Naive implementation of IF/ELSE/ENDIF.

Handle TGSI labels correctly.
Enhance MESA opcode info queries.

7 files changed, 277 insertions, 114 deletions

diff --git a/src/mesa/pipe/tgsi/core/tgsi_dump.c b/src/mesa/pipe/tgsi/core/tgsi_dump.c
index 641339c8960..f1773ac9080 100644
--- a/src/mesa/pipe/tgsi/core/tgsi_dump.c
+++ b/src/mesa/pipe/tgsi/core/tgsi_dump.c
@@ -788,7 +788,7 @@ dump_instruction_short(
    switch( inst->Instruction.Opcode ) {
    case TGSI_OPCODE_IF:
    case TGSI_OPCODE_ELSE:
-      TXT( " : " );
+      TXT( " :" );
       UID( inst->InstructionExtLabel.Label );
       break;
    }
diff --git a/src/mesa/pipe/tgsi/core/tgsi_exec.c b/src/mesa/pipe/tgsi/core/tgsi_exec.c
index 2bd2e7ce051..71dfbc10f31 100644
--- a/src/mesa/pipe/tgsi/core/tgsi_exec.c
+++ b/src/mesa/pipe/tgsi/core/tgsi_exec.c
@@ -111,6 +111,7 @@ tgsi_exec_prepare(
 {
    struct tgsi_parse_context parse;
    GLuint k;
+   GLuint instno = 0;
 
    mach->ImmLimit = 0;
    labels->count = 0;
@@ -124,26 +125,30 @@ tgsi_exec_prepare(
    while( !tgsi_parse_end_of_tokens( &parse ) ) {
       GLuint pointer = parse.Position;
       GLuint i;
+
       tgsi_parse_token( &parse );
       switch( parse.FullToken.Token.Type ) {
       case TGSI_TOKEN_TYPE_DECLARATION:
          break;
+
       case TGSI_TOKEN_TYPE_IMMEDIATE:
          assert( (parse.FullToken.FullImmediate.Immediate.Size - 1) % 4 == 0 );
          assert( mach->ImmLimit + (parse.FullToken.FullImmediate.Immediate.Size - 1) / 4 <= 256 );
+
          for( i = 0; i < parse.FullToken.FullImmediate.Immediate.Size - 1; i++ ) {
             mach->Imms[mach->ImmLimit + i / 4][i % 4] = parse.FullToken.FullImmediate.u.ImmediateFloat32[i].Float;
          }
          mach->ImmLimit += (parse.FullToken.FullImmediate.Immediate.Size - 1) / 4;
          break;
+
       case TGSI_TOKEN_TYPE_INSTRUCTION:
-         if( parse.FullToken.FullInstruction.InstructionExtLabel.Label ) {
-            assert( labels->count < 128 );
-            labels->labels[labels->count][0] = parse.FullToken.FullInstruction.InstructionExtLabel.Label;
-            labels->labels[labels->count][1] = pointer;
-            labels->count++;
-         }
+         assert( labels->count < 128 );
+
+         labels->labels[labels->count][0] = instno;
+         labels->labels[labels->count][1] = pointer;
+         labels->count++;
          break;
+
       default:
          assert( 0 );
       }
@@ -1233,22 +1238,6 @@ fetch_texel_3d( GLcontext *ctx,
 }
 #endif
 
-static GLuint
-map_label(
-   GLuint label,
-   struct tgsi_exec_labels *labels )
-{
-   GLuint i;
-
-   for( i = 0; i < labels->count; i++ ) {
-      if( labels->labels[i][0] == label ) {
-         return labels->labels[i][1];
-      }
-   }
-   assert( 0 );
-   return 0;
-}
-
 static void
 exec_instruction(
    struct tgsi_exec_machine *mach,
@@ -1988,7 +1977,43 @@ exec_instruction(
       break;
 
    case TGSI_OPCODE_IF:
-      assert (0);
+      {
+         GLuint cond = 0;
+         struct tgsi_exec_cond_state *state;
+
+         /* Allocate condition state. */
+         assert( mach->CondStack.Index > 0 );
+         mach->CondStack.Index--;
+
+         /* Evaluate the condition mask. */
+         FETCH( &r[0], 0, CHAN_X );
+         if( r[0].u[0] ) {
+            cond |= 1;
+         }
+         if( r[0].u[1] ) {
+            cond |= 2;
+         }
+         if( r[0].u[2] ) {
+            cond |= 4;
+         }
+         if( r[0].u[3] ) {
+            cond |= 8;
+         }
+
+         state = &mach->CondStack.States[mach->CondStack.Index];
+
+         /* Initialize the If portion of condition state. */
+         memcpy(
+            state->IfPortion.TempsAddrs,
+            mach->Temps,
+            sizeof( state->IfPortion.TempsAddrs ) );
+         memcpy(
+            state->IfPortion.Outputs,
+            mach->Outputs,
+            sizeof( state->IfPortion.Outputs ) );
+         state->Condition = cond;
+         state->WasElse = GL_FALSE;
+      }
       break;
 
    case TGSI_OPCODE_LOOP:
@@ -2000,12 +2025,107 @@ exec_instruction(
       break;
 
    case TGSI_OPCODE_ELSE:
-      assert (0);
+      {
+         struct tgsi_exec_cond_state *state;
+         struct tgsi_exec_cond_regs temp;
+
+         state = &mach->CondStack.States[mach->CondStack.Index];
+
+         /* Copy the results of the If portion to temporary storage. */
+         memcpy(
+            temp.TempsAddrs,
+            mach->Temps,
+            sizeof( temp.TempsAddrs ) );
+         memcpy(
+            temp.Outputs,
+            mach->Outputs,
+            sizeof( temp.Outputs ) );
+
+         /* Restore the state of registers from before the If statement. */
+         memcpy(
+            mach->Temps,
+            state->IfPortion.TempsAddrs,
+            sizeof( state->IfPortion.TempsAddrs ) );
+         memcpy(
+            mach->Outputs,
+            state->IfPortion.Outputs,
+            sizeof( state->IfPortion.Outputs ) );
+
+         /* Save the results of If portion. */
+         memcpy(
+            &state->IfPortion,
+            &temp,
+            sizeof( state->IfPortion ) );
+         state->WasElse = GL_TRUE;
+      }
       break;
 
    case TGSI_OPCODE_ENDIF:
-       assert (0);
-       break;
+      {
+         struct tgsi_exec_cond_state *state;
+         GLuint i;
+
+         state = &mach->CondStack.States[mach->CondStack.Index];
+
+         if( state->WasElse ) {
+            /* Save the results of Else portion. */
+            memcpy(
+               state->ElsePortion.TempsAddrs,
+               mach->Temps,
+               sizeof( state->ElsePortion.TempsAddrs ) );
+            memcpy(
+               state->ElsePortion.Outputs,
+               mach->Outputs,
+               sizeof( state->ElsePortion.Outputs ) );
+         }
+         else {
+            /* Copy the state of registers from before the If statement to Else portion. */
+            memcpy(
+               &state->ElsePortion,
+               &state->IfPortion,
+               sizeof( state->ElsePortion ) );
+
+            /* Save the results of the If portion. */
+            memcpy(
+               state->IfPortion.TempsAddrs,
+               mach->Temps,
+               sizeof( state->IfPortion.TempsAddrs ) );
+            memcpy(
+               state->IfPortion.Outputs,
+               mach->Outputs,
+               sizeof( state->IfPortion.Outputs ) );
+         }
+
+         /* Mix the If and Else portions based on condition mask. */
+         for( i = 0; i < 4; i++ ) {
+            struct tgsi_exec_cond_regs *regs;
+            GLuint j;
+
+            if( state->Condition & (1 << i) ) {
+               regs = &state->IfPortion;
+            }
+            else {
+               regs = &state->ElsePortion;
+            }
+
+            for( j = 0; j < TGSI_EXEC_NUM_TEMPS + TGSI_EXEC_NUM_ADDRS; j++ ) {
+               mach->Temps[j].xyzw[0].u[i] = regs->TempsAddrs[j].xyzw[0].u[i];
+               mach->Temps[j].xyzw[1].u[i] = regs->TempsAddrs[j].xyzw[1].u[i];
+               mach->Temps[j].xyzw[2].u[i] = regs->TempsAddrs[j].xyzw[2].u[i];
+               mach->Temps[j].xyzw[3].u[i] = regs->TempsAddrs[j].xyzw[3].u[i];
+            }
+            for( j = 0; j < 2; j++ ) {
+               mach->Outputs[j].xyzw[0].u[i] = regs->Outputs[j].xyzw[0].u[i];
+               mach->Outputs[j].xyzw[1].u[i] = regs->Outputs[j].xyzw[1].u[i];
+               mach->Outputs[j].xyzw[2].u[i] = regs->Outputs[j].xyzw[2].u[i];
+               mach->Outputs[j].xyzw[3].u[i] = regs->Outputs[j].xyzw[3].u[i];
+            }
+         }
+
+         /* Release condition state. */
+         mach->CondStack.Index++;
+      }
+      break;
 
    case TGSI_OPCODE_ENDLOOP:
        assert (0);
@@ -2214,6 +2334,8 @@ tgsi_exec_machine_run2(
       mach->Primitives[0] = 0;
    }
 
+   mach->CondStack.Index = 8;
+
    k = tgsi_parse_init( &parse, mach->Tokens );
    if (k != TGSI_PARSE_OK) {
       printf("Problem parsing!\n");
diff --git a/src/mesa/pipe/tgsi/core/tgsi_exec.h b/src/mesa/pipe/tgsi/core/tgsi_exec.h
index d2ff40cabbc..b92d1b59189 100644
--- a/src/mesa/pipe/tgsi/core/tgsi_exec.h
+++ b/src/mesa/pipe/tgsi/core/tgsi_exec.h
@@ -85,6 +85,29 @@ struct tgsi_exec_labels
 #define TGSI_EXEC_NUM_TEMPS   (32 + 4)
 #define TGSI_EXEC_NUM_ADDRS   1
 
+/* XXX: This is temporary */
+struct tgsi_exec_cond_regs
+{
+   struct tgsi_exec_vector    TempsAddrs[TGSI_EXEC_NUM_TEMPS + TGSI_EXEC_NUM_ADDRS];
+   struct tgsi_exec_vector    Outputs[2];    /* XXX: That's just enough for fragment shader only! */
+};
+
+/* XXX: This is temporary */
+struct tgsi_exec_cond_state
+{
+   struct tgsi_exec_cond_regs IfPortion;
+   struct tgsi_exec_cond_regs ElsePortion;
+   GLuint                     Condition;
+   GLboolean                  WasElse;
+};
+
+/* XXX: This is temporary */
+struct tgsi_exec_cond_stack
+{
+   struct tgsi_exec_cond_state   States[8];
+   GLuint                        Index;      /* into States[] */
+};
+
 struct tgsi_exec_machine
 {
    /*
@@ -112,6 +135,8 @@ struct tgsi_exec_machine
    GLuint                        Processor;
 
    GLuint                        *Primitives;
+
+   struct tgsi_exec_cond_stack   CondStack;
 #if XXX_SSE
    struct x86_function           Function;
 #endif
diff --git a/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c b/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c
index 654ec9ac68a..107b6bd2a36 100644
--- a/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c
+++ b/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c
@@ -168,7 +168,7 @@ compile_instruction(
    *fullinst = tgsi_default_full_instruction();

 

    fullinst->Instruction.Saturate = convert_sat( inst->SaturateMode );

-   fullinst->Instruction.NumDstRegs = 1;

+   fullinst->Instruction.NumDstRegs = _mesa_num_inst_dst_regs( inst->Opcode );

    fullinst->Instruction.NumSrcRegs = _mesa_num_inst_src_regs( inst->Opcode );

 

    fulldst = &fullinst->FullDstRegisters[0];

diff --git a/src/mesa/shader/prog_instruction.c b/src/mesa/shader/prog_instruction.c
index d6b5652a276..c84c76fd5bd 100644
--- a/src/mesa/shader/prog_instruction.c
+++ b/src/mesa/shader/prog_instruction.c
@@ -126,6 +126,7 @@ struct instruction_info
    gl_inst_opcode Opcode;
    const char *Name;
    GLuint NumSrcRegs;
+   GLuint NumDstRegs;
 };
 
 /**
@@ -133,91 +134,91 @@ struct instruction_info
  * \note Opcode should equal array index!
  */
 static const struct instruction_info InstInfo[MAX_OPCODE] = {
-   { OPCODE_NOP,    "NOP",   0 },
-   { OPCODE_ABS,    "ABS",   1 },
-   { OPCODE_ADD,    "ADD",   2 },
-   { OPCODE_ARA,    "ARA",   1 },
-   { OPCODE_ARL,    "ARL",   1 },
-   { OPCODE_ARL_NV, "ARL",   1 },
-   { OPCODE_ARR,    "ARL",   1 },
-   { OPCODE_BGNLOOP,"BGNLOOP", 0 },
-   { OPCODE_BGNSUB, "BGNSUB", 0 },
-   { OPCODE_BRA,    "BRA",   0 },
-   { OPCODE_BRK,    "BRK",   0 },
-   { OPCODE_CAL,    "CAL",   0 },
-   { OPCODE_CMP,    "CMP",   3 },
-   { OPCODE_CONT,   "CONT",  0 },
-   { OPCODE_COS,    "COS",   1 },
-   { OPCODE_DDX,    "DDX",   1 },
-   { OPCODE_DDY,    "DDY",   1 },
-   { OPCODE_DP3,    "DP3",   2 },
-   { OPCODE_DP4,    "DP4",   2 },
-   { OPCODE_DPH,    "DPH",   2 },
-   { OPCODE_DST,    "DST",   2 },
-   { OPCODE_ELSE,   "ELSE",  0 },
-   { OPCODE_END,    "END",   0 },
-   { OPCODE_ENDIF,  "ENDIF", 0 },
-   { OPCODE_ENDLOOP,"ENDLOOP", 0 },
-   { OPCODE_ENDSUB, "ENDSUB", 0 },
-   { OPCODE_EX2,    "EX2",   1 },
-   { OPCODE_EXP,    "EXP",   1 },
-   { OPCODE_FLR,    "FLR",   1 },
-   { OPCODE_FRC,    "FRC",   1 },
-   { OPCODE_IF,     "IF",    0 },
-   { OPCODE_INT,    "INT",   1 },
-   { OPCODE_KIL,    "KIL",   1 },
-   { OPCODE_KIL_NV, "KIL",   0 },
-   { OPCODE_LG2,    "LG2",   1 },
-   { OPCODE_LIT,    "LIT",   1 },
-   { OPCODE_LOG,    "LOG",   1 },
-   { OPCODE_LRP,    "LRP",   3 },
-   { OPCODE_MAD,    "MAD",   3 },
-   { OPCODE_MAX,    "MAX",   2 },
-   { OPCODE_MIN,    "MIN",   2 },
-   { OPCODE_MOV,    "MOV",   1 },
-   { OPCODE_MUL,    "MUL",   2 },
-   { OPCODE_NOISE1, "NOISE1", 1 },
-   { OPCODE_NOISE2, "NOISE2", 1 },
-   { OPCODE_NOISE3, "NOISE3", 1 },
-   { OPCODE_NOISE4, "NOISE4", 1 },
-   { OPCODE_PK2H,   "PK2H",  1 },
-   { OPCODE_PK2US,  "PK2US", 1 },
-   { OPCODE_PK4B,   "PK4B",  1 },
-   { OPCODE_PK4UB,  "PK4UB", 1 },
-   { OPCODE_POW,    "POW",   2 },
-   { OPCODE_POPA,   "POPA",  0 },
-   { OPCODE_PRINT,  "PRINT", 1 },
-   { OPCODE_PUSHA,  "PUSHA", 0 },
-   { OPCODE_RCC,    "RCC",   1 },
-   { OPCODE_RCP,    "RCP",   1 },
-   { OPCODE_RET,    "RET",   0 },
-   { OPCODE_RFL,    "RFL",   1 },
-   { OPCODE_RSQ,    "RSQ",   1 },
-   { OPCODE_SCS,    "SCS",   1 },
-   { OPCODE_SEQ,    "SEQ",   2 },
-   { OPCODE_SFL,    "SFL",   0 },
-   { OPCODE_SGE,    "SGE",   2 },
-   { OPCODE_SGT,    "SGT",   2 },
-   { OPCODE_SIN,    "SIN",   1 },
-   { OPCODE_SLE,    "SLE",   2 },
-   { OPCODE_SLT,    "SLT",   2 },
-   { OPCODE_SNE,    "SNE",   2 },
-   { OPCODE_SSG,    "SSG",   1 },
-   { OPCODE_STR,    "STR",   0 },
-   { OPCODE_SUB,    "SUB",   2 },
-   { OPCODE_SWZ,    "SWZ",   1 },
-   { OPCODE_TEX,    "TEX",   1 },
-   { OPCODE_TXB,    "TXB",   1 },
-   { OPCODE_TXD,    "TXD",   3 },
-   { OPCODE_TXL,    "TXL",   1 },
-   { OPCODE_TXP,    "TXP",   1 },
-   { OPCODE_TXP_NV, "TXP",   1 },
-   { OPCODE_UP2H,   "UP2H",  1 },
-   { OPCODE_UP2US,  "UP2US", 1 },
-   { OPCODE_UP4B,   "UP4B",  1 },
-   { OPCODE_UP4UB,  "UP4UB", 1 },
-   { OPCODE_X2D,    "X2D",   3 },
-   { OPCODE_XPD,    "XPD",   2 }
+   { OPCODE_NOP,    "NOP",     0, 0 },
+   { OPCODE_ABS,    "ABS",     1, 1 },
+   { OPCODE_ADD,    "ADD",     2, 1 },
+   { OPCODE_ARA,    "ARA",     1, 1 },
+   { OPCODE_ARL,    "ARL",     1, 1 },
+   { OPCODE_ARL_NV, "ARL",     1, 1 },
+   { OPCODE_ARR,    "ARL",     1, 1 },
+   { OPCODE_BGNLOOP,"BGNLOOP", 0, 0 },
+   { OPCODE_BGNSUB, "BGNSUB",  0, 0 },
+   { OPCODE_BRA,    "BRA",     0, 0 },
+   { OPCODE_BRK,    "BRK",     0, 0 },
+   { OPCODE_CAL,    "CAL",     0, 0 },
+   { OPCODE_CMP,    "CMP",     3, 1 },
+   { OPCODE_CONT,   "CONT",    0, 0 },
+   { OPCODE_COS,    "COS",     1, 1 },
+   { OPCODE_DDX,    "DDX",     1, 1 },
+   { OPCODE_DDY,    "DDY",     1, 1 },
+   { OPCODE_DP3,    "DP3",     2, 1 },
+   { OPCODE_DP4,    "DP4",     2, 1 },
+   { OPCODE_DPH,    "DPH",     2, 1 },
+   { OPCODE_DST,    "DST",     2, 1 },
+   { OPCODE_ELSE,   "ELSE",    0, 0 },
+   { OPCODE_END,    "END",     0, 0 },
+   { OPCODE_ENDIF,  "ENDIF",   0, 0 },
+   { OPCODE_ENDLOOP,"ENDLOOP", 0, 0 },
+   { OPCODE_ENDSUB, "ENDSUB",  0, 0 },
+   { OPCODE_EX2,    "EX2",     1, 1 },
+   { OPCODE_EXP,    "EXP",     1, 1 },
+   { OPCODE_FLR,    "FLR",     1, 1 },
+   { OPCODE_FRC,    "FRC",     1, 1 },
+   { OPCODE_IF,     "IF",      1, 0 },
+   { OPCODE_INT,    "INT",     1, 1 },
+   { OPCODE_KIL,    "KIL",     1, 0 },
+   { OPCODE_KIL_NV, "KIL",     0, 0 },
+   { OPCODE_LG2,    "LG2",     1, 1 },
+   { OPCODE_LIT,    "LIT",     1, 1 },
+   { OPCODE_LOG,    "LOG",     1, 1 },
+   { OPCODE_LRP,    "LRP",     3, 1 },
+   { OPCODE_MAD,    "MAD",     3, 1 },
+   { OPCODE_MAX,    "MAX",     2, 1 },
+   { OPCODE_MIN,    "MIN",     2, 1 },
+   { OPCODE_MOV,    "MOV",     1, 1 },
+   { OPCODE_MUL,    "MUL",     2, 1 },
+   { OPCODE_NOISE1, "NOISE1",  1, 1 },
+   { OPCODE_NOISE2, "NOISE2",  1, 1 },
+   { OPCODE_NOISE3, "NOISE3",  1, 1 },
+   { OPCODE_NOISE4, "NOISE4",  1, 1 },
+   { OPCODE_PK2H,   "PK2H",    1, 1 },
+   { OPCODE_PK2US,  "PK2US",   1, 1 },
+   { OPCODE_PK4B,   "PK4B",    1, 1 },
+   { OPCODE_PK4UB,  "PK4UB",   1, 1 },
+   { OPCODE_POW,    "POW",     2, 1 },
+   { OPCODE_POPA,   "POPA",    0, 0 },
+   { OPCODE_PRINT,  "PRINT",   1, 0 },
+   { OPCODE_PUSHA,  "PUSHA",   0, 0 },
+   { OPCODE_RCC,    "RCC",     1, 1 },
+   { OPCODE_RCP,    "RCP",     1, 1 },
+   { OPCODE_RET,    "RET",     0, 0 },
+   { OPCODE_RFL,    "RFL",     1, 1 },
+   { OPCODE_RSQ,    "RSQ",     1, 1 },
+   { OPCODE_SCS,    "SCS",     1, 1 },
+   { OPCODE_SEQ,    "SEQ",     2, 1 },
+   { OPCODE_SFL,    "SFL",     0, 1 },
+   { OPCODE_SGE,    "SGE",     2, 1 },
+   { OPCODE_SGT,    "SGT",     2, 1 },
+   { OPCODE_SIN,    "SIN",     1, 1 },
+   { OPCODE_SLE,    "SLE",     2, 1 },
+   { OPCODE_SLT,    "SLT",     2, 1 },
+   { OPCODE_SNE,    "SNE",     2, 1 },
+   { OPCODE_SSG,    "SSG",     1, 1 },
+   { OPCODE_STR,    "STR",     0, 1 },
+   { OPCODE_SUB,    "SUB",     2, 1 },
+   { OPCODE_SWZ,    "SWZ",     1, 1 },
+   { OPCODE_TEX,    "TEX",     1, 1 },
+   { OPCODE_TXB,    "TXB",     1, 1 },
+   { OPCODE_TXD,    "TXD",     3, 1 },
+   { OPCODE_TXL,    "TXL",     1, 1 },
+   { OPCODE_TXP,    "TXP",     1, 1 },
+   { OPCODE_TXP_NV, "TXP",     1, 1 },
+   { OPCODE_UP2H,   "UP2H",    1, 1 },
+   { OPCODE_UP2US,  "UP2US",   1, 1 },
+   { OPCODE_UP4B,   "UP4B",    1, 1 },
+   { OPCODE_UP4UB,  "UP4UB",   1, 1 },
+   { OPCODE_X2D,    "X2D",     3, 1 },
+   { OPCODE_XPD,    "XPD",     2, 1 }
 };
 
 
@@ -234,6 +235,18 @@ _mesa_num_inst_src_regs(gl_inst_opcode opcode)
 
 
 /**
+ * Return the number of dst registers for the given instruction/opcode.
+ */
+GLuint
+_mesa_num_inst_dst_regs(gl_inst_opcode opcode)
+{
+   ASSERT(opcode == InstInfo[opcode].Opcode);
+   ASSERT(OPCODE_XPD == InstInfo[OPCODE_XPD].Opcode);
+   return InstInfo[opcode].NumDstRegs;
+}
+
+
+/**
  * Return string name for given program opcode.
  */
 const char *
diff --git a/src/mesa/shader/prog_instruction.h b/src/mesa/shader/prog_instruction.h
index c800757aa0f..643969b367e 100644
--- a/src/mesa/shader/prog_instruction.h
+++ b/src/mesa/shader/prog_instruction.h
@@ -440,6 +440,9 @@ _mesa_copy_instructions(struct prog_instruction *dest,
 extern GLuint
 _mesa_num_inst_src_regs(gl_inst_opcode opcode);
 
+extern GLuint
+_mesa_num_inst_dst_regs(gl_inst_opcode opcode);
+
 extern const char *
 _mesa_opcode_string(gl_inst_opcode opcode);
 
diff --git a/src/mesa/shader/shader_api.c b/src/mesa/shader/shader_api.c
index 1a931326afa..9f6c54dd4c5 100644
--- a/src/mesa/shader/shader_api.c
+++ b/src/mesa/shader/shader_api.c
@@ -332,7 +332,7 @@ _mesa_init_shader_state(GLcontext * ctx)
     * are generated by the GLSL compiler.
     */
    ctx->Shader.EmitHighLevelInstructions = GL_TRUE;
-   ctx->Shader.EmitCondCodes = GL_TRUE; /* XXX probably want GL_FALSE... */
+   ctx->Shader.EmitCondCodes = GL_FALSE;/*GL_TRUE;*/ /* XXX probably want GL_FALSE... */
    ctx->Shader.EmitComments = GL_FALSE;
 }