r300g: copy the compiler from r300c

What a beast.

r300g doesn't depend on files from r300c anymore, so r300c is now left
to its own fate. BTW 'make test' can be invoked from the gallium/r300
directory to run some compiler unit tests.

1 files changed, 103 insertions, 0 deletions

diff --git a/src/gallium/drivers/r300/compiler/radeon_dataflow_swizzles.c b/src/gallium/drivers/r300/compiler/radeon_dataflow_swizzles.c
new file mode 100644
index 00000000000..133a9f72ec7
--- /dev/null
+++ b/src/gallium/drivers/r300/compiler/radeon_dataflow_swizzles.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2009 Nicolai Haehnle.
+ *
+ * All Rights Reserved.
+ *
+ * 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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 "radeon_dataflow.h"
+
+#include "radeon_compiler.h"
+#include "radeon_swizzle.h"
+
+
+static void rewrite_source(struct radeon_compiler * c,
+		struct rc_instruction * inst, unsigned src)
+{
+	struct rc_swizzle_split split;
+	unsigned int tempreg = rc_find_free_temporary(c);
+	unsigned int usemask;
+
+	usemask = 0;
+	for(unsigned int chan = 0; chan < 4; ++chan) {
+		if (GET_SWZ(inst->U.I.SrcReg[src].Swizzle, chan) != RC_SWIZZLE_UNUSED)
+			usemask |= 1 << chan;
+	}
+
+	c->SwizzleCaps->Split(inst->U.I.SrcReg[src], usemask, &split);
+
+	for(unsigned int phase = 0; phase < split.NumPhases; ++phase) {
+		struct rc_instruction * mov = rc_insert_new_instruction(c, inst->Prev);
+		unsigned int phase_refmask;
+		unsigned int masked_negate;
+
+		mov->U.I.Opcode = RC_OPCODE_MOV;
+		mov->U.I.DstReg.File = RC_FILE_TEMPORARY;
+		mov->U.I.DstReg.Index = tempreg;
+		mov->U.I.DstReg.WriteMask = split.Phase[phase];
+		mov->U.I.SrcReg[0] = inst->U.I.SrcReg[src];
+		mov->U.I.PreSub = inst->U.I.PreSub;
+
+		phase_refmask = 0;
+		for(unsigned int chan = 0; chan < 4; ++chan) {
+			if (!GET_BIT(split.Phase[phase], chan))
+				SET_SWZ(mov->U.I.SrcReg[0].Swizzle, chan, RC_SWIZZLE_UNUSED);
+			else
+				phase_refmask |= 1 << GET_SWZ(mov->U.I.SrcReg[0].Swizzle, chan);
+		}
+
+		phase_refmask &= RC_MASK_XYZW;
+
+		masked_negate = split.Phase[phase] & mov->U.I.SrcReg[0].Negate;
+		if (masked_negate == 0)
+			mov->U.I.SrcReg[0].Negate = 0;
+		else if (masked_negate == split.Phase[phase])
+			mov->U.I.SrcReg[0].Negate = RC_MASK_XYZW;
+
+	}
+
+	inst->U.I.SrcReg[src].File = RC_FILE_TEMPORARY;
+	inst->U.I.SrcReg[src].Index = tempreg;
+	inst->U.I.SrcReg[src].Swizzle = 0;
+	inst->U.I.SrcReg[src].Negate = RC_MASK_NONE;
+	inst->U.I.SrcReg[src].Abs = 0;
+	for(unsigned int chan = 0; chan < 4; ++chan) {
+		SET_SWZ(inst->U.I.SrcReg[src].Swizzle, chan,
+				GET_BIT(usemask, chan) ? chan : RC_SWIZZLE_UNUSED);
+	}
+}
+
+void rc_dataflow_swizzles(struct radeon_compiler * c, void *user)
+{
+	struct rc_instruction * inst;
+
+	for(inst = c->Program.Instructions.Next; inst != &c->Program.Instructions; inst = inst->Next) {
+		const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->U.I.Opcode);
+		unsigned int src;
+
+		for(src = 0; src < opcode->NumSrcRegs; ++src) {
+			if (!c->SwizzleCaps->IsNative(inst->U.I.Opcode, inst->U.I.SrcReg[src]))
+				rewrite_source(c, inst, src);
+		}
+	}
+}