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i965: new VS: move NDC computation (GEN4-5) to a separate function.

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Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Paul Berry
2011-08-23 10:26:15 -07:00
parent 34fbab2125
commit f86d1976f8
2 changed files with 9 additions and 2 deletions
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src/mesa/drivers/dri/i965/brw_vec4.h
+1
View File
@@ -463,6 +463,7 @@ public:
void emit_math2_gen4(enum opcode opcode, dst_reg dst, src_reg src0, src_reg src1);
void emit_math(enum opcode opcode, dst_reg dst, src_reg src0, src_reg src1);
void emit_ndc_computation();
int emit_vue_header_gen6(int header_mrf);
int emit_vue_header_gen4(int header_mrf);
void emit_urb_writes(void);
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+8 -2
View File
@@ -1698,8 +1698,8 @@ vec4_visitor::visit(ir_if *ir)
emit(BRW_OPCODE_ENDIF);
}
int
vec4_visitor::emit_vue_header_gen4(int header_mrf)
void
vec4_visitor::emit_ndc_computation()
{
/* Get the position */
src_reg pos = src_reg(output_reg[VERT_RESULT_HPOS]);
@@ -1719,6 +1719,12 @@ vec4_visitor::emit_vue_header_gen4(int header_mrf)
ndc_xyz.writemask = WRITEMASK_XYZ;
emit(MUL(ndc_xyz, pos, src_reg(ndc_w)));
}
int
vec4_visitor::emit_vue_header_gen4(int header_mrf)
{
emit_ndc_computation();
if ((c->prog_data.outputs_written & BITFIELD64_BIT(VERT_RESULT_PSIZ)) ||
c->key.nr_userclip || brw->has_negative_rhw_bug) {