initial code to get texture sampling limping along

diff --git a/src/mesa/shader/slang/library/slang_common_builtin.gc b/src/mesa/shader/slang/library/slang_common_builtin.gc
index 0e94979d92047b559ac36e0e5eb4b9577317c8b9..44e059f5a0d1a427867f22e2667794579d903ddd 100644 (file)
--- a/src/mesa/shader/slang/library/slang_common_builtin.gc
+++ b/src/mesa/shader/slang/library/slang_common_builtin.gc
@@ -1629,10 +1629,9 @@ vec4 texture1DProj (sampler1D sampler, vec4 coord) {
     return texture1D (sampler, coord.s / coord.q);
 }
 
-vec4 texture2D (sampler2D sampler, vec2 coord) {
-    vec4 texel;
-    __asm vec4_tex2d texel, sampler, coord, 0.0;
-    return texel;
+vec4 texture2D(const sampler2D sampler, const vec2 coord)
+{
+    __asm vec4_tex2d __retVal, coord; // XXX sampler
 }
 
 vec4 texture2DProj (sampler2D sampler, vec3 coord) {

diff --git a/src/mesa/shader/slang/library/slang_common_builtin_gc.h b/src/mesa/shader/slang/library/slang_common_builtin_gc.h
index 3442b062837f7aaa00e44ef479241957d02404a2..69c1960c737f1481df63fb47192e7d35f509c45d 100644 (file)
--- a/src/mesa/shader/slang/library/slang_common_builtin_gc.h
+++ b/src/mesa/shader/slang/library/slang_common_builtin_gc.h
@@ -679,92 +679,91 @@
 111,114,100,0,59,116,0,49,0,0,0,0,1,0,12,0,116,101,120,116,117,114,101,49,68,80,114,111,106,0,1,0,
 0,16,115,97,109,112,108,101,114,0,0,1,0,0,12,99,111,111,114,100,0,0,0,1,8,58,116,101,120,116,117,
 114,101,49,68,0,18,115,97,109,112,108,101,114,0,0,18,99,111,111,114,100,0,59,115,0,18,99,111,111,
-114,100,0,59,113,0,49,0,0,0,0,1,0,12,0,116,101,120,116,117,114,101,50,68,0,1,0,0,17,115,97,109,112,
-108,101,114,0,0,1,0,0,10,99,111,111,114,100,0,0,0,1,3,2,0,12,1,116,101,120,101,108,0,0,0,4,118,101,
-99,52,95,116,101,120,50,100,0,18,116,101,120,101,108,0,0,18,115,97,109,112,108,101,114,0,0,18,99,
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-114,101,50,68,80,114,111,106,0,1,0,0,17,115,97,109,112,108,101,114,0,0,1,0,0,11,99,111,111,114,100,
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-108,0,0,0,4,118,101,99,52,95,116,101,120,51,100,0,18,116,101,120,101,108,0,0,18,115,97,109,112,108,
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-115,104,97,100,111,119,50,68,80,114,111,106,0,1,0,0,21,115,97,109,112,108,101,114,0,0,1,0,0,12,99,
-111,111,114,100,0,0,0,1,8,58,115,104,97,100,111,119,50,68,0,18,115,97,109,112,108,101,114,0,0,58,
-118,101,99,51,0,18,99,111,111,114,100,0,59,115,0,18,99,111,111,114,100,0,59,113,0,49,0,18,99,111,
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+18,99,111,111,114,100,0,0,17,48,0,48,0,0,0,0,8,18,116,101,120,101,108,0,0,0,1,0,12,0,116,101,120,
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+114,100,0,59,116,0,18,99,111,111,114,100,0,59,113,0,49,0,18,99,111,111,114,100,0,59,112,0,18,99,
+111,111,114,100,0,59,113,0,49,0,0,0,0,0,0,1,0,12,0,116,101,120,116,117,114,101,67,117,98,101,0,1,0,
+0,19,115,97,109,112,108,101,114,0,0,1,0,0,11,99,111,111,114,100,0,0,0,1,3,2,0,12,1,116,101,120,101,
+108,0,0,0,4,118,101,99,52,95,116,101,120,99,117,98,101,0,18,116,101,120,101,108,0,0,18,115,97,109,
+112,108,101,114,0,0,18,99,111,111,114,100,0,0,17,48,0,48,0,0,0,0,8,18,116,101,120,101,108,0,0,0,1,
+0,12,0,115,104,97,100,111,119,49,68,0,1,0,0,20,115,97,109,112,108,101,114,0,0,1,0,0,11,99,111,111,
+114,100,0,0,0,1,3,2,0,12,1,116,101,120,101,108,0,0,0,4,118,101,99,52,95,115,104,97,100,49,100,0,18,
+116,101,120,101,108,0,0,18,115,97,109,112,108,101,114,0,0,18,99,111,111,114,100,0,0,17,48,0,48,0,0,
+0,0,8,18,116,101,120,101,108,0,0,0,1,0,12,0,115,104,97,100,111,119,49,68,80,114,111,106,0,1,0,0,20,
+115,97,109,112,108,101,114,0,0,1,0,0,12,99,111,111,114,100,0,0,0,1,8,58,115,104,97,100,111,119,49,
+68,0,18,115,97,109,112,108,101,114,0,0,58,118,101,99,51,0,18,99,111,111,114,100,0,59,115,0,18,99,
+111,111,114,100,0,59,113,0,49,0,17,48,0,48,0,0,0,18,99,111,111,114,100,0,59,112,0,18,99,111,111,
+114,100,0,59,113,0,49,0,0,0,0,0,0,1,0,12,0,115,104,97,100,111,119,50,68,0,1,0,0,21,115,97,109,112,
+108,101,114,0,0,1,0,0,11,99,111,111,114,100,0,0,0,1,3,2,0,12,1,116,101,120,101,108,0,0,0,4,118,101,
+99,52,95,115,104,97,100,50,100,0,18,116,101,120,101,108,0,0,18,115,97,109,112,108,101,114,0,0,18,
+99,111,111,114,100,0,0,17,48,0,48,0,0,0,0,8,18,116,101,120,101,108,0,0,0,1,0,12,0,115,104,97,100,
+111,119,50,68,80,114,111,106,0,1,0,0,21,115,97,109,112,108,101,114,0,0,1,0,0,12,99,111,111,114,100,
+0,0,0,1,8,58,115,104,97,100,111,119,50,68,0,18,115,97,109,112,108,101,114,0,0,58,118,101,99,51,0,
+18,99,111,111,114,100,0,59,115,0,18,99,111,111,114,100,0,59,113,0,49,0,18,99,111,111,114,100,0,59,
+116,0,18,99,111,111,114,100,0,59,113,0,49,0,18,99,111,111,114,100,0,59,112,0,18,99,111,111,114,100,
+0,59,113,0,49,0,0,0,0,0,0,1,0,9,0,110,111,105,115,101,49,0,1,0,0,9,120,0,0,0,1,3,2,0,9,1,97,0,0,0,
+4,102,108,111,97,116,95,110,111,105,115,101,49,0,18,97,0,0,18,120,0,0,0,8,18,97,0,0,0,1,0,9,0,110,
+111,105,115,101,49,0,1,0,0,10,120,0,0,0,1,3,2,0,9,1,97,0,0,0,4,102,108,111,97,116,95,110,111,105,
+115,101,50,0,18,97,0,0,18,120,0,0,0,8,18,97,0,0,0,1,0,9,0,110,111,105,115,101,49,0,1,0,0,11,120,0,
+0,0,1,3,2,0,9,1,97,0,0,0,4,102,108,111,97,116,95,110,111,105,115,101,51,0,18,97,0,0,18,120,0,0,0,8,
+18,97,0,0,0,1,0,9,0,110,111,105,115,101,49,0,1,0,0,12,120,0,0,0,1,3,2,0,9,1,97,0,0,0,4,102,108,111,
+97,116,95,110,111,105,115,101,52,0,18,97,0,0,18,120,0,0,0,8,18,97,0,0,0,1,0,10,0,110,111,105,115,
+101,50,0,1,0,0,9,120,0,0,0,1,8,58,118,101,99,50,0,58,110,111,105,115,101,49,0,18,120,0,0,0,0,58,
+110,111,105,115,101,49,0,18,120,0,17,49,57,0,51,52,0,0,46,0,0,0,0,0,0,1,0,10,0,110,111,105,115,101,
+50,0,1,0,0,10,120,0,0,0,1,8,58,118,101,99,50,0,58,110,111,105,115,101,49,0,18,120,0,0,0,0,58,110,
+111,105,115,101,49,0,18,120,0,58,118,101,99,50,0,17,49,57,0,51,52,0,0,0,17,55,0,54,54,0,0,0,0,46,0,
+0,0,0,0,0,1,0,10,0,110,111,105,115,101,50,0,1,0,0,11,120,0,0,0,1,8,58,118,101,99,50,0,58,110,111,
+105,115,101,49,0,18,120,0,0,0,0,58,110,111,105,115,101,49,0,18,120,0,58,118,101,99,51,0,17,49,57,0,
+51,52,0,0,0,17,55,0,54,54,0,0,0,17,51,0,50,51,0,0,0,0,46,0,0,0,0,0,0,1,0,10,0,110,111,105,115,101,
+50,0,1,0,0,12,120,0,0,0,1,8,58,118,101,99,50,0,58,110,111,105,115,101,49,0,18,120,0,0,0,0,58,110,
+111,105,115,101,49,0,18,120,0,58,118,101,99,52,0,17,49,57,0,51,52,0,0,0,17,55,0,54,54,0,0,0,17,51,
+0,50,51,0,0,0,17,50,0,55,55,0,0,0,0,46,0,0,0,0,0,0,1,0,11,0,110,111,105,115,101,51,0,1,0,0,9,120,0,
+0,0,1,8,58,118,101,99,51,0,58,110,111,105,115,101,49,0,18,120,0,0,0,0,58,110,111,105,115,101,49,0,
+18,120,0,17,49,57,0,51,52,0,0,46,0,0,0,58,110,111,105,115,101,49,0,18,120,0,17,53,0,52,55,0,0,46,0,
+0,0,0,0,0,1,0,11,0,110,111,105,115,101,51,0,1,0,0,10,120,0,0,0,1,8,58,118,101,99,51,0,58,110,111,
+105,115,101,49,0,18,120,0,0,0,0,58,110,111,105,115,101,49,0,18,120,0,58,118,101,99,50,0,17,49,57,0,
+51,52,0,0,0,17,55,0,54,54,0,0,0,0,46,0,0,0,58,110,111,105,115,101,49,0,18,120,0,58,118,101,99,50,0,
+17,53,0,52,55,0,0,0,17,49,55,0,56,53,0,0,0,0,46,0,0,0,0,0,0,1,0,11,0,110,111,105,115,101,51,0,1,0,
+0,11,120,0,0,0,1,8,58,118,101,99,51,0,58,110,111,105,115,101,49,0,18,120,0,0,0,0,58,110,111,105,
+115,101,49,0,18,120,0,58,118,101,99,51,0,17,49,57,0,51,52,0,0,0,17,55,0,54,54,0,0,0,17,51,0,50,51,
+0,0,0,0,46,0,0,0,58,110,111,105,115,101,49,0,18,120,0,58,118,101,99,51,0,17,53,0,52,55,0,0,0,17,49,
+55,0,56,53,0,0,0,17,49,49,0,48,52,0,0,0,0,46,0,0,0,0,0,0,1,0,11,0,110,111,105,115,101,51,0,1,0,0,
+12,120,0,0,0,1,8,58,118,101,99,51,0,58,110,111,105,115,101,49,0,18,120,0,0,0,0,58,110,111,105,115,
+101,49,0,18,120,0,58,118,101,99,52,0,17,49,57,0,51,52,0,0,0,17,55,0,54,54,0,0,0,17,51,0,50,51,0,0,
+0,17,50,0,55,55,0,0,0,0,46,0,0,0,58,110,111,105,115,101,49,0,18,120,0,58,118,101,99,52,0,17,53,0,
+52,55,0,0,0,17,49,55,0,56,53,0,0,0,17,49,49,0,48,52,0,0,0,17,49,51,0,49,57,0,0,0,0,46,0,0,0,0,0,0,
+1,0,12,0,110,111,105,115,101,52,0,1,0,0,9,120,0,0,0,1,8,58,118,101,99,52,0,58,110,111,105,115,101,
+49,0,18,120,0,0,0,0,58,110,111,105,115,101,49,0,18,120,0,17,49,57,0,51,52,0,0,46,0,0,0,58,110,111,
+105,115,101,49,0,18,120,0,17,53,0,52,55,0,0,46,0,0,0,58,110,111,105,115,101,49,0,18,120,0,17,50,51,
+0,53,52,0,0,46,0,0,0,0,0,0,1,0,12,0,110,111,105,115,101,52,0,1,0,0,10,120,0,0,0,1,8,58,118,101,99,
+52,0,58,110,111,105,115,101,49,0,18,120,0,0,0,0,58,110,111,105,115,101,49,0,18,120,0,58,118,101,99,
+50,0,17,49,57,0,51,52,0,0,0,17,55,0,54,54,0,0,0,0,46,0,0,0,58,110,111,105,115,101,49,0,18,120,0,58,
+118,101,99,50,0,17,53,0,52,55,0,0,0,17,49,55,0,56,53,0,0,0,0,46,0,0,0,58,110,111,105,115,101,49,0,
+18,120,0,58,118,101,99,50,0,17,50,51,0,53,52,0,0,0,17,50,57,0,49,49,0,0,0,0,46,0,0,0,0,0,0,1,0,12,
+0,110,111,105,115,101,52,0,1,0,0,11,120,0,0,0,1,8,58,118,101,99,52,0,58,110,111,105,115,101,49,0,
+18,120,0,0,0,0,58,110,111,105,115,101,49,0,18,120,0,58,118,101,99,51,0,17,49,57,0,51,52,0,0,0,17,
+55,0,54,54,0,0,0,17,51,0,50,51,0,0,0,0,46,0,0,0,58,110,111,105,115,101,49,0,18,120,0,58,118,101,99,
+51,0,17,53,0,52,55,0,0,0,17,49,55,0,56,53,0,0,0,17,49,49,0,48,52,0,0,0,0,46,0,0,0,58,110,111,105,
+115,101,49,0,18,120,0,58,118,101,99,51,0,17,50,51,0,53,52,0,0,0,17,50,57,0,49,49,0,0,0,17,51,49,0,
+57,49,0,0,0,0,46,0,0,0,0,0,0,1,0,12,0,110,111,105,115,101,52,0,1,0,0,12,120,0,0,0,1,8,58,118,101,
+99,52,0,58,110,111,105,115,101,49,0,18,120,0,0,0,0,58,110,111,105,115,101,49,0,18,120,0,58,118,101,
+99,52,0,17,49,57,0,51,52,0,0,0,17,55,0,54,54,0,0,0,17,51,0,50,51,0,0,0,17,50,0,55,55,0,0,0,0,46,0,
+0,0,58,110,111,105,115,101,49,0,18,120,0,58,118,101,99,52,0,17,53,0,52,55,0,0,0,17,49,55,0,56,53,0,
+0,0,17,49,49,0,48,52,0,0,0,17,49,51,0,49,57,0,0,0,0,46,0,0,0,58,110,111,105,115,101,49,0,18,120,0,
+58,118,101,99,52,0,17,50,51,0,53,52,0,0,0,17,50,57,0,49,49,0,0,0,17,51,49,0,57,49,0,0,0,17,51,55,0,
+52,56,0,0,0,0,46,0,0,0,0,0,0,0

diff --git a/src/mesa/shader/slang/slang_assemble.h b/src/mesa/shader/slang/slang_assemble.h
index 1225ee44113f190d210829e5990ba8427b2e6c38..8aafeb012ff1fbbba3b1caaaa28b2efd569a6367 100644 (file)
--- a/src/mesa/shader/slang/slang_assemble.h
+++ b/src/mesa/shader/slang/slang_assemble.h
@@ -245,6 +245,7 @@ typedef struct slang_assembly_name_space_
 
 typedef struct {
    GLboolean TempUsed[MAX_PROGRAM_TEMPS];
+   GLuint NumSamplers;
 } slang_gen_context;
 
 

diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index 3fca45ce12178e3ed755b715157f5d13477e366e..3b96ec0a88793819c12e5fc5ff46bf30c0c94b7b 100644 (file)
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -91,6 +91,9 @@ static slang_asm_info AsmInfo[] = {
    { "float_multiply", IR_MUL, 1, 2 },
    { "float_divide", IR_DIV, 1, 2 },
    { "float_power", IR_POW, 1, 2 },
+   /* texture / sampler */
+   { "vec4_tex2d", IR_TEX, 1, 1 },
+   { "vec4_texb2d", IR_TEXB, 1, 3 },
    /* unary op */
    { "int_to_float", IR_I_TO_F, 1, 1 },
    { "float_exp", IR_EXP, 1, 1 },
@@ -791,10 +794,15 @@ _slang_gen_asm(slang_assemble_ctx *A, slang_operation *oper,
       n0 = _slang_gen_operation(A, dest_oper);
       assert(n0->Var);
       assert(n0->Store);
-      free(n0);
 
       n->Store = n0->Store;
       n->Writemask = writemask;
+
+      free(n0);
+   }
+
+   if (info->Opcode == IR_TEX || info->Opcode == IR_TEXB) {
+      n->TexTarget = TEXTURE_2D_INDEX;
    }
 
    return n;
@@ -1571,7 +1579,7 @@ _slang_codegen_function(slang_assemble_ctx * A, slang_function * fun)
    CurFunction = fun;
 
    if (!CurFunction->end_label)
-      CurFunction->end_label = slang_atom_pool_gen(A->atoms, "__endOfFunction_Main");
+      CurFunction->end_label = slang_atom_pool_gen(A->atoms, "__endOfFunc_main_");
 
    n = _slang_gen_operation(A, fun->body);
 
@@ -1583,7 +1591,7 @@ _slang_codegen_function(slang_assemble_ctx * A, slang_function * fun)
    CurFunction = NULL;
 
 
-#if 0
+#if 1
    printf("************* New body for %s *****\n", (char*)fun->header.a_name);
    slang_print_function(fun, 1);
 

diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c
index 8b0999dfcc27807b156600a320d79c5bc45113bf..462cc71938fe44c577790866f5412cf9ad4fe188 100644 (file)
--- a/src/mesa/shader/slang/slang_emit.c
+++ b/src/mesa/shader/slang/slang_emit.c
@@ -92,6 +92,8 @@ static slang_ir_info IrInfo[] = {
    { IR_NOT, "IR_NOT", 0, 1, 1 },
    { IR_VAR, "IR_VAR", 0, 0, 0 },
    { IR_VAR_DECL, "IR_VAR_DECL", 0, 0, 0 },
+   { IR_TEX, "IR_TEX", OPCODE_TEX, 4, 1 },
+   { IR_TEXB, "IR_TEXB", OPCODE_TXB, 4, 2 },
    { IR_FLOAT, "IR_FLOAT", 0, 0, 0 },
    { IR_FIELD, "IR_FIELD", 0, 0, 0 },
    { IR_NOP, NULL, OPCODE_NOP, 0, 0 }
@@ -192,7 +194,10 @@ storage_string(const slang_ir_storage *st)
       sprintf(s, "%s[%d..%d]", files[st->File], st->Index,
               st->Index + st->Size - 1);
 #endif
-   sprintf(s, "%s[%d]", files[st->File], st->Index);
+   if (st->File == 1000)
+      sprintf(s, "sampler");
+   else
+      sprintf(s, "%s[%d]", files[st->File], st->Index);
    return s;
 }
 
@@ -247,8 +252,7 @@ _slang_sizeof_type_specifier(const slang_type_specifier *spec)
    case slang_spec_samplerCube:
    case slang_spec_sampler1DShadow:
    case slang_spec_sampler2DShadow:
-      abort();
-      return 0;
+      return 1; /* special case */
    case slang_spec_struct:
       return sizeof_struct(spec->_struct);
    case slang_spec_array:
@@ -261,7 +265,6 @@ _slang_sizeof_type_specifier(const slang_type_specifier *spec)
 }
 
 
-
 static GLuint
 sizeof_type(const slang_fully_specified_type *t)
 {
@@ -269,6 +272,23 @@ sizeof_type(const slang_fully_specified_type *t)
 }
 
 
+static GLboolean
+is_sampler_type(const slang_fully_specified_type *t)
+{
+   switch (t->specifier.type) {
+   case slang_spec_sampler1D:
+   case slang_spec_sampler2D:
+   case slang_spec_sampler3D:
+   case slang_spec_samplerCube:
+   case slang_spec_sampler1DShadow:
+   case slang_spec_sampler2DShadow:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
 #define IND 0
 void
 slang_print_ir(const slang_ir_node *n, int indent)
@@ -370,6 +390,15 @@ alloc_temporary(slang_gen_context *gc, GLint size)
 }
 
 
+static GLint
+alloc_sampler(slang_gen_context *gc)
+{
+   GLint sampler = gc->NumSamplers;
+   gc->NumSamplers++;
+   return sampler;
+}
+
+
 static GLboolean
 is_temporary(const slang_gen_context *gc, const slang_ir_storage *st)
 {
@@ -637,9 +666,6 @@ slang_alloc_temp_storage(slang_gen_context *gc, slang_ir_node *n, GLint size)
  *   2. Allocate storage for user-declared variables.
  *   3. Allocate intermediate/unnamed storage for complex expressions.
  *   4. other?
- *
- * If gc or prog is NULL, we may only be able to determine the Store->File
- * but not an Index (register).
  */
 void
 slang_resolve_storage(slang_gen_context *gc, slang_ir_node *n,
@@ -666,7 +692,14 @@ slang_resolve_storage(slang_gen_context *gc, slang_ir_node *n,
    if (n->Opcode == IR_VAR_DECL) {
       /* storage declaration */
       assert(n->Var);
-      if (n->Store->Index < 0) { /* XXX assert this? */
+      if (is_sampler_type(&n->Var->type)) {
+         /* i.e. "uniform sampler2D tex;" */
+#define PROGRAM_SAMPLER 1000
+         n->Store->File = PROGRAM_SAMPLER;
+         n->Store->Size = 1; /* never used */
+         n->Store->Index = alloc_sampler(gc);
+      }
+      else if (n->Store->Index < 0) { /* XXX assert this? */
          assert(gc);
          n->Store->File = PROGRAM_TEMPORARY;
          n->Store->Size = sizeof_type(&n->Var->type);
@@ -994,6 +1027,32 @@ emit_jump(const char *target, struct gl_program *prog)
 }
 
 
+static struct prog_instruction *
+emit_tex(slang_gen_context *gc, slang_ir_node *n, struct gl_program *prog)
+{
+   struct gl_fragment_program *fProg = (struct gl_fragment_program *) prog;
+   struct prog_instruction *inst;
+   if (n->Opcode == IR_TEX) {
+      inst = new_instruction(prog, OPCODE_TEX);
+   }
+   else {
+      assert(n->Opcode == IR_TEXB);
+      inst = new_instruction(prog, OPCODE_TXB);
+   }
+
+   storage_to_dst_reg(&inst->DstReg, n->Store, n->Writemask);
+
+   storage_to_src_reg(&inst->SrcReg[0], n->Children[0]->Store,
+                      n->Children[0]->Swizzle);
+
+   inst->TexSrcTarget = n->TexTarget;
+   inst->TexSrcUnit = 0;  /* XXX temp */
+
+   fProg->TexturesUsed[inst->TexSrcUnit] |= (1 << inst->TexSrcTarget);
+
+   return inst;
+}
+
 
 static struct prog_instruction *
 emit(slang_gen_context *gc, slang_ir_node *n, struct gl_program *prog)
@@ -1108,6 +1167,9 @@ emit(slang_gen_context *gc, slang_ir_node *n, struct gl_program *prog)
    case IR_SIN:
    case IR_COS:
       return emit_unop(gc, n, prog);
+   case IR_TEX:
+   case IR_TEXB:
+      return emit_tex(gc, n, prog);
    case IR_NEG:
       return emit_negation(gc, n, prog);
    case IR_LABEL:

diff --git a/src/mesa/shader/slang/slang_ir.h b/src/mesa/shader/slang/slang_ir.h
index 405d799315db0f75a7247ff3831696a301426f81..b43ff1db618c64b313fc6d2c175022fbdf301077 100644 (file)
--- a/src/mesa/shader/slang/slang_ir.h
+++ b/src/mesa/shader/slang/slang_ir.h
@@ -79,6 +79,8 @@ typedef enum
    IR_NOT,     /* logical not */
    IR_VAR,     /* variable reference */
    IR_VAR_DECL,/* var declaration */
+   IR_TEX,     /* texture lookup */
+   IR_TEXB,    /* texture lookup with LOD bias */
    IR_FLOAT,
    IR_FIELD,
    IR_I_TO_F
@@ -106,10 +108,11 @@ typedef struct slang_ir_node_
    const char *Comment;
    const char *Target;
    GLuint Swizzle;
-   GLuint Writemask;  /**< If Op == IR_MOVE */
-   GLfloat Value[4];    /**< If Op == IR_FLOAT */
+   GLuint Writemask;  /**< If Opcode == IR_MOVE */
+   GLfloat Value[4];    /**< If Opcode == IR_FLOAT */
    slang_variable *Var;
    slang_ir_storage *Store;
+   GLuint TexTarget;   /**< If Opcode == IR_TEX or IR_TEXB */
 } slang_ir_node;