Mesa (master): st/mesa: fix indirect addressing of input/output regs

[Brian Paul]

Module: Mesa
Branch: master
Commit: dfe9dec04f707d61633665785600156d282d0d39
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=dfe9dec04f707d61633665785600156d282d0d39

Author: Brian Paul <brianp at vmware.com>
Date:   Wed Jun  2 17:37:42 2010 -0600

st/mesa: fix indirect addressing of input/output regs

This fixes an issue that was missed with commit
9f544394c1d059ce09c8bb2b5e11f5e871c7915f.
Fixes piglit glsl-texcoord-array.shader_test

---

 src/mesa/state_tracker/st_mesa_to_tgsi.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c
index 6df6cdf..35016d8 100644
--- a/src/mesa/state_tracker/st_mesa_to_tgsi.c
+++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c
@@ -319,10 +319,15 @@ translate_src( struct st_translate *t,
 
    if (SrcReg->RelAddr) {
       src = ureg_src_indirect( src, ureg_src(t->address[0]));
-      /* If SrcReg->Index was negative, it was set to zero in
-       * src_register().  Reassign it now.
-       */
-      src.Index = SrcReg->Index;
+      if (SrcReg->File != PROGRAM_INPUT &&
+          SrcReg->File != PROGRAM_OUTPUT) {
+         /* If SrcReg->Index was negative, it was set to zero in
+          * src_register().  Reassign it now.  But don't do this
+          * for input/output regs since they get remapped while
+          * const buffers don't.
+          */
+         src.Index = SrcReg->Index;
+      }
    }
 
    return src;