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Push mask stacks upon CAL, pop upon RET.

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Still need to handle conditional RET statements...
This commit is contained in:
Brian 2007-10-02 16:24:40 -06:00
parent 4d155a32d2
commit c9dceb17c0
1 changed files with 19 additions and 0 deletions
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19
src/mesa/pipe/tgsi/exec/tgsi_exec.c
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@ -1980,6 +1980,16 @@ exec_instruction(
case TGSI_OPCODE_CAL:
/* skip the call if no execution channels are enabled */
if (mach->ExecMask) {
/* do the call */
/* push Cond, Loop, Cont stacks */
assert(mach->CondStackTop < TGSI_EXEC_MAX_COND_NESTING);
mach->CondStack[mach->CondStackTop++] = mach->CondMask;
assert(mach->LoopStackTop < TGSI_EXEC_MAX_LOOP_NESTING);
mach->LoopStack[mach->LoopStackTop++] = mach->LoopMask;
assert(mach->ContStackTop < TGSI_EXEC_MAX_LOOP_NESTING);
mach->ContStack[mach->ContStackTop++] = mach->ContMask;
/* note that PC was already incremented above */
mach->CallStack[mach->CallStackTop++] = *pc;
*pc = inst->InstructionExtLabel.Label;
@ -1987,6 +1997,15 @@ exec_instruction(
break;
case TGSI_OPCODE_RET:
/* XXX examine ExecMask to determine if we should _really_ return */
/* pop Cond, Loop, Cont stacks */
assert(mach->CondStackTop > 0);
mach->CondMask = mach->CondStack[--mach->CondStackTop];
assert(mach->LoopStackTop > 0);
mach->LoopMask = mach->LoopStack[--mach->LoopStackTop];
assert(mach->ContStackTop > 0);
mach->ContMask = mach->ContStack[--mach->ContStackTop];
assert(mach->CallStackTop >= 0);
if (mach->CallStackTop == 0) {
/* XXX error? */