glsl: Fix handling of OPCODE_PRINT for no registers case.
A register file value is unsigned so could never be -1. A
value of 0 also aliased to PROGRAM_TEMPORARY.
If an OPCODE_PRINT has no registers to print, set the register
file value to PROGRAM_UNDEFINED and check for that value when
executing this instruction.
diff --git a/src/mesa/shader/prog_execute.c b/src/mesa/shader/prog_execute.c
index 37750cc..0067512 100644
--- a/src/mesa/shader/prog_execute.c
+++ b/src/mesa/shader/prog_execute.c
@@ -1767,7 +1767,7 @@
break;
case OPCODE_PRINT:
{
- if (inst->SrcReg[0].File != -1) {
+ if (inst->SrcReg[0].File != PROGRAM_UNDEFINED) {
GLfloat a[4];
fetch_vector4(&inst->SrcReg[0], machine, a);
printf("%s%g, %g, %g, %g\n", (const char *) inst->Data,