[Mesa-dev] [PATCH v2 22/23] nir: add a pass for lowering (un)pack_double_2x32
Samuel Iglesias Gonsálvez
siglesias at igalia.com
Thu Mar 31 10:00:10 UTC 2016
From: Connor Abbott <connor.w.abbott at intel.com>
v2: Undo unintended change to the signature of
nir_normalize_cubemap_coords (Iago).
v3: Move to compiler/nir (Iago)
v4: Remove Authors from copyright header (Michael Schellenberger)
Signed-off-by: Iago Toral Quiroga <itoral at igalia.com>
---
src/compiler/Makefile.sources | 1 +
src/compiler/glsl/Makefile.sources | 1 +
src/compiler/nir/Makefile.sources | 1 +
src/compiler/nir/nir.h | 2 +
src/compiler/nir/nir_lower_double_packing.c | 106 ++++++++++++++++++++++++++++
5 files changed, 111 insertions(+)
create mode 100644 src/compiler/nir/nir_lower_double_packing.c
diff --git a/src/compiler/Makefile.sources b/src/compiler/Makefile.sources
index 0aee200..adb7caa 100644
--- a/src/compiler/Makefile.sources
+++ b/src/compiler/Makefile.sources
@@ -186,6 +186,7 @@ NIR_FILES = \
nir/nir_lower_alu_to_scalar.c \
nir/nir_lower_atomics.c \
nir/nir_lower_clip.c \
+ nir/nir_lower_double_packing.c \
nir/nir_lower_global_vars_to_local.c \
nir/nir_lower_gs_intrinsics.c \
nir/nir_lower_load_const_to_scalar.c \
diff --git a/src/compiler/glsl/Makefile.sources b/src/compiler/glsl/Makefile.sources
index 538196a..fadfab8 100644
--- a/src/compiler/glsl/Makefile.sources
+++ b/src/compiler/glsl/Makefile.sources
@@ -38,6 +38,7 @@ NIR_FILES = \
nir/nir_lower_alu_to_scalar.c \
nir/nir_lower_atomics.c \
nir/nir_lower_clip.c \
+ nir/nir_lower_double_packing.c \
nir/nir_lower_global_vars_to_local.c \
nir/nir_lower_gs_intrinsics.c \
nir/nir_lower_load_const_to_scalar.c \
diff --git a/src/compiler/nir/Makefile.sources b/src/compiler/nir/Makefile.sources
index 3474302..488040d 100644
--- a/src/compiler/nir/Makefile.sources
+++ b/src/compiler/nir/Makefile.sources
@@ -29,6 +29,7 @@ NIR_FILES = \
nir_lower_alu_to_scalar.c \
nir_lower_atomics.c \
nir_lower_clip.c \
+ nir_lower_double_packing.c \
nir_lower_global_vars_to_local.c \
nir_lower_gs_intrinsics.c \
nir_lower_load_const_to_scalar.c \
diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index ac709d5..4c9c16a 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -2278,6 +2278,8 @@ void nir_lower_to_source_mods(nir_shader *shader);
bool nir_lower_gs_intrinsics(nir_shader *shader);
+void nir_lower_double_pack(nir_shader *shader);
+
bool nir_normalize_cubemap_coords(nir_shader *shader);
void nir_live_ssa_defs_impl(nir_function_impl *impl);
diff --git a/src/compiler/nir/nir_lower_double_packing.c b/src/compiler/nir/nir_lower_double_packing.c
new file mode 100644
index 0000000..7d8a4de
--- /dev/null
+++ b/src/compiler/nir/nir_lower_double_packing.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+/*
+ * lowers:
+ *
+ * packDouble2x32(foo) -> packDouble2x32Split(foo.x, foo.y)
+ * unpackDouble2x32(foo) -> vec2(unpackDouble2x32_x(foo), unpackDouble2x32_y(foo))
+ */
+
+static nir_ssa_def *
+component(nir_builder *b, nir_ssa_def *src, unsigned component)
+{
+ return nir_swizzle(b, src, (unsigned[]) {component}, 1, true);
+}
+
+static nir_ssa_def *
+lower_pack_double(nir_builder *b, nir_ssa_def *src)
+{
+ return nir_pack_double_2x32_split(b, component(b, src, 0),
+ component(b, src, 1));
+}
+
+static nir_ssa_def *
+lower_unpack_double(nir_builder *b, nir_ssa_def *src)
+{
+ return nir_vec2(b, nir_unpack_double_2x32_split_x(b, src),
+ nir_unpack_double_2x32_split_y(b, src));
+}
+
+static void
+lower_double_pack_instr(nir_alu_instr *instr)
+{
+ if (instr->op != nir_op_pack_double_2x32 &&
+ instr->op != nir_op_unpack_double_2x32)
+ return;
+
+ nir_builder b;
+ nir_builder_init(&b, nir_cf_node_get_function(&instr->instr.block->cf_node));
+ b.cursor = nir_before_instr(&instr->instr);
+
+ nir_ssa_def *src = nir_fmov_alu(&b, instr->src[0],
+ nir_op_infos[instr->op].input_sizes[0]);
+ nir_ssa_def *dest =
+ instr->op == nir_op_pack_double_2x32 ?
+ lower_pack_double(&b, src) :
+ lower_unpack_double(&b, src);
+
+ nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(dest));
+ nir_instr_remove(&instr->instr);
+}
+
+static bool
+lower_double_pack_block(nir_block *block, void *ctx)
+{
+ (void) ctx;
+
+ nir_foreach_instr_safe(block, instr) {
+ if (instr->type != nir_instr_type_alu)
+ continue;
+
+ lower_double_pack_instr(nir_instr_as_alu(instr));
+ }
+
+ return true;
+}
+
+static void
+lower_double_pack_impl(nir_function_impl *impl)
+{
+ nir_foreach_block(impl, lower_double_pack_block, NULL);
+}
+
+void
+nir_lower_double_pack(nir_shader *shader)
+{
+ nir_foreach_function(shader, function) {
+ if (function->impl)
+ lower_double_pack_impl(function->impl);
+ }
+}
+
--
2.5.0
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