panfrost: Adds Bifrost shader disassembler utility

[mesa.git] / src / gallium / drivers / panfrost / bifrost / bifrost.h

diff --git a/src/gallium/drivers/panfrost/bifrost/bifrost.h b/src/gallium/drivers/panfrost/bifrost/bifrost.h
new file mode 100644 (file)
index 0000000..aa382b4
--- /dev/null
+++ b/src/gallium/drivers/panfrost/bifrost/bifrost.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2019 Connor Abbott <cwabbott0@gmail.com>
+ * Copyright (C) 2019 Lyude Paul <thatslyude@gmail.com>
+ * Copyright (C) 2019 Ryan Houdek <Sonicadvance1@gmail.com>
+ *
+ * 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.
+ */
+
+#ifndef __bifrost_h__
+#define __bifrost_h__
+
+#include <stdint.h>
+#include <stdbool.h>
+
+struct bifrost_header {
+        unsigned unk0 : 7;
+        // If true, convert any infinite result of any floating-point operation to
+        // the biggest representable number.
+        unsigned suppress_inf: 1;
+        // Convert any NaN results to 0.
+        unsigned suppress_nan : 1;
+        unsigned unk1 : 2;
+        // true if the execution mask of the next clause is the same as the mask of
+        // the current clause.
+        unsigned back_to_back : 1;
+        unsigned no_end_of_shader: 1;
+        unsigned unk2 : 2;
+        // Set to true for fragment shaders, to implement this bit of spec text
+        // from section 7.1.5 of the GLSL ES spec:
+        //
+        // "Stores to image and buffer variables performed by helper invocations
+        // have no effect on the underlying image or buffer memory."
+        //
+        // Helper invocations are threads (invocations) corresponding to pixels in
+        // a quad that aren't actually part of the triangle, but are included to
+        // make derivatives work correctly. They're usually turned on, but they
+        // need to be masked off for GLSL-level stores. This bit seems to be the
+        // only bit that's actually different between fragment shaders and other
+        // shaders, so this is probably what it's doing.
+        unsigned elide_writes : 1;
+        // If backToBack is off:
+        // - true for conditional branches and fallthrough
+        // - false for unconditional branches
+        // The blob seems to always set it to true if back-to-back is on.
+        unsigned branch_cond : 1;
+        // This bit is set when the next clause writes to the data register of some
+        // previous clause.
+        unsigned datareg_writebarrier: 1;
+        unsigned datareg : 6;
+        unsigned scoreboard_deps: 8;
+        unsigned scoreboard_index: 3;
+        unsigned clause_type: 4;
+        unsigned unk3 : 1; // part of clauseType?
+        unsigned next_clause_type: 4;
+        unsigned unk4 : 1; // part of nextClauseType?
+};
+
+struct bifrost_fma_inst {
+        unsigned src0 : 3;
+        unsigned op   : 20;
+};
+
+struct bifrost_add_inst {
+        unsigned src0 : 3;
+        unsigned op   : 17;
+};
+
+#endif