brw_gs_emit.c File Reference

Include dependency graph for brw_gs_emit.c:

Go to the source code of this file.

Functions
static void	brw_gs_alloc_regs (struct brw_gs_compile *c, unsigned nr_verts)
static void	brw_gs_emit_vue (struct brw_gs_compile *c, struct brw_reg vert, boolean last, unsigned header)
void	brw_gs_quads (struct brw_gs_compile *c)
void	brw_gs_quad_strip (struct brw_gs_compile *c)
void	brw_gs_tris (struct brw_gs_compile *c)
void	brw_gs_lines (struct brw_gs_compile *c)
void	brw_gs_points (struct brw_gs_compile *c)

---

Function Documentation

static void brw_gs_alloc_regs	(	struct brw_gs_compile *	c,
		unsigned	nr_verts
	)			[static]

Definition at line 38 of file brw_gs_emit.c.

References BRW_REGISTER_TYPE_UD, brw_vec4_grf(), brw_vec8_grf(), brw_gs_compile::nr_regs, brw_gs_compile::prog_data, brw_gs_compile::R0, brw_gs_compile::reg, retype(), brw_gs_prog_data::total_grf, brw_gs_prog_data::urb_read_length, and brw_gs_compile::vertex.

{
   unsigned i = 0,j;

   /* Register usage is static, precompute here:
    */
   c->reg.R0 = retype(brw_vec8_grf(i, 0), BRW_REGISTER_TYPE_UD); i++;

   /* Payload vertices plus space for more generated vertices:
    */
   for (j = 0; j < nr_verts; j++) {
      c->reg.vertex[j] = brw_vec4_grf(i, 0);
      i += c->nr_regs;
   }

   c->prog_data.urb_read_length = c->nr_regs; 
   c->prog_data.total_grf = i;
}

static void brw_gs_emit_vue	(	struct brw_gs_compile *	c,
		struct brw_reg	vert,
		boolean	last,
		unsigned	header
	)			[static]

Definition at line 59 of file brw_gs_emit.c.

References brw_copy8(), brw_imm_ud(), brw_message_reg(), brw_MOV(), brw_null_reg(), BRW_REGISTER_TYPE_UD, BRW_URB_SWIZZLE_NONE, brw_urb_WRITE(), brw_gs_compile::func, get_element_ud(), brw_gs_compile::nr_regs, brw_gs_compile::R0, brw_gs_compile::reg, and retype().

{
   struct brw_compile *p = &c->func;
   boolean allocate = !last;

   /* Overwrite PrimType and PrimStart in the message header, for
    * each vertex in turn:
    */
   brw_MOV(p, get_element_ud(c->reg.R0, 2), brw_imm_ud(header));

   /* Copy the vertex from vertn into m1..mN+1:
    */
   brw_copy8(p, brw_message_reg(1), vert, c->nr_regs);

   /* Send each vertex as a seperate write to the urb.  This is
    * different to the concept in brw_sf_emit.c, where subsequent
    * writes are used to build up a single urb entry.  Each of these
    * writes instantiates a seperate urb entry, and a new one must be
    * allocated each time.
    */
   brw_urb_WRITE(p, 
                 allocate ? c->reg.R0 : retype(brw_null_reg(), BRW_REGISTER_TYPE_UD),
                 0,
                 c->reg.R0,
                 allocate,
                 1,             /* used */
                 c->nr_regs + 1, /* msg length */
                 allocate ? 1 : 0, /* response length */
                 allocate ? 0 : 1, /* eot */
                 1,             /* writes_complete */
                 0,             /* urb offset */
                 BRW_URB_SWIZZLE_NONE);
}

void brw_gs_lines

(

struct brw_gs_compile *

c

)

Definition at line 129 of file brw_gs_emit.c.

References _3DPRIM_LINESTRIP, brw_gs_alloc_regs(), brw_gs_emit_vue(), R02_PRIM_END, R02_PRIM_START, brw_gs_compile::reg, and brw_gs_compile::vertex.

{
   brw_gs_alloc_regs(c, 2);
   brw_gs_emit_vue(c, c->reg.vertex[0], 0, ((_3DPRIM_LINESTRIP << 2) | R02_PRIM_START));
   brw_gs_emit_vue(c, c->reg.vertex[1], 1, ((_3DPRIM_LINESTRIP << 2) | R02_PRIM_END));
}

void brw_gs_points

(

struct brw_gs_compile *

c

)

Definition at line 136 of file brw_gs_emit.c.

References _3DPRIM_POINTLIST, brw_gs_alloc_regs(), brw_gs_emit_vue(), R02_PRIM_END, R02_PRIM_START, brw_gs_compile::reg, and brw_gs_compile::vertex.

{
   brw_gs_alloc_regs(c, 1);
   brw_gs_emit_vue(c, c->reg.vertex[0], 1, ((_3DPRIM_POINTLIST << 2) | R02_PRIM_START | R02_PRIM_END));
}

void brw_gs_quad_strip

(

struct brw_gs_compile *

c

)

Definition at line 111 of file brw_gs_emit.c.

References _3DPRIM_POLYGON, brw_gs_alloc_regs(), brw_gs_emit_vue(), R02_PRIM_END, R02_PRIM_START, brw_gs_compile::reg, and brw_gs_compile::vertex.

{
   brw_gs_alloc_regs(c, 4);
   
   brw_gs_emit_vue(c, c->reg.vertex[2], 0, ((_3DPRIM_POLYGON << 2) | R02_PRIM_START));
   brw_gs_emit_vue(c, c->reg.vertex[3], 0, (_3DPRIM_POLYGON << 2));
   brw_gs_emit_vue(c, c->reg.vertex[0], 0, (_3DPRIM_POLYGON << 2)); 
   brw_gs_emit_vue(c, c->reg.vertex[1], 1, ((_3DPRIM_POLYGON << 2) | R02_PRIM_END));
}

void brw_gs_quads

(

struct brw_gs_compile *

c

)

Definition at line 98 of file brw_gs_emit.c.

References _3DPRIM_POLYGON, brw_gs_alloc_regs(), brw_gs_emit_vue(), R02_PRIM_END, R02_PRIM_START, brw_gs_compile::reg, and brw_gs_compile::vertex.

{
   brw_gs_alloc_regs(c, 4);
   
   /* Use polygons for correct edgeflag behaviour. Note that vertex 3
    * is the PV for quads, but vertex 0 for polygons:
    */
   brw_gs_emit_vue(c, c->reg.vertex[3], 0, ((_3DPRIM_POLYGON << 2) | R02_PRIM_START));
   brw_gs_emit_vue(c, c->reg.vertex[0], 0, (_3DPRIM_POLYGON << 2));
   brw_gs_emit_vue(c, c->reg.vertex[1], 0, (_3DPRIM_POLYGON << 2)); 
   brw_gs_emit_vue(c, c->reg.vertex[2], 1, ((_3DPRIM_POLYGON << 2) | R02_PRIM_END));
}

void brw_gs_tris

(

struct brw_gs_compile *

c

)

Definition at line 121 of file brw_gs_emit.c.

References _3DPRIM_TRILIST, brw_gs_alloc_regs(), brw_gs_emit_vue(), R02_PRIM_END, R02_PRIM_START, brw_gs_compile::reg, and brw_gs_compile::vertex.

{
   brw_gs_alloc_regs(c, 3);
   brw_gs_emit_vue(c, c->reg.vertex[0], 0, ((_3DPRIM_TRILIST << 2) | R02_PRIM_START));
   brw_gs_emit_vue(c, c->reg.vertex[1], 0, (_3DPRIM_TRILIST << 2));
   brw_gs_emit_vue(c, c->reg.vertex[2], 1, ((_3DPRIM_TRILIST << 2) | R02_PRIM_END));
}

---