Mesa (master): tgsi/ureg: add ureg_DECL_output_layout

[Nicolai Hähnle]

Module: Mesa
Branch: master
Commit: 2b460c750a3cd4acbe05036e92e860800b6d5a96
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2b460c750a3cd4acbe05036e92e860800b6d5a96

Author: Nicolai Hähnle <nicolai.haehnle at amd.com>
Date:   Wed Oct 12 17:24:37 2016 +0200

tgsi/ureg: add ureg_DECL_output_layout

For specifying an exact location/component.

v2: change the order of parameters (Dave)

Reviewed-by: Edward O'Callaghan <funfunctor at folklore1984.net> (v1)
Reviewed-by: Dave Airlie <airlied at redhat.com> (v1)

---

 src/gallium/auxiliary/tgsi/tgsi_ureg.c | 42 +++++++++++++++++++++++-----------
 src/gallium/auxiliary/tgsi/tgsi_ureg.h |  9 ++++++++
 2 files changed, 38 insertions(+), 13 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.c b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
index 348c371..ede648e 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
@@ -405,9 +405,10 @@ out:
 }
 
 
-struct ureg_dst 
-ureg_DECL_output_masked(struct ureg_program *ureg,
-                        unsigned name,
+struct ureg_dst
+ureg_DECL_output_layout(struct ureg_program *ureg,
+                        unsigned semantic_name,
+                        unsigned semantic_index,
                         unsigned index,
                         unsigned usage_mask,
                         unsigned array_id,
@@ -418,22 +419,24 @@ ureg_DECL_output_masked(struct ureg_program *ureg,
    assert(usage_mask != 0);
 
    for (i = 0; i < ureg->nr_outputs; i++) {
-      if (ureg->output[i].semantic_name == name &&
-          ureg->output[i].semantic_index == index) {
-         assert(ureg->output[i].array_id == array_id);
-         ureg->output[i].usage_mask |= usage_mask;
-         goto out;
+      if (ureg->output[i].semantic_name == semantic_name &&
+          ureg->output[i].semantic_index == semantic_index) {
+         if (ureg->output[i].array_id == array_id) {
+            ureg->output[i].usage_mask |= usage_mask;
+            goto out;
+         }
+         assert((ureg->output[i].usage_mask & usage_mask) == 0);
       }
    }
 
    if (ureg->nr_outputs < UREG_MAX_OUTPUT) {
-      ureg->output[i].semantic_name = name;
-      ureg->output[i].semantic_index = index;
+      ureg->output[i].semantic_name = semantic_name;
+      ureg->output[i].semantic_index = semantic_index;
       ureg->output[i].usage_mask = usage_mask;
-      ureg->output[i].first = ureg->nr_output_regs;
-      ureg->output[i].last = ureg->nr_output_regs + array_size - 1;
+      ureg->output[i].first = index;
+      ureg->output[i].last = index + array_size - 1;
       ureg->output[i].array_id = array_id;
-      ureg->nr_output_regs += array_size;
+      ureg->nr_output_regs = MAX2(ureg->nr_output_regs, index + array_size);
       ureg->nr_outputs++;
    }
    else {
@@ -446,6 +449,19 @@ out:
 }
 
 
+struct ureg_dst
+ureg_DECL_output_masked(struct ureg_program *ureg,
+                        unsigned name,
+                        unsigned index,
+                        unsigned usage_mask,
+                        unsigned array_id,
+                        unsigned array_size)
+{
+   return ureg_DECL_output_layout(ureg, name, index,
+                                  ureg->nr_output_regs, usage_mask, array_id, array_size);
+}
+
+
 struct ureg_dst 
 ureg_DECL_output(struct ureg_program *ureg,
                  unsigned name,
diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.h b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
index 0fa35bf..d3c28b3 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
@@ -248,6 +248,15 @@ ureg_DECL_system_value(struct ureg_program *,
                        unsigned semantic_index);
 
 struct ureg_dst
+ureg_DECL_output_layout(struct ureg_program *,
+                        unsigned semantic_name,
+                        unsigned semantic_index,
+                        unsigned index,
+                        unsigned usage_mask,
+                        unsigned array_id,
+                        unsigned array_size);
+
+struct ureg_dst
 ureg_DECL_output_masked(struct ureg_program *,
                         unsigned semantic_name,
                         unsigned semantic_index,