i965: Mostly fix glsl-max-varyings.

[mesa.git] / src / mesa / drivers / dri / i965 / brw_clip_line.c

diff --git a/src/mesa/drivers/dri/i965/brw_clip_line.c b/src/mesa/drivers/dri/i965/brw_clip_line.c
index c45d48dff8e161a5d898eb522066606b7b847e0b..4b9117bb0b17eac143fcaaadee7b487644f6209b 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_clip_line.c
+++ b/src/mesa/drivers/dri/i965/brw_clip_line.c
@@ -32,20 +32,20 @@
 #include "main/glheader.h"
 #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_clip.h"
 
 
 
 static void brw_clip_line_alloc_regs( struct brw_clip_compile *c )
 {
+   struct intel_context *intel = &c->func.brw->intel;
    GLuint i = 0,j;
 
    /* Register usage is static, precompute here:
@@ -85,6 +85,10 @@ static void brw_clip_line_alloc_regs( struct brw_clip_compile *c )
       i++;
    }
 
+   if (intel->needs_ff_sync) {
+      c->reg.ff_sync = retype(brw_vec1_grf(i, 0), BRW_REGISTER_TYPE_UD);
+      i++;
+   }
 
    c->first_tmp = i;
    c->last_tmp = i;
@@ -122,6 +126,7 @@ static void brw_clip_line_alloc_regs( struct brw_clip_compile *c )
 static void clip_and_emit_line( struct brw_clip_compile *c )
 {
    struct brw_compile *p = &c->func;
+   struct brw_context *brw = p->brw;
    struct brw_indirect vtx0     = brw_indirect(0, 0);
    struct brw_indirect vtx1      = brw_indirect(1, 0);
    struct brw_indirect newvtx0   = brw_indirect(2, 0);
@@ -130,7 +135,7 @@ static void clip_and_emit_line( struct brw_clip_compile *c )
    struct brw_instruction *plane_loop;
    struct brw_instruction *plane_active;
    struct brw_instruction *is_negative;
-   struct brw_instruction *is_neg2;
+   struct brw_instruction *is_neg2 = NULL;
    struct brw_instruction *not_culled;
    struct brw_reg v1_null_ud = retype(vec1(brw_null_reg()), BRW_REGISTER_TYPE_UD);
 
@@ -148,7 +153,7 @@ static void clip_and_emit_line( struct brw_clip_compile *c )
    brw_clip_init_clipmask(c);
 
    /* -ve rhw workaround */
-   if (!BRW_IS_G4X(p->brw)) {
+   if (brw->has_negative_rhw_bug) {
       brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ);
       brw_AND(p, brw_null_reg(), get_element_ud(c->reg.R0, 2),
               brw_imm_ud(1<<20));
@@ -181,34 +186,54 @@ static void clip_and_emit_line( struct brw_clip_compile *c )
         brw_DP4(p, vec4(c->reg.dp1), deref_4f(vtx1, c->offset[VERT_RESULT_HPOS]), c->reg.plane_equation);
         is_negative = brw_IF(p, BRW_EXECUTE_1);
         {
-           brw_ADD(p, c->reg.t, c->reg.dp1, negate(c->reg.dp0));
-           brw_math_invert(p, c->reg.t, c->reg.t);
-           brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp1);
-
-           brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_G, c->reg.t, c->reg.t1 );
-           brw_MOV(p, c->reg.t1, c->reg.t);
-           brw_set_predicate_control(p, BRW_PREDICATE_NONE);
+             /*
+              * Both can be negative on GM965/G965 due to RHW workaround
+              * if so, this object should be rejected.
+              */
+             if (brw->has_negative_rhw_bug) {
+                 brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_LE, c->reg.dp0, brw_imm_f(0.0));
+                 is_neg2 = brw_IF(p, BRW_EXECUTE_1);
+                 {
+                     brw_clip_kill_thread(c);
+                 }
+                 brw_ENDIF(p, is_neg2);
+             }
+
+             brw_ADD(p, c->reg.t, c->reg.dp1, negate(c->reg.dp0));
+             brw_math_invert(p, c->reg.t, c->reg.t);
+             brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp1);
+
+             brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_G, c->reg.t, c->reg.t1 );
+             brw_MOV(p, c->reg.t1, c->reg.t);
+             brw_set_predicate_control(p, BRW_PREDICATE_NONE);
         } 
         is_negative = brw_ELSE(p, is_negative);
         {
-           /* Coming back in.  We know that both cannot be negative
-            * because the line would have been culled in that case.
-            */
+             /* Coming back in.  We know that both cannot be negative
+              * because the line would have been culled in that case.
+              */
+
+             /* If both are positive, do nothing */
+             /* Only on GM965/G965 */
+             if (brw->has_negative_rhw_bug) {
+                 brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_L, c->reg.dp0, brw_imm_f(0.0));
+                 is_neg2 = brw_IF(p, BRW_EXECUTE_1);
+             }
 
-           /* If both are positive, do nothing */
-             brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_L, c->reg.dp0, brw_imm_f(0.0));
-             is_neg2 = brw_IF(p, BRW_EXECUTE_1);
              {
-               brw_ADD(p, c->reg.t, c->reg.dp0, negate(c->reg.dp1));
-               brw_math_invert(p, c->reg.t, c->reg.t);
-               brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp0);
-
-               brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_G, c->reg.t, c->reg.t0 );
-               brw_MOV(p, c->reg.t0, c->reg.t);
-               brw_set_predicate_control(p, BRW_PREDICATE_NONE);
-            }
-            brw_ENDIF(p, is_neg2);
-        }
+                 brw_ADD(p, c->reg.t, c->reg.dp0, negate(c->reg.dp1));
+                 brw_math_invert(p, c->reg.t, c->reg.t);
+                 brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp0);
+
+                 brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_G, c->reg.t, c->reg.t0 );
+                 brw_MOV(p, c->reg.t0, c->reg.t);
+                 brw_set_predicate_control(p, BRW_PREDICATE_NONE);
+             }
+
+             if (brw->has_negative_rhw_bug) {
+                 brw_ENDIF(p, is_neg2);
+             }
+         }
         brw_ENDIF(p, is_negative);      
       }
       brw_ENDIF(p, plane_active);
@@ -243,9 +268,14 @@ static void clip_and_emit_line( struct brw_clip_compile *c )
 void brw_emit_line_clip( struct brw_clip_compile *c )
 {
    brw_clip_line_alloc_regs(c);
+   brw_clip_init_ff_sync(c);
 
-   if (c->key.do_flat_shading)
-      brw_clip_copy_colors(c, 0, 1);
+   if (c->key.do_flat_shading) {
+      if (c->key.pv_first)
+         brw_clip_copy_colors(c, 1, 0);
+      else
+         brw_clip_copy_colors(c, 0, 1);
+   }
                 
    clip_and_emit_line(c);
 }