ref: 7420dc6adab03f28020243d71a3372cda15cacbc
dir: /sys/src/cmd/vl/asm.c/
#include "l.h" long OFFSET; /* long BADOFFSET = -1; if(OFFSET <= BADOFFSET && OFFSET+4 > BADOFFSET)\ abort();\ OFFSET += 4;\ if(OFFSET == BADOFFSET)\ abort();\ OFFSET++;\ */ #define LPUT(l) { \ if (little) { \ LLEPUT(l); \ } else { \ LBEPUT(l); \ } \ } #define LLEPUT(c)\ {\ cbp[0] = (c);\ cbp[1] = (c)>>8;\ cbp[2] = (c)>>16;\ cbp[3] = (c)>>24;\ cbp += 4;\ cbc -= 4;\ if(cbc <= 0)\ cflush();\ } #define LBEPUT(c)\ {\ cbp[0] = (c)>>24;\ cbp[1] = (c)>>16;\ cbp[2] = (c)>>8;\ cbp[3] = (c);\ cbp += 4;\ cbc -= 4;\ if(cbc <= 0)\ cflush();\ } #define HPUT(h) { \ if (little) { \ HLEPUT(h); \ } else { \ HBEPUT(h); \ } \ } #define HLEPUT(c)\ {\ cbp[0] = (c);\ cbp[1] = (c)>>8;\ cbp += 2;\ cbc -= 2;\ if(cbc <= 0)\ cflush();\ } #define HBEPUT(c)\ {\ cbp[0] = (c)>>8;\ cbp[1] = (c);\ cbp += 2;\ cbc -= 2;\ if(cbc <= 0)\ cflush();\ } #define CPUT(c)\ {\ cbp[0] = (c);\ cbp++;\ cbc--;\ if(cbc <= 0)\ cflush();\ } void objput(long l) /* emit long in byte order appropriate to object machine */ { LPUT(l); } void objhput(short s) { HPUT(s); } void lput(long l) /* emit long in big-endian byte order */ { LBEPUT(l); } long entryvalue(void) { char *a; Sym *s; a = INITENTRY; if(*a >= '0' && *a <= '9') return atolwhex(a); s = lookup(a, 0); if(s->type == 0) return INITTEXT; if(s->type != STEXT && s->type != SLEAF) diag("entry not text: %s", s->name); return s->value; } void asmb(void) { Prog *p; long t, etext; Optab *o; if(debug['v']) Bprint(&bso, "%5.2f asm\n", cputime()); Bflush(&bso); OFFSET = HEADR; seek(cout, OFFSET, 0); pc = INITTEXT; for(p = firstp; p != P; p = p->link) { if(p->as == ATEXT) { curtext = p; autosize = p->to.offset + 4; } if(p->pc != pc) { diag("phase error %lux sb %lux", p->pc, pc); if(!debug['a']) prasm(curp); pc = p->pc; } curp = p; o = oplook(p); /* could probably avoid this call */ if(asmout(p, o, 0)) { p = p->link; pc += 4; } pc += o->size; } if(debug['a']) Bprint(&bso, "\n"); Bflush(&bso); cflush(); etext = INITTEXT + textsize; for(t = pc; t < etext; t += sizeof(buf)-100) { if(etext-t > sizeof(buf)-100) datblk(t, sizeof(buf)-100, 1); else datblk(t, etext-t, 1); } Bflush(&bso); cflush(); curtext = P; switch(HEADTYPE) { case 0: case 4: OFFSET = rnd(HEADR+textsize, 4096); seek(cout, OFFSET, 0); break; case 1: case 2: case 3: case 5: case 6: OFFSET = HEADR+textsize; seek(cout, OFFSET, 0); break; } for(t = 0; t < datsize; t += sizeof(buf)-100) { if(datsize-t > sizeof(buf)-100) datblk(t, sizeof(buf)-100, 0); else datblk(t, datsize-t, 0); } symsize = 0; lcsize = 0; if(!debug['s']) { if(debug['v']) Bprint(&bso, "%5.2f sym\n", cputime()); Bflush(&bso); switch(HEADTYPE) { case 0: case 4: OFFSET = rnd(HEADR+textsize, 4096)+datsize; seek(cout, OFFSET, 0); break; case 3: case 2: case 1: case 5: case 6: OFFSET = HEADR+textsize+datsize; seek(cout, OFFSET, 0); break; } if(!debug['s']) asmsym(); if(debug['v']) Bprint(&bso, "%5.2f pc\n", cputime()); Bflush(&bso); if(!debug['s']) asmlc(); cflush(); } if(debug['v']) Bprint(&bso, "%5.2f header\n", cputime()); Bflush(&bso); OFFSET = 0; seek(cout, OFFSET, 0); switch(HEADTYPE) { case 0: lput(0x160L<<16); /* magic and sections */ lput(0L); /* time and date */ lput(rnd(HEADR+textsize, 4096)+datsize); lput(symsize); /* nsyms */ lput((0x38L<<16)|7L); /* size of optional hdr and flags */ lput((0413<<16)|0437L); /* magic and version */ lput(rnd(HEADR+textsize, 4096)); /* sizes */ lput(datsize); lput(bsssize); lput(entryvalue()); /* va of entry */ lput(INITTEXT-HEADR); /* va of base of text */ lput(INITDAT); /* va of base of data */ lput(INITDAT+datsize); /* va of base of bss */ lput(~0L); /* gp reg mask */ lput(0L); lput(0L); lput(0L); lput(0L); lput(~0L); /* gp value ?? */ break; case 1: lput(0x160L<<16); /* magic and sections */ lput(0L); /* time and date */ lput(HEADR+textsize+datsize); lput(symsize); /* nsyms */ lput((0x38L<<16)|7L); /* size of optional hdr and flags */ lput((0407<<16)|0437L); /* magic and version */ lput(textsize); /* sizes */ lput(datsize); lput(bsssize); lput(entryvalue()); /* va of entry */ lput(INITTEXT); /* va of base of text */ lput(INITDAT); /* va of base of data */ lput(INITDAT+datsize); /* va of base of bss */ lput(~0L); /* gp reg mask */ lput(lcsize); lput(0L); lput(0L); lput(0L); lput(~0L); /* gp value ?? */ lput(0L); /* complete mystery */ break; case 2: if (little) t = 24; else t = 16; lput(((((4*t)+0)*t)+7)); /* magic */ lput(textsize); /* sizes */ lput(datsize); lput(bsssize); lput(symsize); /* nsyms */ lput(entryvalue()); /* va of entry */ lput(0L); lput(lcsize); break; case 3: lput((0x160L<<16)|3L); /* magic and sections */ lput(time(0)); /* time and date */ lput(HEADR+textsize+datsize); lput(symsize); /* nsyms */ lput((0x38L<<16)|7L); /* size of optional hdr and flags */ lput((0407<<16)|0437L); /* magic and version */ lput(textsize); /* sizes */ lput(datsize); lput(bsssize); lput(entryvalue()); /* va of entry */ lput(INITTEXT); /* va of base of text */ lput(INITDAT); /* va of base of data */ lput(INITDAT+datsize); /* va of base of bss */ lput(~0L); /* gp reg mask */ lput(lcsize); lput(0L); lput(0L); lput(0L); lput(~0L); /* gp value ?? */ strnput(".text", 8); /* text segment */ lput(INITTEXT); /* address */ lput(INITTEXT); lput(textsize); lput(HEADR); lput(0L); lput(HEADR+textsize+datsize+symsize); lput(lcsize & 0xffff); /* line number size */ lput(0x20L); /* flags */ strnput(".data", 8); /* data segment */ lput(INITDAT); /* address */ lput(INITDAT); lput(datsize); lput(HEADR+textsize); lput(0L); lput(0L); lput(0L); lput(0x40L); /* flags */ strnput(".bss", 8); /* bss segment */ lput(INITDAT+datsize); /* address */ lput(INITDAT+datsize); lput(bsssize); lput(0L); lput(0L); lput(0L); lput(0L); lput(0x80L); /* flags */ break; case 4: lput((0x160L<<16)|3L); /* magic and sections */ lput(time(0)); /* time and date */ lput(rnd(HEADR+textsize, 4096)+datsize); lput(symsize); /* nsyms */ lput((0x38L<<16)|7L); /* size of optional hdr and flags */ lput((0413<<16)|01012L); /* magic and version */ lput(textsize); /* sizes */ lput(datsize); lput(bsssize); lput(entryvalue()); /* va of entry */ lput(INITTEXT); /* va of base of text */ lput(INITDAT); /* va of base of data */ lput(INITDAT+datsize); /* va of base of bss */ lput(~0L); /* gp reg mask */ lput(lcsize); lput(0L); lput(0L); lput(0L); lput(~0L); /* gp value ?? */ strnput(".text", 8); /* text segment */ lput(INITTEXT); /* address */ lput(INITTEXT); lput(textsize); lput(HEADR); lput(0L); lput(HEADR+textsize+datsize+symsize); lput(lcsize & 0xffff); /* line number size */ lput(0x20L); /* flags */ strnput(".data", 8); /* data segment */ lput(INITDAT); /* address */ lput(INITDAT); lput(datsize); lput(rnd(HEADR+textsize, 4096)); /* sizes */ lput(0L); lput(0L); lput(0L); lput(0x40L); /* flags */ strnput(".bss", 8); /* bss segment */ lput(INITDAT+datsize); /* address */ lput(INITDAT+datsize); lput(bsssize); lput(0L); lput(0L); lput(0L); lput(0L); lput(0x80L); /* flags */ break; case 5: /* first part of ELF is byte-wide parts, thus no byte-order issues */ strnput("\177ELF", 4); /* e_ident */ CPUT(1); /* class = 32 bit */ CPUT(little? 1: 2); /* data: 1 = LSB, 2 = MSB */ CPUT(1); /* version = 1 */ strnput("", 9); /* reserved for expansion */ /* entire remainder of ELF file is in target byte order */ /* file header part of ELF header */ objhput(2); /* type = EXEC */ objhput(8); /* machine = MIPS */ objput(1L); /* version = CURRENT */ objput(entryvalue()); /* entry vaddr */ objput(52L); /* offset to first phdr */ objput(0L); /* offset to first shdr */ objput(0L); /* flags (no MIPS flags defined) */ objhput(52); /* Ehdr size */ objhput(32); /* Phdr size */ objhput(3); /* # of Phdrs */ objhput(0); /* Shdr size */ objhput(0); /* # of Shdrs */ objhput(0); /* Shdr string size */ /* "Program headers" - one per chunk of file to load */ /* * include ELF headers in text -- 8l doesn't, * but in theory it aids demand loading. */ objput(1L); /* text: type = PT_LOAD */ objput(0L); /* file offset */ objput(INITTEXT-HEADR); /* vaddr */ objput(INITTEXT-HEADR); /* paddr */ objput(HEADR+textsize); /* file size */ objput(HEADR+textsize); /* memory size */ objput(0x05L); /* protections = RX */ objput(0x1000L); /* page-align text off's & vaddrs */ objput(1L); /* data: type = PT_LOAD */ objput(HEADR+textsize); /* file offset */ objput(INITDAT); /* vaddr */ objput(INITDAT); /* paddr */ objput(datsize); /* file size */ objput(datsize+bsssize); /* memory size */ objput(0x06L); /* protections = RW */ if(INITDAT % 4096 == 0 && (HEADR + textsize) % 4096 == 0) objput(0x1000L); /* page-align data off's & vaddrs */ else objput(0L); /* do not claim alignment */ objput(0L); /* P9 symbols: type = PT_NULL */ objput(HEADR+textsize+datsize); /* file offset */ objput(0L); objput(0L); objput(symsize); /* symbol table size */ objput(lcsize); /* line number size */ objput(0x04L); /* protections = R */ objput(0L); /* do not claim alignment */ break; case 6: break; } cflush(); } void strnput(char *s, int n) { for(; *s; s++){ CPUT(*s); n--; } for(; n > 0; n--) CPUT(0); } void cflush(void) { int n; n = sizeof(buf.cbuf) - cbc; if(n) write(cout, buf.cbuf, n); cbp = buf.cbuf; cbc = sizeof(buf.cbuf); } void nopstat(char *f, Count *c) { if(c->outof) Bprint(&bso, "%s delay %ld/%ld (%.2f)\n", f, c->outof - c->count, c->outof, (double)(c->outof - c->count)/c->outof); } void asmsym(void) { Prog *p; Auto *a; Sym *s; int h; s = lookup("etext", 0); if(s->type == STEXT) putsymb(s->name, 'T', s->value, s->version); for(h=0; h<NHASH; h++) for(s=hash[h]; s!=S; s=s->link) switch(s->type) { case SCONST: putsymb(s->name, 'D', s->value, s->version); continue; case SSTRING: putsymb(s->name, 'T', s->value, s->version); continue; case SDATA: putsymb(s->name, 'D', s->value+INITDAT, s->version); continue; case SBSS: putsymb(s->name, 'B', s->value+INITDAT, s->version); continue; case SFILE: putsymb(s->name, 'f', s->value, s->version); continue; } for(p=textp; p!=P; p=p->cond) { s = p->from.sym; if(s->type != STEXT && s->type != SLEAF) continue; /* filenames first */ for(a=p->to.autom; a; a=a->link) if(a->type == D_FILE) putsymb(a->asym->name, 'z', a->aoffset, 0); else if(a->type == D_FILE1) putsymb(a->asym->name, 'Z', a->aoffset, 0); if(s->type == STEXT) putsymb(s->name, 'T', s->value, s->version); else putsymb(s->name, 'L', s->value, s->version); /* frame, auto and param after */ putsymb(".frame", 'm', p->to.offset+4, 0); for(a=p->to.autom; a; a=a->link) if(a->type == D_AUTO) putsymb(a->asym->name, 'a', -a->aoffset, 0); else if(a->type == D_PARAM) putsymb(a->asym->name, 'p', a->aoffset, 0); } if(debug['v'] || debug['n']) Bprint(&bso, "symsize = %lud\n", symsize); Bflush(&bso); } void putsymb(char *s, int t, long v, int ver) { int i, f; if(t == 'f') s++; LBEPUT(v); if(ver) t += 'a' - 'A'; CPUT(t+0x80); /* 0x80 is variable length */ if(t == 'Z' || t == 'z') { CPUT(s[0]); for(i=1; s[i] != 0 || s[i+1] != 0; i += 2) { CPUT(s[i]); CPUT(s[i+1]); } CPUT(0); CPUT(0); i++; } else { for(i=0; s[i]; i++) CPUT(s[i]); CPUT(0); } symsize += 4 + 1 + i + 1; if(debug['n']) { if(t == 'z' || t == 'Z') { Bprint(&bso, "%c %.8lux ", t, v); for(i=1; s[i] != 0 || s[i+1] != 0; i+=2) { f = ((s[i]&0xff) << 8) | (s[i+1]&0xff); Bprint(&bso, "/%x", f); } Bprint(&bso, "\n"); return; } if(ver) Bprint(&bso, "%c %.8lux %s<%d>\n", t, v, s, ver); else Bprint(&bso, "%c %.8lux %s\n", t, v, s); } } #define MINLC 4 void asmlc(void) { long oldpc, oldlc; Prog *p; long v, s; oldpc = INITTEXT; oldlc = 0; for(p = firstp; p != P; p = p->link) { if(p->line == oldlc || p->as == ATEXT || p->as == ANOP) { if(p->as == ATEXT) curtext = p; if(debug['L']) Bprint(&bso, "%6lux %P\n", p->pc, p); continue; } if(debug['L']) Bprint(&bso, "\t\t%6ld", lcsize); v = (p->pc - oldpc) / MINLC; while(v) { s = 127; if(v < 127) s = v; CPUT(s+128); /* 129-255 +pc */ if(debug['L']) Bprint(&bso, " pc+%ld*%d(%ld)", s, MINLC, s+128); v -= s; lcsize++; } s = p->line - oldlc; oldlc = p->line; oldpc = p->pc + MINLC; if(s > 64 || s < -64) { CPUT(0); /* 0 vv +lc */ CPUT(s>>24); CPUT(s>>16); CPUT(s>>8); CPUT(s); if(debug['L']) { if(s > 0) Bprint(&bso, " lc+%ld(%d,%ld)\n", s, 0, s); else Bprint(&bso, " lc%ld(%d,%ld)\n", s, 0, s); Bprint(&bso, "%6lux %P\n", p->pc, p); } lcsize += 5; continue; } if(s > 0) { CPUT(0+s); /* 1-64 +lc */ if(debug['L']) { Bprint(&bso, " lc+%ld(%ld)\n", s, 0+s); Bprint(&bso, "%6lux %P\n", p->pc, p); } } else { CPUT(64-s); /* 65-128 -lc */ if(debug['L']) { Bprint(&bso, " lc%ld(%ld)\n", s, 64-s); Bprint(&bso, "%6lux %P\n", p->pc, p); } } lcsize++; } while(lcsize & 1) { s = 129; CPUT(s); lcsize++; } if(debug['v'] || debug['L']) Bprint(&bso, "lcsize = %ld\n", lcsize); Bflush(&bso); } void datblk(long s, long n, int str) { Prog *p; char *cast; long l, fl, j, d; int i, c; memset(buf.dbuf, 0, n+100); for(p = datap; p != P; p = p->link) { curp = p; if(str != (p->from.sym->type == SSTRING)) continue; l = p->from.sym->value + p->from.offset - s; c = p->reg; i = 0; if(l < 0) { if(l+c <= 0) continue; while(l < 0) { l++; i++; } } if(l >= n) continue; if(p->as != AINIT && p->as != ADYNT) { for(j=l+(c-i)-1; j>=l; j--) if(buf.dbuf[j]) { print("%P\n", p); diag("multiple initialization"); break; } } switch(p->to.type) { default: diag("unknown mode in initialization\n%P", p); break; case D_FCONST: switch(c) { default: case 4: fl = ieeedtof(p->to.ieee); cast = (char*)&fl; for(; i<c; i++) { buf.dbuf[l] = cast[fnuxi8[i+4]]; l++; } break; case 8: cast = (char*)p->to.ieee; for(; i<c; i++) { buf.dbuf[l] = cast[fnuxi8[i]]; l++; } break; } break; case D_SCONST: for(; i<c; i++) { buf.dbuf[l] = p->to.sval[i]; l++; } break; case D_CONST: d = p->to.offset; if(p->to.sym) { switch(p->to.sym->type) { case STEXT: case SLEAF: case SSTRING: d += p->to.sym->value; break; case SDATA: case SBSS: d += p->to.sym->value + INITDAT; break; } } cast = (char*)&d; switch(c) { default: diag("bad nuxi %d %d\n%P", c, i, curp); break; case 1: for(; i<c; i++) { buf.dbuf[l] = cast[inuxi1[i]]; l++; } break; case 2: for(; i<c; i++) { buf.dbuf[l] = cast[inuxi2[i]]; l++; } break; case 4: for(; i<c; i++) { buf.dbuf[l] = cast[inuxi4[i]]; l++; } break; } break; } } write(cout, buf.dbuf, n); } #define OP_RRR(op,r1,r2,r3)\ (op|(((r1)&31L)<<16)|(((r2)&31L)<<21)|(((r3)&31L)<<11)) #define OP_IRR(op,i,r2,r3)\ (op|((i)&0xffffL)|(((r2)&31L)<<21)|(((r3)&31L)<<16)) #define OP_SRR(op,s,r2,r3)\ (op|(((s)&31L)<<6)|(((r2)&31L)<<16)|(((r3)&31L)<<11)) #define OP_FRRR(op,r1,r2,r3)\ (op|(((r1)&31L)<<16)|(((r2)&31L)<<11)|(((r3)&31L)<<6)) #define OP_JMP(op,i)\ ((op)|((i)&0x3ffffffL)) #define OP(x,y)\ (((x)<<3)|((y)<<0)) #define SP(x,y)\ (((x)<<29)|((y)<<26)) #define BCOND(x,y)\ (((x)<<19)|((y)<<16)) #define MMU(x,y)\ (SP(2,0)|(16<<21)|((x)<<3)|((y)<<0)) #define FPF(x,y)\ (SP(2,1)|(16<<21)|((x)<<3)|((y)<<0)) #define FPD(x,y)\ (SP(2,1)|(17<<21)|((x)<<3)|((y)<<0)) #define FPW(x,y)\ (SP(2,1)|(20<<21)|((x)<<3)|((y)<<0)) int vshift(int); int asmout(Prog *p, Optab *o, int aflag) { long o1, o2, o3, o4, o5, o6, o7, v; Prog *ct; int r, a; o1 = 0; o2 = 0; o3 = 0; o4 = 0; o5 = 0; o6 = 0; o7 = 0; switch(o->type) { default: diag("unknown type %d", o->type); if(!debug['a']) prasm(p); break; case 0: /* pseudo ops */ if(aflag) { if(p->link) { if(p->as == ATEXT) { ct = curtext; o2 = autosize; curtext = p; autosize = p->to.offset + 4; o1 = asmout(p->link, oplook(p->link), aflag); curtext = ct; autosize = o2; } else o1 = asmout(p->link, oplook(p->link), aflag); } return o1; } break; case 1: /* mov[v] r1,r2 ==> OR r1,r0,r2 */ o1 = OP_RRR(oprrr(AOR), p->from.reg, REGZERO, p->to.reg); break; case 2: /* add/sub r1,[r2],r3 */ r = p->reg; if(r == NREG) r = p->to.reg; o1 = OP_RRR(oprrr(p->as), p->from.reg, r, p->to.reg); break; case 3: /* mov $soreg, r ==> or/add $i,o,r */ v = regoff(&p->from); r = p->from.reg; if(r == NREG) r = o->param; a = AADDU; if(o->a1 == C_ANDCON) a = AOR; o1 = OP_IRR(opirr(a), v, r, p->to.reg); break; case 4: /* add $scon,[r1],r2 */ v = regoff(&p->from); r = p->reg; if(r == NREG) r = p->to.reg; o1 = OP_IRR(opirr(p->as), v, r, p->to.reg); break; case 5: /* syscall */ if(aflag) return 0; o1 = oprrr(p->as); break; case 6: /* beq r1,[r2],sbra */ if(aflag) return 0; if(p->cond == P) v = -4 >> 2; else v = (p->cond->pc - pc-4) >> 2; if(((v << 16) >> 16) != v) diag("short branch too far: %ld\n%P", v, p); o1 = OP_IRR(opirr(p->as), v, p->from.reg, p->reg); break; case 7: /* mov r, soreg ==> sw o(r) */ r = p->to.reg; if(r == NREG) r = o->param; v = regoff(&p->to); o1 = OP_IRR(opirr(p->as), v, r, p->from.reg); break; case 8: /* mov soreg, r ==> lw o(r) */ r = p->from.reg; if(r == NREG) r = o->param; v = regoff(&p->from); o1 = OP_IRR(opirr(p->as+ALAST), v, r, p->to.reg); break; case 9: /* asl r1,[r2],r3 */ r = p->reg; if(r == NREG) r = p->to.reg; o1 = OP_RRR(oprrr(p->as), r, p->from.reg, p->to.reg); break; case 10: /* add $con,[r1],r2 ==> mov $con,t; add t,[r1],r2 */ v = regoff(&p->from); r = AOR; if(v < 0) r = AADDU; o1 = OP_IRR(opirr(r), v, 0, REGTMP); r = p->reg; if(r == NREG) r = p->to.reg; o2 = OP_RRR(oprrr(p->as), REGTMP, r, p->to.reg); break; case 11: /* jmp lbra */ if(aflag) return 0; if(p->cond == P) v = p->pc >> 2; else v = p->cond->pc >> 2; o1 = OP_JMP(opirr(p->as), v); if(!debug['Y'] && p->link && p->cond && isnop(p->link)) { nop.branch.count--; nop.branch.outof--; nop.jump.outof++; o2 = asmout(p->cond, oplook(p->cond), 1); if(o2) { o1 += 1; if(debug['a']) Bprint(&bso, " %.8lux: %.8lux %.8lux%P\n", p->pc, o1, o2, p); LPUT(o1); LPUT(o2); return 1; } } break; case 12: /* movbs r,r */ v = 16; if(p->as == AMOVB) v = 24; o1 = OP_SRR(opirr(ASLL), v, p->from.reg, p->to.reg); o2 = OP_SRR(opirr(ASRA), v, p->to.reg, p->to.reg); break; case 13: /* movbu r,r */ if(p->as == AMOVBU) o1 = OP_IRR(opirr(AAND), 0xffL, p->from.reg, p->to.reg); else o1 = OP_IRR(opirr(AAND), 0xffffL, p->from.reg, p->to.reg); break; case 16: /* sll $c,[r1],r2 */ v = regoff(&p->from); r = p->reg; if(r == NREG) r = p->to.reg; /* OP_SRR will use only the low 5 bits of the shift value */ if(v >= 32 && vshift(p->as)) o1 = OP_SRR(opirr(p->as+ALAST), v-32, r, p->to.reg); else o1 = OP_SRR(opirr(p->as), v, r, p->to.reg); break; case 18: /* jmp [r1],0(r2) */ if(aflag) return 0; r = p->reg; if(r == NREG) r = o->param; o1 = OP_RRR(oprrr(p->as), 0, p->to.reg, r); break; case 19: /* mov $lcon,r ==> lu+or */ v = regoff(&p->from); o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, p->to.reg); o2 = OP_IRR(opirr(AOR), v, p->to.reg, p->to.reg); break; case 20: /* mov lohi,r */ r = OP(2,0); /* mfhi */ if(p->from.type == D_LO) r = OP(2,2); /* mflo */ o1 = OP_RRR(r, REGZERO, REGZERO, p->to.reg); break; case 21: /* mov r,lohi */ r = OP(2,1); /* mthi */ if(p->to.type == D_LO) r = OP(2,3); /* mtlo */ o1 = OP_RRR(r, REGZERO, p->from.reg, REGZERO); break; case 22: /* mul r1,r2 */ o1 = OP_RRR(oprrr(p->as), p->from.reg, p->reg, REGZERO); break; case 23: /* add $lcon,r1,r2 ==> lu+or+add */ v = regoff(&p->from); if(p->to.reg == REGTMP || p->reg == REGTMP) diag("cant synthesize large constant\n%P", p); o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP); o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP); r = p->reg; if(r == NREG) r = p->to.reg; o3 = OP_RRR(oprrr(p->as), REGTMP, r, p->to.reg); break; case 24: /* mov $ucon,,r ==> lu r */ v = regoff(&p->from); o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, p->to.reg); break; case 25: /* add/and $ucon,[r1],r2 ==> lu $con,t; add t,[r1],r2 */ v = regoff(&p->from); o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP); r = p->reg; if(r == NREG) r = p->to.reg; o2 = OP_RRR(oprrr(p->as), REGTMP, r, p->to.reg); break; case 26: /* mov $lsext/auto/oreg,,r2 ==> lu+or+add */ v = regoff(&p->from); if(p->to.reg == REGTMP) diag("cant synthesize large constant\n%P", p); o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP); o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP); r = p->from.reg; if(r == NREG) r = o->param; o3 = OP_RRR(oprrr(AADDU), REGTMP, r, p->to.reg); break; case 27: /* mov [sl]ext/auto/oreg,fr ==> lwc1 o(r) */ r = p->from.reg; if(r == NREG) r = o->param; v = regoff(&p->from); switch(o->size) { case 20: o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP); o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP); o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP); o4 = OP_IRR(opirr(AMOVF+ALAST), 0, REGTMP, p->to.reg+1); o5 = OP_IRR(opirr(AMOVF+ALAST), 4, REGTMP, p->to.reg); break; case 16: o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP); o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP); o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP); o4 = OP_IRR(opirr(AMOVF+ALAST), 0, REGTMP, p->to.reg); break; case 8: o1 = OP_IRR(opirr(AMOVF+ALAST), v, r, p->to.reg+1); o2 = OP_IRR(opirr(AMOVF+ALAST), v+4, r, p->to.reg); break; case 4: o1 = OP_IRR(opirr(AMOVF+ALAST), v, r, p->to.reg); break; } break; case 28: /* mov fr,[sl]ext/auto/oreg ==> swc1 o(r) */ r = p->to.reg; if(r == NREG) r = o->param; v = regoff(&p->to); switch(o->size) { case 20: if(r == REGTMP) diag("cant synthesize large constant\n%P", p); o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP); o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP); o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP); o4 = OP_IRR(opirr(AMOVF), 0, REGTMP, p->from.reg+1); o5 = OP_IRR(opirr(AMOVF), 4, REGTMP, p->from.reg); break; case 16: if(r == REGTMP) diag("cant synthesize large constant\n%P", p); o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP); o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP); o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP); o4 = OP_IRR(opirr(AMOVF), 0, REGTMP, p->from.reg); break; case 8: o1 = OP_IRR(opirr(AMOVF), v, r, p->from.reg+1); o2 = OP_IRR(opirr(AMOVF), v+4, r, p->from.reg); break; case 4: o1 = OP_IRR(opirr(AMOVF), v, r, p->from.reg); break; } break; case 30: /* movw r,fr */ r = SP(2,1)|(4<<21); /* mtc1 */ o1 = OP_RRR(r, p->from.reg, 0, p->to.reg); break; case 31: /* movw fr,r */ r = SP(2,1)|(0<<21); /* mfc1 */ o1 = OP_RRR(r, p->to.reg, 0, p->from.reg); break; case 32: /* fadd fr1,[fr2],fr3 */ r = p->reg; if(r == NREG) o1 = OP_FRRR(oprrr(p->as), p->from.reg, p->to.reg, p->to.reg); else o1 = OP_FRRR(oprrr(p->as), p->from.reg, r, p->to.reg); break; case 33: /* fabs fr1,fr3 */ o1 = OP_FRRR(oprrr(p->as), 0, p->from.reg, p->to.reg); break; case 34: /* mov $con,fr ==> or/add $i,r,r2 */ v = regoff(&p->from); r = AADDU; if(o->a1 == C_ANDCON) r = AOR; o1 = OP_IRR(opirr(r), v, 0, REGTMP); o2 = OP_RRR(SP(2,1)|(4<<21), REGTMP, 0, p->to.reg); /* mtc1 */ break; case 35: /* mov r,lext/luto/oreg ==> sw o(r) */ /* * the lowbits of the constant cannot * be moved into the offset of the load * because the mips 4000 in 64-bit mode * does a 64-bit add and it will screw up. */ v = regoff(&p->to); r = p->to.reg; if(r == NREG) r = o->param; if(r == REGTMP) diag("cant synthesize large constant\n%P", p); o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP); o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP); o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP); o4 = OP_IRR(opirr(p->as), 0, REGTMP, p->from.reg); break; case 36: /* mov lext/lauto/lreg,r ==> lw o(r30) */ v = regoff(&p->from); r = p->from.reg; if(r == NREG) r = o->param; if(r == REGTMP) diag("cant synthesize large constant\n%P", p); o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP); o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP); o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP); o4 = OP_IRR(opirr(p->as+ALAST), 0, REGTMP, p->to.reg); break; case 37: /* movw r,mr */ r = SP(2,0)|(4<<21); /* mtc0 */ if(p->as == AMOVV) r = SP(2,0)|(5<<21); /* dmtc0 */ o1 = OP_RRR(r, p->from.reg, 0, p->to.reg); break; case 38: /* movw mr,r */ r = SP(2,0)|(0<<21); /* mfc0 */ if(p->as == AMOVV) r = SP(2,0)|(1<<21); /* dmfc0 */ o1 = OP_RRR(r, p->to.reg, 0, p->from.reg); break; case 39: /* rfe ==> jmp+rfe */ if(aflag) return 0; o1 = OP_RRR(oprrr(AJMP), 0, p->to.reg, REGZERO); o2 = oprrr(p->as); break; case 40: /* word */ if(aflag) return 0; o1 = regoff(&p->to); break; case 41: /* movw r,fcr */ o1 = OP_RRR(SP(2,1)|(2<<21), REGZERO, 0, p->to.reg); /* mfcc1 */ o2 = OP_RRR(SP(2,1)|(6<<21), p->from.reg, 0, p->to.reg);/* mtcc1 */ break; case 42: /* movw fcr,r */ o1 = OP_RRR(SP(2,1)|(2<<21), p->to.reg, 0, p->from.reg);/* mfcc1 */ break; case 45: /* case r */ if(p->link == P) v = p->pc+28; else v = p->link->pc; if(v & (1<<15)) o1 = OP_IRR(opirr(ALAST), (v>>16)+1, REGZERO, REGTMP); else o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP); o2 = OP_SRR(opirr(ASLL), 2, p->from.reg, p->from.reg); o3 = OP_RRR(oprrr(AADD), p->from.reg, REGTMP, REGTMP); o4 = OP_IRR(opirr(AMOVW+ALAST), v, REGTMP, REGTMP); o5 = OP_RRR(oprrr(ANOR), REGZERO, REGZERO, REGZERO); o6 = OP_RRR(oprrr(AJMP), 0, REGTMP, REGZERO); o7 = OP_RRR(oprrr(ANOR), REGZERO, REGZERO, REGZERO); break; case 46: /* bcase $con,lbra */ if(p->cond == P) v = p->pc; else v = p->cond->pc; o1 = v; break; } if(aflag) return o1; v = p->pc; switch(o->size) { default: if(debug['a']) Bprint(&bso, " %.8lux:\t\t%P\n", v, p); break; case 4: if(debug['a']) Bprint(&bso, " %.8lux: %.8lux\t%P\n", v, o1, p); LPUT(o1); break; case 8: if(debug['a']) Bprint(&bso, " %.8lux: %.8lux %.8lux%P\n", v, o1, o2, p); LPUT(o1); LPUT(o2); break; case 12: if(debug['a']) Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux%P\n", v, o1, o2, o3, p); LPUT(o1); LPUT(o2); LPUT(o3); break; case 16: if(debug['a']) Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux%P\n", v, o1, o2, o3, o4, p); LPUT(o1); LPUT(o2); LPUT(o3); LPUT(o4); break; case 20: if(debug['a']) Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux%P\n", v, o1, o2, o3, o4, o5, p); LPUT(o1); LPUT(o2); LPUT(o3); LPUT(o4); LPUT(o5); break; case 28: if(debug['a']) Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux %.8lux %.8lux%P\n", v, o1, o2, o3, o4, o5, o6, o7, p); LPUT(o1); LPUT(o2); LPUT(o3); LPUT(o4); LPUT(o5); LPUT(o6); LPUT(o7); break; } return 0; } int isnop(Prog *p) { if(p->as != ANOR) return 0; if(p->reg != REGZERO && p->reg != NREG) return 0; if(p->from.type != D_REG || p->from.reg != REGZERO) return 0; if(p->to.type != D_REG || p->to.reg != REGZERO) return 0; return 1; } long oprrr(int a) { switch(a) { case AADD: return OP(4,0); case AADDU: return OP(4,1); case ASGT: return OP(5,2); case ASGTU: return OP(5,3); case AAND: return OP(4,4); case AOR: return OP(4,5); case AXOR: return OP(4,6); case ASUB: return OP(4,2); case ASUBU: return OP(4,3); case ANOR: return OP(4,7); case ASLL: return OP(0,4); case ASRL: return OP(0,6); case ASRA: return OP(0,7); case AREM: case ADIV: return OP(3,2); case AREMU: case ADIVU: return OP(3,3); case AMUL: return OP(3,0); case AMULU: return OP(3,1); case AJMP: return OP(1,0); case AJAL: return OP(1,1); case ABREAK: return OP(1,5); case ASYSCALL: return OP(1,4); case ATLBP: return MMU(1,0); case ATLBR: return MMU(0,1); case ATLBWI: return MMU(0,2); case ATLBWR: return MMU(0,6); case ARFE: return MMU(2,0); case ADIVF: return FPF(0,3); case ADIVD: return FPD(0,3); case AMULF: return FPF(0,2); case AMULD: return FPD(0,2); case ASUBF: return FPF(0,1); case ASUBD: return FPD(0,1); case AADDF: return FPF(0,0); case AADDD: return FPD(0,0); case AMOVFW: return FPF(4,4); case AMOVDW: return FPD(4,4); case AMOVWF: return FPW(4,0); case AMOVDF: return FPD(4,0); case AMOVWD: return FPW(4,1); case AMOVFD: return FPF(4,1); case AABSF: return FPF(0,5); case AABSD: return FPD(0,5); case AMOVF: return FPF(0,6); case AMOVD: return FPD(0,6); case ANEGF: return FPF(0,7); case ANEGD: return FPD(0,7); case ACMPEQF: return FPF(6,2); case ACMPEQD: return FPD(6,2); case ACMPGTF: return FPF(7,4); case ACMPGTD: return FPD(7,4); case ACMPGEF: return FPF(7,6); case ACMPGED: return FPD(7,6); case ADIVV: return OP(3,6); case ADIVVU: return OP(3,7); case AADDV: return OP(5,4); case AADDVU: return OP(5,5); } diag("bad rrr %d", a); return 0; } long opirr(int a) { switch(a) { case AADD: return SP(1,0); case AADDU: return SP(1,1); case ASGT: return SP(1,2); case ASGTU: return SP(1,3); case AAND: return SP(1,4); case AOR: return SP(1,5); case AXOR: return SP(1,6); case ALAST: return SP(1,7); case ASLL: return OP(0,0); case ASRL: return OP(0,2); case ASRA: return OP(0,3); case AJMP: return SP(0,2); case AJAL: return SP(0,3); case ABEQ: return SP(0,4); case ABNE: return SP(0,5); case ABGEZ: return SP(0,1)|BCOND(0,1); case ABGEZAL: return SP(0,1)|BCOND(2,1); case ABGTZ: return SP(0,7); case ABLEZ: return SP(0,6); case ABLTZ: return SP(0,1)|BCOND(0,0); case ABLTZAL: return SP(0,1)|BCOND(2,0); case ABFPT: return SP(2,1)|(257<<16); case ABFPF: return SP(2,1)|(256<<16); case AMOVB: case AMOVBU: return SP(5,0); case AMOVH: case AMOVHU: return SP(5,1); case AMOVW: return SP(5,3); case AMOVV: return SP(7,7); case AMOVF: return SP(7,1); case AMOVWL: return SP(5,2); case AMOVWR: return SP(5,6); case AMOVVL: return SP(5,4); case AMOVVR: return SP(5,5); case ABREAK: return SP(5,7); case AMOVWL+ALAST: return SP(4,2); case AMOVWR+ALAST: return SP(4,6); case AMOVVL+ALAST: return SP(3,2); case AMOVVR+ALAST: return SP(3,3); case AMOVB+ALAST: return SP(4,0); case AMOVBU+ALAST: return SP(4,4); case AMOVH+ALAST: return SP(4,1); case AMOVHU+ALAST: return SP(4,5); case AMOVW+ALAST: return SP(4,3); case AMOVV+ALAST: return SP(6,7); case AMOVF+ALAST: return SP(6,1); case ASLLV: return OP(7,0); case ASRLV: return OP(7,2); case ASRAV: return OP(7,3); case ASLLV+ALAST: return OP(7,4); case ASRLV+ALAST: return OP(7,6); case ASRAV+ALAST: return OP(7,7); case AADDV: return SP(3,0); case AADDVU: return SP(3,1); } diag("bad irr %d", a); abort(); return 0; } int vshift(int a) { switch(a){ case ASLLV: return 1; case ASRLV: return 1; case ASRAV: return 1; } return 0; }