1 files changed, 42 insertions, 35 deletions

diff --git a/mesalib/src/glsl/ir_reader.cpp b/mesalib/src/glsl/ir_reader.cpp
index 405e75b64..22ce03b0d 100644
--- a/mesalib/src/glsl/ir_reader.cpp
+++ b/mesalib/src/glsl/ir_reader.cpp
@@ -676,15 +676,16 @@ ir_reader::read_expression(s_expression *expr)
 {
    s_expression *s_type;
    s_symbol *s_op;
-   s_expression *s_arg1;
+   s_expression *s_arg[3];
 
-   s_pattern pat[] = { "expression", s_type, s_op, s_arg1 };
+   s_pattern pat[] = { "expression", s_type, s_op, s_arg[0] };
    if (!PARTIAL_MATCH(expr, pat)) {
       ir_read_error(expr, "expected (expression <type> <operator> "
 			  "<operand> [<operand>])");
       return NULL;
    }
-   s_expression *s_arg2 = (s_expression *) s_arg1->next; // may be tail sentinel
+   s_arg[1] = (s_expression *) s_arg[0]->next; // may be tail sentinel
+   s_arg[2] = (s_expression *) s_arg[1]->next; // may be tail sentinel or NULL
 
    const glsl_type *type = read_type(s_type);
    if (type == NULL)
@@ -697,35 +698,27 @@ ir_reader::read_expression(s_expression *expr)
       return NULL;
    }
     
-   unsigned num_operands = ir_expression::get_num_operands(op);
-   if (num_operands == 1 && !s_arg1->next->is_tail_sentinel()) {
-      ir_read_error(expr, "expected (expression <type> %s <operand>)",
-		    s_op->value());
+   int num_operands = -3; /* skip "expression" <type> <operation> */
+   foreach_list(n, &((s_list *) expr)->subexpressions)
+      ++num_operands;
+
+   int expected_operands = ir_expression::get_num_operands(op);
+   if (num_operands != expected_operands) {
+      ir_read_error(expr, "found %d expression operands, expected %d",
+                    num_operands, expected_operands);
       return NULL;
    }
 
-   ir_rvalue *arg1 = read_rvalue(s_arg1);
-   ir_rvalue *arg2 = NULL;
-   if (arg1 == NULL) {
-      ir_read_error(NULL, "when reading first operand of %s", s_op->value());
-      return NULL;
-   }
-
-   if (num_operands == 2) {
-      if (s_arg2->is_tail_sentinel() || !s_arg2->next->is_tail_sentinel()) {
-	 ir_read_error(expr, "expected (expression <type> %s <operand> "
-			     "<operand>)", s_op->value());
-	 return NULL;
-      }
-      arg2 = read_rvalue(s_arg2);
-      if (arg2 == NULL) {
-	 ir_read_error(NULL, "when reading second operand of %s",
-		       s_op->value());
-	 return NULL;
+   ir_rvalue *arg[3] = {NULL, NULL, NULL};
+   for (int i = 0; i < num_operands; i++) {
+      arg[i] = read_rvalue(s_arg[i]);
+      if (arg[i] == NULL) {
+         ir_read_error(NULL, "when reading operand #%d of %s", i, s_op->value());
+         return NULL;
       }
    }
 
-   return new(mem_ctx) ir_expression(op, type, arg1, arg2);
+   return new(mem_ctx) ir_expression(op, type, arg[0], arg[1], arg[2]);
 }
 
 ir_swizzle *
@@ -918,6 +911,7 @@ ir_reader::read_texture(s_expression *expr)
    s_expression *s_proj = NULL;
    s_list *s_shadow = NULL;
    s_expression *s_lod = NULL;
+   s_expression *s_sample_index = NULL;
 
    ir_texture_opcode op = ir_tex; /* silence warning */
 
@@ -925,6 +919,8 @@ ir_reader::read_texture(s_expression *expr)
       { "tex", s_type, s_sampler, s_coord, s_offset, s_proj, s_shadow };
    s_pattern txf_pattern[] =
       { "txf", s_type, s_sampler, s_coord, s_offset, s_lod };
+   s_pattern txf_ms_pattern[] =
+      { "txf_ms", s_type, s_sampler, s_coord, s_sample_index };
    s_pattern txs_pattern[] =
       { "txs", s_type, s_sampler, s_lod };
    s_pattern other_pattern[] =
@@ -934,6 +930,8 @@ ir_reader::read_texture(s_expression *expr)
       op = ir_tex;
    } else if (MATCH(expr, txf_pattern)) {
       op = ir_txf;
+   } else if (MATCH(expr, txf_ms_pattern)) {
+      op = ir_txf_ms;
    } else if (MATCH(expr, txs_pattern)) {
       op = ir_txs;
    } else if (MATCH(expr, other_pattern)) {
@@ -973,18 +971,20 @@ ir_reader::read_texture(s_expression *expr)
 	 return NULL;
       }
 
-      // Read texel offset - either 0 or an rvalue.
-      s_int *si_offset = SX_AS_INT(s_offset);
-      if (si_offset == NULL || si_offset->value() != 0) {
-	 tex->offset = read_rvalue(s_offset);
-	 if (tex->offset == NULL) {
-	    ir_read_error(s_offset, "expected 0 or an expression");
-	    return NULL;
-	 }
+      if (op != ir_txf_ms) {
+         // Read texel offset - either 0 or an rvalue.
+         s_int *si_offset = SX_AS_INT(s_offset);
+         if (si_offset == NULL || si_offset->value() != 0) {
+            tex->offset = read_rvalue(s_offset);
+            if (tex->offset == NULL) {
+               ir_read_error(s_offset, "expected 0 or an expression");
+               return NULL;
+            }
+         }
       }
    }
 
-   if (op != ir_txf && op != ir_txs) {
+   if (op != ir_txf && op != ir_txf_ms && op != ir_txs) {
       s_int *proj_as_int = SX_AS_INT(s_proj);
       if (proj_as_int && proj_as_int->value() == 1) {
 	 tex->projector = NULL;
@@ -1027,6 +1027,13 @@ ir_reader::read_texture(s_expression *expr)
 	 return NULL;
       }
       break;
+   case ir_txf_ms:
+      tex->lod_info.sample_index = read_rvalue(s_sample_index);
+      if (tex->lod_info.sample_index == NULL) {
+         ir_read_error(NULL, "when reading sample_index in (txf_ms ...)");
+         return NULL;
+      }
+      break;
    case ir_txd: {
       s_expression *s_dx, *s_dy;
       s_pattern dxdy_pat[] = { s_dx, s_dy };