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if we hit RET w/ empty call stack, halt

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This commit is contained in:
Brian 2007-10-26 12:24:28 -06:00
parent 6b30f3888e
commit f92083c338
1 changed files with 7 additions and 7 deletions
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14
src/mesa/pipe/tgsi/exec/tgsi_exec.c
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@ -2082,6 +2082,13 @@ exec_instruction(
if (mach->ExecMask == 0x0) { if (mach->ExecMask == 0x0) {
/* really return now (otherwise, keep executing */ /* really return now (otherwise, keep executing */
if (mach->CallStackTop == 0) {
/* returning from main() */
*pc = -1;
return;
}
*pc = mach->CallStack[--mach->CallStackTop];
/* pop the Cond, Loop, Cont stacks */ /* pop the Cond, Loop, Cont stacks */
assert(mach->CondStackTop > 0); assert(mach->CondStackTop > 0);
mach->CondMask = mach->CondStack[--mach->CondStackTop]; mach->CondMask = mach->CondStack[--mach->CondStackTop];
@ -2089,16 +2096,9 @@ exec_instruction(
mach->LoopMask = mach->LoopStack[--mach->LoopStackTop]; mach->LoopMask = mach->LoopStack[--mach->LoopStackTop];
assert(mach->ContStackTop > 0); assert(mach->ContStackTop > 0);
mach->ContMask = mach->ContStack[--mach->ContStackTop]; mach->ContMask = mach->ContStack[--mach->ContStackTop];
assert(mach->FuncStackTop > 0); assert(mach->FuncStackTop > 0);
mach->FuncMask = mach->FuncStack[--mach->FuncStackTop]; mach->FuncMask = mach->FuncStack[--mach->FuncStackTop];
assert(mach->CallStackTop >= 0);
if (mach->CallStackTop == 0) {
/* XXX error? */
return;
}
*pc = mach->CallStack[--mach->CallStackTop];
UPDATE_EXEC_MASK(mach); UPDATE_EXEC_MASK(mach);
} }
break; break;