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5l: delete dead code

Browse Source 
Thumb code and ARM pre-V4 code is unused,
unmaintained, and almost certainly wrong by now.
Every time I try to change 5l I have to sort out
what's dead code and what's not.

30% of lines of code in this directory deleted.

R=ken2
CC=golang-dev
https://golang.org/cl/4601049
This commit is contained in:
Russ Cox 2011-06-09 18:07:56 -04:00
parent 2ac375b2df
commit 3e57d7f7bf
12 changed files with 71 additions and 2429 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/cmd/5l/5.out.h
View File

@ -53,8 +53,6 @@
#define REGLINK 14
#define REGPC 15
#define REGTMPT 7 /* used by the loader for thumb code */
#define NFREG 8
#define FREGRET 0
#define FREGEXT 7

1
src/cmd/5l/Makefile
View File

@ -22,7 +22,6 @@ OFILES=\
optab.$O\
pass.$O\
prof.$O\
thumb.$O\
softfloat.$O\
span.$O\
symtab.$O\

83
src/cmd/5l/asm.c
View File

@ -377,7 +377,6 @@ asmb(void)
// Bprint(&bso, "%5.2f dwarf\n", cputime());
// dwarfemitdebugsections();
}
asmthumbmap();
cflush();
}
@ -728,59 +727,6 @@ nopstat(char *f, Count *c)
(double)(c->outof - c->count)/c->outof);
}
static void
outt(int32 f, int32 l)
{
if(debug['L'])
Bprint(&bso, "tmap: %ux-%ux\n", f, l);
lput(f);
lput(l);
}
void
asmthumbmap(void)
{
int32 pc, lastt;
Prog *p;
if(!seenthumb)
return;
pc = 0;
lastt = -1;
for(cursym = textp; cursym != nil; cursym = cursym->next) {
p = cursym->text;
pc = p->pc - INITTEXT;
setarch(p);
if(thumb){
if(p->from.sym->foreign){ // 8 bytes of ARM first
if(lastt >= 0){
outt(lastt, pc-1);
lastt = -1;
}
pc += 8;
}
if(lastt < 0)
lastt = pc;
}
else{
if(p->from.sym->foreign){ // 4 bytes of THUMB first
if(lastt < 0)
lastt = pc;
pc += 4;
}
if(lastt >= 0){
outt(lastt, pc-1);
lastt = -1;
}
}
if(cursym->next == nil)
for(; p != P; p = p->link)
pc = p->pc = INITTEXT;
}
if(lastt >= 0)
outt(lastt, pc+1);
}
void
asmout(Prog *p, Optab *o, int32 *out)
{
@ -804,7 +750,7 @@ if(debug['P']) print("%ux: %P type %d\n", (uint32)(p->pc), p, o->type);
break;
case 0: /* pseudo ops */
if(debug['G']) print("%ux: %s: arm %d %d %d\n", (uint32)(p->pc), p->from.sym->name, p->from.sym->thumb, p->from.sym->foreign, p->from.sym->fnptr);
if(debug['G']) print("%ux: %s: arm %d\n", (uint32)(p->pc), p->from.sym->name, p->from.sym->fnptr);
break;
case 1: /* op R,[R],R */
@ -868,10 +814,6 @@ if(debug['G']) print("%ux: %s: arm %d %d %d\n", (uint32)(p->pc), p->from.sym->na
v = -8;
if(p->cond != P)
v = (p->cond->pc - pc) - 8;
#ifdef CALLEEBX
if(p->as == ABL)
v += fninc(p->to.sym);
#endif
o1 = opbra(p->as, p->scond);
o1 |= (v >> 2) & 0xffffff;
break;
@ -1328,19 +1270,7 @@ if(debug['G']) print("%ux: %s: arm %d %d %d\n", (uint32)(p->pc), p->from.sym->na
o2 ^= (1<<6);
break;
case 74: /* bx $I */
#ifdef CALLEEBX
diag("bx $i case (arm)");
#endif
if(!seenthumb)
diag("ABX $I and seenthumb==0");
v = p->cond->pc;
if(p->to.sym->thumb)
v |= 1; // T bit
o1 = olr(8, REGPC, REGTMP, p->scond&C_SCOND); // mov 8(PC), Rtmp
o2 = oprrr(AADD, p->scond) | immrot(8) | (REGPC<<16) | (REGLINK<<12); // add 8,PC, LR
o3 = ((p->scond&C_SCOND)<<28) | (0x12fff<<8) | (1<<4) | REGTMP; // bx Rtmp
o4 = opbra(AB, 14); // B over o6
o5 = v;
diag("ABX $I");
break;
case 75: /* bx O(R) */
aclass(&p->to);
@ -1359,14 +1289,7 @@ if(debug['G']) print("%ux: %s: arm %d %d %d\n", (uint32)(p->pc), p->from.sym->na
o3 = ((p->scond&C_SCOND)<<28) | (0x12fff<<8) | (1<<4) | REGTMP; // BX Rtmp
break;
case 76: /* bx O(R) when returning from fn*/
if(!seenthumb)
diag("ABXRET and seenthumb==0");
aclass(&p->to);
// print("ARM BXRET %d(R%d)\n", instoffset, p->to.reg);
if(instoffset != 0)
diag("non-zero offset in ABXRET");
// o1 = olr(instoffset, p->to.reg, REGTMP, p->scond); // mov O(R), Rtmp
o1 = ((p->scond&C_SCOND)<<28) | (0x12fff<<8) | (1<<4) | p->to.reg; // BX R
diag("ABXRET");
break;
case 77: /* ldrex oreg,reg */
aclass(&p->from);

25
src/cmd/5l/l.h
View File

@ -144,8 +144,6 @@ struct Sym
int32 sig;
int32 size;
uchar special;
uchar thumb; // thumb code
uchar foreign; // called by arm if thumb, by thumb if arm
uchar fnptr; // used as fn ptr
Sym* hash; // in hash table
Sym* allsym; // in all symbol list
@ -208,7 +206,6 @@ enum
LFROM = 1<<0,
LTO = 1<<1,
LPOOL = 1<<2,
V4 = 1<<3, /* arm v4 arch */
C_NONE = 0,
C_REG,
@ -221,21 +218,16 @@ enum
C_RCON, /* 0xff rotated */
C_NCON, /* ~RCON */
C_SCON, /* 0xffff */
C_BCON, /* thumb */
C_LCON,
C_ZFCON,
C_SFCON,
C_LFCON,
C_GCON, /* thumb */
C_RACON,
C_SACON, /* thumb */
C_LACON,
C_GACON, /* thumb */
C_SBRA,
C_LBRA,
C_GBRA, /* thumb */
C_HAUTO, /* halfword insn offset (-0xff to 0xff) */
C_FAUTO, /* float insn offset (0 to 0x3fc, word aligned) */
@ -250,12 +242,10 @@ enum
C_ROREG,
C_SROREG, /* both S and R */
C_LOREG,
C_GOREG, /* thumb */
C_PC,
C_SP,
C_HREG,
C_OFFPC, /* thumb */
C_ADDR, /* reference to relocatable address */
@ -287,9 +277,6 @@ EXTERN union
#define cbuf u.obuf
#define xbuf u.ibuf
#define setarch(p) if((p)->as==ATEXT) thumb=(p)->reg&ALLTHUMBS
#define setthumb(p) if((p)->as==ATEXT) seenthumb|=(p)->reg&ALLTHUMBS
#ifndef COFFCVT
EXTERN int32 HEADR; /* length of header */
@ -319,7 +306,6 @@ EXTERN int nerrors;
EXTERN int32 instoffset;
EXTERN Opcross opcross[8];
EXTERN Oprang oprange[ALAST];
EXTERN Oprang thumboprange[ALAST];
EXTERN char* outfile;
EXTERN int32 pc;
EXTERN uchar repop[ALAST];
@ -333,14 +319,10 @@ EXTERN int version;
EXTERN char xcmp[C_GOK+1][C_GOK+1];
EXTERN Prog zprg;
EXTERN int dtype;
EXTERN int armv4;
EXTERN int thumb;
EXTERN int seenthumb;
EXTERN int armsize;
extern char* anames[];
extern Optab optab[];
extern Optab thumboptab[];
void addpool(Prog*, Adr*);
EXTERN Prog* blitrl;
@ -368,17 +350,13 @@ int Oconv(Fmt*);
int Pconv(Fmt*);
int Sconv(Fmt*);
int aclass(Adr*);
int thumbaclass(Adr*, Prog*);
void addhist(int32, int);
Prog* appendp(Prog*);
void asmb(void);
void asmthumbmap(void);
void asmout(Prog*, Optab*, int32*);
void thumbasmout(Prog*, Optab*);
int32 atolwhex(char*);
Prog* brloop(Prog*);
void buildop(void);
void thumbbuildop(void);
void buildrep(int, int);
void cflush(void);
int chipzero(Ieee*);
@ -442,9 +420,6 @@ int32 immaddr(int32);
int32 opbra(int, int);
int brextra(Prog*);
int isbranch(Prog*);
int fnpinc(Sym *);
int fninc(Sym *);
void thumbcount(void);
void fnptrs(void);
void doelf(void);

7
src/cmd/5l/list.c
View File

@ -412,7 +412,6 @@ static char*
cnames[] =
{
[C_ADDR] = "C_ADDR",
[C_BCON] = "C_BCON",
[C_FAUTO] = "C_FAUTO",
[C_ZFCON] = "C_SFCON",
[C_SFCON] = "C_SFCON",
@ -420,11 +419,7 @@ cnames[] =
[C_FCR] = "C_FCR",
[C_FOREG] = "C_FOREG",
[C_FREG] = "C_FREG",
[C_GACON] = "C_GACON",
[C_GBRA] = "C_GBRA",
[C_GCON] = "C_GCON",
[C_GOK] = "C_GOK",
[C_GOREG] = "C_GOREG",
[C_HAUTO] = "C_HAUTO",
[C_HFAUTO] = "C_HFAUTO",
[C_HFOREG] = "C_HFOREG",
@ -437,7 +432,6 @@ cnames[] =
[C_LOREG] = "C_LOREG",
[C_NCON] = "C_NCON",
[C_NONE] = "C_NONE",
[C_OFFPC] = "C_OFFPC",
[C_PC] = "C_PC",
[C_PSR] = "C_PSR",
[C_RACON] = "C_RACON",
@ -445,7 +439,6 @@ cnames[] =
[C_REG] = "C_REG",
[C_REGREG] = "C_REGREG",
[C_ROREG] = "C_ROREG",
[C_SACON] = "C_SACON",
[C_SAUTO] = "C_SAUTO",
[C_SBRA] = "C_SBRA",
[C_SCON] = "C_SCON",

365
src/cmd/5l/noop.c
View File

@ -47,74 +47,11 @@ static Sym* sym_modu;
static void setdiv(int);
static Prog *
movrr(Prog *q, int rs, int rd, Prog *p)
{
if(q == nil)
q = prg();
q->as = AMOVW;
q->line = p->line;
q->from.type = D_REG;
q->from.reg = rs;
q->to.type = D_REG;
q->to.reg = rd;
q->link = p->link;
return q;
}
static Prog *
fnret(Prog *q, int rs, int foreign, Prog *p)
{
q = movrr(q, rs, REGPC, p);
if(foreign){ // BX rs
q->as = ABXRET;
q->from.type = D_NONE;
q->from.reg = NREG;
q->to.reg = rs;
}
return q;
}
static Prog *
aword(int32 w, Prog *p)
{
Prog *q;
q = prg();
q->as = AWORD;
q->line = p->line;
q->from.type = D_NONE;
q->reg = NREG;
q->to.type = D_CONST;
q->to.offset = w;
q->link = p->link;
p->link = q;
return q;
}
static Prog *
adword(int32 w1, int32 w2, Prog *p)
{
Prog *q;
q = prg();
q->as = ADWORD;
q->line = p->line;
q->from.type = D_CONST;
q->from.offset = w1;
q->reg = NREG;
q->to.type = D_CONST;
q->to.offset = w2;
q->link = p->link;
p->link = q;
return q;
}
void
noops(void)
{
Prog *p, *q, *q1, *q2;
int o, foreign;
Prog *p, *q, *q1;
int o;
Prog *pmorestack;
Sym *symmorestack;
@ -140,8 +77,6 @@ noops(void)
q = P;
for(cursym = textp; cursym != nil; cursym = cursym->next) {
for(p = cursym->text; p != P; p = p->link) {
setarch(p);
switch(p->as) {
case ATEXT:
p->mark |= LEAF;
@ -206,7 +141,6 @@ noops(void)
for(cursym = textp; cursym != nil; cursym = cursym->next) {
for(p = cursym->text; p != P; p = p->link) {
setarch(p);
o = p->as;
switch(o) {
case ATEXT:
@ -224,54 +158,12 @@ noops(void)
Bflush(&bso);
cursym->text->mark |= LEAF;
}
#ifdef CALLEEBX
if(p->from.sym->foreign){
if(thumb)
// don't allow literal pool to separate these
p = adword(0xe28f7001, 0xe12fff17, p); // arm add 1, pc, r7 and bx r7
// p = aword(0xe12fff17, aword(0xe28f7001, p)); // arm add 1, pc, r7 and bx r7
else
p = aword(0x4778, p); // thumb bx pc and 2 bytes padding
}
#endif
if(cursym->text->mark & LEAF) {
cursym->leaf = 1;
if(!autosize)
break;
}
if(thumb){
if(!(p->reg & NOSPLIT))
diag("stack splitting not supported in thumb");
if(!(cursym->text->mark & LEAF)){
q = movrr(nil, REGLINK, REGTMPT-1, p);
p->link = q;
q1 = prg();
q1->as = AMOVW;
q1->line = p->line;
q1->from.type = D_REG;
q1->from.reg = REGTMPT-1;
q1->to.type = D_OREG;
q1->to.name = D_NONE;
q1->to.reg = REGSP;
q1->to.offset = 0;
q1->link = q->link;
q->link = q1;
}
if(autosize){
q2 = prg();
q2->as = ASUB;
q2->line = p->line;
q2->from.type = D_CONST;
q2->from.offset = autosize;
q2->to.type = D_REG;
q2->to.reg = REGSP;
q2->link = p->link;
p->link = q2;
}
break;
}
if(p->reg & NOSPLIT) {
q1 = prg();
q1->as = AMOVW;
@ -432,16 +324,9 @@ noops(void)
case ARET:
nocache(p);
foreign = seenthumb && (cursym->foreign || cursym->fnptr);
// print("%s %d %d\n", cursym->name, cursym->foreign, cursym->fnptr);
if(cursym->text->mark & LEAF) {
if(!autosize) {
if(thumb){
p = fnret(p, REGLINK, foreign, p);
break;
}
// if(foreign) print("ABXRET 1 %s\n", cursym->name);
p->as = foreign ? ABXRET : AB;
p->as = AB;
p->from = zprg.from;
p->to.type = D_OREG;
p->to.offset = 0;
@ -449,84 +334,6 @@ noops(void)
break;
}
}
if(thumb){
diag("thumb not maintained");
errorexit();
if(cursym->text->mark & LEAF){
if(autosize){
p->as = AADD;
p->from.type = D_CONST;
p->from.offset = autosize;
p->to.type = D_REG;
p->to.reg = REGSP;
q = nil;
}
else
q = p;
q = fnret(q, REGLINK, foreign, p);
if(q != p)
p->link = q;
}
else{
p->as = AMOVW;
p->from.type = D_OREG;
p->from.name = D_NONE;
p->from.reg = REGSP;
p->from.offset = 0;
p->to.type = D_REG;
p->to.reg = REGTMPT-1;
if(autosize){
q = prg();
q->as = AADD;
q->from.type = D_CONST;
q->from.offset = autosize;
q->to.type = D_REG;
q->to.reg = REGSP;
q->link = p->link;
p->link = q;
}
else
q = p;
q1 = fnret(nil, REGTMPT-1, foreign, p);
q1->link = q->link;
q->link = q1;
}
break;
}
if(foreign) {
diag("foreign not maintained");
errorexit();
// if(foreign) print("ABXRET 3 %s\n", cursym->name);
#define R 1
p->as = AMOVW;
p->from.type = D_OREG;
p->from.name = D_NONE;
p->from.reg = REGSP;
p->from.offset = 0;
p->to.type = D_REG;
p->to.reg = R;
q = prg();
q->as = AADD;
q->scond = p->scond;
q->line = p->line;
q->from.type = D_CONST;
q->from.offset = autosize;
q->to.type = D_REG;
q->to.reg = REGSP;
q->link = p->link;
p->link = q;
q1 = prg();
q1->as = ABXRET;
q1->scond = p->scond;
q1->line = p->line;
q1->to.type = D_OREG;
q1->to.offset = 0;
q1->to.reg = R;
q1->link = q->link;
q->link = q1;
#undef R
}
else {
p->as = AMOVW;
p->scond |= C_PBIT;
p->from.type = D_OREG;
@ -537,7 +344,6 @@ noops(void)
// If there are instructions following
// this ARET, they come from a branch
// with the same stackframe, so no spadj.
}
break;
case AADD:
@ -589,7 +395,7 @@ noops(void)
if(q1->reg == NREG)
p->from.reg = q1->to.reg;
p->to.type = D_REG;
p->to.reg = prog_div->from.sym->thumb ? REGTMPT : REGTMP;
p->to.reg = REGTMP;
p->to.offset = 0;
/* CALL appropriate */
@ -598,14 +404,7 @@ noops(void)
p->link = q;
p = q;
#ifdef CALLEEBX
p->as = ABL;
#else
if(prog_div->from.sym->thumb)
p->as = thumb ? ABL : ABX;
else
p->as = thumb ? ABX : ABL;
#endif
p->line = q1->line;
p->to.type = D_BRANCH;
p->cond = p;
@ -637,7 +436,7 @@ noops(void)
p->as = AMOVW;
p->line = q1->line;
p->from.type = D_REG;
p->from.reg = prog_div->from.sym->thumb ? REGTMPT : REGTMP;
p->from.reg = REGTMP;
p->from.offset = 0;
p->to.type = D_REG;
p->to.reg = q1->to.reg;
@ -669,12 +468,6 @@ noops(void)
break;
case AMOVW:
if(thumb){
Adr *a = &p->from;
if(a->type == D_CONST && ((a->name == D_NONE && a->reg == REGSP) || a->name == D_AUTO || a->name == D_PARAM) && (a->offset & 3))
diag("SP offset not multiple of 4");
}
if((p->scond & C_WBIT) && p->to.type == D_OREG && p->to.reg == REGSP)
p->spadj = -p->to.offset;
if((p->scond & C_PBIT) && p->from.type == D_OREG && p->from.reg == REGSP && p->to.reg != REGPC)
@ -682,136 +475,6 @@ noops(void)
if(p->from.type == D_CONST && p->from.reg == REGSP && p->to.type == D_REG && p->to.reg == REGSP)
p->spadj = -p->from.offset;
break;
case AMOVB:
case AMOVBU:
case AMOVH:
case AMOVHU:
if(thumb){
if(p->from.type == D_OREG && (p->from.name == D_AUTO || p->from.name == D_PARAM || (p->from.name == D_CONST && p->from.reg == REGSP))){
q = prg();
*q = *p;
if(p->from.name == D_AUTO)
q->from.offset += autosize;
else if(p->from.name == D_PARAM)
q->from.offset += autosize+4;
q->from.name = D_NONE;
q->from.reg = REGTMPT;
p = movrr(p, REGSP, REGTMPT, p);
q->link = p->link;
p->link = q;
}
if(p->to.type == D_OREG && (p->to.name == D_AUTO || p->to.name == D_PARAM || (p->to.name == D_CONST && p->to.reg == REGSP))){
q = prg();
*q = *p;
if(p->to.name == D_AUTO)
q->to.offset += autosize;
else if(p->to.name == D_PARAM)
q->to.offset += autosize+4;
q->to.name = D_NONE;
q->to.reg = REGTMPT;
p = movrr(p, REGSP, REGTMPT, p);
q->link = p->link;
p->link = q;
if(q->to.offset < 0 || q->to.offset > 255){ // complicated
p->to.reg = REGTMPT+1; // mov sp, r8
q1 = prg();
q1->line = p->line;
q1->as = AMOVW;
q1->from.type = D_CONST;
q1->from.offset = q->to.offset;
q1->to.type = D_REG;
q1->to.reg = REGTMPT; // mov $o, r7
p->link = q1;
q1->link = q;
q1 = prg();
q1->line = p->line;
q1->as = AADD;
q1->from.type = D_REG;
q1->from.reg = REGTMPT+1;
q1->to.type = D_REG;
q1->to.reg = REGTMPT; // add r8, r7
p->link->link = q1;
q1->link = q;
q->to.offset = 0; // mov* r, 0(r7)
/* phew */
}
}
}
break;
case AMOVM:
if(thumb){
if(p->from.type == D_OREG){
if(p->from.offset == 0)
p->from.type = D_REG;
else
diag("non-zero AMOVM offset");
}
else if(p->to.type == D_OREG){
if(p->to.offset == 0)
p->to.type = D_REG;
else
diag("non-zero AMOVM offset");
}
}
break;
case AB:
if(thumb && p->to.type == D_OREG){
if(p->to.offset == 0){
p->as = AMOVW;
p->from.type = D_REG;
p->from.reg = p->to.reg;
p->to.type = D_REG;
p->to.reg = REGPC;
}
else{
p->as = AADD;
p->from.type = D_CONST;
p->from.offset = p->to.offset;
p->reg = p->to.reg;
p->to.type = D_REG;
p->to.reg = REGTMPT-1;
q = prg();
q->as = AMOVW;
q->line = p->line;
q->from.type = D_REG;
q->from.reg = REGTMPT-1;
q->to.type = D_REG;
q->to.reg = REGPC;
q->link = p->link;
p->link = q;
}
}
if(seenthumb && !thumb && p->to.type == D_OREG && p->to.reg == REGLINK){
// print("warn %s: b (R%d) assuming a return\n", cursym->name, p->to.reg);
p->as = ABXRET;
}
break;
case ABL:
case ABX:
if(thumb && p->to.type == D_OREG){
if(p->to.offset == 0){
p->as = o;
p->from.type = D_NONE;
p->to.type = D_REG;
}
else{
p->as = AADD;
p->from.type = D_CONST;
p->from.offset = p->to.offset;
p->reg = p->to.reg;
p->to.type = D_REG;
p->to.reg = REGTMPT-1;
q = prg();
q->as = o;
q->line = p->line;
q->from.type = D_NONE;
q->to.type = D_REG;
q->to.reg = REGTMPT-1;
q->link = p->link;
p->link = q;
}
}
break;
}
}
}
@ -876,13 +539,19 @@ setdiv(int as)
Prog *p = nil;
switch(as){
case ADIV: p = prog_div; break;
case ADIVU: p = prog_divu; break;
case AMOD: p = prog_mod; break;
case AMODU: p = prog_modu; break;
case ADIV:
p = prog_div;
break;
case ADIVU:
p = prog_divu;
break;
case AMOD:
p = prog_mod;
break;
case AMODU:
p = prog_modu;
break;
}
if(thumb != p->from.sym->thumb)
p->from.sym->foreign = 1;
}
void

27
src/cmd/5l/obj.c
View File

@ -242,7 +242,6 @@ main(int argc, char *argv[])
zprg.from.reg = NREG;
zprg.to = zprg.from;
buildop();
thumbbuildop(); // could build on demand
histgen = 0;
pc = 0;
dtype = 4;
@ -286,10 +285,8 @@ main(int argc, char *argv[])
asmb();
undef();
if(debug['c']){
thumbcount();
if(debug['c'])
print("ARM size = %d\n", armsize);
}
if(debug['v']) {
Bprint(&bso, "%5.2f cpu time\n", cputime());
Bprint(&bso, "%d sizeof adr\n", sizeof(Adr));
@ -406,8 +403,6 @@ nopout(Prog *p)
p->to.type = D_NONE;
}
static void puntfp(Prog *);
void
ldobj1(Biobuf *f, char *pkg, int64 len, char *pn)
{
@ -622,8 +617,6 @@ loop:
else
textp = s;
etextp = s;
setarch(p);
setthumb(p);
p->align = 4;
autosize = (p->to.offset+3L) & ~3L;
p->to.offset = autosize;
@ -631,7 +624,6 @@ loop:
s->type = STEXT;
s->text = p;
s->value = pc;
s->thumb = thumb;
lastp = p;
p->pc = pc;
pc++;
@ -673,13 +665,9 @@ loop:
case AMULD:
case ADIVF:
case ADIVD:
if(thumb)
puntfp(p);
goto casedef;
case AMOVF:
if(thumb)
puntfp(p);
if(skip)
goto casedef;
@ -701,8 +689,6 @@ loop:
goto casedef;
case AMOVD:
if(thumb)
puntfp(p);
if(skip)
goto casedef;
@ -758,17 +744,6 @@ prg(void)
return p;
}
static void
puntfp(Prog *p)
{
USED(p);
/* floating point - punt for now */
cursym->text->reg = NREG; /* ARM */
cursym->thumb = 0;
thumb = 0;
// print("%s: generating ARM code (contains floating point ops %d)\n", curtext->from.sym->name, p->line);
}
Prog*
appendp(Prog *q)
{

51
src/cmd/5l/optab.c
View File

@ -77,7 +77,6 @@ Optab optab[] =
{ ASWI, C_NONE, C_NONE, C_LCON, 10, 4, 0 },
{ AWORD, C_NONE, C_NONE, C_LCON, 11, 4, 0 },
{ AWORD, C_NONE, C_NONE, C_GCON, 11, 4, 0 },
{ AWORD, C_NONE, C_NONE, C_ADDR, 11, 4, 0 },
{ AMOVW, C_NCON, C_NONE, C_REG, 12, 4, 0 },
@ -181,34 +180,34 @@ Optab optab[] =
{ ACASE, C_REG, C_NONE, C_NONE, 62, 4, 0 },
{ ABCASE, C_NONE, C_NONE, C_SBRA, 63, 4, 0 },
{ AMOVH, C_REG, C_NONE, C_HAUTO, 70, 4, REGSP, V4 },
{ AMOVH, C_REG, C_NONE, C_HOREG, 70, 4, 0, V4 },
{ AMOVHU, C_REG, C_NONE, C_HAUTO, 70, 4, REGSP, V4 },
{ AMOVHU, C_REG, C_NONE, C_HOREG, 70, 4, 0, V4 },
{ AMOVH, C_REG, C_NONE, C_HAUTO, 70, 4, REGSP, 0 },
{ AMOVH, C_REG, C_NONE, C_HOREG, 70, 4, 0, 0 },
{ AMOVHU, C_REG, C_NONE, C_HAUTO, 70, 4, REGSP, 0 },
{ AMOVHU, C_REG, C_NONE, C_HOREG, 70, 4, 0, 0 },
{ AMOVB, C_HAUTO,C_NONE, C_REG, 71, 4, REGSP, V4 },
{ AMOVB, C_HOREG,C_NONE, C_REG, 71, 4, 0, V4 },
{ AMOVH, C_HAUTO,C_NONE, C_REG, 71, 4, REGSP, V4 },
{ AMOVH, C_HOREG,C_NONE, C_REG, 71, 4, 0, V4 },
{ AMOVHU, C_HAUTO,C_NONE, C_REG, 71, 4, REGSP, V4 },
{ AMOVHU, C_HOREG,C_NONE, C_REG, 71, 4, 0, V4 },
{ AMOVB, C_HAUTO,C_NONE, C_REG, 71, 4, REGSP, 0 },
{ AMOVB, C_HOREG,C_NONE, C_REG, 71, 4, 0, 0 },
{ AMOVH, C_HAUTO,C_NONE, C_REG, 71, 4, REGSP, 0 },
{ AMOVH, C_HOREG,C_NONE, C_REG, 71, 4, 0, 0 },
{ AMOVHU, C_HAUTO,C_NONE, C_REG, 71, 4, REGSP, 0 },
{ AMOVHU, C_HOREG,C_NONE, C_REG, 71, 4, 0, 0 },
{ AMOVH, C_REG, C_NONE, C_LAUTO, 72, 8, REGSP, LTO|V4 },
{ AMOVH, C_REG, C_NONE, C_LOREG, 72, 8, 0, LTO|V4 },
{ AMOVH, C_REG, C_NONE, C_ADDR, 94, 8, 0, LTO|V4 },
{ AMOVHU, C_REG, C_NONE, C_LAUTO, 72, 8, REGSP, LTO|V4 },
{ AMOVHU, C_REG, C_NONE, C_LOREG, 72, 8, 0, LTO|V4 },
{ AMOVHU, C_REG, C_NONE, C_ADDR, 94, 8, 0, LTO|V4 },
{ AMOVH, C_REG, C_NONE, C_LAUTO, 72, 8, REGSP, LTO },
{ AMOVH, C_REG, C_NONE, C_LOREG, 72, 8, 0, LTO },
{ AMOVH, C_REG, C_NONE, C_ADDR, 94, 8, 0, LTO },
{ AMOVHU, C_REG, C_NONE, C_LAUTO, 72, 8, REGSP, LTO },
{ AMOVHU, C_REG, C_NONE, C_LOREG, 72, 8, 0, LTO },
{ AMOVHU, C_REG, C_NONE, C_ADDR, 94, 8, 0, LTO },
{ AMOVB, C_LAUTO,C_NONE, C_REG, 73, 8, REGSP, LFROM|V4 },
{ AMOVB, C_LOREG,C_NONE, C_REG, 73, 8, 0, LFROM|V4 },
{ AMOVB, C_ADDR, C_NONE, C_REG, 93, 8, 0, LFROM|V4 },
{ AMOVH, C_LAUTO,C_NONE, C_REG, 73, 8, REGSP, LFROM|V4 },
{ AMOVH, C_LOREG,C_NONE, C_REG, 73, 8, 0, LFROM|V4 },
{ AMOVH, C_ADDR, C_NONE, C_REG, 93, 8, 0, LFROM|V4 },
{ AMOVHU, C_LAUTO,C_NONE, C_REG, 73, 8, REGSP, LFROM|V4 },
{ AMOVHU, C_LOREG,C_NONE, C_REG, 73, 8, 0, LFROM|V4 },
{ AMOVHU, C_ADDR, C_NONE, C_REG, 93, 8, 0, LFROM|V4 },
{ AMOVB, C_LAUTO,C_NONE, C_REG, 73, 8, REGSP, LFROM },
{ AMOVB, C_LOREG,C_NONE, C_REG, 73, 8, 0, LFROM },
{ AMOVB, C_ADDR, C_NONE, C_REG, 93, 8, 0, LFROM },
{ AMOVH, C_LAUTO,C_NONE, C_REG, 73, 8, REGSP, LFROM },
{ AMOVH, C_LOREG,C_NONE, C_REG, 73, 8, 0, LFROM },
{ AMOVH, C_ADDR, C_NONE, C_REG, 93, 8, 0, LFROM },
{ AMOVHU, C_LAUTO,C_NONE, C_REG, 73, 8, REGSP, LFROM },
{ AMOVHU, C_LOREG,C_NONE, C_REG, 73, 8, 0, LFROM },
{ AMOVHU, C_ADDR, C_NONE, C_REG, 93, 8, 0, LFROM },
{ ALDREX, C_SOREG,C_NONE, C_REG, 77, 4, 0 },
{ ASTREX, C_SOREG,C_REG, C_REG, 78, 4, 0 },

20
src/cmd/5l/pass.c
View File

@ -100,7 +100,6 @@ xfol(Prog *p, Prog **last)
loop:
if(p == P)
return;
setarch(p);
a = p->as;
if(a == AB) {
q = p->cond;
@ -210,14 +209,7 @@ patch(void)
vexit = s->value;
for(cursym = textp; cursym != nil; cursym = cursym->next) {
for(p = cursym->text; p != P; p = p->link) {
setarch(p);
a = p->as;
if(seenthumb && a == ABL){
// if((s = p->to.sym) != S && (s1 = curtext->from.sym) != S)
// print("%s calls %s\n", s1->name, s->name);
if((s = p->to.sym) != S && s->thumb != cursym->thumb)
s->foreign = 1;
}
if((a == ABL || a == ABX || a == AB || a == ARET) &&
p->to.type != D_BRANCH && p->to.sym != S) {
s = p->to.sym;
@ -254,19 +246,7 @@ patch(void)
for(cursym = textp; cursym != nil; cursym = cursym->next) {
for(p = cursym->text; p != P; p = p->link) {
setarch(p);
a = p->as;
if(seenthumb && a == ABL) {
#ifdef CALLEEBX
if(0)
{}
#else
if((s = p->to.sym) != S && (s->foreign || s->fnptr))
p->as = ABX;
#endif
else if(p->to.type == D_OREG)
p->as = ABX;
}
if(p->cond != P) {
p->cond = brloop(p->cond);
if(p->cond != P)

9
src/cmd/5l/prof.c
View File

@ -47,7 +47,6 @@ doprof1(void)
s = lookup("__mcount", 0);
n = 1;
for(p = firstp->link; p != P; p = p->link) {
setarch(p);
if(p->as == ATEXT) {
q = prg();
q->line = p->line;
@ -74,7 +73,7 @@ doprof1(void)
p->from.sym = s;
p->from.offset = n*4 + 4;
p->to.type = D_REG;
p->to.reg = thumb ? REGTMPT : REGTMP;
p->to.reg = REGTMP;
q = prg();
q->line = p->line;
@ -86,7 +85,7 @@ doprof1(void)
p->from.type = D_CONST;
p->from.offset = 1;
p->to.type = D_REG;
p->to.reg = thumb ? REGTMPT : REGTMP;
p->to.reg = REGTMP;
q = prg();
q->line = p->line;
@ -96,7 +95,7 @@ doprof1(void)
p = q;
p->as = AMOVW;
p->from.type = D_REG;
p->from.reg = thumb ? REGTMPT : REGTMP;
p->from.reg = REGTMP;
p->to.type = D_OREG;
p->to.name = D_EXTERN;
p->to.sym = s;
@ -143,7 +142,6 @@ doprof2(void)
ps4 = P;
for(cursym = textp; cursym != nil; cursym = cursym->next) {
p = cursym->text;
setarch(p);
if(cursym == s2) {
ps2 = p;
p->reg = 1;
@ -155,7 +153,6 @@ doprof2(void)
}
for(cursym = textp; cursym != nil; cursym = cursym->next)
for(p = cursym->text; p != P; p = p->link) {
setarch(p);
if(p->as == ATEXT) {
if(p->reg & NOPROF) {
for(;;) {

226
src/cmd/5l/span.c
View File

@ -49,86 +49,6 @@ isbranch(Prog *p)
return (as >= ABEQ && as <= ABLE) || as == AB || as == ABL || as == ABX;
}
static int
ispad(Prog *p)
{
if(p->as != AMOVW)
return 0;
if(p->from.type != D_REG || p->from.reg != REGTMP)
return 0;
if(p->to.type != D_REG || p->to.reg != REGTMP)
return 0;
return 1;
}
int
fninc(Sym *s)
{
if(thumb){
if(s->thumb){
if(s->foreign)
return 8;
else
return 0;
}
else{
if(s->foreign)
return 0;
else
diag("T A !foreign in fninc");
}
}
else{
if(s->thumb){
if(s->foreign)
return 0;
else
diag("A T !foreign in fninc");
}
else{
if(s->foreign)
return 4;
else
return 0;
}
}
return 0;
}
int
fnpinc(Sym *s)
{
if(!s->fnptr){ // a simplified case BX O(R) -> BL O(R)
if(!debug['f'])
diag("fnptr == 0 in fnpinc");
if(s->foreign)
diag("bad usage in fnpinc %s %d %d", s->name, s->foreign, s->thumb);
return 0;
}
/* 0, 1, 2, 3 squared */
if(s->thumb)
return s->foreign ? 9 : 1;
else
return s->foreign ? 4 : 0;
}
static Prog *
pad(Prog *p, int pc)
{
Prog *q;
q = prg();
q->as = AMOVW;
q->line = p->line;
q->from.type = D_REG;
q->from.reg = REGTMP;
q->to.type = D_REG;
q->to.reg = REGTMP;
q->pc = pc;
q->link = p->link;
return q;
}
static int
scan(Prog *op, Prog *p, int c)
{
@ -182,7 +102,6 @@ span(void)
otxt = c;
for(cursym = textp; cursym != nil; cursym = cursym->next) {
p = cursym->text;
setarch(p);
p->pc = c;
cursym->value = c;
@ -193,19 +112,14 @@ span(void)
if(c-otxt >= 1L<<17)
bflag = 1;
otxt = c;
if(thumb && blitrl)
pool.extra += brextra(p);
for(op = p, p = p->link; p != P; op = p, p = p->link) {
curp = p;
setarch(p);
p->pc = c;
o = oplook(p);
m = o->size;
// must check literal pool here in case p generates many instructions
if(blitrl){
if(thumb && isbranch(p))
pool.extra += brextra(p);
if(checkpool(op, p->as == ACASE ? casesz(p) : m))
c = p->pc = scan(op, p, c);
}
@ -230,8 +144,6 @@ span(void)
c += m;
}
if(blitrl){
if(thumb && isbranch(op))
pool.extra += brextra(op);
if(checkpool(op, 0))
c = scan(op, P, c);
}
@ -253,10 +165,7 @@ span(void)
cursym->value = c;
for(p = cursym->text; p != P; p = p->link) {
curp = p;
setarch(p);
p->pc = c;
if(thumb && isbranch(p))
nocache(p);
o = oplook(p);
/* very large branches
if(o->type == 6 && p->cond) {
@ -298,74 +207,6 @@ span(void)
}
}
if(seenthumb){ // branch resolution
int passes = 0;
int lastc = 0;
int again;
Prog *oop;
loop:
passes++;
if(passes > 100){
diag("span looping !");
errorexit();
}
c = INITTEXT;
oop = op = nil;
again = 0;
for(cursym = textp; cursym != nil; cursym = cursym->next) {
cursym->value = c;
for(p = cursym->text; p != P; oop = op, op = p, p = p->link) {
curp = p;
setarch(p);
if(p->pc != c)
again = 1;
p->pc = c;
if(thumb && isbranch(p))
nocache(p);
o = oplook(p);
m = o->size;
if(passes == 1 && thumb && isbranch(p)){ // start conservative so unneeded alignment is not added
if(p->as == ABL)
m = 4;
else
m = 2;
p->align = 0;
}
if(p->align){
if((p->align == 4 && (c&3)) || (p->align == 2 && !(c&3))){
if(ispad(op)){
oop->link = p;
op = oop;
c -= 2;
p->pc = c;
}
else{
op->link = pad(op, c);
op = op->link;
c += 2;
p->pc = c;
}
again = 1;
}
}
if(m == 0) {
if(p->as == ATEXT) {
autosize = p->to.offset + 4;
if(p->from.sym != S)
p->from.sym->value = c;
continue;
}
}
c += m;
}
cursym->size = c - cursym->value;
}
if(c != lastc || again){
lastc = c;
goto loop;
}
}
c = rnd(c, 8);
/*
@ -378,7 +219,6 @@ span(void)
*/
for(cursym = textp; cursym != nil; cursym = cursym->next) {
p = cursym->text;
setarch(p);
autosize = p->to.offset + 4;
symgrow(cursym, cursym->size);
@ -412,13 +252,6 @@ span(void)
int
checkpool(Prog *p, int sz)
{
if(thumb){
if(pool.size >= 0x3fc || (p->pc+sz+pool.extra+2+2)+(pool.size-4)-pool.start-4 >= 0x3fc)
return flushpool(p, 1, 0);
else if(p->link == P)
return flushpool(p, 2, 0);
return 0;
}
if(pool.size >= 0xffc || immaddr((p->pc+sz+4)+4+pool.size - pool.start+8) == 0)
return flushpool(p, 1, 0);
else if(p->link == P)
@ -441,7 +274,7 @@ flushpool(Prog *p, int skip, int force)
q->link = blitrl;
blitrl = q;
}
else if(!force && (p->pc+pool.size-pool.start < (thumb ? 0x3fc+4-pool.extra : 2048)))
else if(!force && (p->pc+pool.size-pool.start < 2048))
return 0;
elitrl->link = p->link;
p->link = blitrl;
@ -461,9 +294,6 @@ addpool(Prog *p, Adr *a)
Prog *q, t;
int c;
if(thumb)
c = thumbaclass(a, p);
else
c = aclass(a);
t = zprg;
@ -480,12 +310,10 @@ addpool(Prog *p, Adr *a)
case C_FOREG:
case C_SOREG:
case C_HOREG:
case C_GOREG:
case C_FAUTO:
case C_SAUTO:
case C_LAUTO:
case C_LACON:
case C_GACON:
t.to.type = D_CONST;
t.to.offset = instoffset;
break;
@ -591,16 +419,6 @@ symaddr(Sym *s)
return 0;
case STEXT:
/* TODO(rsc): what is this for?
#ifdef CALLEEBX
v += fnpinc(s);
#else
if(s->thumb)
v++; // T bit
#endif
*/
break;
case SELFDATA:
case SRODATA:
case SDATA:
@ -768,34 +586,18 @@ oplook(Prog *p)
int a1, a2, a3, r;
char *c1, *c3;
Optab *o, *e;
Optab *otab;
Oprang *orange;
if(thumb){
otab = thumboptab;
orange = thumboprange;
}
else{
otab = optab;
orange = oprange;
}
a1 = p->optab;
if(a1)
return otab+(a1-1);
return optab+(a1-1);
a1 = p->from.class;
if(a1 == 0) {
if(thumb)
a1 = thumbaclass(&p->from, p) + 1;
else
a1 = aclass(&p->from) + 1;
p->from.class = a1;
}
a1--;
a3 = p->to.class;
if(a3 == 0) {
if(thumb)
a3 = thumbaclass(&p->to, p) + 1;
else
a3 = aclass(&p->to) + 1;
p->to.class = a3;
}
@ -804,35 +606,35 @@ oplook(Prog *p)
if(p->reg != NREG)
a2 = C_REG;
r = p->as;
o = orange[r].start;
o = oprange[r].start;
if(o == 0) {
a1 = opcross[repop[r]][a1][a2][a3];
if(a1) {
p->optab = a1+1;
return otab+a1;
return optab+a1;
}
o = orange[r].stop; /* just generate an error */
o = oprange[r].stop; /* just generate an error */
}
if(debug['O']) {
print("oplook %A %O %O %O\n",
(int)p->as, a1, a2, a3);
print(" %d %d\n", p->from.type, p->to.type);
}
e = orange[r].stop;
e = oprange[r].stop;
c1 = xcmp[a1];
c3 = xcmp[a3];
for(; o<e; o++)
if(o->a2 == a2)
if(c1[o->a1])
if(c3[o->a3]) {
p->optab = (o-otab)+1;
p->optab = (o-optab)+1;
return o;
}
diag("illegal combination %A %O %O %O, %d %d",
p->as, a1, a2, a3, p->from.type, p->to.type);
prasm(p);
if(o == 0)
o = otab;
o = optab;
return o;
}
@ -883,9 +685,6 @@ cmp(int a, int b)
if(b == C_SBRA)
return 1;
break;
case C_GBRA:
if(b == C_SBRA || b == C_LBRA)
return 1;
case C_HREG:
return cmp(C_SP, b) || cmp(C_PC, b);
@ -903,9 +702,6 @@ ocmp(const void *a1, const void *a2)
p1 = (Optab*)a1;
p2 = (Optab*)a2;
n = p1->as - p2->as;
if(n)
return n;
n = (p2->flag&V4) - (p1->flag&V4); /* architecture version */
if(n)
return n;
n = p1->a1 - p2->a1;
@ -925,15 +721,11 @@ buildop(void)
{
int i, n, r;
armv4 = 1;
for(i=0; i<C_GOK; i++)
for(n=0; n<C_GOK; n++)
xcmp[i][n] = cmp(n, i);
for(n=0; optab[n].as != AXXX; n++)
if((optab[n].flag & V4) && !armv4) {
optab[n].as = AXXX;
break;
}
;
qsort(optab, n, sizeof(optab[0]), ocmp);
for(i=0; i<n; i++) {
r = optab[i].as;

1658
src/cmd/5l/thumb.c
View File

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