src/gallium/drivers/r300/compiler/r500_fragprog.c - platform/external/mesa3d - Git at Google

 /*
  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
  *
  * 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 "r500_fragprog.h"

 #include <stdio.h>

 #include "radeon_compiler_util.h"
 #include "radeon_list.h"
 #include "radeon_variable.h"
 #include "../r300_reg.h"

 /**
  * Rewrite IF instructions to use the ALU result special register.
  */
 int r500_transform_IF(
 	struct radeon_compiler * c,
 	struct rc_instruction * inst_if,
 	void *data)
 {
 	struct rc_variable * writer;
 	struct rc_list * writer_list, * list_ptr;
 	struct rc_list * var_list = rc_get_variables(c);
 	unsigned int generic_if = 0;
 	unsigned int alu_chan;

 	if (inst_if->U.I.Opcode != RC_OPCODE_IF) {
 		return 0;
 	}

 	writer_list = rc_variable_list_get_writers(
 			var_list, inst_if->Type, &inst_if->U.I.SrcReg[0]);
 	if (!writer_list) {
 		generic_if = 1;
 	} else {

 		/* Make sure it is safe for the writers to write to
 		 * ALU Result */
 		for (list_ptr = writer_list; list_ptr;
 						list_ptr = list_ptr->Next) {
 			struct rc_instruction * inst;
 			writer = list_ptr->Item;
 			/* We are going to modify the destination register
 			 * of writer, so if it has a reader other than
 			 * inst_if (aka ReaderCount > 1) we must fall back to
 			 * our generic IF.
 			 * If the writer has a lower IP than inst_if, this
 			 * means that inst_if is above the writer in a loop.
 			 * I'm not sure why this would ever happen, but
 			 * if it does we want to make sure we fall back
 			 * to our generic IF. */
 			if (writer->ReaderCount > 1 || writer->Inst->IP < inst_if->IP) {
 				generic_if = 1;
 				break;
 			}

 			/* The ALU Result is not preserved across IF
 			 * instructions, so if there is another IF
 			 * instruction between writer and inst_if, then
 			 * we need to fall back to generic IF. */
 			for (inst = writer->Inst; inst != inst_if; inst = inst->Next) {
 				const struct rc_opcode_info * info =
 					rc_get_opcode_info(inst->U.I.Opcode);
 				if (info->IsFlowControl) {
 					generic_if = 1;
 					break;
 				}
 			}
 			if (generic_if) {
 				break;
 			}
 		}
 	}

 	if (GET_SWZ(inst_if->U.I.SrcReg[0].Swizzle, 0) == RC_SWIZZLE_X) {
 		alu_chan = RC_ALURESULT_X;
 	} else {
 		alu_chan = RC_ALURESULT_W;
 	}
 	if (generic_if) {
 		struct rc_instruction * inst_mov =
 				rc_insert_new_instruction(c, inst_if->Prev);

 		inst_mov->U.I.Opcode = RC_OPCODE_MOV;
 		inst_mov->U.I.DstReg.WriteMask = 0;
 		inst_mov->U.I.DstReg.File = RC_FILE_NONE;
 		inst_mov->U.I.ALUResultCompare = RC_COMPARE_FUNC_NOTEQUAL;
 		inst_mov->U.I.WriteALUResult = alu_chan;
 		inst_mov->U.I.SrcReg[0] = inst_if->U.I.SrcReg[0];
 		if (alu_chan == RC_ALURESULT_X) {
 			inst_mov->U.I.SrcReg[0].Swizzle = combine_swizzles4(
 					inst_mov->U.I.SrcReg[0].Swizzle,
 					RC_SWIZZLE_X, RC_SWIZZLE_UNUSED,
 					RC_SWIZZLE_UNUSED, RC_SWIZZLE_UNUSED);
 		} else {
 			inst_mov->U.I.SrcReg[0].Swizzle = combine_swizzles4(
 					inst_mov->U.I.SrcReg[0].Swizzle,
 					RC_SWIZZLE_UNUSED, RC_SWIZZLE_UNUSED,
 					RC_SWIZZLE_UNUSED, RC_SWIZZLE_Z);
 		}
 	} else {
 		rc_compare_func compare_func = RC_COMPARE_FUNC_NEVER;
 		unsigned int reverse_srcs = 0;
 		unsigned int preserve_opcode = 0;
 		for (list_ptr = writer_list; list_ptr;
 						list_ptr = list_ptr->Next) {
 			writer = list_ptr->Item;
 			switch(writer->Inst->U.I.Opcode) {
 			case RC_OPCODE_SEQ:
 				compare_func = RC_COMPARE_FUNC_EQUAL;
 				break;
 			case RC_OPCODE_SNE:
 				compare_func = RC_COMPARE_FUNC_NOTEQUAL;
 				break;
 			case RC_OPCODE_SLE:
 				reverse_srcs = 1;
 				/* Fall through */
 			case RC_OPCODE_SGE:
 				compare_func = RC_COMPARE_FUNC_GEQUAL;
 				break;
 			case RC_OPCODE_SGT:
 				reverse_srcs = 1;
 				/* Fall through */
 			case RC_OPCODE_SLT:
 				compare_func = RC_COMPARE_FUNC_LESS;
 				break;
 			default:
 				compare_func = RC_COMPARE_FUNC_NOTEQUAL;
 				preserve_opcode = 1;
 				break;
 			}
 			if (!preserve_opcode) {
 				writer->Inst->U.I.Opcode = RC_OPCODE_SUB;
 			}
 			writer->Inst->U.I.DstReg.WriteMask = 0;
 			writer->Inst->U.I.DstReg.File = RC_FILE_NONE;
 			writer->Inst->U.I.WriteALUResult = alu_chan;
 			writer->Inst->U.I.ALUResultCompare = compare_func;
 			if (reverse_srcs) {
 				struct rc_src_register temp_src;
 				temp_src = writer->Inst->U.I.SrcReg[0];
 				writer->Inst->U.I.SrcReg[0] =
 					writer->Inst->U.I.SrcReg[1];
 				writer->Inst->U.I.SrcReg[1] = temp_src;
 			}
 		}
 	}

 	inst_if->U.I.SrcReg[0].File = RC_FILE_SPECIAL;
 	inst_if->U.I.SrcReg[0].Index = RC_SPECIAL_ALU_RESULT;
 	inst_if->U.I.SrcReg[0].Swizzle = RC_MAKE_SWIZZLE(
 				RC_SWIZZLE_X, RC_SWIZZLE_UNUSED,
 				RC_SWIZZLE_UNUSED, RC_SWIZZLE_UNUSED);
 	inst_if->U.I.SrcReg[0].Negate = 0;

 	return 1;
 }

 static int r500_swizzle_is_native(rc_opcode opcode, struct rc_src_register reg)
 {
 	unsigned int relevant;
 	int i;

 	if (opcode == RC_OPCODE_TEX ||
 	    opcode == RC_OPCODE_TXB ||
 	    opcode == RC_OPCODE_TXP ||
 	    opcode == RC_OPCODE_TXD ||
 	    opcode == RC_OPCODE_TXL ||
 	    opcode == RC_OPCODE_KIL) {
 		if (reg.Abs)
 			return 0;

 		if (opcode == RC_OPCODE_KIL && (reg.Swizzle != RC_SWIZZLE_XYZW || reg.Negate != RC_MASK_NONE))
 			return 0;

 		for(i = 0; i < 4; ++i) {
 			unsigned int swz = GET_SWZ(reg.Swizzle, i);
 			if (swz == RC_SWIZZLE_UNUSED) {
 				reg.Negate &= ~(1 << i);
 				continue;
 			}
 			if (swz >= 4)
 				return 0;
 		}

 		if (reg.Negate)
 			return 0;

 		return 1;
 	} else if (opcode == RC_OPCODE_DDX || opcode == RC_OPCODE_DDY) {
 		/* DDX/MDH and DDY/MDV explicitly ignore incoming swizzles;
 		 * if it doesn't fit perfectly into a .xyzw case... */
 		if (reg.Swizzle == RC_SWIZZLE_XYZW && !reg.Abs && !reg.Negate)
 			return 1;

 		return 0;
 	} else if (reg.File == RC_FILE_INLINE) {
 		return 1;
 	} else {
 		/* ALU instructions support almost everything */
 		relevant = 0;
 		for(i = 0; i < 3; ++i) {
 			unsigned int swz = GET_SWZ(reg.Swizzle, i);
 			if (swz != RC_SWIZZLE_UNUSED && swz != RC_SWIZZLE_ZERO)
 				relevant |= 1 << i;
 		}
 		if ((reg.Negate & relevant) && ((reg.Negate & relevant) != relevant))
 			return 0;

 		return 1;
 	}
 }

 /**
  * Split source register access.
  *
  * The only thing we *cannot* do in an ALU instruction is per-component
  * negation.
  */
 static void r500_swizzle_split(struct rc_src_register src, unsigned int usemask,
 		struct rc_swizzle_split * split)
 {
 	unsigned int negatebase[2] = { 0, 0 };
 	int i;

 	for(i = 0; i < 4; ++i) {
 		unsigned int swz = GET_SWZ(src.Swizzle, i);
 		if (swz == RC_SWIZZLE_UNUSED || !GET_BIT(usemask, i))
 			continue;
 		negatebase[GET_BIT(src.Negate, i)] |= 1 << i;
 	}

 	split->NumPhases = 0;

 	for(i = 0; i <= 1; ++i) {
 		if (!negatebase[i])
 			continue;

 		split->Phase[split->NumPhases++] = negatebase[i];
 	}
 }

 struct rc_swizzle_caps r500_swizzle_caps = {
 	.IsNative = r500_swizzle_is_native,
 	.Split = r500_swizzle_split
 };

 static char *toswiz(int swiz_val) {
   switch(swiz_val) {
   case 0: return "R";
   case 1: return "G";
   case 2: return "B";
   case 3: return "A";
   case 4: return "0";
   case 5: return "H";
   case 6: return "1";
   case 7: return "U";
   }
   return NULL;
 }

 static char *toop(int op_val)
 {
   char *str = NULL;
   switch (op_val) {
   case 0: str = "MAD"; break;
   case 1: str = "DP3"; break;
   case 2: str = "DP4"; break;
   case 3: str = "D2A"; break;
   case 4: str = "MIN"; break;
   case 5: str = "MAX"; break;
   case 6: str = "Reserved"; break;
   case 7: str = "CND"; break;
   case 8: str = "CMP"; break;
   case 9: str = "FRC"; break;
   case 10: str = "SOP"; break;
   case 11: str = "MDH"; break;
   case 12: str = "MDV"; break;
   }
   return str;
 }

 static char *to_alpha_op(int op_val)
 {
   char *str = NULL;
   switch (op_val) {
   case 0: str = "MAD"; break;
   case 1: str = "DP"; break;
   case 2: str = "MIN"; break;
   case 3: str = "MAX"; break;
   case 4: str = "Reserved"; break;
   case 5: str = "CND"; break;
   case 6: str = "CMP"; break;
   case 7: str = "FRC"; break;
   case 8: str = "EX2"; break;
   case 9: str = "LN2"; break;
   case 10: str = "RCP"; break;
   case 11: str = "RSQ"; break;
   case 12: str = "SIN"; break;
   case 13: str = "COS"; break;
   case 14: str = "MDH"; break;
   case 15: str = "MDV"; break;
   }
   return str;
 }

 static char *to_mask(int val)
 {
   char *str = NULL;
   switch(val) {
   case 0: str = "NONE"; break;
   case 1: str = "R"; break;
   case 2: str = "G"; break;
   case 3: str = "RG"; break;
   case 4: str = "B"; break;
   case 5: str = "RB"; break;
   case 6: str = "GB"; break;
   case 7: str = "RGB"; break;
   case 8: str = "A"; break;
   case 9: str = "AR"; break;
   case 10: str = "AG"; break;
   case 11: str = "ARG"; break;
   case 12: str = "AB"; break;
   case 13: str = "ARB"; break;
   case 14: str = "AGB"; break;
   case 15: str = "ARGB"; break;
   }
   return str;
 }

 static char *to_texop(int val)
 {
   switch(val) {
   case 0: return "NOP";
   case 1: return "LD";
   case 2: return "TEXKILL";
   case 3: return "PROJ";
   case 4: return "LODBIAS";
   case 5: return "LOD";
   case 6: return "DXDY";
   }
   return NULL;
 }

 void r500FragmentProgramDump(struct radeon_compiler *c, void *user)
 {
   struct r300_fragment_program_compiler *compiler = (struct r300_fragment_program_compiler*)c;
   struct r500_fragment_program_code *code = &compiler->code->code.r500;
   int n, i;
   uint32_t inst;
   uint32_t inst0;
   char *str = NULL;
   fprintf(stderr, "R500 Fragment Program:\n--------\n");

   for (n = 0; n < code->inst_end+1; n++) {
     inst0 = inst = code->inst[n].inst0;
     fprintf(stderr,"%d\t0:CMN_INST   0x%08x:", n, inst);
     switch(inst & 0x3) {
     case R500_INST_TYPE_ALU: str = "ALU"; break;
     case R500_INST_TYPE_OUT: str = "OUT"; break;
     case R500_INST_TYPE_FC: str = "FC"; break;
     case R500_INST_TYPE_TEX: str = "TEX"; break;
     };
     fprintf(stderr,"%s %s %s %s %s ", str,
 	    inst & R500_INST_TEX_SEM_WAIT ? "TEX_WAIT" : "",
 	    inst & R500_INST_LAST ? "LAST" : "",
 	    inst & R500_INST_NOP ? "NOP" : "",
 	    inst & R500_INST_ALU_WAIT ? "ALU WAIT" : "");
     fprintf(stderr,"wmask: %s omask: %s\n", to_mask((inst >> 11) & 0xf),
 	    to_mask((inst >> 15) & 0xf));

     switch(inst0 & 0x3) {
     case R500_INST_TYPE_ALU:
     case R500_INST_TYPE_OUT:
       fprintf(stderr,"\t1:RGB_ADDR   0x%08x:", code->inst[n].inst1);
       inst = code->inst[n].inst1;

       fprintf(stderr,"Addr0: %d%c, Addr1: %d%c, Addr2: %d%c, srcp:%d\n",
 	      inst & 0xff, (inst & (1<<8)) ? 'c' : 't',
 	      (inst >> 10) & 0xff, (inst & (1<<18)) ? 'c' : 't',
 	      (inst >> 20) & 0xff, (inst & (1<<28)) ? 'c' : 't',
 	      (inst >> 30));

       fprintf(stderr,"\t2:ALPHA_ADDR 0x%08x:", code->inst[n].inst2);
       inst = code->inst[n].inst2;
       fprintf(stderr,"Addr0: %d%c, Addr1: %d%c, Addr2: %d%c, srcp:%d\n",
 	      inst & 0xff, (inst & (1<<8)) ? 'c' : 't',
 	      (inst >> 10) & 0xff, (inst & (1<<18)) ? 'c' : 't',
 	      (inst >> 20) & 0xff, (inst & (1<<28)) ? 'c' : 't',
 	      (inst >> 30));
       fprintf(stderr,"\t3 RGB_INST:  0x%08x:", code->inst[n].inst3);
       inst = code->inst[n].inst3;
       fprintf(stderr,"rgb_A_src:%d %s/%s/%s %d rgb_B_src:%d %s/%s/%s %d targ: %d\n",
 	      (inst) & 0x3, toswiz((inst >> 2) & 0x7), toswiz((inst >> 5) & 0x7), toswiz((inst >> 8) & 0x7),
 	      (inst >> 11) & 0x3,
 	      (inst >> 13) & 0x3, toswiz((inst >> 15) & 0x7), toswiz((inst >> 18) & 0x7), toswiz((inst >> 21) & 0x7),
 	      (inst >> 24) & 0x3, (inst >> 29) & 0x3);


       fprintf(stderr,"\t4 ALPHA_INST:0x%08x:", code->inst[n].inst4);
       inst = code->inst[n].inst4;
       fprintf(stderr,"%s dest:%d%s alp_A_src:%d %s %d alp_B_src:%d %s %d targ %d w:%d\n", to_alpha_op(inst & 0xf),
 	      (inst >> 4) & 0x7f, inst & (1<<11) ? "(rel)":"",
 	      (inst >> 12) & 0x3, toswiz((inst >> 14) & 0x7), (inst >> 17) & 0x3,
 	      (inst >> 19) & 0x3, toswiz((inst >> 21) & 0x7), (inst >> 24) & 0x3,
 	      (inst >> 29) & 0x3,
 	      (inst >> 31) & 0x1);

       fprintf(stderr,"\t5 RGBA_INST: 0x%08x:", code->inst[n].inst5);
       inst = code->inst[n].inst5;
       fprintf(stderr,"%s dest:%d%s rgb_C_src:%d %s/%s/%s %d alp_C_src:%d %s %d\n", toop(inst & 0xf),
 	      (inst >> 4) & 0x7f, inst & (1<<11) ? "(rel)":"",
 	      (inst >> 12) & 0x3, toswiz((inst >> 14) & 0x7), toswiz((inst >> 17) & 0x7), toswiz((inst >> 20) & 0x7),
 	      (inst >> 23) & 0x3,
 	      (inst >> 25) & 0x3, toswiz((inst >> 27) & 0x7), (inst >> 30) & 0x3);
       break;
     case R500_INST_TYPE_FC:
       fprintf(stderr, "\t2:FC_INST    0x%08x:", code->inst[n].inst2);
       inst = code->inst[n].inst2;
       /* JUMP_FUNC JUMP_ANY*/
       fprintf(stderr, "0x%02x %1x ", inst >> 8 & 0xff,
           (inst & R500_FC_JUMP_ANY) >> 5);

       /* OP */
       switch(inst & 0x7){
       case R500_FC_OP_JUMP:
       	fprintf(stderr, "JUMP");
         break;
       case R500_FC_OP_LOOP:
         fprintf(stderr, "LOOP");
         break;
       case R500_FC_OP_ENDLOOP:
         fprintf(stderr, "ENDLOOP");
         break;
       case R500_FC_OP_REP:
         fprintf(stderr, "REP");
         break;
       case R500_FC_OP_ENDREP:
         fprintf(stderr, "ENDREP");
         break;
       case R500_FC_OP_BREAKLOOP:
         fprintf(stderr, "BREAKLOOP");
         break;
       case R500_FC_OP_BREAKREP:
         fprintf(stderr, "BREAKREP");
 	break;
       case R500_FC_OP_CONTINUE:
         fprintf(stderr, "CONTINUE");
         break;
       }
       fprintf(stderr," ");
       /* A_OP */
       switch(inst & (0x3 << 6)){
       case R500_FC_A_OP_NONE:
         fprintf(stderr, "NONE");
         break;
       case R500_FC_A_OP_POP:
 	fprintf(stderr, "POP");
         break;
       case R500_FC_A_OP_PUSH:
         fprintf(stderr, "PUSH");
         break;
       }
       /* B_OP0 B_OP1 */
       for(i=0; i<2; i++){
         fprintf(stderr, " ");
         switch(inst & (0x3 << (24 + (i * 2)))){
         /* R500_FC_B_OP0_NONE
 	 * R500_FC_B_OP1_NONE */
 	case 0:
           fprintf(stderr, "NONE");
           break;
         case R500_FC_B_OP0_DECR:
         case R500_FC_B_OP1_DECR:
           fprintf(stderr, "DECR");
           break;
         case R500_FC_B_OP0_INCR:
         case R500_FC_B_OP1_INCR:
           fprintf(stderr, "INCR");
           break;
         }
       }
       /*POP_CNT B_ELSE */
       fprintf(stderr, " %d %1x", (inst >> 16) & 0x1f, (inst & R500_FC_B_ELSE) >> 4);
       inst = code->inst[n].inst3;
       /* JUMP_ADDR */
       fprintf(stderr, " %d", inst >> 16);

       if(code->inst[n].inst2 & R500_FC_IGNORE_UNCOVERED){
         fprintf(stderr, " IGN_UNC");
       }
       inst = code->inst[n].inst3;
       fprintf(stderr, "\n\t3:FC_ADDR    0x%08x:", inst);
       fprintf(stderr, "BOOL: 0x%02x, INT: 0x%02x, JUMP_ADDR: %d, JMP_GLBL: %1x\n",
       inst & 0x1f, (inst >> 8) & 0x1f, (inst >> 16) & 0x1ff, inst >> 31);
       break;
     case R500_INST_TYPE_TEX:
       inst = code->inst[n].inst1;
       fprintf(stderr,"\t1:TEX_INST:  0x%08x: id: %d op:%s, %s, %s %s\n", inst, (inst >> 16) & 0xf,
 	      to_texop((inst >> 22) & 0x7), (inst & (1<<25)) ? "ACQ" : "",
 	      (inst & (1<<26)) ? "IGNUNC" : "", (inst & (1<<27)) ? "UNSCALED" : "SCALED");
       inst = code->inst[n].inst2;
       fprintf(stderr,"\t2:TEX_ADDR:  0x%08x: src: %d%s %s/%s/%s/%s dst: %d%s %s/%s/%s/%s\n", inst,
 	      inst & 127, inst & (1<<7) ? "(rel)" : "",
 	      toswiz((inst >> 8) & 0x3), toswiz((inst >> 10) & 0x3),
 	      toswiz((inst >> 12) & 0x3), toswiz((inst >> 14) & 0x3),
 	      (inst >> 16) & 127, inst & (1<<23) ? "(rel)" : "",
 	      toswiz((inst >> 24) & 0x3), toswiz((inst >> 26) & 0x3),
 	      toswiz((inst >> 28) & 0x3), toswiz((inst >> 30) & 0x3));

       fprintf(stderr,"\t3:TEX_DXDY:  0x%08x\n", code->inst[n].inst3);
       break;
     }
     fprintf(stderr,"\n");
   }

 }
	/*
	* Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
	*
	* 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 "r500_fragprog.h"

	#include <stdio.h>

	#include "radeon_compiler_util.h"
	#include "radeon_list.h"
	#include "radeon_variable.h"
	#include "../r300_reg.h"

	/**
	* Rewrite IF instructions to use the ALU result special register.
	*/
	int r500_transform_IF(
	struct radeon_compiler * c,
	struct rc_instruction * inst_if,
	void *data)
	{
	struct rc_variable * writer;
	struct rc_list * writer_list, * list_ptr;
	struct rc_list * var_list = rc_get_variables(c);
	unsigned int generic_if = 0;
	unsigned int alu_chan;

	if (inst_if->U.I.Opcode != RC_OPCODE_IF) {
	return 0;
	}

	writer_list = rc_variable_list_get_writers(
	var_list, inst_if->Type, &inst_if->U.I.SrcReg[0]);
	if (!writer_list) {
	generic_if = 1;
	} else {

	/* Make sure it is safe for the writers to write to
	* ALU Result */
	for (list_ptr = writer_list; list_ptr;
	list_ptr = list_ptr->Next) {
	struct rc_instruction * inst;
	writer = list_ptr->Item;
	/* We are going to modify the destination register
	* of writer, so if it has a reader other than
	* inst_if (aka ReaderCount > 1) we must fall back to
	* our generic IF.
	* If the writer has a lower IP than inst_if, this
	* means that inst_if is above the writer in a loop.
	* I'm not sure why this would ever happen, but
	* if it does we want to make sure we fall back
	* to our generic IF. */
	if (writer->ReaderCount > 1 \|\| writer->Inst->IP < inst_if->IP) {
	generic_if = 1;
	break;
	}

	/* The ALU Result is not preserved across IF
	* instructions, so if there is another IF
	* instruction between writer and inst_if, then
	* we need to fall back to generic IF. */
	for (inst = writer->Inst; inst != inst_if; inst = inst->Next) {
	const struct rc_opcode_info * info =
	rc_get_opcode_info(inst->U.I.Opcode);
	if (info->IsFlowControl) {
	generic_if = 1;
	break;
	}
	}
	if (generic_if) {
	break;
	}
	}
	}

	if (GET_SWZ(inst_if->U.I.SrcReg[0].Swizzle, 0) == RC_SWIZZLE_X) {
	alu_chan = RC_ALURESULT_X;
	} else {
	alu_chan = RC_ALURESULT_W;
	}
	if (generic_if) {
	struct rc_instruction * inst_mov =
	rc_insert_new_instruction(c, inst_if->Prev);

	inst_mov->U.I.Opcode = RC_OPCODE_MOV;
	inst_mov->U.I.DstReg.WriteMask = 0;
	inst_mov->U.I.DstReg.File = RC_FILE_NONE;
	inst_mov->U.I.ALUResultCompare = RC_COMPARE_FUNC_NOTEQUAL;
	inst_mov->U.I.WriteALUResult = alu_chan;
	inst_mov->U.I.SrcReg[0] = inst_if->U.I.SrcReg[0];
	if (alu_chan == RC_ALURESULT_X) {
	inst_mov->U.I.SrcReg[0].Swizzle = combine_swizzles4(
	inst_mov->U.I.SrcReg[0].Swizzle,
	RC_SWIZZLE_X, RC_SWIZZLE_UNUSED,
	RC_SWIZZLE_UNUSED, RC_SWIZZLE_UNUSED);
	} else {
	inst_mov->U.I.SrcReg[0].Swizzle = combine_swizzles4(
	inst_mov->U.I.SrcReg[0].Swizzle,
	RC_SWIZZLE_UNUSED, RC_SWIZZLE_UNUSED,
	RC_SWIZZLE_UNUSED, RC_SWIZZLE_Z);
	}
	} else {
	rc_compare_func compare_func = RC_COMPARE_FUNC_NEVER;
	unsigned int reverse_srcs = 0;
	unsigned int preserve_opcode = 0;
	for (list_ptr = writer_list; list_ptr;
	list_ptr = list_ptr->Next) {
	writer = list_ptr->Item;
	switch(writer->Inst->U.I.Opcode) {
	case RC_OPCODE_SEQ:
	compare_func = RC_COMPARE_FUNC_EQUAL;
	break;
	case RC_OPCODE_SNE:
	compare_func = RC_COMPARE_FUNC_NOTEQUAL;
	break;
	case RC_OPCODE_SLE:
	reverse_srcs = 1;
	/* Fall through */
	case RC_OPCODE_SGE:
	compare_func = RC_COMPARE_FUNC_GEQUAL;
	break;
	case RC_OPCODE_SGT:
	reverse_srcs = 1;
	/* Fall through */
	case RC_OPCODE_SLT:
	compare_func = RC_COMPARE_FUNC_LESS;
	break;
	default:
	compare_func = RC_COMPARE_FUNC_NOTEQUAL;
	preserve_opcode = 1;
	break;
	}
	if (!preserve_opcode) {
	writer->Inst->U.I.Opcode = RC_OPCODE_SUB;
	}
	writer->Inst->U.I.DstReg.WriteMask = 0;
	writer->Inst->U.I.DstReg.File = RC_FILE_NONE;
	writer->Inst->U.I.WriteALUResult = alu_chan;
	writer->Inst->U.I.ALUResultCompare = compare_func;
	if (reverse_srcs) {
	struct rc_src_register temp_src;
	temp_src = writer->Inst->U.I.SrcReg[0];
	writer->Inst->U.I.SrcReg[0] =
	writer->Inst->U.I.SrcReg[1];
	writer->Inst->U.I.SrcReg[1] = temp_src;
	}
	}
	}

	inst_if->U.I.SrcReg[0].File = RC_FILE_SPECIAL;
	inst_if->U.I.SrcReg[0].Index = RC_SPECIAL_ALU_RESULT;
	inst_if->U.I.SrcReg[0].Swizzle = RC_MAKE_SWIZZLE(
	RC_SWIZZLE_X, RC_SWIZZLE_UNUSED,
	RC_SWIZZLE_UNUSED, RC_SWIZZLE_UNUSED);
	inst_if->U.I.SrcReg[0].Negate = 0;

	return 1;
	}

	static int r500_swizzle_is_native(rc_opcode opcode, struct rc_src_register reg)
	{
	unsigned int relevant;
	int i;

	if (opcode == RC_OPCODE_TEX \|\|
	opcode == RC_OPCODE_TXB \|\|
	opcode == RC_OPCODE_TXP \|\|
	opcode == RC_OPCODE_TXD \|\|
	opcode == RC_OPCODE_TXL \|\|
	opcode == RC_OPCODE_KIL) {
	if (reg.Abs)
	return 0;

	if (opcode == RC_OPCODE_KIL && (reg.Swizzle != RC_SWIZZLE_XYZW \|\| reg.Negate != RC_MASK_NONE))
	return 0;

	for(i = 0; i < 4; ++i) {
	unsigned int swz = GET_SWZ(reg.Swizzle, i);
	if (swz == RC_SWIZZLE_UNUSED) {
	reg.Negate &= ~(1 << i);
	continue;
	}
	if (swz >= 4)
	return 0;
	}

	if (reg.Negate)
	return 0;

	return 1;
	} else if (opcode == RC_OPCODE_DDX \|\| opcode == RC_OPCODE_DDY) {
	/* DDX/MDH and DDY/MDV explicitly ignore incoming swizzles;
	* if it doesn't fit perfectly into a .xyzw case... */
	if (reg.Swizzle == RC_SWIZZLE_XYZW && !reg.Abs && !reg.Negate)
	return 1;

	return 0;
	} else if (reg.File == RC_FILE_INLINE) {
	return 1;
	} else {
	/* ALU instructions support almost everything */
	relevant = 0;
	for(i = 0; i < 3; ++i) {
	unsigned int swz = GET_SWZ(reg.Swizzle, i);
	if (swz != RC_SWIZZLE_UNUSED && swz != RC_SWIZZLE_ZERO)
	relevant \|= 1 << i;
	}
	if ((reg.Negate & relevant) && ((reg.Negate & relevant) != relevant))
	return 0;

	return 1;
	}
	}

	/**
	* Split source register access.
	*
	* The only thing we cannot do in an ALU instruction is per-component
	* negation.
	*/
	static void r500_swizzle_split(struct rc_src_register src, unsigned int usemask,
	struct rc_swizzle_split * split)
	{
	unsigned int negatebase[2] = { 0, 0 };
	int i;

	for(i = 0; i < 4; ++i) {
	unsigned int swz = GET_SWZ(src.Swizzle, i);
	if (swz == RC_SWIZZLE_UNUSED \|\| !GET_BIT(usemask, i))
	continue;
	negatebase[GET_BIT(src.Negate, i)] \|= 1 << i;
	}

	split->NumPhases = 0;

	for(i = 0; i <= 1; ++i) {
	if (!negatebase[i])
	continue;

	split->Phase[split->NumPhases++] = negatebase[i];
	}
	}

	struct rc_swizzle_caps r500_swizzle_caps = {
	.IsNative = r500_swizzle_is_native,
	.Split = r500_swizzle_split
	};

	static char *toswiz(int swiz_val) {
	switch(swiz_val) {
	case 0: return "R";
	case 1: return "G";
	case 2: return "B";
	case 3: return "A";
	case 4: return "0";
	case 5: return "H";
	case 6: return "1";
	case 7: return "U";
	}
	return NULL;
	}

	static char *toop(int op_val)
	{
	char *str = NULL;
	switch (op_val) {
	case 0: str = "MAD"; break;
	case 1: str = "DP3"; break;
	case 2: str = "DP4"; break;
	case 3: str = "D2A"; break;
	case 4: str = "MIN"; break;
	case 5: str = "MAX"; break;
	case 6: str = "Reserved"; break;
	case 7: str = "CND"; break;
	case 8: str = "CMP"; break;
	case 9: str = "FRC"; break;
	case 10: str = "SOP"; break;
	case 11: str = "MDH"; break;
	case 12: str = "MDV"; break;
	}
	return str;
	}

	static char *to_alpha_op(int op_val)
	{
	char *str = NULL;
	switch (op_val) {
	case 0: str = "MAD"; break;
	case 1: str = "DP"; break;
	case 2: str = "MIN"; break;
	case 3: str = "MAX"; break;
	case 4: str = "Reserved"; break;
	case 5: str = "CND"; break;
	case 6: str = "CMP"; break;
	case 7: str = "FRC"; break;
	case 8: str = "EX2"; break;
	case 9: str = "LN2"; break;
	case 10: str = "RCP"; break;
	case 11: str = "RSQ"; break;
	case 12: str = "SIN"; break;
	case 13: str = "COS"; break;
	case 14: str = "MDH"; break;
	case 15: str = "MDV"; break;
	}
	return str;
	}

	static char *to_mask(int val)
	{
	char *str = NULL;
	switch(val) {
	case 0: str = "NONE"; break;
	case 1: str = "R"; break;
	case 2: str = "G"; break;
	case 3: str = "RG"; break;
	case 4: str = "B"; break;
	case 5: str = "RB"; break;
	case 6: str = "GB"; break;
	case 7: str = "RGB"; break;
	case 8: str = "A"; break;
	case 9: str = "AR"; break;
	case 10: str = "AG"; break;
	case 11: str = "ARG"; break;
	case 12: str = "AB"; break;
	case 13: str = "ARB"; break;
	case 14: str = "AGB"; break;
	case 15: str = "ARGB"; break;
	}
	return str;
	}

	static char *to_texop(int val)
	{
	switch(val) {
	case 0: return "NOP";
	case 1: return "LD";
	case 2: return "TEXKILL";
	case 3: return "PROJ";
	case 4: return "LODBIAS";
	case 5: return "LOD";
	case 6: return "DXDY";
	}
	return NULL;
	}

	void r500FragmentProgramDump(struct radeon_compiler c, void user)
	{
	struct r300_fragment_program_compiler compiler = (struct r300_fragment_program_compiler)c;
	struct r500_fragment_program_code *code = &compiler->code->code.r500;
	int n, i;
	uint32_t inst;
	uint32_t inst0;
	char *str = NULL;
	fprintf(stderr, "R500 Fragment Program:\n--------\n");

	for (n = 0; n < code->inst_end+1; n++) {
	inst0 = inst = code->inst[n].inst0;
	fprintf(stderr,"%d\t0:CMN_INST 0x%08x:", n, inst);
	switch(inst & 0x3) {
	case R500_INST_TYPE_ALU: str = "ALU"; break;
	case R500_INST_TYPE_OUT: str = "OUT"; break;
	case R500_INST_TYPE_FC: str = "FC"; break;
	case R500_INST_TYPE_TEX: str = "TEX"; break;
	};
	fprintf(stderr,"%s %s %s %s %s ", str,
	inst & R500_INST_TEX_SEM_WAIT ? "TEX_WAIT" : "",
	inst & R500_INST_LAST ? "LAST" : "",
	inst & R500_INST_NOP ? "NOP" : "",
	inst & R500_INST_ALU_WAIT ? "ALU WAIT" : "");
	fprintf(stderr,"wmask: %s omask: %s\n", to_mask((inst >> 11) & 0xf),
	to_mask((inst >> 15) & 0xf));

	switch(inst0 & 0x3) {
	case R500_INST_TYPE_ALU:
	case R500_INST_TYPE_OUT:
	fprintf(stderr,"\t1:RGB_ADDR 0x%08x:", code->inst[n].inst1);
	inst = code->inst[n].inst1;

	fprintf(stderr,"Addr0: %d%c, Addr1: %d%c, Addr2: %d%c, srcp:%d\n",
	inst & 0xff, (inst & (1<<8)) ? 'c' : 't',
	(inst >> 10) & 0xff, (inst & (1<<18)) ? 'c' : 't',
	(inst >> 20) & 0xff, (inst & (1<<28)) ? 'c' : 't',
	(inst >> 30));

	fprintf(stderr,"\t2:ALPHA_ADDR 0x%08x:", code->inst[n].inst2);
	inst = code->inst[n].inst2;
	fprintf(stderr,"Addr0: %d%c, Addr1: %d%c, Addr2: %d%c, srcp:%d\n",
	inst & 0xff, (inst & (1<<8)) ? 'c' : 't',
	(inst >> 10) & 0xff, (inst & (1<<18)) ? 'c' : 't',
	(inst >> 20) & 0xff, (inst & (1<<28)) ? 'c' : 't',
	(inst >> 30));
	fprintf(stderr,"\t3 RGB_INST: 0x%08x:", code->inst[n].inst3);
	inst = code->inst[n].inst3;
	fprintf(stderr,"rgb_A_src:%d %s/%s/%s %d rgb_B_src:%d %s/%s/%s %d targ: %d\n",
	(inst) & 0x3, toswiz((inst >> 2) & 0x7), toswiz((inst >> 5) & 0x7), toswiz((inst >> 8) & 0x7),
	(inst >> 11) & 0x3,
	(inst >> 13) & 0x3, toswiz((inst >> 15) & 0x7), toswiz((inst >> 18) & 0x7), toswiz((inst >> 21) & 0x7),
	(inst >> 24) & 0x3, (inst >> 29) & 0x3);


	fprintf(stderr,"\t4 ALPHA_INST:0x%08x:", code->inst[n].inst4);
	inst = code->inst[n].inst4;
	fprintf(stderr,"%s dest:%d%s alp_A_src:%d %s %d alp_B_src:%d %s %d targ %d w:%d\n", to_alpha_op(inst & 0xf),
	(inst >> 4) & 0x7f, inst & (1<<11) ? "(rel)":"",
	(inst >> 12) & 0x3, toswiz((inst >> 14) & 0x7), (inst >> 17) & 0x3,
	(inst >> 19) & 0x3, toswiz((inst >> 21) & 0x7), (inst >> 24) & 0x3,
	(inst >> 29) & 0x3,
	(inst >> 31) & 0x1);

	fprintf(stderr,"\t5 RGBA_INST: 0x%08x:", code->inst[n].inst5);
	inst = code->inst[n].inst5;
	fprintf(stderr,"%s dest:%d%s rgb_C_src:%d %s/%s/%s %d alp_C_src:%d %s %d\n", toop(inst & 0xf),
	(inst >> 4) & 0x7f, inst & (1<<11) ? "(rel)":"",
	(inst >> 12) & 0x3, toswiz((inst >> 14) & 0x7), toswiz((inst >> 17) & 0x7), toswiz((inst >> 20) & 0x7),
	(inst >> 23) & 0x3,
	(inst >> 25) & 0x3, toswiz((inst >> 27) & 0x7), (inst >> 30) & 0x3);
	break;
	case R500_INST_TYPE_FC:
	fprintf(stderr, "\t2:FC_INST 0x%08x:", code->inst[n].inst2);
	inst = code->inst[n].inst2;
	/* JUMP_FUNC JUMP_ANY*/
	fprintf(stderr, "0x%02x %1x ", inst >> 8 & 0xff,
	(inst & R500_FC_JUMP_ANY) >> 5);

	/* OP */
	switch(inst & 0x7){
	case R500_FC_OP_JUMP:
	fprintf(stderr, "JUMP");
	break;
	case R500_FC_OP_LOOP:
	fprintf(stderr, "LOOP");
	break;
	case R500_FC_OP_ENDLOOP:
	fprintf(stderr, "ENDLOOP");
	break;
	case R500_FC_OP_REP:
	fprintf(stderr, "REP");
	break;
	case R500_FC_OP_ENDREP:
	fprintf(stderr, "ENDREP");
	break;
	case R500_FC_OP_BREAKLOOP:
	fprintf(stderr, "BREAKLOOP");
	break;
	case R500_FC_OP_BREAKREP:
	fprintf(stderr, "BREAKREP");
	break;
	case R500_FC_OP_CONTINUE:
	fprintf(stderr, "CONTINUE");
	break;
	}
	fprintf(stderr," ");
	/* A_OP */
	switch(inst & (0x3 << 6)){
	case R500_FC_A_OP_NONE:
	fprintf(stderr, "NONE");
	break;
	case R500_FC_A_OP_POP:
	fprintf(stderr, "POP");
	break;
	case R500_FC_A_OP_PUSH:
	fprintf(stderr, "PUSH");
	break;
	}
	/* B_OP0 B_OP1 */
	for(i=0; i<2; i++){
	fprintf(stderr, " ");
	switch(inst & (0x3 << (24 + (i * 2)))){
	/* R500_FC_B_OP0_NONE
	* R500_FC_B_OP1_NONE */
	case 0:
	fprintf(stderr, "NONE");
	break;
	case R500_FC_B_OP0_DECR:
	case R500_FC_B_OP1_DECR:
	fprintf(stderr, "DECR");
	break;
	case R500_FC_B_OP0_INCR:
	case R500_FC_B_OP1_INCR:
	fprintf(stderr, "INCR");
	break;
	}
	}
	/POP_CNT B_ELSE /
	fprintf(stderr, " %d %1x", (inst >> 16) & 0x1f, (inst & R500_FC_B_ELSE) >> 4);
	inst = code->inst[n].inst3;
	/* JUMP_ADDR */
	fprintf(stderr, " %d", inst >> 16);

	if(code->inst[n].inst2 & R500_FC_IGNORE_UNCOVERED){
	fprintf(stderr, " IGN_UNC");
	}
	inst = code->inst[n].inst3;
	fprintf(stderr, "\n\t3:FC_ADDR 0x%08x:", inst);
	fprintf(stderr, "BOOL: 0x%02x, INT: 0x%02x, JUMP_ADDR: %d, JMP_GLBL: %1x\n",
	inst & 0x1f, (inst >> 8) & 0x1f, (inst >> 16) & 0x1ff, inst >> 31);
	break;
	case R500_INST_TYPE_TEX:
	inst = code->inst[n].inst1;
	fprintf(stderr,"\t1:TEX_INST: 0x%08x: id: %d op:%s, %s, %s %s\n", inst, (inst >> 16) & 0xf,
	to_texop((inst >> 22) & 0x7), (inst & (1<<25)) ? "ACQ" : "",
	(inst & (1<<26)) ? "IGNUNC" : "", (inst & (1<<27)) ? "UNSCALED" : "SCALED");
	inst = code->inst[n].inst2;
	fprintf(stderr,"\t2:TEX_ADDR: 0x%08x: src: %d%s %s/%s/%s/%s dst: %d%s %s/%s/%s/%s\n", inst,
	inst & 127, inst & (1<<7) ? "(rel)" : "",
	toswiz((inst >> 8) & 0x3), toswiz((inst >> 10) & 0x3),
	toswiz((inst >> 12) & 0x3), toswiz((inst >> 14) & 0x3),
	(inst >> 16) & 127, inst & (1<<23) ? "(rel)" : "",
	toswiz((inst >> 24) & 0x3), toswiz((inst >> 26) & 0x3),
	toswiz((inst >> 28) & 0x3), toswiz((inst >> 30) & 0x3));

	fprintf(stderr,"\t3:TEX_DXDY: 0x%08x\n", code->inst[n].inst3);
	break;
	}
	fprintf(stderr,"\n");
	}

	}