From 7ff0df6c2bf11a36bc6101e361484bde57595a79 Mon Sep 17 00:00:00 2001
From: Zack Rusin <zack@tungstengraphics.com>
Date: Wed, 31 Oct 2007 06:51:19 -0400
Subject: Renaming llvmtgsi to gallivm. Taking first steps on the way to
 supporting fragment shaders through llvm.

---
 src/mesa/pipe/softpipe/sp_quad_fs.c  | 70 ++++++++++++++++++++++++++++++++++++
 src/mesa/pipe/softpipe/sp_state.h    |  7 ++++
 src/mesa/pipe/softpipe/sp_state_fs.c | 12 +++++++
 3 files changed, 89 insertions(+)

(limited to 'src/mesa/pipe/softpipe')

diff --git a/src/mesa/pipe/softpipe/sp_quad_fs.c b/src/mesa/pipe/softpipe/sp_quad_fs.c
index d6d7eb6489..4bc604d682 100644
--- a/src/mesa/pipe/softpipe/sp_quad_fs.c
+++ b/src/mesa/pipe/softpipe/sp_quad_fs.c
@@ -156,6 +156,76 @@ shade_quad(
    }
 }
 
+#if 0
+static void
+shade_quad_llvm(struct quad_stage *qs,
+                struct quad_header *quad)
+{
+   struct quad_shade_stage *qss = quad_shade_stage(qs);
+   struct softpipe_context *softpipe = qs->softpipe;
+   const float fx = (float) quad->x0;
+   const float fy = (float) quad->y0;
+
+   /* Consts does not require 16 byte alignment. */
+   machine->Consts = softpipe->mapped_constants[PIPE_SHADER_FRAGMENT];
+
+   machine->SamplerUnits = softpipe->sampler_units;
+   machine->InterpCoefs = quad->coef;
+
+   machine->Inputs[0].xyzw[0].f[0] = fx;
+   machine->Inputs[0].xyzw[0].f[1] = fx + 1.0f;
+   machine->Inputs[0].xyzw[0].f[2] = fx;
+   machine->Inputs[0].xyzw[0].f[3] = fx + 1.0f;
+
+   machine->Inputs[0].xyzw[1].f[0] = fy;
+   machine->Inputs[0].xyzw[1].f[1] = fy;
+   machine->Inputs[0].xyzw[1].f[2] = fy + 1.0f;
+   machine->Inputs[0].xyzw[1].f[3] = fy + 1.0f;
+
+   /* run shader */
+#if defined(__i386__) || defined(__386__)
+         machine->Inputs,
+         machine->Outputs,
+         machine->Consts,
+         machine->Temps,
+         machine->InterpCoefs );
+      quad->mask &= ~(machine->Temps[TGSI_EXEC_TEMP_KILMASK_I].xyzw[TGSI_EXEC_TEMP_KILMASK_C].u[0]);
+#endif
+   ga_llvm_prog_exec(softpipe->fs->llvm_prog);
+
+   /* store result color */
+   if (qss->colorOutSlot >= 0) {
+      /* XXX need to handle multiple color outputs someday */
+      assert(qss->stage.softpipe->fs->shader.output_semantic_name[qss->colorOutSlot]
+             == TGSI_SEMANTIC_COLOR);
+      memcpy(
+             quad->outputs.color,
+             &machine->Outputs[qss->colorOutSlot].xyzw[0].f[0],
+             sizeof( quad->outputs.color ) );
+   }
+
+   /* store result Z */
+   if (qss->depthOutSlot >= 0) {
+      /* output[slot] is new Z */
+      uint i;
+      for (i = 0; i < 4; i++) {
+         quad->outputs.depth[i] = machine->Outputs[0].xyzw[2].f[i];
+      }
+   }
+   else {
+      /* copy input Z (which was interpolated by the executor) to output Z */
+      uint i;
+      for (i = 0; i < 4; i++) {
+         quad->outputs.depth[i] = machine->Inputs[0].xyzw[2].f[i];
+      }
+   }
+
+   /* shader may cull fragments */
+   if( quad->mask ) {
+      qs->next->run( qs->next, quad );
+   }
+}
+#endif
 
 /**
  * Per-primitive (or per-begin?) setup
diff --git a/src/mesa/pipe/softpipe/sp_state.h b/src/mesa/pipe/softpipe/sp_state.h
index 676ad06bfc..2f096a9cc9 100644
--- a/src/mesa/pipe/softpipe/sp_state.h
+++ b/src/mesa/pipe/softpipe/sp_state.h
@@ -35,6 +35,10 @@
 
 #include "x86/rtasm/x86sse.h"
 
+#ifdef MESA_LLVM
+struct gallivm_prog;
+#endif
+
 /**
  * Softpipe fs state is derived from pipe_shader_state.
  */
@@ -43,6 +47,9 @@ struct sp_fragment_shader_state {
 #if defined(__i386__) || defined(__386__)
    struct x86_function        sse2_program;
 #endif
+#ifdef MESA_LLVM
+   struct gallivm_prog *llvm_prog;
+#endif
 };
 
 void *
diff --git a/src/mesa/pipe/softpipe/sp_state_fs.c b/src/mesa/pipe/softpipe/sp_state_fs.c
index 351c2954f5..92b775ae51 100644
--- a/src/mesa/pipe/softpipe/sp_state_fs.c
+++ b/src/mesa/pipe/softpipe/sp_state_fs.c
@@ -33,6 +33,7 @@
 #include "pipe/p_winsys.h"
 #include "pipe/draw/draw_context.h"
 #include "pipe/tgsi/exec/tgsi_core.h"
+#include "pipe/llvm/gallivm.h"
 
 
 void * softpipe_create_fs_state(struct pipe_context *pipe,
@@ -60,6 +61,17 @@ void * softpipe_create_fs_state(struct pipe_context *pipe,
    }
 #endif
 
+#ifdef MESA_LLVM
+   fprintf(stderr, "+++++++++++++++++++++++++++++++++++++++++++++++++\n");
+   state->llvm_prog = gallivm_from_tgsi(state->shader.tokens);
+   if (!gallivm_global_cpu_engine()) {
+      gallivm_cpu_engine_create(state->llvm_prog);
+   }
+   else
+      gallivm_cpu_jit_compile(gallivm_global_cpu_engine(), state->llvm_prog);
+   fprintf(stderr, "+++++++++++++++++++++++++++++++++++++++++++++++++\n");
+#endif
+
    return state;
 }
 
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