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Diffstat (limited to 'src/mesa/drivers/dri/r300/compiler/radeon_pair_translate.c')
-rw-r--r--src/mesa/drivers/dri/r300/compiler/radeon_pair_translate.c253
1 files changed, 253 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_pair_translate.c b/src/mesa/drivers/dri/r300/compiler/radeon_pair_translate.c
new file mode 100644
index 0000000000..7211768272
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_pair_translate.c
@@ -0,0 +1,253 @@
+/*
+ * 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_program_pair.h"
+
+#include "radeon_compiler.h"
+
+
+/**
+ * Finally rewrite ADD, MOV, MUL as the appropriate native instruction
+ * and reverse the order of arguments for CMP.
+ */
+static void final_rewrite(struct rc_sub_instruction *inst)
+{
+ struct rc_src_register tmp;
+
+ switch(inst->Opcode) {
+ case RC_OPCODE_ADD:
+ inst->SrcReg[2] = inst->SrcReg[1];
+ inst->SrcReg[1].File = RC_FILE_NONE;
+ inst->SrcReg[1].Swizzle = RC_SWIZZLE_1111;
+ inst->SrcReg[1].Negate = RC_MASK_NONE;
+ inst->Opcode = RC_OPCODE_MAD;
+ break;
+ case RC_OPCODE_CMP:
+ tmp = inst->SrcReg[2];
+ inst->SrcReg[2] = inst->SrcReg[0];
+ inst->SrcReg[0] = tmp;
+ break;
+ case RC_OPCODE_MOV:
+ /* AMD say we should use CMP.
+ * However, when we transform
+ * KIL -r0;
+ * into
+ * CMP tmp, -r0, -r0, 0;
+ * KIL tmp;
+ * we get incorrect behaviour on R500 when r0 == 0.0.
+ * It appears that the R500 KIL hardware treats -0.0 as less
+ * than zero.
+ */
+ inst->SrcReg[1].File = RC_FILE_NONE;
+ inst->SrcReg[1].Swizzle = RC_SWIZZLE_1111;
+ inst->SrcReg[2].File = RC_FILE_NONE;
+ inst->SrcReg[2].Swizzle = RC_SWIZZLE_0000;
+ inst->Opcode = RC_OPCODE_MAD;
+ break;
+ case RC_OPCODE_MUL:
+ inst->SrcReg[2].File = RC_FILE_NONE;
+ inst->SrcReg[2].Swizzle = RC_SWIZZLE_0000;
+ inst->Opcode = RC_OPCODE_MAD;
+ break;
+ default:
+ /* nothing to do */
+ break;
+ }
+}
+
+
+/**
+ * Classify an instruction according to which ALUs etc. it needs
+ */
+static void classify_instruction(struct rc_sub_instruction * inst,
+ int * needrgb, int * needalpha, int * istranscendent)
+{
+ *needrgb = (inst->DstReg.WriteMask & RC_MASK_XYZ) ? 1 : 0;
+ *needalpha = (inst->DstReg.WriteMask & RC_MASK_W) ? 1 : 0;
+ *istranscendent = 0;
+
+ if (inst->WriteALUResult == RC_ALURESULT_X)
+ *needrgb = 1;
+ else if (inst->WriteALUResult == RC_ALURESULT_W)
+ *needalpha = 1;
+
+ switch(inst->Opcode) {
+ case RC_OPCODE_ADD:
+ case RC_OPCODE_CMP:
+ case RC_OPCODE_DDX:
+ case RC_OPCODE_DDY:
+ case RC_OPCODE_FRC:
+ case RC_OPCODE_MAD:
+ case RC_OPCODE_MAX:
+ case RC_OPCODE_MIN:
+ case RC_OPCODE_MOV:
+ case RC_OPCODE_MUL:
+ break;
+ case RC_OPCODE_COS:
+ case RC_OPCODE_EX2:
+ case RC_OPCODE_LG2:
+ case RC_OPCODE_RCP:
+ case RC_OPCODE_RSQ:
+ case RC_OPCODE_SIN:
+ *istranscendent = 1;
+ *needalpha = 1;
+ break;
+ case RC_OPCODE_DP4:
+ *needalpha = 1;
+ /* fall through */
+ case RC_OPCODE_DP3:
+ *needrgb = 1;
+ break;
+ default:
+ break;
+ }
+}
+
+
+/**
+ * Fill the given ALU instruction's opcodes and source operands into the given pair,
+ * if possible.
+ */
+static void set_pair_instruction(struct r300_fragment_program_compiler *c,
+ struct rc_pair_instruction * pair,
+ struct rc_sub_instruction * inst)
+{
+ memset(pair, 0, sizeof(struct rc_pair_instruction));
+
+ int needrgb, needalpha, istranscendent;
+ classify_instruction(inst, &needrgb, &needalpha, &istranscendent);
+
+ if (needrgb) {
+ if (istranscendent)
+ pair->RGB.Opcode = RC_OPCODE_REPL_ALPHA;
+ else
+ pair->RGB.Opcode = inst->Opcode;
+ if (inst->SaturateMode == RC_SATURATE_ZERO_ONE)
+ pair->RGB.Saturate = 1;
+ }
+ if (needalpha) {
+ pair->Alpha.Opcode = inst->Opcode;
+ if (inst->SaturateMode == RC_SATURATE_ZERO_ONE)
+ pair->Alpha.Saturate = 1;
+ }
+
+ const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->Opcode);
+ int nargs = opcode->NumSrcRegs;
+ int i;
+
+ /* Special case for DDX/DDY (MDH/MDV). */
+ if (inst->Opcode == RC_OPCODE_DDX || inst->Opcode == RC_OPCODE_DDY) {
+ nargs++;
+ }
+
+ for(i = 0; i < opcode->NumSrcRegs; ++i) {
+ int source;
+ if (needrgb && !istranscendent) {
+ unsigned int srcrgb = 0;
+ unsigned int srcalpha = 0;
+ int j;
+ for(j = 0; j < 3; ++j) {
+ unsigned int swz = GET_SWZ(inst->SrcReg[i].Swizzle, j);
+ if (swz < 3)
+ srcrgb = 1;
+ else if (swz < 4)
+ srcalpha = 1;
+ }
+ source = rc_pair_alloc_source(pair, srcrgb, srcalpha,
+ inst->SrcReg[i].File, inst->SrcReg[i].Index);
+ pair->RGB.Arg[i].Source = source;
+ pair->RGB.Arg[i].Swizzle = inst->SrcReg[i].Swizzle & 0x1ff;
+ pair->RGB.Arg[i].Abs = inst->SrcReg[i].Abs;
+ pair->RGB.Arg[i].Negate = !!(inst->SrcReg[i].Negate & (RC_MASK_X | RC_MASK_Y | RC_MASK_Z));
+ }
+ if (needalpha) {
+ unsigned int srcrgb = 0;
+ unsigned int srcalpha = 0;
+ unsigned int swz = GET_SWZ(inst->SrcReg[i].Swizzle, istranscendent ? 0 : 3);
+ if (swz < 3)
+ srcrgb = 1;
+ else if (swz < 4)
+ srcalpha = 1;
+ source = rc_pair_alloc_source(pair, srcrgb, srcalpha,
+ inst->SrcReg[i].File, inst->SrcReg[i].Index);
+ pair->Alpha.Arg[i].Source = source;
+ pair->Alpha.Arg[i].Swizzle = swz;
+ pair->Alpha.Arg[i].Abs = inst->SrcReg[i].Abs;
+ pair->Alpha.Arg[i].Negate = !!(inst->SrcReg[i].Negate & RC_MASK_W);
+ }
+ }
+
+ /* Destination handling */
+ if (inst->DstReg.File == RC_FILE_OUTPUT) {
+ if (inst->DstReg.Index == c->OutputColor) {
+ pair->RGB.OutputWriteMask |= inst->DstReg.WriteMask & RC_MASK_XYZ;
+ pair->Alpha.OutputWriteMask |= GET_BIT(inst->DstReg.WriteMask, 3);
+ } else if (inst->DstReg.Index == c->OutputDepth) {
+ pair->Alpha.DepthWriteMask |= GET_BIT(inst->DstReg.WriteMask, 3);
+ }
+ } else {
+ if (needrgb) {
+ pair->RGB.DestIndex = inst->DstReg.Index;
+ pair->RGB.WriteMask |= inst->DstReg.WriteMask & RC_MASK_XYZ;
+ }
+ if (needalpha) {
+ pair->Alpha.DestIndex = inst->DstReg.Index;
+ pair->Alpha.WriteMask |= GET_BIT(inst->DstReg.WriteMask, 3);
+ }
+ }
+
+ if (inst->WriteALUResult) {
+ pair->WriteALUResult = inst->WriteALUResult;
+ pair->ALUResultCompare = inst->ALUResultCompare;
+ }
+}
+
+
+/**
+ * Translate all ALU instructions into corresponding pair instructions,
+ * performing no other changes.
+ */
+void rc_pair_translate(struct r300_fragment_program_compiler *c)
+{
+ for(struct rc_instruction * inst = c->Base.Program.Instructions.Next;
+ inst != &c->Base.Program.Instructions;
+ inst = inst->Next) {
+ if (inst->Type != RC_INSTRUCTION_NORMAL)
+ continue;
+
+ const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->U.I.Opcode);
+
+ if (opcode->HasTexture || opcode->IsFlowControl || opcode->Opcode == RC_OPCODE_KIL)
+ continue;
+
+ struct rc_sub_instruction copy = inst->U.I;
+
+ final_rewrite(&copy);
+ inst->Type = RC_INSTRUCTION_PAIR;
+ set_pair_instruction(c, &inst->U.P, &copy);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 21:36:31 +0000