+++ /dev/null
-/*
- Copyright (C) Intel Corp. 2006. All Rights Reserved.
- Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
- develop this 3D driver.
-
- Permission is hereby granted, free of charge, to any person obtaining
- a copy of this software and associated documentation files (the
- "Software"), to deal in the Software without restriction, including
- without limitation the rights to use, copy, modify, merge, publish,
- distribute, sublicense, and/or sell copies of the Software, and to
- permit persons to whom the Software is furnished to do so, subject to
- the following conditions:
-
- The above copyright notice and this permission notice (including the
- next paragraph) shall be included in all copies or substantial
- portions of the Software.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
- LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
- **********************************************************************/
- /*
- * Authors:
- * Keith Whitwell <keith@tungstengraphics.com>
- */
-
-
-#include "brw_defines.h"
-#include "brw_context.h"
-#include "brw_eu.h"
-#include "brw_util.h"
-#include "brw_sf.h"
-
-
-
-/***********************************************************************
- * Triangle setup.
- */
-
-
-static void alloc_regs( struct brw_sf_compile *c )
-{
- unsigned reg, i;
-
- /* Values computed by fixed function unit:
- */
- c->pv = retype(brw_vec1_grf(1, 1), BRW_REGISTER_TYPE_UD);
- c->det = brw_vec1_grf(1, 2);
- c->dx0 = brw_vec1_grf(1, 3);
- c->dx2 = brw_vec1_grf(1, 4);
- c->dy0 = brw_vec1_grf(1, 5);
- c->dy2 = brw_vec1_grf(1, 6);
-
- /* z and 1/w passed in seperately:
- */
- c->z[0] = brw_vec1_grf(2, 0);
- c->inv_w[0] = brw_vec1_grf(2, 1);
- c->z[1] = brw_vec1_grf(2, 2);
- c->inv_w[1] = brw_vec1_grf(2, 3);
- c->z[2] = brw_vec1_grf(2, 4);
- c->inv_w[2] = brw_vec1_grf(2, 5);
-
- /* The vertices:
- */
- reg = 3;
- for (i = 0; i < c->nr_verts; i++) {
- c->vert[i] = brw_vec8_grf(reg, 0);
- reg += c->nr_attr_regs;
- }
-
- /* Temporaries, allocated after last vertex reg.
- */
- c->inv_det = brw_vec1_grf(reg, 0); reg++;
- c->a1_sub_a0 = brw_vec8_grf(reg, 0); reg++;
- c->a2_sub_a0 = brw_vec8_grf(reg, 0); reg++;
- c->tmp = brw_vec8_grf(reg, 0); reg++;
-
- /* Note grf allocation:
- */
- c->prog_data.total_grf = reg;
-
-
- /* Outputs of this program - interpolation coefficients for
- * rasterization:
- */
- c->m1Cx = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 1, 0);
- c->m2Cy = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 2, 0);
- c->m3C0 = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 3, 0);
-}
-
-
-static void copy_z_inv_w( struct brw_sf_compile *c )
-{
- struct brw_compile *p = &c->func;
- unsigned i;
-
- brw_push_insn_state(p);
-
- /* Copy both scalars with a single MOV:
- */
- for (i = 0; i < c->nr_verts; i++)
- brw_MOV(p, vec2(suboffset(c->vert[i], 2)), vec2(c->z[i]));
-
- brw_pop_insn_state(p);
-}
-
-
-static void invert_det( struct brw_sf_compile *c)
-{
- brw_math(&c->func,
- c->inv_det,
- BRW_MATH_FUNCTION_INV,
- BRW_MATH_SATURATE_NONE,
- 0,
- c->det,
- BRW_MATH_DATA_SCALAR,
- BRW_MATH_PRECISION_FULL);
-
-}
-
-#define NON_PERPECTIVE_ATTRS (FRAG_BIT_WPOS | \
- FRAG_BIT_COL0 | \
- FRAG_BIT_COL1)
-
-static boolean calculate_masks( struct brw_sf_compile *c,
- unsigned reg,
- ushort *pc,
- ushort *pc_persp,
- ushort *pc_linear)
-{
- boolean is_last_attr = (reg == c->nr_setup_regs - 1);
- unsigned persp_mask = c->key.persp_mask;
- unsigned linear_mask = c->key.linear_mask;
-
- debug_printf("persp_mask: %x\n", persp_mask);
- debug_printf("linear_mask: %x\n", linear_mask);
-
- *pc_persp = 0;
- *pc_linear = 0;
- *pc = 0xf;
-
- if (persp_mask & (1 << (reg*2)))
- *pc_persp = 0xf;
-
- if (linear_mask & (1 << (reg*2)))
- *pc_linear = 0xf;
-
- /* Maybe only processs one attribute on the final round:
- */
- if (reg*2+1 < c->nr_setup_attrs) {
- *pc |= 0xf0;
-
- if (persp_mask & (1 << (reg*2+1)))
- *pc_persp |= 0xf0;
-
- if (linear_mask & (1 << (reg*2+1)))
- *pc_linear |= 0xf0;
- }
-
- debug_printf("pc: %x\n", *pc);
- debug_printf("pc_persp: %x\n", *pc_persp);
- debug_printf("pc_linear: %x\n", *pc_linear);
-
-
- return is_last_attr;
-}
-
-
-
-void brw_emit_tri_setup( struct brw_sf_compile *c )
-{
- struct brw_compile *p = &c->func;
- unsigned i;
-
- debug_printf("%s START ==============\n", __FUNCTION__);
-
- c->nr_verts = 3;
- alloc_regs(c);
- invert_det(c);
- copy_z_inv_w(c);
-
-
- for (i = 0; i < c->nr_setup_regs; i++)
- {
- /* Pair of incoming attributes:
- */
- struct brw_reg a0 = offset(c->vert[0], i);
- struct brw_reg a1 = offset(c->vert[1], i);
- struct brw_reg a2 = offset(c->vert[2], i);
- ushort pc = 0, pc_persp = 0, pc_linear = 0;
- boolean last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
-
- if (pc_persp)
- {
- brw_set_predicate_control_flag_value(p, pc_persp);
- brw_MUL(p, a0, a0, c->inv_w[0]);
- brw_MUL(p, a1, a1, c->inv_w[1]);
- brw_MUL(p, a2, a2, c->inv_w[2]);
- }
-
-
- /* Calculate coefficients for interpolated values:
- */
- if (pc_linear)
- {
- brw_set_predicate_control_flag_value(p, pc_linear);
-
- brw_ADD(p, c->a1_sub_a0, a1, negate(a0));
- brw_ADD(p, c->a2_sub_a0, a2, negate(a0));
-
- /* calculate dA/dx
- */
- brw_MUL(p, brw_null_reg(), c->a1_sub_a0, c->dy2);
- brw_MAC(p, c->tmp, c->a2_sub_a0, negate(c->dy0));
- brw_MUL(p, c->m1Cx, c->tmp, c->inv_det);
-
- /* calculate dA/dy
- */
- brw_MUL(p, brw_null_reg(), c->a2_sub_a0, c->dx0);
- brw_MAC(p, c->tmp, c->a1_sub_a0, negate(c->dx2));
- brw_MUL(p, c->m2Cy, c->tmp, c->inv_det);
- }
-
- {
- brw_set_predicate_control_flag_value(p, pc);
- /* start point for interpolation
- */
- brw_MOV(p, c->m3C0, a0);
-
- /* Copy m0..m3 to URB. m0 is implicitly copied from r0 in
- * the send instruction:
- */
- brw_urb_WRITE(p,
- brw_null_reg(),
- 0,
- brw_vec8_grf(0, 0), /* r0, will be copied to m0 */
- 0, /* allocate */
- 1, /* used */
- 4, /* msg len */
- 0, /* response len */
- last, /* eot */
- last, /* writes complete */
- i*4, /* offset */
- BRW_URB_SWIZZLE_TRANSPOSE); /* XXX: Swizzle control "SF to windower" */
- }
- }
-
- debug_printf("%s DONE ==============\n", __FUNCTION__);
-
-}
-
-
-
-void brw_emit_line_setup( struct brw_sf_compile *c )
-{
- struct brw_compile *p = &c->func;
- unsigned i;
-
-
- c->nr_verts = 2;
- alloc_regs(c);
- invert_det(c);
- copy_z_inv_w(c);
-
- for (i = 0; i < c->nr_setup_regs; i++)
- {
- /* Pair of incoming attributes:
- */
- struct brw_reg a0 = offset(c->vert[0], i);
- struct brw_reg a1 = offset(c->vert[1], i);
- ushort pc, pc_persp, pc_linear;
- boolean last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
-
- if (pc_persp)
- {
- brw_set_predicate_control_flag_value(p, pc_persp);
- brw_MUL(p, a0, a0, c->inv_w[0]);
- brw_MUL(p, a1, a1, c->inv_w[1]);
- }
-
- /* Calculate coefficients for position, color:
- */
- if (pc_linear) {
- brw_set_predicate_control_flag_value(p, pc_linear);
-
- brw_ADD(p, c->a1_sub_a0, a1, negate(a0));
-
- brw_MUL(p, c->tmp, c->a1_sub_a0, c->dx0);
- brw_MUL(p, c->m1Cx, c->tmp, c->inv_det);
-
- brw_MUL(p, c->tmp, c->a1_sub_a0, c->dy0);
- brw_MUL(p, c->m2Cy, c->tmp, c->inv_det);
- }
-
- {
- brw_set_predicate_control_flag_value(p, pc);
-
- /* start point for interpolation
- */
- brw_MOV(p, c->m3C0, a0);
-
- /* Copy m0..m3 to URB.
- */
- brw_urb_WRITE(p,
- brw_null_reg(),
- 0,
- brw_vec8_grf(0, 0),
- 0, /* allocate */
- 1, /* used */
- 4, /* msg len */
- 0, /* response len */
- last, /* eot */
- last, /* writes complete */
- i*4, /* urb destination offset */
- BRW_URB_SWIZZLE_TRANSPOSE);
- }
- }
-}
-
-
-/* Points setup - several simplifications as all attributes are
- * constant across the face of the point (point sprites excluded!)
- */
-void brw_emit_point_setup( struct brw_sf_compile *c )
-{
- struct brw_compile *p = &c->func;
- unsigned i;
-
- c->nr_verts = 1;
- alloc_regs(c);
- copy_z_inv_w(c);
-
- brw_MOV(p, c->m1Cx, brw_imm_ud(0)); /* zero - move out of loop */
- brw_MOV(p, c->m2Cy, brw_imm_ud(0)); /* zero - move out of loop */
-
- for (i = 0; i < c->nr_setup_regs; i++)
- {
- struct brw_reg a0 = offset(c->vert[0], i);
- ushort pc, pc_persp, pc_linear;
- boolean last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
-
- if (pc_persp)
- {
- /* This seems odd as the values are all constant, but the
- * fragment shader will be expecting it:
- */
- brw_set_predicate_control_flag_value(p, pc_persp);
- brw_MUL(p, a0, a0, c->inv_w[0]);
- }
-
-
- /* The delta values are always zero, just send the starting
- * coordinate. Again, this is to fit in with the interpolation
- * code in the fragment shader.
- */
- {
- brw_set_predicate_control_flag_value(p, pc);
-
- brw_MOV(p, c->m3C0, a0); /* constant value */
-
- /* Copy m0..m3 to URB.
- */
- brw_urb_WRITE(p,
- brw_null_reg(),
- 0,
- brw_vec8_grf(0, 0),
- 0, /* allocate */
- 1, /* used */
- 4, /* msg len */
- 0, /* response len */
- last, /* eot */
- last, /* writes complete */
- i*4, /* urb destination offset */
- BRW_URB_SWIZZLE_TRANSPOSE);
- }
- }
-}
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