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/* verilog.c -- OpenRISC Custom Unit Compiler, verilog generator * Copyright (C) 2002 Marko Mlinar, markom@opencores.org * * This file is part of OpenRISC 1000 Architectural Simulator. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <stdio.h> #include <stdlib.h> #include <stdarg.h> #include <assert.h> #include "cuc.h" #include "insn.h" #include "profiler.h" /* Shortcut */ #define GEN(x...) fprintf (fo, x) /* Find index of load/store/call */ int find_lsc_index (cuc_func *f, int ref) { int c = 0; int i; int load; if (f->INSN(ref).index == II_CALL) { for (i = 0; i < f->nmsched; i++) { if (f->msched[i] == ref) break; if (f->mtype[i] & MT_CALL) c++; } } else { load = II_IS_LOAD (f->INSN(ref).index); for (i = 0; i < f->nmsched; i++) { if (f->msched[i] == ref) break; if (load && (f->mtype[i] & MT_LOAD) || !load && (f->mtype[i] & MT_STORE)) c++; } } return c; } /* Print out dependencies as verilog expression */ void print_deps (FILE *fo, cuc_func *f, int b, dep_list *t, int registered) { if (t) { int first = 0; while (t) { if (f->INSN(t->ref).type & IT_MEMORY) { GEN ("%s%c_end[%i]", first ? " && " : "", II_IS_LOAD (f->INSN(t->ref).index) ? 'l' : 's', find_lsc_index (f, t->ref)); } else if (f->INSN(t->ref).index == II_CALL) { int x; GEN ("%sf_end[%i]", first ? " && " : "", find_lsc_index (f, t->ref)); } else { printf ("print_deps: err %x\n", t->ref); assert (0); } first = 1; t = t->next; } } else { if (registered) GEN ("bb_start_r[%i]", b); else GEN ("bb_start[%i]", b); } } char *print_op_v (cuc_func *f, char *s, int ref, int j) { unsigned long op = f->INSN(ref).op[j]; unsigned long opt = f->INSN(ref).opt[j]; switch (opt & ~OPT_DEST) { case OPT_NONE: assert (0); break; case OPT_CONST: if (f->INSN(ref).type & IT_COND && (f->INSN(ref).index == II_CMOV || f->INSN(ref).index == II_ADD)) { assert (op == 0 || op == 1); sprintf (s, "1'b%x", op); } else sprintf (s, "32'h%x", op); break; case OPT_REGISTER: if (opt & OPT_DEST) sprintf (s, "t%x_%x", REF_BB(ref), REF_I(ref)); else sprintf (s, "r%i_%c", op, opt & OPT_DEST ? 'o' : 'i'); break; #if 0 case OPT_FREG: assert (opt & OPT_DEST); sprintf (s, "fr%i_o", op); break; #endif case OPT_REF: sprintf (s, "t%x_%x", REF_BB(op), REF_I(op)); break; } return s; } /* Prints out specified instruction */ void print_insn_v (FILE *fo, cuc_func *f, int b, int i) { cuc_insn *ii = &f->bb[b].insn[i]; char *s = known[ii->index].rtl; char tmp[200] = ""; assert (s); while (*s) { if (*s <= MAX_OPERANDS) { char t[30]; sprintf (tmp, "%s%s", tmp, print_op_v (f, t, REF(b, i), *s - 1)); } else if (*s == '\b') sprintf (tmp, "%s%i", b); else sprintf (tmp, "%s%c", tmp, *s); s++; } GEN ("%-40s /* %s */\n", tmp, ii->disasm); if (ii->type & IT_MEMORY) { int j, nls = find_lsc_index (f, REF (b, i)); if (II_IS_LOAD (ii->index)) { int nm; for (nm = 0; nm < f->nmsched; nm++) if (f->msched[nm] == REF (b, i)) break; assert (nm < f->nmsched); GEN (" if (l_end[%i]) t%x_%x <= #Tp ", nls, b, i); switch (f->mtype[nm] & (MT_WIDTH | MT_SIGNED)) { case 1: GEN ("lwb_dat_i & 32'hff;\n"); break; case 2: GEN ("lwb_dat_i & 32'hffff;\n"); break; case 4 | MT_SIGNED: case 4: GEN ("lwb_dat_i;\n"); break; case 1 | MT_SIGNED: GEN ("{24{lwb_dat_i[7]}, lwb_dat_i[7:0]};\n"); break; case 2 | MT_SIGNED: GEN ("{16{lwb_dat_i[15]}, lwb_dat_i[15:0]};\n"); break; default: assert (0); } } } else if (ii->index == II_LRBB) { GEN (" if (rst) t%x_%x <= #Tp 1'b0;\n", b, i); assert (f->bb[b].prev[0] >= 0); if (f->bb[b].prev[0] == BBID_START) GEN (" else if (bb_start[%i]) t%x_%x <= #Tp start_i;\n", b, b, i); else GEN (" else if (bb_start[%i]) t%x_%x <= #Tp bb_stb[%i];\n", b, b, i, f->bb[b].prev[0]); } else if (ii->index == II_REG) { assert (ii->opt[1] == OPT_REF); GEN (" if ("); if (f->bb[b].mdep) print_deps (fo, f, b, f->bb[b].mdep, 0); else GEN ("bb_stb[%i]", b); GEN (") t%x_%x <= #Tp t%x_%x;\n", b, i, REF_BB (ii->op[1]), REF_I (ii->op[1])); } } /* Outputs binary number */ static char *bin_str (unsigned long x, int len) { static char bx[33]; char *s = bx; while (len > 0) *s++ = '0' + ((x >> --len) & 1); *s = '\0'; return bx; } /* Returns index of branch instruction inside a block b */ static int branch_index (cuc_bb *bb) { int i; for (i = bb->ninsn - 1; i >= 0; i--) if (bb->insn[i].type & IT_BRANCH) return i; return -1; } static void print_turn_off_dep (FILE *fo, cuc_func *f, dep_list *dep) { while (dep) { assert (f->INSN(dep->ref).type & IT_MEMORY || f->INSN(dep->ref).index == II_CALL); GEN (" %c_stb[%i] <= #Tp 1'b0;\n", f->INSN(dep->ref).index == II_CALL ? 'f' : II_IS_LOAD (f->INSN(dep->ref).index) ? 'l' : 's', find_lsc_index (f, dep->ref)); dep = dep->next; } } static int func_index (cuc_func *f, int ref) { int i; unsigned long addr; assert (f->INSN(ref).index == II_CALL && f->INSN(ref).opt[0] & OPT_CONST); addr = f->INSN(ref).op[0]; for (i = 0; i < f->nfdeps; i++) if (f->fdeps[i]->start_addr == addr) return i; assert (0); return -1; } /* Generates verilog file out of insn dataflow */ void output_verilog (cuc_func *f, char *filename) { FILE *fo; int b, i, j; int ci = 0, co = 0; int nloads = 0, nstores = 0, ncalls = 0; char tmp[256]; cuc_bb *end_bb = NULL; int end_bb_no = -1; sprintf (tmp, "%s.v", filename); log ("Generating verilog file \"%s\"\n", tmp); printf ("Generating verilog file \"%s\"\n", tmp); if ((fo = fopen (tmp, "wt+")) == NULL) { fprintf (stderr, "Cannot open '%s'\n", tmp); exit (1); } for (b = 0; b < f->num_bb; b++) if (f->bb[b].type & BB_END) end_bb = &f->bb[end_bb_no = b]; assert (end_bb && end_bb->type & BB_END); /* output header */ GEN ("/* %s -- generated by OpenRISC Custom Unit Compiler\n", tmp); GEN (" (C) 2002 OpenCores http://www.opencores.org/\n"); GEN (" function \"%s\"\n", filename); GEN (" at %08x - %08x\n", f->start_addr, f->end_addr); GEN (" num BBs %i */\n\n", f->num_bb); GEN ("module %s (clk, rst,\n", filename); GEN (" lwb_adr_o, lwb_dat_i, lwb_cycstb_o,\n"); GEN (" lwb_sel_o, lwb_linbrst_o, lwb_ack_i,\n"); GEN (" swb_adr_o, swb_dat_o, swb_cycstb_o,\n"); GEN (" swb_sel_o, swb_linbrst_o, swb_ack_i,\n"); GEN ("/* inputs */ "); for (i = 0; i < MAX_REGS; i++) if (f->used_regs[i]) { GEN ("r%i_i, ", i); ci++; } if (!ci) GEN ("/* NONE */"); GEN ("\n/* outputs */ "); for (i = 0; i < MAX_REGS; i++) if (f->lur[i] >= 0 && !f->saved_regs[i]) { GEN ("r%i_o, ", i); co++; } if (!co) GEN ("/* NONE */"); if (f->nfdeps) { GEN ("\n/* f. calls */, fstart_o, %sfend_i, fr11_i, ", log2 (f->nfdeps) > 0 ? "fid_o, " : ""); for (i = 0; i < 6; i++) GEN ("fr%i_o, ", i + 3); } GEN ("\n start_i, end_o, busy_o);\n\n"); GEN ("parameter Tp = 1;\n\n"); GEN ("input clk, rst;\n"); GEN ("input start_i;\t/* Module starts when set to 1 */ \n"); GEN ("output end_o;\t/* Set when module finishes, cleared upon start_i == 1 */\n"); GEN ("output busy_o;\t/* Set when module should not be interrupted */\n"); GEN ("\n/* Bus signals */\n"); GEN ("output lwb_cycstb_o, swb_cycstb_o;\n"); GEN ("input lwb_ack_i, swb_ack_i;\n"); GEN ("output [3:0] lwb_sel_o, swb_sel_o;\n"); GEN ("output [31:0] lwb_adr_o, swb_adr_o;\n"); GEN ("output lwb_linbrst_o, swb_linbrst_o;\n"); GEN ("input [31:0] lwb_dat_i;\n"); GEN ("output [31:0] swb_dat_o;\n\n"); GEN ("reg lwb_cycstb_o, swb_cycstb_o;\n"); GEN ("reg [31:0] lwb_adr_o, swb_adr_o;\n"); GEN ("reg [3:0] lwb_sel_o, swb_sel_o;\n"); GEN ("reg [31:0] swb_dat_o;\n"); GEN ("reg lwb_linbrst_o, swb_linbrst_o;\n"); if (ci || co) GEN ("\n/* module ports */\n"); if (ci) { int first = 1; GEN ("input [31:0]"); for (i = 0; i < MAX_REGS; i++) if (f->used_regs[i]) { GEN ("%sr%i_i", first ? " " : ", ", i); first = 0; } GEN (";\n"); } if (co) { int first = 1; GEN ("output [31:0]"); for (i = 0; i < MAX_REGS; i++) if (f->lur[i] >= 0 && !f->saved_regs[i]) { GEN ("%sr%i_o", first ? " " : ", ", i); first = 0; } GEN (";\n"); } if (f->nfdeps) { GEN ("\n/* Function calls */\n"); GEN ("output [31:0] fr3_o"); for (i = 1; i < 6; i++) GEN (", fr%i_o", i + 3); GEN (";\n"); GEN ("input [31:0] fr11_i;\n"); if (log2(f->nfdeps) > 0) GEN ("output [%i:0] fid_o;\n", log2(f->nfdeps)); GEN ("output fstart_o;\n"); GEN ("input fend_i;\n"); } /* Count loads & stores */ for (i = 0; i < f->nmsched; i++) if (f->mtype[i] & MT_STORE) nstores++; else if (f->mtype[i] & MT_LOAD) nloads++; else if (f->mtype[i] & MT_CALL) ncalls++; /* Output internal registers for loads */ if (nloads) { int first = 1; int num = 0; GEN ("\n/* internal registers for loads */\n"); for (i = 0; i < f->nmsched; i++) if (f->mtype[i] & MT_LOAD) { GEN ("%st%x_%x", first ? "reg [31:0] " : ", ", REF_BB(f->msched[i]), REF_I(f->msched[i])); if (num >= 8) { GEN (";\n"); first = 1; num = 0; } else { first = 0; num++; } } if (!first) GEN (";\n"); } /* Internal register for function return value */ if (f->nfdeps) { GEN ("\n/* Internal register for function return value */\n"); GEN ("reg [31:0] fr11_r;\n"); } GEN ("\n/* 'zero or one' hot state machines */\n"); if (nloads) GEN ("reg [%i:0] l_stb; /* loads */\n", nloads - 1); if (nstores) GEN ("reg [%i:0] s_stb; /* stores */\n", nstores - 1); GEN ("reg [%i:0] bb_stb; /* basic blocks */\n", f->num_bb - 1); { int first = 2; int num = 0; for (b = 0; b < f->num_bb; b++) for (i = 0; i < f->bb[b].ninsn; i++) if (f->bb[b].insn[i].type & IT_COND && f->bb[b].insn[i].index != II_REG && f->bb[b].insn[i].index != II_LRBB) { if (first == 2) GEN ("\n/* basic block condition wires */\n"); GEN ("%st%x_%x", first ? "wire " : ", ", b, i); if (num >= 8) { GEN (";\n"); first = 1; num = 0; } else { first = 0; num++; } } if (!first) GEN (";\n"); GEN ("\n/* forward declaration of normal wires */\n"); num = 0; first = 1; for (b = 0; b < f->num_bb; b++) for (i = 0; i < f->bb[b].ninsn; i++) if (!(f->bb[b].insn[i].type & (IT_COND | IT_BRANCH)) && f->bb[b].insn[i].index != II_REG && f->bb[b].insn[i].index != II_LRBB) { /* Exclude loads */ if (f->bb[b].insn[i].type & IT_MEMORY && II_IS_LOAD (f->bb[b].insn[i].index)) continue; GEN ("%st%x_%x", first ? "wire [31:0] " : ", ", b, i); if (num >= 8) { GEN (";\n"); first = 1; num = 0; } else { first = 0; num++; } } if (!first) GEN (";\n"); GEN ("\n/* forward declaration registers */\n"); num = 0; first = 1; for (b = 0; b < f->num_bb; b++) for (i = 0; i < f->bb[b].ninsn; i++) if (f->bb[b].insn[i].index == II_REG && f->bb[b].insn[i].index != II_LRBB) { GEN ("%st%x_%x", first ? "reg [31:0] " : ", ", b, i); if (num >= 8) { GEN (";\n"); first = 1; num = 0; } else { first = 0; num++; } } if (!first) GEN (";\n"); num = 0; first = 1; for (b = 0; b < f->num_bb; b++) for (i = 0; i < f->bb[b].ninsn; i++) if (f->bb[b].insn[i].index != II_REG && f->bb[b].insn[i].index == II_LRBB) { GEN ("%st%x_%x", first ? "reg " : ", ", b, i); if (num >= 8) { GEN (";\n"); first = 1; num = 0; } else { first = 0; num++; } } if (!first) GEN (";\n"); } if (nloads || nstores) GEN ("\n/* dependencies */\n"); if (nloads) GEN ("wire [%i:0] l_end = l_stb & {%i{lwb_ack_i}};\n", nloads - 1, nloads); if (nstores) GEN ("wire [%i:0] s_end = s_stb & {%i{swb_ack_i}};\n", nstores - 1, nstores); if (ncalls) GEN ("wire [%i:0] f_end = f_stb & {%i{fend_i}};\n", ncalls - 1, ncalls); GEN ("\n/* last dependency */\n"); GEN ("wire end_o = bb_stb[%i]", end_bb_no); if (end_bb->mdep) { GEN (" && "); print_deps (fo, f, end_bb_no, end_bb->mdep, 0); } /* Is there a loop right at the end? */ if (end_bb->next[0] != BBID_END || end_bb->next[1] != BBID_END && end_bb->next[1] >= 0) { int bidx = branch_index (end_bb); char t[30]; print_op_v (f, t, REF (end_bb_no, bidx), 1); GEN (" && !%s", t); } GEN (";\n"); GEN ("wire busy_o = |bb_stb;\n"); GEN ("\n/* Basic block triggers */\n"); GEN ("wire [%2i:0] bb_start = {\n", f->num_bb - 1); for (b = f->num_bb - 1; b >= 0; b--) { GEN (" /* bb_start[%2i] */ ", b); for (i = 0; i < 2; i++) if (f->bb[b].prev[i] >= 0 && f->bb[b].prev[i] != BBID_START) { cuc_bb *prev = &f->bb[f->bb[b].prev[i]]; int t; if (i) GEN ("\n || "); if (prev->mdep) { print_deps (fo, f, f->bb[b].prev[i], prev->mdep, 0); GEN (" && "); } GEN ("bb_stb[%i]", f->bb[b].prev[i]); if (prev->next[0] >= 0 && prev->next[0] != BBID_END && prev->next[1] >= 0 && prev->next[1] != BBID_END) { int bi = REF (f->bb[b].prev[i], branch_index (&f->bb[f->bb[b].prev[i]])); int ci; assert (bi >= 0); ci = f->INSN(bi).op[1]; t = prev->next[0] == b; GEN (" && "); if (f->INSN(bi).opt[1] & OPT_REF) { GEN ("%st%x_%x", t ? "" : "!", REF_BB(ci), REF_I(ci)); } else { fprintf (stderr, "%x!%x!%x\n", bi, ci, f->INSN(bi).opt[1]); assert (f->INSN(bi).opt[1] & OPT_CONST); GEN ("%s%i", t ? "" : "!", ci); } } } else break; if (!i) GEN ("start_i"); if (b == 0) GEN ("};\n"); else GEN (",\n"); } GEN ("\n/* Register the bb_start */\n"); GEN ("reg [%2i:0] bb_start_r;\n\n", f->num_bb - 1); GEN ("always @(posedge rst or posedge clk)\n"); GEN ("begin\n"); GEN (" if (rst) bb_start_r <= #Tp %i'b0;\n", f->num_bb); GEN (" else if (end_o) bb_start_r <= #Tp %i'b0;\n", f->num_bb); GEN (" else bb_start_r <= #Tp bb_start;\n"); GEN ("end\n"); GEN ("\n/* Logic */\n"); /* output body */ for (b = 0; b < f->num_bb; b++) { GEN ("\t\t/* BB%i */\n", b); for (i = 0; i < f->bb[b].ninsn; i++) print_insn_v (fo, f, b, i); GEN ("\n"); } if (co) { GEN ("\n/* Outputs */\n"); for (i = 0; i < MAX_REGS; i++) if (f->lur[i] >= 0 && !f->saved_regs[i]) GEN ("assign r%i_o = t%x_%x;\n", i, REF_BB(f->lur[i]), REF_I(f->lur[i])); } if (nstores) { int cur_store = 0; GEN ("\n/* Memory stores */\n"); GEN ("always @(posedge clk or posedge rst)\nbegin\n"); GEN (" if (rst) swb_dat_o <= #Tp 32'h0;\n"); for (i = 0; i < f->nmsched; i++) if (f->mtype[i] & MT_STORE) { char t[30]; GEN (" else if (s_stb[%i]) swb_dat_o <= #Tp %s;\n", cur_store++, print_op_v (f, t, f->msched[i], 0)); //printf ("msched[%i] = %x (mtype %x) %x\n", i, f->msched[i], f->mtype[i], f->INSN(f->msched[i]).op[0]); } GEN ("end\n"); } if (nloads) { int cur_load = 0; GEN ("\n/* Load state machine */\n"); GEN ("always @(posedge clk or posedge rst)\n"); GEN ("begin\n"); GEN (" if (rst) begin\n"); GEN (" l_stb <= #Tp %i'h0;\n", nloads); GEN (" lwb_cycstb_o <= #Tp 1'b0;\n"); GEN (" lwb_sel_o[3:0] <= #Tp 4'b0000;\n"); GEN (" lwb_linbrst_o <= #Tp 1'b0;\n"); GEN (" lwb_adr_o <= #Tp 32'h0;\n"); GEN (" end else begin\n"); cucdebug (1, "loads \n"); for (i = 0; i < f->nmsched; i++) if (f->mtype[i] & MT_LOAD) { char t[30]; dep_list *dep = f->INSN(f->msched[i]).dep; cucdebug (1, "msched[%i] = %x (mtype %x)\n", i, f->msched[i], f->mtype[i]); assert (f->INSN(f->msched[i]).opt[1] & (OPT_REF | OPT_REGISTER)); GEN (" if ("); print_deps (fo, f, REF_BB(f->msched[i]), f->INSN(f->msched[i]).dep, 1); GEN (") begin\n"); print_turn_off_dep (fo, f, dep); GEN (" l_stb[%i] <= #Tp 1'b1;\n", cur_load++); GEN (" lwb_cycstb_o <= #Tp 1'b1;\n"); GEN (" lwb_sel_o[3:0] <= #Tp 4'b"); switch (f->mtype[i] & MT_WIDTH) { case 1: GEN ("0001 << (%s & 32'h3);\n", print_op_v (f, t, f->msched[i], 1)); break; case 2: GEN ("0011 << ((%s & 32'h1) << 1);\n", print_op_v (f, t, f->msched[i], 1)); break; case 4: GEN ("1111;\n"); break; default: assert (0); } GEN (" lwb_linbrst_o <= #Tp 1'b%i;\n", (f->mtype[i] & MT_BURST) && !(f->mtype[i] & MT_BURSTE) ? 1 : 0); GEN (" lwb_adr_o <= #Tp t%x_%x & ~32'h3;\n", REF_BB(f->INSN(f->msched[i]).op[1]), REF_I(f->INSN(f->msched[i]).op[1])); GEN (" end\n"); } GEN (" if (l_end[%i]) begin\n", nloads - 1); GEN (" l_stb <= #Tp %i'h0;\n", nloads); GEN (" lwb_cycstb_o <= #Tp 1'b0;\n"); GEN (" lwb_sel_o[3:0] <= #Tp 4'b0000;\n"); GEN (" lwb_linbrst_o <= #Tp 1'b0;\n"); GEN (" lwb_adr_o <= #Tp 32'h0;\n"); GEN (" end\n"); GEN (" end\n"); GEN ("end\n"); } if (nstores) { int cur_store = 0; GEN ("\n/* Store state machine */\n"); GEN ("always @(posedge clk or posedge rst)\n"); GEN ("begin\n"); GEN (" if (rst) begin\n"); GEN (" s_stb <= #Tp %i'h0;\n", nstores); GEN (" swb_cycstb_o <= #Tp 1'b0;\n"); GEN (" swb_sel_o[3:0] <= #Tp 4'b0000;\n"); GEN (" swb_linbrst_o <= #Tp 1'b0;\n"); GEN (" swb_adr_o <= #Tp 32'h0;\n"); GEN (" end else begin\n"); cucdebug (1, "stores \n"); for (i = 0; i < f->nmsched; i++) if (f->mtype[i] & MT_STORE) { char t[30]; dep_list *dep = f->INSN(f->msched[i]).dep; cucdebug (1, "msched[%i] = %x (mtype %x)\n", i, f->msched[i], f->mtype[i]); assert (f->INSN(f->msched[i]).opt[1] & (OPT_REF | OPT_REGISTER)); GEN (" if ("); print_deps (fo, f, REF_BB(f->msched[i]), f->INSN(f->msched[i]).dep, 1); GEN (") begin\n"); print_turn_off_dep (fo, f, dep); GEN (" s_stb[%i] <= #Tp 1'b1;\n", cur_store++); GEN (" swb_cycstb_o <= #Tp 1'b1;\n"); GEN (" swb_sel_o[3:0] <= #Tp 4'b"); switch (f->mtype[i] & MT_WIDTH) { case 1: GEN ("0001 << (%s & 32'h3);\n", print_op_v (f, t, f->msched[i], 1)); break; case 2: GEN ("0011 << ((%s & 32'h1) << 1);\n", print_op_v (f, t, f->msched[i], 1)); break; case 4: GEN ("1111;\n"); break; default: assert (0); } GEN (" swb_linbrst_o <= #Tp 1'b%i;\n", (f->mtype[i] & MT_BURST) && !(f->mtype[i] & MT_BURSTE) ? 1 : 0); GEN (" swb_adr_o <= #Tp t%x_%x & ~32'h3;\n", REF_BB(f->INSN(f->msched[i]).op[1]), REF_I(f->INSN(f->msched[i]).op[1])); GEN (" end\n"); } GEN (" if (s_end[%i]) begin\n", nstores - 1); GEN (" s_stb <= #Tp %i'h0;\n", nstores); GEN (" swb_cycstb_o <= #Tp 1'b0;\n"); GEN (" swb_sel_o[3:0] <= #Tp 4'b0000;\n"); GEN (" swb_linbrst_o <= #Tp 1'b0;\n"); GEN (" swb_adr_o <= #Tp 32'h0;\n"); GEN (" end\n"); GEN (" end\n"); GEN ("end\n"); } if (ncalls) { int cur_call = 0; GEN ("\n/* Function calls state machine */\n"); GEN ("always @(posedge clk or posedge rst)\n"); GEN ("begin\n"); GEN (" if (rst) begin\n"); GEN (" f_stb <= #Tp %i'h0;\n", nstores); for (i = 0; i < 6; i++) GEN (" fr%i_o <= #Tp 32'h0;\n", i + 3); if (log2(ncalls)) GEN (" fid_o <= #Tp %i'h0;\n", log2 (f->nfdeps)); GEN (" fstart_o <= #Tp 1'b0;\n"); //GEN (" f11_r <= #Tp 32'h0;\n"); GEN (" end else begin\n"); cucdebug (1, "calls \n"); for (i = 0; i < f->nmsched; i++) if (f->mtype[i] & MT_CALL) { char t[30]; dep_list *dep = f->INSN(f->msched[i]).dep; cucdebug (1, "msched[%i] = %x (mtype %x)\n", i, f->msched[i], f->mtype[i]); assert (f->INSN(f->msched[i]).opt[1] & (OPT_REF | OPT_REGISTER)); GEN (" if ("); print_deps (fo, f, REF_BB(f->msched[i]), f->INSN(f->msched[i]).dep, 1); GEN (") begin\n"); print_turn_off_dep (fo, f, dep); GEN (" f_stb[%i] <= #Tp 1'b1;\n", cur_call++); GEN (" fstart_o <= #Tp 1'b1;\n"); if (log2 (f->nfdeps)) GEN (" fid_o <= #Tp %i'h%x;\n", log2 (f->nfdeps), func_index (f, f->msched[i])); for (j = 0; j < 6; j++) GEN (" fr%i_o <= #Tp t%x_%x;\n", j + 3, REF_BB (f->msched[i]), REF_I (f->msched[i]) - 6 + i); GEN (" end\n"); } GEN (" if (f_end[%i]) begin\n", ncalls - 1); GEN (" f_stb <= #Tp %i'h0;\n", ncalls); GEN (" f_start_o <= #Tp 1'b0;\n"); GEN (" end\n"); GEN (" end\n"); GEN ("end\n"); } GEN ("\n/* Basic blocks state machine */\n"); GEN ("always @(posedge clk or posedge rst)\n"); GEN ("begin\n"); GEN (" if (rst) bb_stb <= #Tp %i'h%x;\n", f->num_bb, 0); GEN (" else if (end_o) bb_stb <= #Tp %i'h%x;\n", f->num_bb, 0); for (i = 0; i < f->num_bb; i++) { GEN (" end else if (bb_start[%i]) begin\n", i); GEN (" bb_stb <= #Tp %i'h%x;\n", f->num_bb, 1 << i); } GEN (" end else if (end_o) begin\n"); GEN (" bb_stb <= #Tp %i'h%x;\n", f->num_bb, 0); GEN (" end\n"); GEN ("end\n"); /* output footer */ GEN ("\nendmodule\n"); fclose (fo); } void generate_main (int nfuncs, cuc_func **f, char *filename) { FILE *fo; int i, j, nrf, first; char tmp[256]; int ncallees[MAX_FUNCS]; int maxncallees = 0; sprintf (tmp, "%s.v", filename); for (i = 0, nrf = 0; i < nfuncs; i++) { if (f[i]) f[i]->tmp = nrf++; ncallees[i] = 0; } if (!nrf) return; for (i = 0; i < nfuncs; i++) if (f[i]) for (j = 0; j < f[i]->nfdeps; j++) ncallees[f[i]->fdeps[j]->tmp]++; for (i = 0; i < nrf; i++) if (maxncallees < ncallees[i]) maxncallees = ncallees[i]; log ("Generating verilog file \"%s\"\n", tmp); printf ("Generating verilog file \"%s\"\n", tmp); if ((fo = fopen (tmp, "wt+")) == NULL) { fprintf (stderr, "Cannot open '%s'\n", tmp); exit (1); } /* output header */ GEN ("/* %s -- generated by OpenRISC Custom Unit Compiler\n", tmp); GEN (" (C) 2002 OpenCores http://www.opencores.org/ */\n\n"); GEN ("/* Includes %i functions:", nrf); for (i = 0; i < nfuncs; i++) if (f[i]) GEN ("\n%s", prof_func[i].name); GEN (" */\n\n"); GEN ("`include \"timescale.v\"\n\n"); GEN ("module %s (clk, rst,\n", filename); GEN (" /* Load and store master Wishbone ports */\n"); GEN (" lwb_adr_o, lwb_dat_i, lwb_cycstb_o,\n"); GEN (" lwb_sel_o, lwb_linbrst_o, lwb_ack_i,\n"); GEN (" swb_adr_o, swb_dat_o, swb_cycstb_o,\n"); GEN (" swb_sel_o, swb_linbrst_o, swb_ack_i,\n\n"); GEN (" /* cuc interface */\n"); GEN (" cuc_stb_i, cuc_adr_i, cuc_dat_i, cuc_dat_o, cuc_we_i, cuc_ack_o);\n\n"); GEN ("parameter Tp = 1;\n"); GEN ("\n/* module ports */\n"); GEN ("input clk, rst, cuc_stb_i, cuc_we_i;\n"); GEN ("input lwb_ack_i, swb_ack_i, lwb_linbrst_o, swb_linbrst_o;\n"); GEN ("output lwb_cycstb_o, lwb_linbrst_o;\n"); GEN ("output swb_cycstb_o swb_linbrst_o;\n"); GEN ("output cuc_ack_o;\n"); GEN ("output [3:0] lwb_sel_o, swb_sel_o;\n"); GEN ("output [31:0] lwb_adr_o, swb_adr_o, swb_dat_o, cuc_dat_o;\n"); GEN ("input [15:0] cuc_adr_i;\n"); GEN ("input [31:0] lwb_dat_i, cuc_dat_i;\n\n"); GEN ("wire [%2i:0] i_we, i_re, i_start, i_finish, i_selected, i_first_reg;\n", nrf - 1); GEN ("wire [%2i:0] i_bidok, main_start, main_end;\n", nrf - 1); GEN ("reg [%2i:0] i_go_bsy, main_start_r;\n", nrf - 1); GEN ("assign i_selected = {\n"); for (i = 0; i < nrf; i++) GEN (" cuc_adr_i[15:6] == %i%s\n", i, i < nrf - 1 ? "," : "};"); GEN ("assign i_first_reg = {\n"); for (i = 0; i < nrf; i++) { for (j = 0; j <= MAX_REGS; j++) if (f[i]->used_regs[j]) break; GEN (" cuc_adr_i[5:0] == %i%s\n", j, i < nrf - 1 ? "," : "};"); } GEN ("assign i_we = {%i{cuc_stb_i && cuc_we_i}} & i_selected;\n", nrf); GEN ("assign i_re = {%i{cuc_stb_i && !cuc_we_i}} & i_selected;\n", nrf); GEN ("assign i_start = i_go_bsy & {%i{cuc_ack_o}};\n", nrf); GEN ("assign i_start_bidok = {\n"); for (i = 0; i < nrf; i++) GEN (" i_start_bid[%i] < %i%s\n", i, i, i < nrf - 1 ? "," : "};"); GEN ("assign main_start = start_i & i_selected & i_first_reg & i_we;\n"); GEN ("assign main_end = {%i{end_i}} & i_selected;\n"); GEN ("\nalways @(posedge clk or posedge rst)\n"); GEN ("begin\n"); GEN (" if (rst) i_go_bsy <= #Tp %i'b0;\n", nrf); GEN (" else i_go_bsy <= #Tp i_we | ~i_finish & i_go_bsy;\n"); GEN ("end\n"); /* Function specific data */ for (i = 0; i < nfuncs; i++) if (f[i]) { int ci = 0, co = 0; int fn = f[i]->tmp; GEN ("\n/* Registers for function %s */\n", prof_func[i].name); for (j = 0, first = 1; j < MAX_REGS; j++) if (f[i]->used_regs[j]) { GEN ("%s i%i_r%ii", first ? "/* inputs */\nreg [31:0]" : ",", fn, j); first = 0; ci++; } if (ci) GEN (";\n"); for (j = 0, first = 1; j < MAX_REGS; j++) if (f[i]->lur[j] >= 0 && !f[i]->saved_regs[j]) { GEN ("%s i%i_r%io", first ? "/* outputs */\nreg [31:0]" : ",", fn, j); first = 0; co++; } if (co) GEN (";\n"); GEN ("always @(posedge clk or posedge rst)\n"); GEN (" if (rst) main_start_r <= #Tp %i'b0;\n", nrf); GEN (" else main_start_r <= #Tp main_start & i_start_bidok | i_busy | ~i_end & main_start_r;\n"); if (ci) { GEN ("\n/* write register access */\n"); GEN ("always @(posedge clk or posedge rst)\n"); GEN ("begin\n"); GEN (" if (rst) begin\n"); for (j = 0; j < MAX_REGS; j++) if (f[i]->used_regs[j]) GEN (" i%i_r%-2i <= #Tp 32'h0;\n", fn, j); GEN (" end else if (!i_go_bsy[%i] && i_we[%i])\n", fn, fn); GEN (" case (cuc_adr_i[5:0])\n"); for (j = 0; j < MAX_REGS; j++) if (f[i]->used_regs[j]) GEN (" %-2i: r%i <= #Tp cuc_dat_i;\n", j, j); GEN (" endcase\n"); GEN ("end\n"); } GEN ("\n"); } /* Generate machine for reading all function registers. Register read can be delayed till function completion */ { int co; GEN ("/* read register access - data */\n"); GEN ("always @(posedge clk or posedge rst)\n"); GEN (" if (rst) cuc_dat_o <= #Tp 32'h0;\n"); GEN (" else if (cuc_stb_i && cuc_we_i) begin\n"); GEN (" "); for (i = 0; i < nfuncs; i++) if (f[i]) { co = 0; for (j = 0; j < MAX_REGS; j++) if (f[i]->lur[j] >= 0 && !f[i]->saved_regs[j]) co++; GEN ("if (cuc_addr_i[15:6] == %i)", f[i]->tmp); if (co) { first = 1; GEN ("\n case (cuc_adr_i[5:0])\n"); for (j = 0; j < MAX_REGS; j++) if (f[i]->lur[j] >= 0 && !f[i]->saved_regs[j]) GEN (" %-2i: cuc_dat_o <= #Tp i%i_r%i;\n", j, f[i]->tmp, j); GEN (" endcase\n"); } else { GEN (" cuc_dat_o <= #Tp 32'hx;\n"); } GEN (" else "); } GEN ("cuc_dat_o <= #Tp 32'hx;\n"); GEN (" else cuc_dat_o <= #Tp 32'hx;\n"); GEN ("end\n"); GEN ("\n/* read register access - acknowledge */\n"); GEN ("always @(cuc_stb_i or cuc_we_i or cuc_adr_i"); for (i = 0; i < nrf; i++) GEN (" or main_end%i", i); GEN (")\n"); GEN (" if (cuc_stb_i && cuc_we_i) cuc_ack_o <= #Tp |(i_selected & main_end)\n"); GEN (" else cuc_ack_o <= #Tp 1'b0;\n"); GEN ("end\n"); } for (j = 0; j < 2; j++) { char t = j ? 's' : 'l'; GEN ("\n/* %s Wishbone bridge */\n", j ? "store" : "load"); GEN ("reg [%i:0] %cm_sel;\n", log2 (nrf), t); GEN ("reg [%i:0] %cm_bid;\n", log2 (nrf), t); GEN ("\n/* highest bid */\n"); GEN ("always @("); for (i = 0; i < nrf; i++) GEN ("%si%i_%cwb_cycstb", i > 0 ? " or " : "", i, t); GEN (")\n"); for (i = 0; i < nrf; i++) GEN (" %sif (i%i_%cwb_cycstb) %cm_bid <= %i'h%x;\n", i ? "else " : "", i, t, t, log2 (nrf) + 1, i); GEN ("\n/* selected transfer */\n"); GEN ("always @(posedge clk or posedge rst)\n"); GEN (" if (rst) %cm_sel <= #Tp %cm_sel <= #Tp %i'h0;\n", t, t, log2 (nrf) + 1); GEN (" else if (%cwb_ack_i) %cm_sel <= #Tp %i'h0;\n", t, t, log2 (nrf) + 1); GEN (" else if (!%ccyc_ip) %cm_sel <= #Tp %cm_bid;\n", t, t, t); GEN ("\n/* Cycle */\n"); GEN ("assign %cwb_cyc_o = (lwb_cycstb | swb_cycstb);\n", t); GEN ("assign %cwb_stb_o = %cwb_stb_o;\n", t, t); GEN ("\nalways @(posedge clk or posedge rst)\n"); GEN (" if (rst) %ccyc_ip <= #Tp 1'b0;\n", t); GEN (" else if (%cwb_ack_i) %ccyc_ip <= #Tp 1'b0;\n", t, t); GEN (" else %ccyc_ip <= #Tp %cwb_cyc_o;\n", t, t); } GEN ("\n/* Acknowledge */\n"); for (i = 0; i < nrf; i++) GEN ("assign i%i_swb_ack = ((sm_bid == %i & !scyc_ip) | sm_sel == %i) & swb_ack_i;\n", i, i, i); GEN ("\n/* Data */\n"); for (i = 0; i < nrf; i++) GEN ("wire [31:0] i%i_swb_dat;\n", i); GEN ("\nassign swb_dat_o = "); for (i = 0; i < nrf - 1; i++) GEN ("\n sm_bid == %i ? i%i_swb_dat : ", i, i); GEN ("i%i_swb_dat;\n\n", nrf - 1); for (i = 0; i < nrf; i++) GEN ("wire [31:0] i%i_lwb_dat = lwb_dat_i;\n", i); GEN ("\n/* selects */\n"); for (i = 0; i < nrf; i++) GEN ("wire [3:0] i%i_swb_sel, i%i_lwb_sel;\n", i, i); GEN ("\nassign swb_sel_o = "); for (i = 0; i < nrf - 1; i++) GEN ("\n sm_bid == %i ? i%i_swb_sel : ", i, i); GEN ("i%i_swb_sel;\n", nrf - 1); GEN ("\nassign lwb_sel_o = "); for (i = 0; i < nrf - 1; i++) GEN ("\n lm_bid == %i ? i%i_lwb_sel : ", i, i); GEN ("i%i_lwb_sel;\n", nrf - 1); GEN ("\n/* write enable */\n"); for (i = 0; i < nrf; i++) GEN ("wire i%i_swb_we, i%i_lwb_we;\n", i, i); GEN ("\nassign swb_we_o = "); for (i = 0; i < nrf - 1; i++) GEN ("\n sm_bid == %i ? i%i_swb_we : ", i, i); GEN ("i%i_swb_we;\n", nrf - 1); GEN ("\nassign lwb_we_o = "); for (i = 0; i < nrf - 1; i++) GEN ("\n lm_bid == %i ? i%i_lwb_we : ", i, i); GEN ("i%i_lwb_we;\n", nrf - 1); GEN ("\n/* burst enable */\n"); for (i = 0; i < nrf; i++) GEN ("wire i%i_swb_linbrst, i%i_lwb_linbrst;\n", i, i); GEN ("\nassign swb_linbrst_o = "); for (i = 0; i < nrf - 1; i++) GEN ("\n sm_bid == %i ? i%i_swb_linbrst : ", i, i); GEN ("i%i_swb_linbrst;\n", nrf - 1); GEN ("\n\nassign lwb_linbrst_o = "); for (i = 0; i < nrf - 1; i++) GEN ("\n lm_bid == %i ? i%i_lwb_linbrst : ", i, i); GEN ("i%i_lwb_linbrst;\n", nrf - 1); /* start/end signals */ GEN ("\n\n/* start/end signals */\n"); for (i = 0; i < nrf; i++) { if (log2 (maxncallees + 1)) GEN ("wire [%i:0] i%i_current = i%i_busy ? i%i_current_r : i%i_start_bid;\n", log2 (maxncallees + 1), i, i, i, i, i); else GEN ("wire i%i_current = 0;\n", i); } GEN ("\n"); for (i = 0, first = 1; i < nrf; i++) { GEN ("%si%i_current == %i && i_end[%i]", first ? "assign end_o = " : "\n || ", i, ncallees[i], i); first = 0; } GEN (";\n\n"); for (i = 0, j = 0; i < nfuncs; i++) if (f[i]) { if (log2 (ncallees[i])) { GEN ("reg [%i:0] i%i_start_bid;\n", log2 (ncallees[i]), j); GEN ("always @(start%i", f[i]->tmp); for (j = 0, first = 1; j < f[i]->nfdeps; j++) if (f[i]->fdeps[j]) GEN (", "); GEN (")\n"); GEN ("begin !!!\n"); //TODO GEN (" \n"); GEN ("end\n"); } GEN ("wire i%i_start = main_start[%i];\n", j, j); j++; } GEN ("\n"); for (i = 0; i < nfuncs; i++) if (f[i]) { int nf = f[i]->tmp; GEN ("\n%s i%i(.clk(clk), .rst(rst),\n", prof_func[i].name, nf); GEN (""); GEN (" .lwb_adr_o(i%i_lwb_adr), .lwb_dat_i(i%i_lwb_dat), .lwb_cycstb_o(i%i_lwb_cycstb),\n", nf, nf, nf); GEN (" .lwb_sel_o(i%i_lwb_sel), .lwb_linbrst_o(i%i_lwb_linbrst), .lwb_ack_i(i%i_lwb_ack),\n", nf, nf, nf); GEN (" .swb_adr_o(i%i_swb_adr), .swb_dat_o(i%i_swb_dat), .swb_cycstb_o(i%i_swb_cycstb),\n", nf, nf, nf); GEN (" .swb_sel_o(i%i_swb_sel), .swb_linbrst_o(i%i_swb_linbrst), .swb_ack_i(i%i_swb_ack),\n", nf, nf, nf); GEN (" "); for (j = 0, first = 1; j < MAX_REGS; j++) if (f[i]->used_regs[j]) GEN (".r%i_i(i_r%ii[%i]), ", j, j, nf), first = 0; if (first) GEN ("\n "); for (j = 0, first = 1; j < MAX_REGS; j++) if (f[i]->lur[j] >= 0 && !f[i]->saved_regs[j]) GEN (".r%i_o(i_r%io[%i]), ", j, j, nf), first = 0; if (first) GEN ("\n "); if (f[i]->nfdeps) { GEN (".fstart_o(i_fstart[%i]), .fend_i(i_fend[%i]), .fid_o(i%i_fid),\n", i, i, i), GEN (" .fr3_o(i%i_fr3), .fr4_o(i%i_fr4), .fr5_o(i%i_fr5), .fr6_o(i%i_fr6),\n"); GEN (" .fr7_o(i%i_fr7), .fr8_o(i%i_fr8), .fr11_i(i%i_fr11i),\n "); } GEN (".start_i(i_start[%i]), .end_o(i_end[%i]), .busy_o(i_busy[%i]));\n", nf, nf, nf); } /* output footer */ GEN ("\nendmodule\n"); fclose (fo); }
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