#include "main/macros.h"
#include "main/enums.h"
-#include "shader/program.h"
+#include "program/program.h"
#include "intel_batchbuffer.h"
#include "brw_defines.h"
#include "brw_context.h"
#include "brw_eu.h"
-#include "brw_util.h"
#include "brw_gs.h"
static void brw_gs_alloc_regs( struct brw_gs_compile *c,
i += c->nr_regs;
}
+ c->reg.header = retype(brw_vec8_grf(i++, 0), BRW_REGISTER_TYPE_UD);
+ c->reg.temp = retype(brw_vec8_grf(i++, 0), BRW_REGISTER_TYPE_UD);
+
c->prog_data.urb_read_length = c->nr_regs;
c->prog_data.total_grf = i;
}
+/**
+ * Set up the initial value of c->reg.header register based on c->reg.R0.
+ *
+ * The following information is passed to the GS thread in R0, and needs to be
+ * included in the first URB_WRITE or FF_SYNC message sent by the GS:
+ *
+ * - DWORD 0 [31:0] handle info (Gen4 only)
+ * - DWORD 5 [7:0] FFTID
+ * - DWORD 6 [31:0] Debug info
+ * - DWORD 7 [31:0] Debug info
+ *
+ * This function sets up the above data by copying by copying the contents of
+ * R0 to the header register.
+ */
+static void brw_gs_initialize_header(struct brw_gs_compile *c)
+{
+ struct brw_compile *p = &c->func;
+ brw_MOV(p, c->reg.header, c->reg.R0);
+}
+
+/**
+ * Overwrite DWORD 2 of c->reg.header with the given immediate unsigned value.
+ *
+ * In URB_WRITE messages, DWORD 2 contains the fields PrimType, PrimStart,
+ * PrimEnd, Increment CL_INVOCATIONS, and SONumPrimsWritten, many of which we
+ * need to be able to update on a per-vertex basis.
+ */
+static void brw_gs_overwrite_header_dw2(struct brw_gs_compile *c,
+ unsigned dw2)
+{
+ struct brw_compile *p = &c->func;
+ brw_MOV(p, get_element_ud(c->reg.header, 2), brw_imm_ud(dw2));
+}
+
+/**
+ * Overwrite DWORD 2 of c->reg.header with the primitive type from c->reg.R0.
+ *
+ * When the thread is spawned, GRF 0 contains the primitive type in bits 4:0
+ * of DWORD 2. URB_WRITE messages need the primitive type in bits 6:2 of
+ * DWORD 2. So this function extracts the primitive type field, bitshifts it
+ * appropriately, and stores it in c->reg.header.
+ */
+static void brw_gs_overwrite_header_dw2_from_r0(struct brw_gs_compile *c)
+{
+ struct brw_compile *p = &c->func;
+ brw_AND(p, get_element_ud(c->reg.header, 2), get_element_ud(c->reg.R0, 2),
+ brw_imm_ud(0x1f));
+ brw_SHL(p, get_element_ud(c->reg.header, 2),
+ get_element_ud(c->reg.header, 2), brw_imm_ud(2));
+}
+
+/**
+ * Apply an additive offset to DWORD 2 of c->reg.header.
+ *
+ * This is used to set/unset the "PrimStart" and "PrimEnd" flags appropriately
+ * for each vertex.
+ */
+static void brw_gs_offset_header_dw2(struct brw_gs_compile *c, int offset)
+{
+ struct brw_compile *p = &c->func;
+ brw_ADD(p, get_element_d(c->reg.header, 2), get_element_d(c->reg.header, 2),
+ brw_imm_d(offset));
+}
+
+
+/**
+ * Emit a vertex using the URB_WRITE message. Use the contents of
+ * c->reg.header for the message header, and the registers starting at \c vert
+ * for the vertex data.
+ *
+ * If \c last is true, then this is the last vertex, so no further URB space
+ * should be allocated, and this message should end the thread.
+ *
+ * If \c last is false, then a new URB entry will be allocated, and its handle
+ * will be stored in DWORD 0 of c->reg.header for use in the next URB_WRITE
+ * message.
+ */
static void brw_gs_emit_vue(struct brw_gs_compile *c,
struct brw_reg vert,
- GLboolean last,
- GLuint header)
+ bool last)
{
struct brw_compile *p = &c->func;
- GLboolean 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));
+ bool allocate = !last;
/* Copy the vertex from vertn into m1..mN+1:
*/
* allocated each time.
*/
brw_urb_WRITE(p,
- allocate ? c->reg.R0 : retype(brw_null_reg(), BRW_REGISTER_TYPE_UD),
+ allocate ? c->reg.temp
+ : retype(brw_null_reg(), BRW_REGISTER_TYPE_UD),
0,
- c->reg.R0,
+ c->reg.header,
allocate,
1, /* used */
c->nr_regs + 1, /* msg length */
1, /* writes_complete */
0, /* urb offset */
BRW_URB_SWIZZLE_NONE);
+
+ if (allocate) {
+ brw_MOV(p, get_element_ud(c->reg.header, 0),
+ get_element_ud(c->reg.temp, 0));
+ }
}
+/**
+ * Send an FF_SYNC message to ensure that all previously spawned GS threads
+ * have finished sending primitives down the pipeline, and to allocate a URB
+ * entry for the first output vertex. Only needed when intel->needs_ff_sync
+ * is true.
+ *
+ * This function modifies c->reg.header: in DWORD 1, it stores num_prim (which
+ * is needed by the FF_SYNC message), and in DWORD 0, it stores the handle to
+ * the allocated URB entry (which will be needed by the URB_WRITE meesage that
+ * follows).
+ */
+static void brw_gs_ff_sync(struct brw_gs_compile *c, int num_prim)
+{
+ struct brw_compile *p = &c->func;
+
+ brw_MOV(p, get_element_ud(c->reg.header, 1), brw_imm_ud(num_prim));
+ brw_ff_sync(p,
+ c->reg.temp,
+ 0,
+ c->reg.header,
+ 1, /* allocate */
+ 1, /* response length */
+ 0 /* eot */);
+ brw_MOV(p, get_element_ud(c->reg.header, 0),
+ get_element_ud(c->reg.temp, 0));
+}
-void brw_gs_quads( struct brw_gs_compile *c )
+void brw_gs_quads( struct brw_gs_compile *c, struct brw_gs_prog_key *key )
{
+ struct intel_context *intel = &c->func.brw->intel;
+
brw_gs_alloc_regs(c, 4);
-
+ brw_gs_initialize_header(c);
/* 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));
+ if (intel->needs_ff_sync)
+ brw_gs_ff_sync(c, 1);
+ brw_gs_overwrite_header_dw2(
+ c, ((_3DPRIM_POLYGON << URB_WRITE_PRIM_TYPE_SHIFT)
+ | URB_WRITE_PRIM_START));
+ if (key->pv_first) {
+ brw_gs_emit_vue(c, c->reg.vertex[0], 0);
+ brw_gs_overwrite_header_dw2(
+ c, _3DPRIM_POLYGON << URB_WRITE_PRIM_TYPE_SHIFT);
+ brw_gs_emit_vue(c, c->reg.vertex[1], 0);
+ brw_gs_emit_vue(c, c->reg.vertex[2], 0);
+ brw_gs_overwrite_header_dw2(
+ c, ((_3DPRIM_POLYGON << URB_WRITE_PRIM_TYPE_SHIFT)
+ | URB_WRITE_PRIM_END));
+ brw_gs_emit_vue(c, c->reg.vertex[3], 1);
+ }
+ else {
+ brw_gs_emit_vue(c, c->reg.vertex[3], 0);
+ brw_gs_overwrite_header_dw2(
+ c, _3DPRIM_POLYGON << URB_WRITE_PRIM_TYPE_SHIFT);
+ brw_gs_emit_vue(c, c->reg.vertex[0], 0);
+ brw_gs_emit_vue(c, c->reg.vertex[1], 0);
+ brw_gs_overwrite_header_dw2(
+ c, ((_3DPRIM_POLYGON << URB_WRITE_PRIM_TYPE_SHIFT)
+ | URB_WRITE_PRIM_END));
+ brw_gs_emit_vue(c, c->reg.vertex[2], 1);
+ }
}
-void brw_gs_quad_strip( struct brw_gs_compile *c )
+void brw_gs_quad_strip( struct brw_gs_compile *c, struct brw_gs_prog_key *key )
{
+ struct intel_context *intel = &c->func.brw->intel;
+
brw_gs_alloc_regs(c, 4);
+ brw_gs_initialize_header(c);
- 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_tris( struct brw_gs_compile *c )
-{
- 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));
+ if (intel->needs_ff_sync)
+ brw_gs_ff_sync(c, 1);
+ brw_gs_overwrite_header_dw2(
+ c, ((_3DPRIM_POLYGON << URB_WRITE_PRIM_TYPE_SHIFT)
+ | URB_WRITE_PRIM_START));
+ if (key->pv_first) {
+ brw_gs_emit_vue(c, c->reg.vertex[0], 0);
+ brw_gs_overwrite_header_dw2(
+ c, _3DPRIM_POLYGON << URB_WRITE_PRIM_TYPE_SHIFT);
+ brw_gs_emit_vue(c, c->reg.vertex[1], 0);
+ brw_gs_emit_vue(c, c->reg.vertex[2], 0);
+ brw_gs_overwrite_header_dw2(
+ c, ((_3DPRIM_POLYGON << URB_WRITE_PRIM_TYPE_SHIFT)
+ | URB_WRITE_PRIM_END));
+ brw_gs_emit_vue(c, c->reg.vertex[3], 1);
+ }
+ else {
+ brw_gs_emit_vue(c, c->reg.vertex[2], 0);
+ brw_gs_overwrite_header_dw2(
+ c, _3DPRIM_POLYGON << URB_WRITE_PRIM_TYPE_SHIFT);
+ brw_gs_emit_vue(c, c->reg.vertex[3], 0);
+ brw_gs_emit_vue(c, c->reg.vertex[0], 0);
+ brw_gs_overwrite_header_dw2(
+ c, ((_3DPRIM_POLYGON << URB_WRITE_PRIM_TYPE_SHIFT)
+ | URB_WRITE_PRIM_END));
+ brw_gs_emit_vue(c, c->reg.vertex[1], 1);
+ }
}
void brw_gs_lines( struct brw_gs_compile *c )
{
+ struct intel_context *intel = &c->func.brw->intel;
+
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));
-}
+ brw_gs_initialize_header(c);
-void brw_gs_points( struct brw_gs_compile *c )
-{
- 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));
+ if (intel->needs_ff_sync)
+ brw_gs_ff_sync(c, 1);
+ brw_gs_overwrite_header_dw2(
+ c, ((_3DPRIM_LINESTRIP << URB_WRITE_PRIM_TYPE_SHIFT)
+ | URB_WRITE_PRIM_START));
+ brw_gs_emit_vue(c, c->reg.vertex[0], 0);
+ brw_gs_overwrite_header_dw2(
+ c, ((_3DPRIM_LINESTRIP << URB_WRITE_PRIM_TYPE_SHIFT)
+ | URB_WRITE_PRIM_END));
+ brw_gs_emit_vue(c, c->reg.vertex[1], 1);
}
+/**
+ * Generate the geometry shader program used on Gen6 to perform stream output
+ * (transform feedback).
+ */
+void
+gen6_sol_program(struct brw_gs_compile *c, struct brw_gs_prog_key *key,
+ unsigned num_verts, bool check_edge_flags)
+{
+ struct brw_compile *p = &c->func;
+ brw_gs_alloc_regs(c, num_verts);
+ brw_gs_initialize_header(c);
+ brw_gs_ff_sync(c, 1);
-
-
-
-
+ brw_gs_overwrite_header_dw2_from_r0(c);
+ switch (num_verts) {
+ case 1:
+ brw_gs_offset_header_dw2(c, URB_WRITE_PRIM_START | URB_WRITE_PRIM_END);
+ brw_gs_emit_vue(c, c->reg.vertex[0], true);
+ break;
+ case 2:
+ brw_gs_offset_header_dw2(c, URB_WRITE_PRIM_START);
+ brw_gs_emit_vue(c, c->reg.vertex[0], false);
+ brw_gs_offset_header_dw2(c, URB_WRITE_PRIM_END - URB_WRITE_PRIM_START);
+ brw_gs_emit_vue(c, c->reg.vertex[1], true);
+ break;
+ case 3:
+ if (check_edge_flags) {
+ /* Only emit vertices 0 and 1 if this is the first triangle of the
+ * polygon. Otherwise they are redundant.
+ */
+ brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ);
+ brw_AND(p, retype(brw_null_reg(), BRW_REGISTER_TYPE_UD),
+ get_element_ud(c->reg.R0, 2),
+ brw_imm_ud(BRW_GS_EDGE_INDICATOR_0));
+ brw_IF(p, BRW_EXECUTE_1);
+ }
+ brw_gs_offset_header_dw2(c, URB_WRITE_PRIM_START);
+ brw_gs_emit_vue(c, c->reg.vertex[0], false);
+ brw_gs_offset_header_dw2(c, -URB_WRITE_PRIM_START);
+ brw_gs_emit_vue(c, c->reg.vertex[1], false);
+ if (check_edge_flags) {
+ brw_ENDIF(p);
+ /* Only emit vertex 2 in PRIM_END mode if this is the last triangle
+ * of the polygon. Otherwise leave the primitive incomplete because
+ * there are more polygon vertices coming.
+ */
+ brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ);
+ brw_AND(p, retype(brw_null_reg(), BRW_REGISTER_TYPE_UD),
+ get_element_ud(c->reg.R0, 2),
+ brw_imm_ud(BRW_GS_EDGE_INDICATOR_1));
+ brw_set_predicate_control(p, BRW_PREDICATE_NORMAL);
+ }
+ brw_gs_offset_header_dw2(c, URB_WRITE_PRIM_END);
+ brw_set_predicate_control(p, BRW_PREDICATE_NONE);
+ brw_gs_emit_vue(c, c->reg.vertex[2], true);
+ break;
+ }
+}
projects / mesa.git / blobdiff