diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_clip_tri.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_clip_tri.c | 76 |
1 files changed, 56 insertions, 20 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_clip_tri.c b/src/mesa/drivers/dri/i965/brw_clip_tri.c index 1dbba37fe7e..7fd37bd05ff 100644 --- a/src/mesa/drivers/dri/i965/brw_clip_tri.c +++ b/src/mesa/drivers/dri/i965/brw_clip_tri.c @@ -455,6 +455,8 @@ static void brw_clip_test( struct brw_clip_compile *c ) struct brw_indirect vt2 = brw_indirect(2, 0); struct brw_compile *p = &c->func; + struct brw_instruction *is_outside; + struct brw_reg tmp0 = c->reg.loopcount; /* handy temporary */ brw_MOV(p, get_addr_reg(vt0), brw_address(c->reg.vertex[0])); brw_MOV(p, get_addr_reg(vt1), brw_address(c->reg.vertex[1])); @@ -462,53 +464,87 @@ static void brw_clip_test( struct brw_clip_compile *c ) brw_MOV(p, v0, deref_4f(vt0, c->offset[VERT_RESULT_HPOS])); brw_MOV(p, v1, deref_4f(vt1, c->offset[VERT_RESULT_HPOS])); brw_MOV(p, v2, deref_4f(vt2, c->offset[VERT_RESULT_HPOS])); + brw_AND(p, c->reg.planemask, c->reg.planemask, brw_imm_ud(~0x3f)); /* test nearz, xmin, ymin plane */ - brw_CMP(p, t1, BRW_CONDITIONAL_LE, negate(v0), get_element(v0, 3)); + /* clip.xyz < -clip.w */ + brw_CMP(p, t1, BRW_CONDITIONAL_L, v0, negate(get_element(v0, 3))); brw_set_predicate_control(p, BRW_PREDICATE_NONE); - brw_CMP(p, t2, BRW_CONDITIONAL_LE, negate(v1), get_element(v1, 3)); + brw_CMP(p, t2, BRW_CONDITIONAL_L, v1, negate(get_element(v1, 3))); brw_set_predicate_control(p, BRW_PREDICATE_NONE); - brw_CMP(p, t3, BRW_CONDITIONAL_LE, negate(v2), get_element(v2, 3)); + brw_CMP(p, t3, BRW_CONDITIONAL_L, v2, negate(get_element(v2, 3))); brw_set_predicate_control(p, BRW_PREDICATE_NONE); + + /* All vertices are outside of a plane, rejected */ + brw_AND(p, t, t1, t2); + brw_AND(p, t, t, t3); + brw_OR(p, tmp0, get_element(t, 0), get_element(t, 1)); + brw_OR(p, tmp0, tmp0, get_element(t, 2)); + brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ); + brw_AND(p, brw_null_reg(), tmp0, brw_imm_ud(0x1)); + is_outside = brw_IF(p, BRW_EXECUTE_1); + { + brw_clip_kill_thread(c); + } + brw_ENDIF(p, is_outside); + brw_set_predicate_control(p, BRW_PREDICATE_NONE); + + /* some vertices are inside a plane, some are outside,need to clip */ brw_XOR(p, t, t1, t2); brw_XOR(p, t1, t2, t3); brw_OR(p, t, t, t1); - - brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, - get_element(t, 0), brw_imm_ud(0)); + brw_AND(p, t, t, brw_imm_ud(0x1)); + brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, + get_element(t, 0), brw_imm_ud(0)); brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<5))); brw_set_predicate_control(p, BRW_PREDICATE_NONE); - brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, - get_element(t, 1), brw_imm_ud(0)); + brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, + get_element(t, 1), brw_imm_ud(0)); brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<3))); brw_set_predicate_control(p, BRW_PREDICATE_NONE); - brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, - get_element(t, 2), brw_imm_ud(0)); + brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, + get_element(t, 2), brw_imm_ud(0)); brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<1))); brw_set_predicate_control(p, BRW_PREDICATE_NONE); /* test farz, xmax, ymax plane */ - brw_CMP(p, t1, BRW_CONDITIONAL_L, v0, get_element(v0, 3)); + /* clip.xyz > clip.w */ + brw_CMP(p, t1, BRW_CONDITIONAL_G, v0, get_element(v0, 3)); brw_set_predicate_control(p, BRW_PREDICATE_NONE); - brw_CMP(p, t2, BRW_CONDITIONAL_L, v1, get_element(v1, 3)); + brw_CMP(p, t2, BRW_CONDITIONAL_G, v1, get_element(v1, 3)); brw_set_predicate_control(p, BRW_PREDICATE_NONE); - brw_CMP(p, t3, BRW_CONDITIONAL_L, v2, get_element(v2, 3)); + brw_CMP(p, t3, BRW_CONDITIONAL_G, v2, get_element(v2, 3)); brw_set_predicate_control(p, BRW_PREDICATE_NONE); + /* All vertices are outside of a plane, rejected */ + brw_AND(p, t, t1, t2); + brw_AND(p, t, t, t3); + brw_OR(p, tmp0, get_element(t, 0), get_element(t, 1)); + brw_OR(p, tmp0, tmp0, get_element(t, 2)); + brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ); + brw_AND(p, brw_null_reg(), tmp0, brw_imm_ud(0x1)); + is_outside = brw_IF(p, BRW_EXECUTE_1); + { + brw_clip_kill_thread(c); + } + brw_ENDIF(p, is_outside); + brw_set_predicate_control(p, BRW_PREDICATE_NONE); + + /* some vertices are inside a plane, some are outside,need to clip */ brw_XOR(p, t, t1, t2); brw_XOR(p, t1, t2, t3); brw_OR(p, t, t, t1); - - brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, - get_element(t, 0), brw_imm_ud(0)); + brw_AND(p, t, t, brw_imm_ud(0x1)); + brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, + get_element(t, 0), brw_imm_ud(0)); brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<4))); brw_set_predicate_control(p, BRW_PREDICATE_NONE); - brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, - get_element(t, 1), brw_imm_ud(0)); + brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, + get_element(t, 1), brw_imm_ud(0)); brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<2))); brw_set_predicate_control(p, BRW_PREDICATE_NONE); - brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, - get_element(t, 2), brw_imm_ud(0)); + brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ, + get_element(t, 2), brw_imm_ud(0)); brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<0))); brw_set_predicate_control(p, BRW_PREDICATE_NONE); |