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i965: new VS: Use output_reg[] to find NDC and HPOS registers.

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Previously, emit_vue_header_gen4() used local variables to keep track
of which registers were storing the NDC and HPOS.  This patch uses the
output_reg[] array instead, so that the code that manipulates NDC and
HPOS can be more easily refactored.

Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Paul Berry 2011-08-23 10:17:34 -07:00
parent 85e57eb9ca
commit 34fbab2125
2 changed files with 14 additions and 8 deletions
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2
src/mesa/drivers/dri/i965/brw_vec4.h
View file

@ -360,7 +360,7 @@ public:
/* Regs for vertex results. Generated at ir_variable visiting time
* for the ir->location's used.
*/
dst_reg output_reg[VERT_RESULT_MAX];
dst_reg output_reg[BRW_VERT_RESULT_MAX];
int uniform_size[MAX_UNIFORMS];
int uniform_vector_size[MAX_UNIFORMS];
int uniforms;

20
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
View file

@ -1706,6 +1706,7 @@ vec4_visitor::emit_vue_header_gen4(int header_mrf)
/* Build ndc coords, which are (x/w, y/w, z/w, 1/w) */
dst_reg ndc = dst_reg(this, glsl_type::vec4_type);
output_reg[BRW_VERT_RESULT_NDC] = ndc;
current_annotation = "NDC";
dst_reg ndc_w = ndc;
@ -1738,7 +1739,8 @@ vec4_visitor::emit_vue_header_gen4(int header_mrf)
for (i = 0; i < c->key.nr_userclip; i++) {
vec4_instruction *inst;
inst = emit(DP4(dst_null_f(), pos, src_reg(c->userplane[i])));
inst = emit(DP4(dst_null_f(), src_reg(output_reg[VERT_RESULT_HPOS]),
src_reg(c->userplane[i])));
inst->conditional_mod = BRW_CONDITIONAL_L;
emit(OR(header1, src_reg(header1), 1u << i));
@ -1760,11 +1762,11 @@ vec4_visitor::emit_vue_header_gen4(int header_mrf)
brw_CMP(p,
vec8(brw_null_reg()),
BRW_CONDITIONAL_L,
brw_swizzle1(ndc, 3),
brw_swizzle1(output_reg[BRW_VERT_RESULT_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_MOV(p, output_reg[BRW_VERT_RESULT_NDC], brw_imm_f(0));
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
#endif
}
@ -1786,10 +1788,12 @@ vec4_visitor::emit_vue_header_gen4(int header_mrf)
* m7 is the first vertex data we fill.
*/
current_annotation = "NDC";
emit(MOV(brw_message_reg(header_mrf++), src_reg(ndc)));
emit(MOV(brw_message_reg(header_mrf++),
src_reg(output_reg[BRW_VERT_RESULT_NDC])));
current_annotation = "gl_Position";
emit(MOV(brw_message_reg(header_mrf++), pos));
emit(MOV(brw_message_reg(header_mrf++),
src_reg(output_reg[VERT_RESULT_HPOS])));
/* user clip distance. */
header_mrf += 2;
@ -1804,10 +1808,12 @@ vec4_visitor::emit_vue_header_gen4(int header_mrf)
* dword 8-11 (m3) is the first vertex data.
*/
current_annotation = "NDC";
emit(MOV(brw_message_reg(header_mrf++), src_reg(ndc)));
emit(MOV(brw_message_reg(header_mrf++),
src_reg(output_reg[BRW_VERT_RESULT_NDC])));
current_annotation = "gl_Position";
emit(MOV(brw_message_reg(header_mrf++), pos));
emit(MOV(brw_message_reg(header_mrf++),
src_reg(output_reg[VERT_RESULT_HPOS])));
}
return header_mrf;