BRK instruction's BranchTarget field now used for efficiently breaking out of loops.
BRK's BranchTarget field actually points to the top of the loop, not the
bottom, since we don't know the later's location yet. In the interpreter,
basically do an indirect jump to update the PC.
diff --git a/src/mesa/shader/prog_print.c b/src/mesa/shader/prog_print.c
index aea11da..3d4a474 100644
--- a/src/mesa/shader/prog_print.c
+++ b/src/mesa/shader/prog_print.c
@@ -332,17 +332,17 @@
_mesa_printf("ENDIF\n");
break;
case OPCODE_BGNLOOP:
- _mesa_printf("BGNLOOP\n");
+ _mesa_printf("BGNLOOP (end at %d)\n", inst->BranchTarget);
return indent + 3;
case OPCODE_ENDLOOP:
_mesa_printf("ENDLOOP (goto %d)\n", inst->BranchTarget);
break;
case OPCODE_BRK:
/* XXX just like BRA */
- _mesa_printf("BRK %u (%s%s)",
- inst->BranchTarget,
+ _mesa_printf("BRK (%s%s) (for loop beginning at %d)",
condcode_string(inst->DstReg.CondMask),
- swizzle_string(inst->DstReg.CondSwizzle, 0, GL_FALSE));
+ swizzle_string(inst->DstReg.CondSwizzle, 0, GL_FALSE),
+ inst->BranchTarget);
print_comment(inst);
break;
case OPCODE_BGNSUB: