From 726a04a2cd1bf159a6c40584b4b2b9bc5948a82e Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Thu, 24 Sep 2009 11:58:33 -0700
Subject: i965: Emit zero initialization for NV VP temporaries as required.
This is similar to what r300 does inside the driver, but I've added it as
a generic option since it seems most hardware will want it.
Fixes piglit nv-init-zero-reg.vpfp and nv-init-zero-addr.vpfp.
---
src/mesa/drivers/dri/i965/brw_context.c | 1 +
src/mesa/main/mtypes.h | 1 +
src/mesa/shader/nvprogram.c | 44 +++++++++++++++++++++++++++++++++
src/mesa/shader/nvprogram.h | 4 +++
src/mesa/shader/nvvertparse.c | 1 +
5 files changed, 51 insertions(+)
(limited to 'src')
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 3c5b848319..c300c33adc 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -125,6 +125,7 @@ GLboolean brwCreateContext( const __GLcontextModes *mesaVis,
/* We want the GLSL compiler to emit code that uses condition codes */
ctx->Shader.EmitCondCodes = GL_TRUE;
+ ctx->Shader.EmitNVTempInitialization = GL_TRUE;
ctx->Const.VertexProgram.MaxNativeInstructions = (16 * 1024);
ctx->Const.VertexProgram.MaxAluInstructions = 0;
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 6b64bf8139..f8e4e41583 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2079,6 +2079,7 @@ struct gl_shader_state
GLboolean EmitContReturn; /**< Emit CONT/RET opcodes? */
GLboolean EmitCondCodes; /**< Use condition codes? */
GLboolean EmitComments; /**< Annotated instructions */
+ GLboolean EmitNVTempInitialization; /**< 0-fill NV temp registers */
void *MemPool;
GLbitfield Flags; /**< Mask of GLSL_x flags */
struct gl_sl_pragmas DefaultPragmas; /**< Default #pragma settings */
diff --git a/src/mesa/shader/nvprogram.c b/src/mesa/shader/nvprogram.c
index fdb2f4210a..471a7358a2 100644
--- a/src/mesa/shader/nvprogram.c
+++ b/src/mesa/shader/nvprogram.c
@@ -509,7 +509,51 @@ _mesa_GetVertexAttribPointervNV(GLuint index, GLenum pname, GLvoid **pointer)
*pointer = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[index].Ptr;
}
+void
+_mesa_emit_nv_temp_initialization(GLcontext *ctx,
+ struct gl_program *program)
+{
+ struct prog_instruction *inst;
+ int i;
+
+ if (!ctx->Shader.EmitNVTempInitialization)
+ return;
+ /* We'll swizzle up a zero temporary so we can use it for the
+ * ARL.
+ */
+ if (program->NumTemporaries == 0)
+ program->NumTemporaries = 1;
+
+ _mesa_insert_instructions(program, 0, program->NumTemporaries + 1);
+
+ for (i = 0; i < program->NumTemporaries; i++) {
+ struct prog_instruction *inst = &program->Instructions[i];
+
+ inst->Opcode = OPCODE_SWZ;
+ inst->DstReg.File = PROGRAM_TEMPORARY;
+ inst->DstReg.Index = i;
+ inst->DstReg.WriteMask = WRITEMASK_XYZW;
+ inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+ inst->SrcReg[0].Index = 0;
+ inst->SrcReg[0].Swizzle = MAKE_SWIZZLE4(SWIZZLE_ZERO,
+ SWIZZLE_ZERO,
+ SWIZZLE_ZERO,
+ SWIZZLE_ZERO);
+ }
+
+ inst = &program->Instructions[i];
+ inst->Opcode = OPCODE_ARL;
+ inst->DstReg.File = PROGRAM_ADDRESS;
+ inst->DstReg.Index = 0;
+ inst->DstReg.WriteMask = WRITEMASK_XYZW;
+ inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+ inst->SrcReg[0].Index = 0;
+ inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;
+
+ if (program->NumAddressRegs == 0)
+ program->NumAddressRegs = 1;
+}
void
_mesa_setup_nv_temporary_count(GLcontext *ctx, struct gl_program *program)
diff --git a/src/mesa/shader/nvprogram.h b/src/mesa/shader/nvprogram.h
index 0ed143d52f..8ee59661bd 100644
--- a/src/mesa/shader/nvprogram.h
+++ b/src/mesa/shader/nvprogram.h
@@ -106,4 +106,8 @@ _mesa_GetProgramNamedParameterdvNV(GLuint id, GLsizei len, const GLubyte *name,
extern void
_mesa_setup_nv_temporary_count(GLcontext *ctx, struct gl_program *program);
+extern void
+_mesa_emit_nv_temp_initialization(GLcontext *ctx,
+ struct gl_program *program);
+
#endif
diff --git a/src/mesa/shader/nvvertparse.c b/src/mesa/shader/nvvertparse.c
index a94e6b8b80..6ab8a14cb9 100644
--- a/src/mesa/shader/nvvertparse.c
+++ b/src/mesa/shader/nvvertparse.c
@@ -1423,6 +1423,7 @@ _mesa_parse_nv_vertex_program(GLcontext *ctx, GLenum dstTarget,
program->Base.NumParameters = program->Base.Parameters->NumParameters;
_mesa_setup_nv_temporary_count(ctx, &program->Base);
+ _mesa_emit_nv_temp_initialization(ctx, &program->Base);
}
else {
/* Error! */
--
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