From 526430ade1d7ec0e1b3743d69e1ee9fb89cbaa2a Mon Sep 17 00:00:00 2001 From: Nicolai Hähnle Date: Mon, 21 Sep 2009 12:50:33 +0200 Subject: r300: Zero-initialize register for NV_vertex_program MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Nicolai Hähnle --- src/mesa/drivers/dri/r300/r300_vertprog.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'src/mesa/drivers/dri/r300/r300_vertprog.c') diff --git a/src/mesa/drivers/dri/r300/r300_vertprog.c b/src/mesa/drivers/dri/r300/r300_vertprog.c index dd0f27f9cba..0cb7dde985b 100644 --- a/src/mesa/drivers/dri/r300/r300_vertprog.c +++ b/src/mesa/drivers/dri/r300/r300_vertprog.c @@ -203,6 +203,34 @@ static void t_inputs_outputs(struct r300_vertex_program_compiler * c) } } +/** + * The NV_vertex_program spec mandates that all registers be + * initialized to zero. We do this here unconditionally. + * + * \note We rely on dead-code elimination in the compiler. + */ +static void initialize_NV_registers(struct radeon_compiler * compiler) +{ + unsigned int reg; + struct rc_instruction * inst; + + for(reg = 0; reg < 12; ++reg) { + inst = rc_insert_new_instruction(compiler, &compiler->Program.Instructions); + inst->I.Opcode = OPCODE_MOV; + inst->I.DstReg.File = PROGRAM_TEMPORARY; + inst->I.DstReg.Index = reg; + inst->I.SrcReg[0].File = PROGRAM_BUILTIN; + inst->I.SrcReg[0].Swizzle = SWIZZLE_0000; + } + + inst = rc_insert_new_instruction(compiler, &compiler->Program.Instructions); + inst->I.Opcode = OPCODE_ARL; + inst->I.DstReg.File = PROGRAM_ADDRESS; + inst->I.DstReg.Index = 0; + inst->I.DstReg.WriteMask = WRITEMASK_X; + inst->I.SrcReg[0].File = PROGRAM_BUILTIN; + inst->I.SrcReg[0].Swizzle = SWIZZLE_0000; +} static struct r300_vertex_program *build_program(GLcontext *ctx, struct r300_vertex_program_key *wanted_key, @@ -234,6 +262,9 @@ static struct r300_vertex_program *build_program(GLcontext *ctx, rc_mesa_to_rc_program(&compiler.Base, &vp->Base->Base); + if (mesa_vp->IsNVProgram) + initialize_NV_registers(&compiler.Base); + rc_move_output(&compiler.Base, VERT_RESULT_PSIZ, VERT_RESULT_PSIZ, WRITEMASK_X); if (vp->key.WPosAttr != FRAG_ATTRIB_MAX) { -- cgit v1.2.3