softpipe: fix texture sampling from 1D texture array

This is the first part of a fix to piglit glsl-fs-shadow1DArray

also fix the passing of unused r[2] in the normal 1D case.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/gallium/auxiliary/tgsi/tgsi_exec.c

@@ -1794,9 +1794,22 @@ exec_tex(struct tgsi_exec_machine *mach,
       break;
 
    case TGSI_TEXTURE_1D_ARRAY:
+      FETCH(&r[0], 0, CHAN_X);
+      FETCH(&r[1], 0, CHAN_Y);
+
+      if (modifier == TEX_MODIFIER_PROJECTED) {
+         micro_div(&r[0], &r[0], &r[3]);
+      }
+
+      fetch_texel(mach->Samplers[unit],
+                  &r[0], &r[1], &ZeroVec, lod,     /* S, T, P, LOD */
+                  control,
+                  &r[0], &r[1], &r[2], &r[3]);  /* outputs */
+      break;
    case TGSI_TEXTURE_SHADOW1D_ARRAY:
       FETCH(&r[0], 0, CHAN_X);
       FETCH(&r[1], 0, CHAN_Y);
+      FETCH(&r[2], 0, CHAN_Z);
 
       if (modifier == TEX_MODIFIER_PROJECTED) {
          micro_div(&r[0], &r[0], &r[3]);