1; */
"ret $31, (%2), 1" /* return $0 */
: "=r" (retval)
/* The "0" constraint should force VAL into $0. */
: "0" (val), "r" (retpc));
while (1)
{
/* The loop is just to avoid `volatile function does return' warnings.
The instruction will only be executed once. */
register long int retval asm ("$0");
asm volatile
("cmoveq %1, 1, %0\n\t" /* $0 = val ?: 1; */
"ret $31, (%2), 1" /* return $0 */
: "=r" (retval)
/* The "0" constraint should force VAL into $0. */
: "0" (val), "r" (retpc));
asm volatile ("");
}
}