diff options
Diffstat (limited to 'i965/brw_clip_line.c')
| -rw-r--r-- | i965/brw_clip_line.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/i965/brw_clip_line.c b/i965/brw_clip_line.c index 8318227..0930e6a 100644 --- a/i965/brw_clip_line.c +++ b/i965/brw_clip_line.c @@ -130,6 +130,7 @@ 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 *not_culled; struct brw_reg v1_null_ud = retype(vec1(brw_null_reg()), BRW_REGISTER_TYPE_UD); @@ -146,6 +147,16 @@ static void clip_and_emit_line( struct brw_clip_compile *c ) brw_clip_init_planes(c); brw_clip_init_clipmask(c); + /* -ve rhw workaround */ + if (!(BRW_IS_GM45(p->brw) || BRW_IS_G4X(p->brw))) { + 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)); + brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud(0x3f)); + } + + brw_set_predicate_control(p, BRW_PREDICATE_NONE); + plane_loop = brw_DO(p, BRW_EXECUTE_1); { /* if (planemask & 1) @@ -183,13 +194,20 @@ static void clip_and_emit_line( struct brw_clip_compile *c ) /* Coming back in. We know that both cannot be negative * because the line would have been culled in that case. */ - 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 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_ENDIF(p, is_negative); } |