diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_vs_emit.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs_emit.c | 40 |
1 files changed, 24 insertions, 16 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c index a22740084d..da9d3bacb0 100644 --- a/src/mesa/drivers/dri/i965/brw_vs_emit.c +++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c @@ -797,13 +797,21 @@ static void emit_vertex_write( struct brw_vs_compile *c) /* Build ndc coords? TODO: Shortcircuit when w is known to be one. */ - ndc = get_tmp(c); - emit_math1(c, BRW_MATH_FUNCTION_INV, ndc, brw_swizzle1(pos, 3), BRW_MATH_PRECISION_FULL); - brw_MUL(p, brw_writemask(ndc, WRITEMASK_XYZ), pos, ndc); + if (!c->key.know_w_is_one) { + ndc = get_tmp(c); + emit_math1(c, BRW_MATH_FUNCTION_INV, ndc, brw_swizzle1(pos, 3), BRW_MATH_PRECISION_FULL); + brw_MUL(p, brw_writemask(ndc, WRITEMASK_XYZ), pos, ndc); + } + else { + ndc = pos; + } /* This includes the workaround for -ve rhw, so is no longer an * optional step: */ + if ((c->prog_data.outputs_written & (1<<VERT_RESULT_PSIZ)) || + c->key.nr_userclip || + !c->key.know_w_is_one) { struct brw_reg header1 = retype(get_tmp(c), BRW_REGISTER_TYPE_UD); GLuint i; @@ -836,20 +844,17 @@ static void emit_vertex_write( struct brw_vs_compile *c) * Later, clipping will detect ucp[6] and ensure the primitive is * clipped against all fixed planes. */ - brw_CMP(p, - vec8(brw_null_reg()), - BRW_CONDITIONAL_L, - brw_swizzle1(ndc, 3), - brw_imm_f(0)); + if (!c->key.know_w_is_one) { + brw_CMP(p, + vec8(brw_null_reg()), + BRW_CONDITIONAL_L, + brw_swizzle1(ndc, 3), + brw_imm_f(0)); - brw_OR(p, brw_writemask(header1, WRITEMASK_W), header1, brw_imm_ud(1<<6)); - brw_MOV(p, ndc, brw_imm_f(0)); - brw_set_predicate_control(p, BRW_PREDICATE_NONE); - - - - - + brw_OR(p, brw_writemask(header1, WRITEMASK_W), header1, brw_imm_ud(1<<6)); + brw_MOV(p, ndc, brw_imm_f(0)); + brw_set_predicate_control(p, BRW_PREDICATE_NONE); + } brw_set_access_mode(p, BRW_ALIGN_1); /* why? */ brw_MOV(p, retype(brw_message_reg(1), BRW_REGISTER_TYPE_UD), header1); @@ -857,6 +862,9 @@ static void emit_vertex_write( struct brw_vs_compile *c) release_tmp(c, header1); } + else { + brw_MOV(p, retype(brw_message_reg(1), BRW_REGISTER_TYPE_UD), brw_imm_ud(0)); + } /* Emit the (interleaved) headers for the two vertices - an 8-reg |