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jsauermann |
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "Backend.hh"
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#include "Node.hh"
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extern bool is_loader;
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extern int memtop;
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int Backend::stack_pointer = 0;
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int Backend::label_num = 1;
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int Backend::function_num = 1;
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//-----------------------------------------------------------------------------
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int Backend::check_size(int size, const char * function)
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{
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if (size == 1) return 8;
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if (size == 2) return 16;
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fprintf(stderr, "Backend::%s does not support %d bits\n", size * 8);
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return 0;
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}
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//-----------------------------------------------------------------------------
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int Backend::check_size(SUW suw, const char * function)
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{
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if (suw == SB) return 8;
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else if (suw == UB) return 8;
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else if (suw == WO) return 16;
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assert(0);
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}
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//-----------------------------------------------------------------------------
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void Backend::file_header()
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{
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if (is_loader)
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fprintf(out,
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"IN_RX_DATA\t= 0x00\t\t\t;\n"
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"IN_STATUS\t= 0x01\t\t\t;\n"
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"\n"
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"MEMTOP\t\t= 0x%4.4X\n"
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"\n"
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"OUT_TX_DATA\t= 0x00\t\t\t;\n"
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";---------------------------------------;\n"
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"RELOC_SRC\t= start+Cend_text-stack\t;\n"
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";---------------------------------------;\n"
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"\t\t\t\t\t;\n"
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"\tMOVE\t#reloc_rr, RR\t\t;\n"
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"\tMOVE\tRR, SP\t\t\t;\n"
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"\tMOVE\t#MEMTOP, LL\t\t; destination\n"
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"reloc:\t\t\t\t\t;\n"
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"\tMOVE\t(SP)+, RR\t\t; restore source\n"
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"\tMOVE\t-(RR), -(LL)\t\t;\n"
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"\tMOVE\tRR, -(SP)\t\t; save source\n"
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"\tSHI\tRR, #start\t\t;\n"
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"\tJMP\tRRNZ, reloc\t\t;\n"
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"\tMOVE\t#stack, RR\t\t;\n"
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"\tMOVE\tRR, SP\t\t\t;\n"
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"\tCALL\tCmain\t\t\t;\n"
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"halt:\t\t\t\t\t;\n"
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"\tHALT\t\t\t\t;\n"
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"reloc_rr:\t\t\t\t; source\n"
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"\t.WORD\tRELOC_SRC\t\t;\n"
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";---------------------------------------;\n"
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"start:\t\t\t\t\t;\n"
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"\t.OFFSET\tMEMTOP\t\t\t;\n"
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"stack:\t\t\t\t\t;\n"
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";---------------------------------------;\n", memtop);
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else
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fprintf(out,
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"IN_RX_DATA\t\t= 0x00\t\t;\n"
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"IN_STATUS\t\t= 0x01\t\t;\n"
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"IN_TEMPERAT\t\t= 0x02\t\t;\n"
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"IN_DIP_SWITCH\t\t= 0x03\t\t;\n"
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"IN_CLK_CTR_LOW\t\t= 0x05\t\t;\n"
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"IN_CLK_CTR_HIGH\t\t= 0x06\t\t;\n"
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"\n"
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"MEMTOP\t=0x%4.4X\n"
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"\n"
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"OUT_TX_DATA\t\t= 0x00\t\t;\n"
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"OUT_LEDS\t\t= 0x02\t\t;\n"
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"OUT_INT_MASK\t\t= 0x03\t\t;\n"
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"OUT_RESET_TIMER\t\t= 0x04\t\t;\n"
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"OUT_START_CLK_CTR\t= 0x05\t\t;\n"
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"OUT_STOP_CLK_CTR\t= 0x06\t\t;\n"
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";---------------------------------------;\n"
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"\tMOVE\t#MEMTOP, RR\t\t;\n"
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"\tMOVE\tRR, SP\t\t\t;\n"
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"\tEI\t\t\t\t;\n"
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"\tJMP\tCmain\t\t\t;\n"
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"\tJMP\tCinterrupt\t\t;\n"
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";---------------------------------------;\n"
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"mult_div:\t\t\t\t;\n"
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"\tMD_STP\t\t\t\t; 1\n"
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"\tMD_STP\t\t\t\t; 2\n"
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"\tMD_STP\t\t\t\t; 3\n"
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"\tMD_STP\t\t\t\t; 4\n"
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"\tMD_STP\t\t\t\t; 5\n"
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"\tMD_STP\t\t\t\t; 6\n"
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"\tMD_STP\t\t\t\t; 7\n"
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"\tMD_STP\t\t\t\t; 8\n"
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"\tMD_STP\t\t\t\t; 9\n"
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"\tMD_STP\t\t\t\t; 10\n"
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"\tMD_STP\t\t\t\t; 11\n"
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"\tMD_STP\t\t\t\t; 12\n"
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"\tMD_STP\t\t\t\t; 13\n"
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"\tMD_STP\t\t\t\t; 14\n"
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"\tMD_STP\t\t\t\t; 15\n"
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"\tMD_STP\t\t\t\t; 16\n"
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"\tRET\t\t\t\t;\n"
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";---------------------------------------;\n", memtop);
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}
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//-----------------------------------------------------------------------------
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void Backend::file_footer()
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{
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fprintf(out, "Cend_text:\t\t\t\t;\n");
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}
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//-----------------------------------------------------------------------------
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int Backend::new_function(const char * fname)
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{
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fprintf(out, "C%s:\n", fname);
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fflush(out);
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assert(stack_pointer == 0);
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function_num++;
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}
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//-----------------------------------------------------------------------------
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void Backend::asmbl(const char * asm_string)
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{
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if (*asm_string == ' ') fprintf(out, "\t%s\n", asm_string + 1);
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| 129 |
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else fprintf(out, "%s\n", asm_string);
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| 130 |
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| 131 |
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char buffer[256];
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int bufidx = 0;
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bool inside = true;
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for (;;)
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{
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char c = *asm_string++;
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switch(c)
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{
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case 0:
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case '\r':
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case '\n': buffer[bufidx] = 0;
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asm_adjust(buffer);
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bufidx = 0;
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inside = true;
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if (c == 0) return;
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break;
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case ';' : inside = false;
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break;
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case ' ': break; // ignore spaces
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default: assert(bufidx < (sizeof(buffer) - 3));
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if (inside) buffer[bufidx++] = c;
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}
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}
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}
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//-----------------------------------------------------------------------------
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void Backend::asm_adjust(const char * asm_line)
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{
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int osp = stack_pointer;
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bool need_adjust = false;
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if (strstr(asm_line, "-(SP)"))
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{
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need_adjust = true;
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if (strstr(asm_line, "RR,")) stack_pointer -= 2;
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else if (strstr(asm_line, "R,")) stack_pointer -= 1;
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else if (strstr(asm_line, "CLRW")) stack_pointer -= 2;
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else if (strstr(asm_line, "CLRB")) stack_pointer -= 1;
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}
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if (strstr(asm_line, "(SP)+"))
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{
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need_adjust = true;
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if (strstr(asm_line, ",RR")) stack_pointer += 2;
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else if (strstr(asm_line, ",RS")) stack_pointer += 1;
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else if (strstr(asm_line, ",RU")) stack_pointer += 1;
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else if (strstr(asm_line, ",LL")) stack_pointer += 2;
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else if (strstr(asm_line, ",LS")) stack_pointer += 1;
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else if (strstr(asm_line, ",LU")) stack_pointer += 1;
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}
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| 185 |
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if (need_adjust && osp == stack_pointer)
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{
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fprintf(out, "Bad ASM()\n");
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Node::Error();
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}
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| 190 |
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}
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//-----------------------------------------------------------------------------
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void Backend::load_rr_string(int snum, int offset)
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{
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fprintf(out, ";--\tload_rr_string\n");
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| 196 |
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if (offset) fprintf(out, "\tMOVE\t#Cstr_%d + %d, RR\n", snum, offset);
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else fprintf(out, "\tMOVE\t#Cstr_%d, RR\n", snum);
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| 198 |
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}
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//-----------------------------------------------------------------------------
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void Backend::load_ll_string(int snum, int offset)
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{
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fprintf(out, ";--\tload_ll_string\n");
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if (offset) fprintf(out, "\tMOVE\t#Cstr_%d + %d, LL\n", snum, offset);
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else fprintf(out, "\tMOVE\t#Cstr_%d, LL\n", snum);
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| 206 |
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}
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//-----------------------------------------------------------------------------
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| 208 |
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void Backend::load_rr_constant(int constant)
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{
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| 210 |
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fprintf(out, ";--\tload_rr_constant\n");
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| 211 |
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fprintf(out, "\tMOVE\t#0x%4.4X, RR\n", constant & 0xFFFF);
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| 212 |
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}
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//-----------------------------------------------------------------------------
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| 214 |
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void Backend::load_ll_constant(int constant)
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| 215 |
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{
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| 216 |
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fprintf(out, ";--\tload_ll_constant\n");
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| 217 |
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fprintf(out, "\tMOVE\t#0x%4.4X, LL\n", constant & 0xFFFF);
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| 218 |
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}
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| 219 |
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//-----------------------------------------------------------------------------
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| 220 |
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void Backend::load_rr_var(const char * name, SUW suw)
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| 221 |
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{
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| 222 |
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fprintf(out, ";--\tload_rr_var %s, (%d bit)\n",
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| 223 |
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name, check_size(suw, "load_rr_var"));
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| 224 |
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if (suw == SB) fprintf(out, "\tMOVE\t(C%s), RS\n", name);
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| 225 |
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else if (suw == UB) fprintf(out, "\tMOVE\t(C%s), RU\n", name);
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| 226 |
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else fprintf(out, "\tMOVE\t(C%s), RR\n", name);
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| 227 |
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}
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| 228 |
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//-----------------------------------------------------------------------------
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| 229 |
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void Backend::load_ll_var(const char * name, SUW suw)
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| 230 |
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{
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| 231 |
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fprintf(out, ";--\tload_ll_var %s, (%d bit)\n",
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name, check_size(suw, "load_ll_var"));
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| 233 |
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if (suw == SB) fprintf(out, "\tMOVE\t(C%s), LS\n", name);
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| 234 |
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else if (suw == UB) fprintf(out, "\tMOVE\t(C%s), LU\n", name);
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| 235 |
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else fprintf(out, "\tMOVE\t(C%s), LL\n", name);
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| 236 |
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}
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| 237 |
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//-----------------------------------------------------------------------------
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| 238 |
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void Backend::load_rr_var(const char * name, int sp_off, SUW suw)
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| 239 |
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{
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| 240 |
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fprintf(out, ";--\tload_rr_var %s = %d(FP), SP at %d (%d bit)\n",
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| 241 |
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name, sp_off, GetSP(), check_size(suw, "load_rr_var"));
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| 242 |
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| 243 |
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sp_off -= GetSP();
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| 244 |
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if (suw == SB) fprintf(out, "\tMOVE\t%d(SP), RS\n", sp_off);
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| 245 |
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else if (suw == UB) fprintf(out, "\tMOVE\t%d(SP), RU\n", sp_off);
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| 246 |
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else fprintf(out, "\tMOVE\t%d(SP), RR\n", sp_off);
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| 247 |
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}
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| 248 |
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//-----------------------------------------------------------------------------
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| 249 |
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void Backend::load_ll_var(const char * name, int sp_off, SUW suw)
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| 250 |
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{
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| 251 |
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fprintf(out, ";--\tload_ll_var %s = %d(FP), SP at %d (%d bit)\n",
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| 252 |
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name, sp_off, GetSP(), check_size(suw, "load_ll_var"));
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| 253 |
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| 254 |
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sp_off -= GetSP();
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| 255 |
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if (suw == SB) fprintf(out, "\tMOVE\t%d(SP), LS\n", sp_off);
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| 256 |
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else if (suw == UB) fprintf(out, "\tMOVE\t%d(SP), LU\n", sp_off);
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| 257 |
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else fprintf(out, "\tMOVE\t%d(SP), LL\n", sp_off);
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| 258 |
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}
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| 259 |
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//-----------------------------------------------------------------------------
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| 260 |
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void Backend::store_rr_var(const char * name, SUW suw)
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| 261 |
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{
|
| 262 |
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fprintf(out, ";--\tstore_rr_var %s\n", name);
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| 263 |
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if (suw == WO) fprintf(out, "\tMOVE\tRR, (C%s)\n", name);
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| 264 |
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else fprintf(out, "\tMOVE\tR, (C%s)\n", name);
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| 265 |
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}
|
| 266 |
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//-----------------------------------------------------------------------------
|
| 267 |
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void Backend::store_rr_var(const char * name, int sp_off, SUW suw)
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| 268 |
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{
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| 269 |
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fprintf(out, ";--\tstore_rr_var %s = %d(FP), SP at %d\n",
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| 270 |
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name, sp_off, GetSP());
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| 271 |
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| 272 |
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sp_off -= GetSP();
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| 273 |
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if (suw == WO) fprintf(out, "\tMOVE\tRR, %d(SP)\n", sp_off);
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| 274 |
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else fprintf(out, "\tMOVE\tR, %d(SP)\n", sp_off);
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| 275 |
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}
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| 276 |
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//-----------------------------------------------------------------------------
|
| 277 |
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void Backend::load_address(const char * name)
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| 278 |
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{
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| 279 |
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fprintf(out, ";--\tload_address %s\n", name);
|
| 280 |
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fprintf(out, "\tMOVE\t#C%s, RR\n", name);
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| 281 |
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}
|
| 282 |
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//-----------------------------------------------------------------------------
|
| 283 |
|
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void Backend::load_address(const char * name, int sp_offset)
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| 284 |
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{
|
| 285 |
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fprintf(out, ";--\tload_address %s = %d(FP), SP at %d\n",
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| 286 |
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name, sp_offset, GetSP());
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| 287 |
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fprintf(out, "\tLEA\t%d(SP), RR\n", sp_offset - GetSP());
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| 288 |
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}
|
| 289 |
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//-----------------------------------------------------------------------------
|
| 290 |
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void Backend::add_address(const char * name)
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| 291 |
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{
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| 292 |
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fprintf(out, ";--\tadd_address %s\n", name);
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| 293 |
|
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fprintf(out, "\tADD\tRR, #C%s\n", name);
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| 294 |
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}
|
| 295 |
|
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//-----------------------------------------------------------------------------
|
| 296 |
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void Backend::assign(int size)
|
| 297 |
|
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{
|
| 298 |
|
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fprintf(out, ";--\tassign (%d bit)\n", check_size(size, "assign"));
|
| 299 |
|
|
if (size == 1) fprintf(out, "\tMOVE\tR, (LL)\n");
|
| 300 |
|
|
else fprintf(out, "\tMOVE\tRR, (LL)\n");
|
| 301 |
|
|
}
|
| 302 |
|
|
//-----------------------------------------------------------------------------
|
| 303 |
|
|
void Backend::call(const char * name)
|
| 304 |
|
|
{
|
| 305 |
|
|
fprintf(out, ";--\tcall\n");
|
| 306 |
|
|
fprintf(out, "\tCALL\tC%s\n", name);
|
| 307 |
|
|
}
|
| 308 |
|
|
//-----------------------------------------------------------------------------
|
| 309 |
|
|
void Backend::call_ptr()
|
| 310 |
|
|
{
|
| 311 |
|
|
fprintf(out, ";--\tcall_ptr\n");
|
| 312 |
|
|
fprintf(out, "\tCALL\t(RR)\n");
|
| 313 |
|
|
}
|
| 314 |
|
|
//-----------------------------------------------------------------------------
|
| 315 |
|
|
void Backend::ret(int autosize)
|
| 316 |
|
|
{
|
| 317 |
|
|
fprintf(out, ";--\tret\n");
|
| 318 |
|
|
fprintf(out, "L%d_return:\n", function_num);
|
| 319 |
|
|
pop(autosize);
|
| 320 |
|
|
fprintf(out, "\tRET\n");
|
| 321 |
|
|
}
|
| 322 |
|
|
//-----------------------------------------------------------------------------
|
| 323 |
|
|
void Backend::push_rr(SUW suw)
|
| 324 |
|
|
{
|
| 325 |
|
|
fprintf(out, ";--\tpush_rr (%d bit)\n", check_size(suw, "push_rr"));
|
| 326 |
|
|
if (suw == WO) fprintf(out, "\tMOVE\tRR, -(SP)\n");
|
| 327 |
|
|
else fprintf(out, "\tMOVE\tR, -(SP)\n");
|
| 328 |
|
|
|
| 329 |
|
|
stack_pointer--;
|
| 330 |
|
|
if (suw == WO) stack_pointer--;
|
| 331 |
|
|
}
|
| 332 |
|
|
//-----------------------------------------------------------------------------
|
| 333 |
|
|
void Backend::pop_rr(SUW suw)
|
| 334 |
|
|
{
|
| 335 |
|
|
fprintf(out, ";--\tpop_rr (%d bit)\n", check_size(suw, "pop_rr"));
|
| 336 |
|
|
if (suw == SB) fprintf(out, "\tMOVE\t(SP)+, RS\n");
|
| 337 |
|
|
else if (suw == UB) fprintf(out, "\tMOVE\t(SP)+, RU\n");
|
| 338 |
|
|
else fprintf(out, "\tMOVE\t(SP)+, RR\n");
|
| 339 |
|
|
|
| 340 |
|
|
stack_pointer++;
|
| 341 |
|
|
if (suw == WO) stack_pointer++;
|
| 342 |
|
|
}
|
| 343 |
|
|
//-----------------------------------------------------------------------------
|
| 344 |
|
|
void Backend::pop_ll(SUW suw)
|
| 345 |
|
|
{
|
| 346 |
|
|
fprintf(out, ";--\tpop_ll (%d bit)\n", check_size(suw, "pop_ll"));
|
| 347 |
|
|
if (suw == SB) fprintf(out, "\tMOVE\t(SP)+, LS\n");
|
| 348 |
|
|
else if (suw == UB) fprintf(out, "\tMOVE\t(SP)+, LU\n");
|
| 349 |
|
|
else fprintf(out, "\tMOVE\t(SP)+, LL\n");
|
| 350 |
|
|
|
| 351 |
|
|
stack_pointer++;
|
| 352 |
|
|
if (suw == WO) stack_pointer++;
|
| 353 |
|
|
}
|
| 354 |
|
|
//-----------------------------------------------------------------------------
|
| 355 |
|
|
void Backend::pop(int pushed)
|
| 356 |
|
|
{
|
| 357 |
|
|
fprintf(out, ";--\tpop %d bytes\n", pushed);
|
| 358 |
|
|
assert(pushed >= 0);
|
| 359 |
|
|
stack_pointer += pushed;
|
| 360 |
|
|
|
| 361 |
|
|
if (pushed) fprintf(out, "\tADD\tSP, #%d\n", pushed);
|
| 362 |
|
|
}
|
| 363 |
|
|
//-----------------------------------------------------------------------------
|
| 364 |
|
|
void Backend::pop_return(int ret_bytes)
|
| 365 |
|
|
{
|
| 366 |
|
|
fprintf(out, ";--\tpop_return %d bytes\n", ret_bytes);
|
| 367 |
|
|
if (ret_bytes > 4) pop(ret_bytes);
|
| 368 |
|
|
}
|
| 369 |
|
|
//-----------------------------------------------------------------------------
|
| 370 |
|
|
int Backend::push_return(int ret_bytes)
|
| 371 |
|
|
{
|
| 372 |
|
|
fprintf(out, ";--\tpush %d bytes\n", ret_bytes);
|
| 373 |
|
|
if (ret_bytes <= 4) return 0;
|
| 374 |
|
|
push_zero(ret_bytes);
|
| 375 |
|
|
return ret_bytes;
|
| 376 |
|
|
}
|
| 377 |
|
|
//-----------------------------------------------------------------------------
|
| 378 |
|
|
void Backend::push_zero(int bytes)
|
| 379 |
|
|
{
|
| 380 |
|
|
fprintf(out, ";--\tpush_zero %d bytes\n", bytes);
|
| 381 |
|
|
stack_pointer -= bytes; // doesn't really matter
|
| 382 |
|
|
|
| 383 |
|
|
for (; bytes > 1; bytes -= 2) fprintf(out, "\tCLRW\t-(SP)\n");
|
| 384 |
|
|
if (bytes) fprintf(out, "\tCLRB\t-(SP)\n");
|
| 385 |
|
|
}
|
| 386 |
|
|
//-----------------------------------------------------------------------------
|
| 387 |
|
|
void Backend::move_rr_to_ll()
|
| 388 |
|
|
{
|
| 389 |
|
|
fprintf(out, ";--\tmove_rr_to_ll\n");
|
| 390 |
|
|
fprintf(out, "\tMOVE\tRR, LL\n");
|
| 391 |
|
|
}
|
| 392 |
|
|
//-----------------------------------------------------------------------------
|
| 393 |
|
|
void Backend::label(int lab)
|
| 394 |
|
|
{
|
| 395 |
|
|
fprintf(out, "L%d_%d:\n", function_num, lab);
|
| 396 |
|
|
}
|
| 397 |
|
|
//-----------------------------------------------------------------------------
|
| 398 |
|
|
void Backend::label(const char * name)
|
| 399 |
|
|
{
|
| 400 |
|
|
fprintf(out, "L%d_%s:\n", function_num, name);
|
| 401 |
|
|
}
|
| 402 |
|
|
//-----------------------------------------------------------------------------
|
| 403 |
|
|
void Backend::label(const char * name, int loop)
|
| 404 |
|
|
{
|
| 405 |
|
|
fprintf(out, "L%d_%s_%d:\n", function_num, name, loop);
|
| 406 |
|
|
}
|
| 407 |
|
|
//-----------------------------------------------------------------------------
|
| 408 |
|
|
void Backend::label(const char * name, int loop, int value)
|
| 409 |
|
|
{
|
| 410 |
|
|
fprintf(out, "L%d_%s_%d_%4.4X:\n", function_num, name, loop, value & 0xFFFF);
|
| 411 |
|
|
}
|
| 412 |
|
|
//-----------------------------------------------------------------------------
|
| 413 |
|
|
void Backend::branch(int lab)
|
| 414 |
|
|
{
|
| 415 |
|
|
fprintf(out, ";--\tbranch\n");
|
| 416 |
|
|
fprintf(out, "\tJMP\tL%d_%d\n", function_num, lab);
|
| 417 |
|
|
}
|
| 418 |
|
|
//-----------------------------------------------------------------------------
|
| 419 |
|
|
void Backend::branch(const char * name)
|
| 420 |
|
|
{
|
| 421 |
|
|
fprintf(out, ";--\tbranch\n");
|
| 422 |
|
|
fprintf(out, "\tJMP\tL%d_%s\n", function_num, name);
|
| 423 |
|
|
}
|
| 424 |
|
|
//-----------------------------------------------------------------------------
|
| 425 |
|
|
void Backend::branch(const char * name, int loop)
|
| 426 |
|
|
{
|
| 427 |
|
|
fprintf(out, ";--\tbranch\n");
|
| 428 |
|
|
fprintf(out, "\tJMP\tL%d_%s_%d\n", function_num, name, loop);
|
| 429 |
|
|
}
|
| 430 |
|
|
//-----------------------------------------------------------------------------
|
| 431 |
|
|
void Backend::branch_true(const char * name, int loop, int size)
|
| 432 |
|
|
{
|
| 433 |
|
|
fprintf(out, ";--\tbranch_true\n");
|
| 434 |
|
|
fprintf(out, "\tJMP\tRRNZ, L%d_%s_%d\n", function_num, name, loop);
|
| 435 |
|
|
}
|
| 436 |
|
|
//-----------------------------------------------------------------------------
|
| 437 |
|
|
void Backend::branch_false(const char * name, int loop, int size)
|
| 438 |
|
|
{
|
| 439 |
|
|
fprintf(out, ";--\tbranch_false\n");
|
| 440 |
|
|
fprintf(out, "\tJMP\tRRZ, L%d_%s_%d\n", function_num, name, loop);
|
| 441 |
|
|
}
|
| 442 |
|
|
//-----------------------------------------------------------------------------
|
| 443 |
|
|
void Backend::branch_case(const char * name, int loop, int size, int value)
|
| 444 |
|
|
{
|
| 445 |
|
|
int bits = check_size(size, "branch_case");
|
| 446 |
|
|
|
| 447 |
|
|
fprintf(out, ";--\tbranch_case (%d bit)\n", bits);
|
| 448 |
|
|
fprintf(out, "\tSEQ\tLL, #0x%4.4X\n", value & 0xFFFF);
|
| 449 |
|
|
fprintf(out, "\tJMP\tRRNZ, L%d_%s_%d_%4.4X\n",
|
| 450 |
|
|
function_num, name, loop, value & 0xFFFF);
|
| 451 |
|
|
}
|
| 452 |
|
|
//-----------------------------------------------------------------------------
|
| 453 |
|
|
void Backend::compute_unary(int what, const char * pretty)
|
| 454 |
|
|
{
|
| 455 |
|
|
const char * opc = "???";
|
| 456 |
|
|
|
| 457 |
|
|
fprintf(out, ";--\t16 bit %s\n", pretty);
|
| 458 |
|
|
switch(what)
|
| 459 |
|
|
{
|
| 460 |
|
|
case ET_LOG_NOT: opc = "LNOT"; break;
|
| 461 |
|
|
case ET_NEGATE: opc = "NEG"; break;
|
| 462 |
|
|
case ET_COMPLEMENT: opc = "NOT"; break;
|
| 463 |
|
|
|
| 464 |
|
|
default:
|
| 465 |
|
|
assert(0 && "Bad unary what");
|
| 466 |
|
|
break;
|
| 467 |
|
|
}
|
| 468 |
|
|
fprintf(out, "\t%s\tRR\n", opc);
|
| 469 |
|
|
}
|
| 470 |
|
|
//-----------------------------------------------------------------------------
|
| 471 |
|
|
// constant right side (non-constant operand in RR !)
|
| 472 |
|
|
//
|
| 473 |
|
|
void Backend::compute_binary(int what, bool uns, const char * pretty, int value)
|
| 474 |
|
|
{
|
| 475 |
|
|
const char * opc = "???";
|
| 476 |
|
|
|
| 477 |
|
|
fprintf(out, ";--\t%s\n", pretty);
|
| 478 |
|
|
switch(what)
|
| 479 |
|
|
{
|
| 480 |
|
|
case ET_BIT_OR: opc = "OR"; break;
|
| 481 |
|
|
case ET_BIT_AND: opc = "AND"; break;
|
| 482 |
|
|
case ET_BIT_XOR: opc = "XOR"; break;
|
| 483 |
|
|
case ET_LEFT: opc = "LSL"; break;
|
| 484 |
|
|
case ET_EQUAL: opc = "SEQ"; break;
|
| 485 |
|
|
case ET_NOT_EQUAL: opc = "SNE"; break;
|
| 486 |
|
|
case ET_LESS_EQUAL: opc = uns ? "SLS" : "SLE"; break;
|
| 487 |
|
|
case ET_LESS: opc = uns ? "SLO" : "SLT"; break;
|
| 488 |
|
|
case ET_GREATER_EQUAL: opc = uns ? "SHS" : "SGE"; break;
|
| 489 |
|
|
case ET_GREATER: opc = uns ? "SHI" : "SGT"; break;
|
| 490 |
|
|
case ET_RIGHT: opc = uns ? "LSR" : "ASR"; break;
|
| 491 |
|
|
|
| 492 |
|
|
case ET_ADD: if (value == 0) return;
|
| 493 |
|
|
opc = "ADD";
|
| 494 |
|
|
if (value > 0) break;
|
| 495 |
|
|
opc = "SUB";
|
| 496 |
|
|
value = - value; break;
|
| 497 |
|
|
|
| 498 |
|
|
case ET_SUB: if (value == 0) return;
|
| 499 |
|
|
opc = "SUB";
|
| 500 |
|
|
if (value > 0) break;
|
| 501 |
|
|
opc = "ADD";
|
| 502 |
|
|
value = - value; break;
|
| 503 |
|
|
|
| 504 |
|
|
|
| 505 |
|
|
case ET_MULT: // expr * const
|
| 506 |
|
|
switch(value & 0xFFFF) // special cases
|
| 507 |
|
|
{
|
| 508 |
|
|
case 0x0000: fprintf(out, "\tMOVE\t#0, RR\n");
|
| 509 |
|
|
return;
|
| 510 |
|
|
|
| 511 |
|
|
case 0x0001: case 0x0002: case 0x0004: case 0x0008:
|
| 512 |
|
|
case 0x0010: case 0x0020: case 0x0040: case 0x0080:
|
| 513 |
|
|
case 0x0100: case 0x0200: case 0x0400: case 0x0800:
|
| 514 |
|
|
case 0x1000: case 0x2000: case 0x4000:
|
| 515 |
|
|
mult_shift(value, false);
|
| 516 |
|
|
return;
|
| 517 |
|
|
|
| 518 |
|
|
case 0xFFFF: case 0xFFFE: case 0xFFFC: case 0xFFF8:
|
| 519 |
|
|
case 0xFFF0: case 0xFFE0: case 0xFFC0: case 0xFF80:
|
| 520 |
|
|
case 0xFF00: case 0xFE00: case 0xFC00: case 0xF800:
|
| 521 |
|
|
case 0xF000: case 0xE000: case 0xC000: case 0x8000:
|
| 522 |
|
|
mult_shift(-value, true);
|
| 523 |
|
|
return;
|
| 524 |
|
|
}
|
| 525 |
|
|
|
| 526 |
|
|
fprintf(out, "\tMOVE\tRR, LL\n");
|
| 527 |
|
|
fprintf(out, "\tMOVE\t#0x%4.4X, RR\n", value & 0xFFFF);
|
| 528 |
|
|
compute_binary(what, uns, pretty);
|
| 529 |
|
|
return;
|
| 530 |
|
|
|
| 531 |
|
|
case ET_DIV: // expr / const
|
| 532 |
|
|
switch(value & 0xFFFF) // special cases
|
| 533 |
|
|
{
|
| 534 |
|
|
case 0x0000: assert(0 && "Division by 0");
|
| 535 |
|
|
|
| 536 |
|
|
case 0x0001: case 0x0002: case 0x0004: case 0x0008:
|
| 537 |
|
|
case 0x0010: case 0x0020: case 0x0040: case 0x0080:
|
| 538 |
|
|
case 0x0100: case 0x0200: case 0x0400: case 0x0800:
|
| 539 |
|
|
case 0x1000: case 0x2000: case 0x4000:
|
| 540 |
|
|
div_shift(value, false, uns);
|
| 541 |
|
|
return;
|
| 542 |
|
|
|
| 543 |
|
|
case 0xFFFF: case 0xFFFE: case 0xFFFC: case 0xFFF8:
|
| 544 |
|
|
case 0xFFF0: case 0xFFE0: case 0xFFC0: case 0xFF80:
|
| 545 |
|
|
case 0xFF00: case 0xFE00: case 0xFC00: case 0xF800:
|
| 546 |
|
|
case 0xF000: case 0xE000: case 0xC000: case 0x8000:
|
| 547 |
|
|
div_shift(-value, true, uns);
|
| 548 |
|
|
return;
|
| 549 |
|
|
}
|
| 550 |
|
|
|
| 551 |
|
|
fprintf(out, "\tMOVE\tRR, LL\n");
|
| 552 |
|
|
fprintf(out, "\tMOVE\t#0x%4.4X, RR\n", value & 0xFFFF);
|
| 553 |
|
|
compute_binary(what, uns, pretty);
|
| 554 |
|
|
return;
|
| 555 |
|
|
|
| 556 |
|
|
case ET_MOD: // expr % const
|
| 557 |
|
|
switch(value & 0xFFFF) // special cases
|
| 558 |
|
|
{
|
| 559 |
|
|
case 0x0000: assert(0 && "Division by 0");
|
| 560 |
|
|
|
| 561 |
|
|
case 0x0001: case 0x0002: case 0x0004: case 0x0008:
|
| 562 |
|
|
case 0x0010: case 0x0020: case 0x0040: case 0x0080:
|
| 563 |
|
|
case 0x0100: case 0x0200: case 0x0400: case 0x0800:
|
| 564 |
|
|
case 0x1000: case 0x2000: case 0x4000:
|
| 565 |
|
|
mod_and(value, false, uns);
|
| 566 |
|
|
return;
|
| 567 |
|
|
|
| 568 |
|
|
case 0xFFFF: case 0xFFFE: case 0xFFFC: case 0xFFF8:
|
| 569 |
|
|
case 0xFFF0: case 0xFFE0: case 0xFFC0: case 0xFF80:
|
| 570 |
|
|
case 0xFF00: case 0xFE00: case 0xFC00: case 0xF800:
|
| 571 |
|
|
case 0xF000: case 0xE000: case 0xC000: case 0x8000:
|
| 572 |
|
|
mod_and(-value, true, uns);
|
| 573 |
|
|
return;
|
| 574 |
|
|
}
|
| 575 |
|
|
|
| 576 |
|
|
fprintf(out, "\tMOVE\tRR, LL\n");
|
| 577 |
|
|
fprintf(out, "\tMOVE\t#0x%4.4X, RR\n", value & 0xFFFF);
|
| 578 |
|
|
compute_binary(what, uns, pretty);
|
| 579 |
|
|
return;
|
| 580 |
|
|
|
| 581 |
|
|
default:
|
| 582 |
|
|
assert(0 && "Bad what");
|
| 583 |
|
|
return;
|
| 584 |
|
|
}
|
| 585 |
|
|
|
| 586 |
|
|
fprintf(out, "\t%s\tRR, #0x%4.4X\n", opc, value & 0xFFFF);
|
| 587 |
|
|
}
|
| 588 |
|
|
//-----------------------------------------------------------------------------
|
| 589 |
|
|
void Backend::mult_shift(int value, bool negative)
|
| 590 |
|
|
{
|
| 591 |
|
|
assert(value >= 0);
|
| 592 |
|
|
if (negative) fprintf(out, "\tNEG\tRR\n");
|
| 593 |
|
|
|
| 594 |
|
|
switch(value) // special cases
|
| 595 |
|
|
{
|
| 596 |
|
|
case 0x0001: return;
|
| 597 |
|
|
case 0x0002: fprintf(out, "\tLSL\tRR, #1\n"); return;
|
| 598 |
|
|
case 0x0004: fprintf(out, "\tLSL\tRR, #2\n"); return;
|
| 599 |
|
|
case 0x0008: fprintf(out, "\tLSL\tRR, #3\n"); return;
|
| 600 |
|
|
case 0x0010: fprintf(out, "\tLSL\tRR, #4\n"); return;
|
| 601 |
|
|
case 0x0020: fprintf(out, "\tLSL\tRR, #5\n"); return;
|
| 602 |
|
|
case 0x0040: fprintf(out, "\tLSL\tRR, #6\n"); return;
|
| 603 |
|
|
case 0x0080: fprintf(out, "\tLSL\tRR, #7\n"); return;
|
| 604 |
|
|
case 0x0100: fprintf(out, "\tLSL\tRR, #8\n"); return;
|
| 605 |
|
|
case 0x0200: fprintf(out, "\tLSL\tRR, #9\n"); return;
|
| 606 |
|
|
case 0x0400: fprintf(out, "\tLSL\tRR, #10\n"); return;
|
| 607 |
|
|
case 0x0800: fprintf(out, "\tLSL\tRR, #11\n"); return;
|
| 608 |
|
|
case 0x1000: fprintf(out, "\tLSL\tRR, #12\n"); return;
|
| 609 |
|
|
case 0x2000: fprintf(out, "\tLSL\tRR, #13\n"); return;
|
| 610 |
|
|
case 0x4000: fprintf(out, "\tLSL\tRR, #14\n"); return;
|
| 611 |
|
|
case 0x8000: fprintf(out, "\tLSL\tRR, #15\n"); return;
|
| 612 |
|
|
default: assert(0);
|
| 613 |
|
|
}
|
| 614 |
|
|
}
|
| 615 |
|
|
//-----------------------------------------------------------------------------
|
| 616 |
|
|
void Backend::div_shift(int value, bool negative, bool uns)
|
| 617 |
|
|
{
|
| 618 |
|
|
assert(value >= 0);
|
| 619 |
|
|
if (negative) fprintf(out, "\tNEG\tRR\n");
|
| 620 |
|
|
|
| 621 |
|
|
const char * op = "ASR";
|
| 622 |
|
|
if (uns) op = "LSR";
|
| 623 |
|
|
|
| 624 |
|
|
switch(value) // special cases
|
| 625 |
|
|
{
|
| 626 |
|
|
case 0x0001: return;
|
| 627 |
|
|
case 0x0002: fprintf(out, "\t%s\tRR, #1\n", op); return;
|
| 628 |
|
|
case 0x0004: fprintf(out, "\t%s\tRR, #2\n", op); return;
|
| 629 |
|
|
case 0x0008: fprintf(out, "\t%s\tRR, #3\n", op); return;
|
| 630 |
|
|
case 0x0010: fprintf(out, "\t%s\tRR, #4\n", op); return;
|
| 631 |
|
|
case 0x0020: fprintf(out, "\t%s\tRR, #5\n", op); return;
|
| 632 |
|
|
case 0x0040: fprintf(out, "\t%s\tRR, #6\n", op); return;
|
| 633 |
|
|
case 0x0080: fprintf(out, "\t%s\tRR, #7\n", op); return;
|
| 634 |
|
|
case 0x0100: fprintf(out, "\t%s\tRR, #8\n", op); return;
|
| 635 |
|
|
case 0x0200: fprintf(out, "\t%s\tRR, #9\n", op); return;
|
| 636 |
|
|
case 0x0400: fprintf(out, "\t%s\tRR, #10\n", op); return;
|
| 637 |
|
|
case 0x0800: fprintf(out, "\t%s\tRR, #11\n", op); return;
|
| 638 |
|
|
case 0x1000: fprintf(out, "\t%s\tRR, #12\n", op); return;
|
| 639 |
|
|
case 0x2000: fprintf(out, "\t%s\tRR, #13\n", op); return;
|
| 640 |
|
|
case 0x4000: fprintf(out, "\t%s\tRR, #14\n", op); return;
|
| 641 |
|
|
case 0x8000: fprintf(out, "\t%s\tRR, #15\n", op); return;
|
| 642 |
|
|
default: assert(0);
|
| 643 |
|
|
}
|
| 644 |
|
|
}
|
| 645 |
|
|
//-----------------------------------------------------------------------------
|
| 646 |
|
|
void Backend::mod_and(int value, bool negative, bool uns)
|
| 647 |
|
|
{
|
| 648 |
|
|
assert(value >= 0);
|
| 649 |
|
|
if (negative) fprintf(out, "\tNEG\tRR\n");
|
| 650 |
|
|
|
| 651 |
|
|
switch(value) // special cases
|
| 652 |
|
|
{
|
| 653 |
|
|
case 0x0001: fprintf(out, "\tMOVE\t#0, RR\n"); return;
|
| 654 |
|
|
case 0x0002: fprintf(out, "\tAND\tRR, #0x0001\n"); return;
|
| 655 |
|
|
case 0x0004: fprintf(out, "\tAND\tRR, #0x0003\n"); return;
|
| 656 |
|
|
case 0x0008: fprintf(out, "\tAND\tRR, #0x0007\n"); return;
|
| 657 |
|
|
case 0x0010: fprintf(out, "\tAND\tRR, #0x000F\n"); return;
|
| 658 |
|
|
case 0x0020: fprintf(out, "\tAND\tRR, #0x001F\n"); return;
|
| 659 |
|
|
case 0x0040: fprintf(out, "\tAND\tRR, #0x003F\n"); return;
|
| 660 |
|
|
case 0x0080: fprintf(out, "\tAND\tRR, #0x007F\n"); return;
|
| 661 |
|
|
case 0x0100: fprintf(out, "\tAND\tRR, #0x00FF\n"); return;
|
| 662 |
|
|
case 0x0200: fprintf(out, "\tAND\tRR, #0x01FF\n"); return;
|
| 663 |
|
|
case 0x0400: fprintf(out, "\tAND\tRR, #0x03FF\n"); return;
|
| 664 |
|
|
case 0x0800: fprintf(out, "\tAND\tRR, #0x07FF\n"); return;
|
| 665 |
|
|
case 0x1000: fprintf(out, "\tAND\tRR, #0x0FFF\n"); return;
|
| 666 |
|
|
case 0x2000: fprintf(out, "\tAND\tRR, #0x1FFF\n"); return;
|
| 667 |
|
|
case 0x4000: fprintf(out, "\tAND\tRR, #0x3FFF\n"); return;
|
| 668 |
|
|
case 0x8000: fprintf(out, "\tAND\tRR, #0x7FFF\n"); return;
|
| 669 |
|
|
default: assert(0);
|
| 670 |
|
|
}
|
| 671 |
|
|
}
|
| 672 |
|
|
//-----------------------------------------------------------------------------
|
| 673 |
|
|
// constant left side (non-constant operand in RR !)
|
| 674 |
|
|
//
|
| 675 |
|
|
void Backend::compute_binary(int what, bool uns, int value, const char * pretty)
|
| 676 |
|
|
{
|
| 677 |
|
|
// symmetric operators: exchange left and right...
|
| 678 |
|
|
//
|
| 679 |
|
|
switch(what)
|
| 680 |
|
|
{
|
| 681 |
|
|
case ET_BIT_OR:
|
| 682 |
|
|
case ET_BIT_AND:
|
| 683 |
|
|
case ET_BIT_XOR:
|
| 684 |
|
|
case ET_ADD:
|
| 685 |
|
|
case ET_MULT:
|
| 686 |
|
|
case ET_EQUAL:
|
| 687 |
|
|
case ET_NOT_EQUAL:
|
| 688 |
|
|
compute_binary(what, uns, pretty, value); return;
|
| 689 |
|
|
|
| 690 |
|
|
case ET_LESS_EQUAL:
|
| 691 |
|
|
compute_binary(ET_GREATER, uns, ">", value); return;
|
| 692 |
|
|
|
| 693 |
|
|
case ET_LESS:
|
| 694 |
|
|
compute_binary(ET_GREATER_EQUAL, uns, ">=", value); return;
|
| 695 |
|
|
|
| 696 |
|
|
case ET_GREATER_EQUAL:
|
| 697 |
|
|
compute_binary(ET_LESS, uns, "<", value); return;
|
| 698 |
|
|
|
| 699 |
|
|
case ET_GREATER:
|
| 700 |
|
|
compute_binary(ET_LESS_EQUAL, uns, "<=", value); return;
|
| 701 |
|
|
}
|
| 702 |
|
|
|
| 703 |
|
|
// assymmetric operators: load constant and call non-const operator
|
| 704 |
|
|
//
|
| 705 |
|
|
switch(what)
|
| 706 |
|
|
{
|
| 707 |
|
|
case ET_SUB:
|
| 708 |
|
|
case ET_LEFT:
|
| 709 |
|
|
case ET_RIGHT:
|
| 710 |
|
|
case ET_DIV:
|
| 711 |
|
|
case ET_MOD:
|
| 712 |
|
|
fprintf(out, "\tMOVE\t#0x%4.4X, LL\n", value & 0xFFFF);
|
| 713 |
|
|
compute_binary(what, uns, pretty);
|
| 714 |
|
|
return;
|
| 715 |
|
|
}
|
| 716 |
|
|
|
| 717 |
|
|
assert(0 && "Bad what");
|
| 718 |
|
|
}
|
| 719 |
|
|
//-----------------------------------------------------------------------------
|
| 720 |
|
|
void Backend::compute_binary(int what, bool uns, const char * pretty)
|
| 721 |
|
|
{
|
| 722 |
|
|
const char * opc = "???";
|
| 723 |
|
|
|
| 724 |
|
|
fprintf(out, ";--\t%s\n", pretty);
|
| 725 |
|
|
switch(what)
|
| 726 |
|
|
{
|
| 727 |
|
|
case ET_BIT_OR: opc = "OR"; break;
|
| 728 |
|
|
case ET_BIT_AND: opc = "AND"; break;
|
| 729 |
|
|
case ET_BIT_XOR: opc = "XOR"; break;
|
| 730 |
|
|
case ET_ADD: opc = "ADD"; break;
|
| 731 |
|
|
case ET_SUB: opc = "SUB"; break;
|
| 732 |
|
|
case ET_EQUAL: opc = "SEQ"; break;
|
| 733 |
|
|
case ET_NOT_EQUAL: opc = "SNE"; break;
|
| 734 |
|
|
case ET_LESS_EQUAL: opc = uns ? "SLS" : "SLE"; break;
|
| 735 |
|
|
case ET_LESS: opc = uns ? "SLO" : "SLT"; break;
|
| 736 |
|
|
case ET_GREATER_EQUAL: opc = uns ? "SHS" : "SGE"; break;
|
| 737 |
|
|
case ET_GREATER: opc = uns ? "SHI" : "SGT"; break;
|
| 738 |
|
|
|
| 739 |
|
|
case ET_MULT: // expr * expr
|
| 740 |
|
|
fprintf(out, "\tDI\n");
|
| 741 |
|
|
if (uns) fprintf(out, "\tMUL_IU\n");
|
| 742 |
|
|
else fprintf(out, "\tMUL_IS\n");
|
| 743 |
|
|
fprintf(out, "\tCALL\tmult_div\n");
|
| 744 |
|
|
fprintf(out, "\tMD_FIN\n");
|
| 745 |
|
|
fprintf(out, "\tEI\n");
|
| 746 |
|
|
return;
|
| 747 |
|
|
|
| 748 |
|
|
case ET_DIV: // expr / expr
|
| 749 |
|
|
fprintf(out, "\tDI\n");
|
| 750 |
|
|
if (uns) fprintf(out, "\tDIV_IU\n");
|
| 751 |
|
|
else fprintf(out, "\tDIV_IS\n");
|
| 752 |
|
|
fprintf(out, "\tCALL\tmult_div\n");
|
| 753 |
|
|
fprintf(out, "\tMD_FIN\n");
|
| 754 |
|
|
fprintf(out, "\tEI\n");
|
| 755 |
|
|
return;
|
| 756 |
|
|
|
| 757 |
|
|
case ET_MOD: // expr % expr
|
| 758 |
|
|
fprintf(out, "\tDI\n");
|
| 759 |
|
|
if (uns) fprintf(out, "\tDIV_IU\n");
|
| 760 |
|
|
else fprintf(out, "\tDIV_IS\n");
|
| 761 |
|
|
fprintf(out, "\tCALL\tmult_div\n");
|
| 762 |
|
|
fprintf(out, "\tMOD_FIN\n");
|
| 763 |
|
|
fprintf(out, "\tEI\n");
|
| 764 |
|
|
return;
|
| 765 |
|
|
|
| 766 |
|
|
default:
|
| 767 |
|
|
assert(0 && "Bad what");
|
| 768 |
|
|
break;
|
| 769 |
|
|
}
|
| 770 |
|
|
|
| 771 |
|
|
fprintf(out, "\t%s\tLL, RR\n", opc);
|
| 772 |
|
|
}
|
| 773 |
|
|
//-----------------------------------------------------------------------------
|
| 774 |
|
|
void Backend::content(SUW suw)
|
| 775 |
|
|
{
|
| 776 |
|
|
check_size(suw, "content");
|
| 777 |
|
|
fprintf(out, ";--\tcontent\n");
|
| 778 |
|
|
if (suw == SB) fprintf(out, "\tMOVE\t(RR), RS\n");
|
| 779 |
|
|
else if (suw == UB) fprintf(out, "\tMOVE\t(RR), RU\n");
|
| 780 |
|
|
else fprintf(out, "\tMOVE\t(RR), RR\n");
|
| 781 |
|
|
}
|
| 782 |
|
|
//-----------------------------------------------------------------------------
|
| 783 |
|
|
void Backend::scale_rr(int size)
|
| 784 |
|
|
{
|
| 785 |
|
|
assert(size > 0);
|
| 786 |
|
|
fprintf(out, ";--\tscale_rr *%d\n", size);
|
| 787 |
|
|
|
| 788 |
|
|
if (size == 1) return;
|
| 789 |
|
|
check_size(size, "scale_rr");
|
| 790 |
|
|
|
| 791 |
|
|
compute_binary(ET_MULT, false, "*", size);
|
| 792 |
|
|
// fprintf(out, "\tLSL\tRR, #%d\n", size);
|
| 793 |
|
|
}
|
| 794 |
|
|
//-----------------------------------------------------------------------------
|
| 795 |
|
|
void Backend::unscale_rr(int size, bool uns)
|
| 796 |
|
|
{
|
| 797 |
|
|
assert(size > 0);
|
| 798 |
|
|
fprintf(out, ";--\tscale *%d\n", size);
|
| 799 |
|
|
|
| 800 |
|
|
if (size == 1) return;
|
| 801 |
|
|
check_size(size, "unscale_rr");
|
| 802 |
|
|
|
| 803 |
|
|
compute_binary(ET_DIV, uns, "/", size);
|
| 804 |
|
|
// if (uns) fprintf(out, "\tLSR\tRR, #%d\n", size);
|
| 805 |
|
|
// else fprintf(out, "\tASR\tRR, #%d\n", size);
|
| 806 |
|
|
}
|
| 807 |
|
|
//-----------------------------------------------------------------------------
|
