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5l: stop using R12 as SB

Browse Source 
Because the SB is only good for 8k and Go programs
tend to have much more data than that, SB doesn't
save very much.  A fmt.Printf-based hello world program
has  360 kB text segment.  Removing SB makes the text
500 bytes (0.14%) longer.

R=ken2, r2, ken3
CC=golang-dev
https://golang.org/cl/2487042
This commit is contained in:
Russ Cox 2010-10-17 11:41:23 -04:00
parent 77eb94c032
commit 8052786e51
7 changed files with 26 additions and 125 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/cmd/5l/l.h
View File

@ -238,9 +238,6 @@ enum
C_LACON,
C_GACON, /* thumb */
C_RECON,
C_LECON,
C_SBRA,
C_LBRA,
C_GBRA, /* thumb */
@ -251,12 +248,6 @@ enum
C_SAUTO, /* -0xfff to 0xfff */
C_LAUTO,
C_HEXT,
C_FEXT,
C_HFEXT,
C_SEXT,
C_LEXT,
C_HOREG,
C_FOREG,
C_HFOREG,
@ -280,7 +271,6 @@ enum
LABEL = 1<<1,
LEAF = 1<<2,
BIG = (1<<12)-4,
STRINGSZ = 200,
NHASH = 10007,
NHUNK = 100000,

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

@ -382,7 +382,6 @@ cnames[] =
[C_FAUTO] = "C_FAUTO",
[C_FCON] = "C_FCON",
[C_FCR] = "C_FCR",
[C_FEXT] = "C_FEXT",
[C_FOREG] = "C_FOREG",
[C_FREG] = "C_FREG",
[C_GACON] = "C_GACON",
@ -391,9 +390,7 @@ cnames[] =
[C_GOK] = "C_GOK",
[C_GOREG] = "C_GOREG",
[C_HAUTO] = "C_HAUTO",
[C_HEXT] = "C_HEXT",
[C_HFAUTO] = "C_HFAUTO",
[C_HFEXT] = "C_HFEXT",
[C_HFOREG] = "C_HFOREG",
[C_HOREG] = "C_HOREG",
[C_HREG] = "C_HREG",
@ -401,8 +398,6 @@ cnames[] =
[C_LAUTO] = "C_LAUTO",
[C_LBRA] = "C_LBRA",
[C_LCON] = "C_LCON",
[C_LECON] = "C_LECON",
[C_LEXT] = "C_LEXT",
[C_LOREG] = "C_LOREG",
[C_NCON] = "C_NCON",
[C_NONE] = "C_NONE",
@ -411,7 +406,6 @@ cnames[] =
[C_PSR] = "C_PSR",
[C_RACON] = "C_RACON",
[C_RCON] = "C_RCON",
[C_RECON] = "C_RECON",
[C_REG] = "C_REG",
[C_REGREG] = "C_REGREG",
[C_ROREG] = "C_ROREG",
@ -419,7 +413,6 @@ cnames[] =
[C_SAUTO] = "C_SAUTO",
[C_SBRA] = "C_SBRA",
[C_SCON] = "C_SCON",
[C_SEXT] = "C_SEXT",
[C_SHIFT] = "C_SHIFT",
[C_SOREG] = "C_SOREG",
[C_SP] = "C_SP",

3
src/cmd/5l/obj.c
View File

@ -70,6 +70,7 @@ main(int argc, char *argv[])
{
int c, i;
debug['s'] = 1;
Binit(&bso, 1, OWRITE);
cout = -1;
listinit();
@ -258,9 +259,7 @@ main(int argc, char *argv[])
follow();
softfloat();
noops();
xdefine("setR12", SFIXED, 0);
span();
xdefine("setR12", SFIXED, INITDAT+BIG);
reloc();
asmb();
undef();

39
src/cmd/5l/optab.c
View File

@ -34,8 +34,6 @@ Optab optab[] =
{
/* struct Optab:
OPCODE, from, prog->reg, to, type,size,param,flag */
{ ATEXT, C_LEXT, C_NONE, C_LCON, 0, 0, 0 },
{ ATEXT, C_LEXT, C_REG, C_LCON, 0, 0, 0 },
{ ATEXT, C_ADDR, C_NONE, C_LCON, 0, 0, 0 },
{ ATEXT, C_ADDR, C_REG, C_LCON, 0, 0, 0 },
@ -56,7 +54,6 @@ Optab optab[] =
{ AMVN, C_SHIFT,C_NONE, C_REG, 3, 4, 0 },
{ ACMP, C_SHIFT,C_REG, C_NONE, 3, 4, 0 },
{ AMOVW, C_RECON,C_NONE, C_REG, 4, 4, REGSB },
{ AMOVW, C_RACON,C_NONE, C_REG, 4, 4, REGSP },
{ AB, C_NONE, C_NONE, C_SBRA, 5, 4, 0, LPOOL },
@ -81,7 +78,6 @@ Optab optab[] =
{ 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_LEXT, 11, 4, 0 },
{ AWORD, C_NONE, C_NONE, C_ADDR, 11, 4, 0 },
{ AMOVW, C_NCON, C_NONE, C_REG, 12, 4, 0 },
@ -109,85 +105,64 @@ Optab optab[] =
{ AMULL, C_REG, C_REG, C_REGREG, 17, 4, 0 },
{ AMOVW, C_REG, C_NONE, C_SEXT, 20, 4, REGSB },
{ AMOVW, C_REG, C_NONE, C_SAUTO, 20, 4, REGSP },
{ AMOVW, C_REG, C_NONE, C_SOREG, 20, 4, 0 },
{ AMOVB, C_REG, C_NONE, C_SEXT, 20, 4, REGSB },
{ AMOVB, C_REG, C_NONE, C_SAUTO, 20, 4, REGSP },
{ AMOVB, C_REG, C_NONE, C_SOREG, 20, 4, 0 },
{ AMOVBU, C_REG, C_NONE, C_SEXT, 20, 4, REGSB },
{ AMOVBU, C_REG, C_NONE, C_SAUTO, 20, 4, REGSP },
{ AMOVBU, C_REG, C_NONE, C_SOREG, 20, 4, 0 },
{ AMOVW, C_SEXT, C_NONE, C_REG, 21, 4, REGSB },
{ AMOVW, C_SAUTO,C_NONE, C_REG, 21, 4, REGSP },
{ AMOVW, C_SOREG,C_NONE, C_REG, 21, 4, 0 },
{ AMOVBU, C_SEXT, C_NONE, C_REG, 21, 4, REGSB },
{ AMOVBU, C_SAUTO,C_NONE, C_REG, 21, 4, REGSP },
{ AMOVBU, C_SOREG,C_NONE, C_REG, 21, 4, 0 },
{ AMOVB, C_SEXT, C_NONE, C_REG, 22, 12, REGSB },
{ AMOVB, C_SAUTO,C_NONE, C_REG, 22, 12, REGSP },
{ AMOVB, C_SOREG,C_NONE, C_REG, 22, 12, 0 },
{ AMOVH, C_SEXT, C_NONE, C_REG, 22, 12, REGSB },
{ AMOVH, C_SAUTO,C_NONE, C_REG, 22, 12, REGSP },
{ AMOVH, C_SOREG,C_NONE, C_REG, 22, 12, 0 },
{ AMOVHU, C_SEXT, C_NONE, C_REG, 22, 12, REGSB },
{ AMOVHU, C_SAUTO,C_NONE, C_REG, 22, 12, REGSP },
{ AMOVHU, C_SOREG,C_NONE, C_REG, 22, 12, 0 },
{ AMOVH, C_REG, C_NONE, C_SEXT, 23, 12, REGSB },
{ AMOVH, C_REG, C_NONE, C_SAUTO, 23, 12, REGSP },
{ AMOVH, C_REG, C_NONE, C_SOREG, 23, 12, 0 },
{ AMOVHU, C_REG, C_NONE, C_SEXT, 23, 12, REGSB },
{ AMOVHU, C_REG, C_NONE, C_SAUTO, 23, 12, REGSP },
{ AMOVHU, C_REG, C_NONE, C_SOREG, 23, 12, 0 },
{ AMOVW, C_REG, C_NONE, C_LEXT, 30, 8, REGSB, LTO },
{ AMOVW, C_REG, C_NONE, C_LAUTO, 30, 8, REGSP, LTO },
{ AMOVW, C_REG, C_NONE, C_LOREG, 30, 8, 0, LTO },
{ AMOVW, C_REG, C_NONE, C_ADDR, 64, 8, 0, LTO },
{ AMOVB, C_REG, C_NONE, C_LEXT, 30, 8, REGSB, LTO },
{ AMOVB, C_REG, C_NONE, C_LAUTO, 30, 8, REGSP, LTO },
{ AMOVB, C_REG, C_NONE, C_LOREG, 30, 8, 0, LTO },
{ AMOVB, C_REG, C_NONE, C_ADDR, 64, 8, 0, LTO },
{ AMOVBU, C_REG, C_NONE, C_LEXT, 30, 8, REGSB, LTO },
{ AMOVBU, C_REG, C_NONE, C_LAUTO, 30, 8, REGSP, LTO },
{ AMOVBU, C_REG, C_NONE, C_LOREG, 30, 8, 0, LTO },
{ AMOVBU, C_REG, C_NONE, C_ADDR, 64, 8, 0, LTO },
{ AMOVW, C_LEXT, C_NONE, C_REG, 31, 8, REGSB, LFROM },
{ AMOVW, C_LAUTO,C_NONE, C_REG, 31, 8, REGSP, LFROM },
{ AMOVW, C_LOREG,C_NONE, C_REG, 31, 8, 0, LFROM },
{ AMOVW, C_ADDR, C_NONE, C_REG, 65, 8, 0, LFROM },
{ AMOVBU, C_LEXT, C_NONE, C_REG, 31, 8, REGSB, LFROM },
{ AMOVBU, C_LAUTO,C_NONE, C_REG, 31, 8, REGSP, LFROM },
{ AMOVBU, C_LOREG,C_NONE, C_REG, 31, 8, 0, LFROM },
{ AMOVBU, C_ADDR, C_NONE, C_REG, 65, 8, 0, LFROM },
{ AMOVB, C_LEXT, C_NONE, C_REG, 32, 16, REGSB, LFROM },
{ AMOVB, C_LAUTO,C_NONE, C_REG, 32, 16, REGSP, LFROM },
{ AMOVB, C_LOREG,C_NONE, C_REG, 32, 16, 0, LFROM },
{ AMOVB, C_ADDR, C_NONE, C_REG, 66, 16, 0, LFROM },
{ AMOVH, C_LEXT, C_NONE, C_REG, 32, 16, REGSB, LFROM },
{ AMOVH, C_LAUTO,C_NONE, C_REG, 32, 16, REGSP, LFROM },
{ AMOVH, C_LOREG,C_NONE, C_REG, 32, 16, 0, LFROM },
{ AMOVH, C_ADDR, C_NONE, C_REG, 66, 16, 0, LFROM },
{ AMOVHU, C_LEXT, C_NONE, C_REG, 32, 16, REGSB, LFROM },
{ AMOVHU, C_LAUTO,C_NONE, C_REG, 32, 16, REGSP, LFROM },
{ AMOVHU, C_LOREG,C_NONE, C_REG, 32, 16, 0, LFROM },
{ AMOVHU, C_ADDR, C_NONE, C_REG, 66, 16, 0, LFROM },
{ AMOVH, C_REG, C_NONE, C_LEXT, 33, 24, REGSB, LTO },
{ AMOVH, C_REG, C_NONE, C_LAUTO, 33, 24, REGSP, LTO },
{ AMOVH, C_REG, C_NONE, C_LOREG, 33, 24, 0, LTO },
{ AMOVH, C_REG, C_NONE, C_ADDR, 67, 24, 0, LTO },
{ AMOVHU, C_REG, C_NONE, C_LEXT, 33, 24, REGSB, LTO },
{ AMOVHU, C_REG, C_NONE, C_LAUTO, 33, 24, REGSP, LTO },
{ AMOVHU, C_REG, C_NONE, C_LOREG, 33, 24, 0, LTO },
{ AMOVHU, C_REG, C_NONE, C_ADDR, 67, 24, 0, LTO },
{ AMOVW, C_LECON,C_NONE, C_REG, 34, 8, REGSB, LFROM },
{ AMOVW, C_LACON,C_NONE, C_REG, 34, 8, REGSP, LFROM },
{ AMOVW, C_PSR, C_NONE, C_REG, 35, 4, 0 },
@ -201,19 +176,15 @@ Optab optab[] =
{ ARFE, C_NONE, C_NONE, C_NONE, 41, 4, 0 },
{ AMOVF, C_FREG, C_NONE, C_FEXT, 50, 4, REGSB },
{ AMOVF, C_FREG, C_NONE, C_FAUTO, 50, 4, REGSP },
{ AMOVF, C_FREG, C_NONE, C_FOREG, 50, 4, 0 },
{ AMOVF, C_FEXT, C_NONE, C_FREG, 51, 4, REGSB },
{ AMOVF, C_FAUTO,C_NONE, C_FREG, 51, 4, REGSP },
{ AMOVF, C_FOREG,C_NONE, C_FREG, 51, 4, 0 },
{ AMOVF, C_FREG, C_NONE, C_LEXT, 52, 12, REGSB, LTO },
{ AMOVF, C_FREG, C_NONE, C_LAUTO, 52, 12, REGSP, LTO },
{ AMOVF, C_FREG, C_NONE, C_LOREG, 52, 12, 0, LTO },
{ AMOVF, C_LEXT, C_NONE, C_FREG, 53, 12, REGSB, LFROM },
{ AMOVF, C_LAUTO,C_NONE, C_FREG, 53, 12, REGSP, LFROM },
{ AMOVF, C_LOREG,C_NONE, C_FREG, 53, 12, 0, LFROM },
@ -248,37 +219,27 @@ 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_HEXT, 70, 4, REGSB, V4 },
{ 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_HEXT, 70, 4, REGSB, V4 },
{ AMOVHU, C_REG, C_NONE, C_HAUTO, 70, 4, REGSP, V4 },
{ AMOVHU, C_REG, C_NONE, C_HOREG, 70, 4, 0, V4 },
{ AMOVB, C_HEXT, C_NONE, C_REG, 71, 4, REGSB, V4 },
{ AMOVB, C_HAUTO,C_NONE, C_REG, 71, 4, REGSP, V4 },
{ AMOVB, C_HOREG,C_NONE, C_REG, 71, 4, 0, V4 },
{ AMOVH, C_HEXT, C_NONE, C_REG, 71, 4, REGSB, 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_HEXT, C_NONE, C_REG, 71, 4, REGSB, V4 },
{ AMOVHU, C_HAUTO,C_NONE, C_REG, 71, 4, REGSP, V4 },
{ AMOVHU, C_HOREG,C_NONE, C_REG, 71, 4, 0, V4 },
{ AMOVH, C_REG, C_NONE, C_LEXT, 72, 8, REGSB, LTO|V4 },
{ AMOVH, C_REG, C_NONE, C_LAUTO, 72, 8, REGSP, LTO|V4 },
{ AMOVH, C_REG, C_NONE, C_LOREG, 72, 8, 0, LTO|V4 },
{ AMOVHU, C_REG, C_NONE, C_LEXT, 72, 8, REGSB, 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 },
{ AMOVB, C_LEXT, C_NONE, C_REG, 73, 8, REGSB, LFROM|V4 },
{ AMOVB, C_LAUTO,C_NONE, C_REG, 73, 8, REGSP, LFROM|V4 },
{ AMOVB, C_LOREG,C_NONE, C_REG, 73, 8, 0, LFROM|V4 },
{ AMOVH, C_LEXT, C_NONE, C_REG, 73, 8, REGSB, 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 },
{ AMOVHU, C_LEXT, C_NONE, C_REG, 73, 8, REGSB, 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 },
{ ALDREX, C_SOREG,C_NONE, C_REG, 77, 4, 0 },

49
src/cmd/5l/span.c
View File

@ -54,9 +54,9 @@ ispad(Prog *p)
{
if(p->as != AMOVW)
return 0;
if(p->from.type != D_REG || p->from.reg != REGSB)
if(p->from.type != D_REG || p->from.reg != REGTMP)
return 0;
if(p->to.type != D_REG || p->to.reg != REGSB)
if(p->to.type != D_REG || p->to.reg != REGTMP)
return 0;
return 1;
}
@ -121,9 +121,9 @@ pad(Prog *p, int pc)
q->as = AMOVW;
q->line = p->line;
q->from.type = D_REG;
q->from.reg = REGSB;
q->from.reg = REGTMP;
q->to.type = D_REG;
q->to.reg = REGSB;
q->to.reg = REGTMP;
q->pc = pc;
q->link = p->link;
return q;
@ -542,6 +542,7 @@ xdefine(char *p, int t, int32 v)
s = lookup(p, 0);
s->type = t;
s->value = v;
s->reachable = 1;
}
int32
@ -670,16 +671,8 @@ aclass(Adr *a)
s->name, TNAME);
s->type = SDATA;
}
instoffset = s->value + a->offset - INITDAT - BIG;
t = immaddr(instoffset);
if(t) {
if(immhalf(instoffset))
return immfloat(t) ? C_HFEXT : C_HEXT;
if(immfloat(t))
return C_FEXT;
return C_SEXT;
}
return C_LEXT;
instoffset = s->value + a->offset;
return C_ADDR;
case D_AUTO:
instoffset = autosize + a->offset;
t = immaddr(instoffset);
@ -770,23 +763,11 @@ aclass(Adr *a)
if(s == S)
break;
t = s->type;
switch(t) {
case 0:
case SXREF:
if(t == 0 || t == SXREF) {
diag("undefined external: %s in %s",
s->name, TNAME);
s->type = SDATA;
break;
case SFIXED:
case STEXT:
case SCONST:
instoffset = symaddr(s) + a->offset;
return C_LCON;
}
instoffset = s->value + a->offset - INITDAT - BIG;
t = immrot(instoffset);
if(t && instoffset != 0)
return C_RECON;
instoffset = symaddr(s) + a->offset;
return C_LCON;
@ -899,20 +880,6 @@ cmp(int a, int b)
if(b == C_RACON)
return 1;
break;
case C_LECON:
if(b == C_RECON)
return 1;
break;
case C_HFEXT:
return b == C_HEXT || b == C_FEXT;
case C_FEXT:
case C_HEXT:
return b == C_HFEXT;
case C_SEXT:
return cmp(C_HFEXT, b);
case C_LEXT:
return cmp(C_SEXT, b);
case C_HFAUTO:
return b == C_HAUTO || b == C_FAUTO;

41
src/cmd/5l/thumb.c
View File

@ -204,8 +204,7 @@ thumbaclass(Adr *a, Prog *p)
a->sym->type = SDATA;
}
instoffset = a->sym->value + a->offset;
return C_LEXT; /* INITDAT unknown at this stage */
// return immacon(instoffset, p, C_SEXT, C_LEXT);
return C_ADDR; /* INITDAT unknown at this stage */
case D_AUTO:
instoffset = autosize + a->offset;
return immauto(instoffset, p);
@ -357,8 +356,8 @@ thumbaclass(Adr *a, Prog *p)
// as a1 a2 a3 type size param lit vers
Optab thumboptab[] =
{
{ ATEXT, C_LEXT, C_NONE, C_LCON, 0, 0, 0 },
{ ATEXT, C_LEXT, C_REG, C_LCON, 0, 0, 0 },
{ ATEXT, C_ADDR, C_NONE, C_LCON, 0, 0, 0 },
{ ATEXT, C_ADDR, C_REG, C_LCON, 0, 0, 0 },
{ AMVN, C_REG, C_NONE, C_REG, 1, 2, 0 },
{ ASRL, C_REG, C_NONE, C_REG, 1, 2, 0 },
{ ACMP, C_REG, C_REG, C_NONE, 1, 2, 0 },
@ -411,37 +410,27 @@ Optab thumboptab[] =
{ ASWI, C_NONE, C_NONE, C_LCON, 16, 2, 0 },
{ AWORD, C_NONE, C_NONE, C_LCON, 17, 4, 0 },
{ AWORD, C_NONE, C_NONE, C_GCON, 17, 4, 0 },
{ AWORD, C_NONE, C_NONE, C_LEXT, 17, 4, 0 },
{ AWORD, C_NONE, C_NONE, C_ADDR, 17, 4, 0 },
{ ADWORD, C_LCON, C_NONE, C_LCON, 50, 8, 0 },
{ AMOVW, C_SAUTO, C_NONE, C_REG, 18, 2, REGSP },
{ AMOVW, C_LAUTO, C_NONE, C_REG, 33, 6, 0, LFROM },
// { AMOVW, C_OFFPC, C_NONE, C_REG, 18, 2, REGPC, LFROM },
{ AMOVW, C_SEXT, C_NONE, C_REG, 30, 4, 0 },
{ AMOVW, C_SOREG, C_NONE, C_REG, 19, 2, 0 },
{ AMOVHU, C_SEXT, C_NONE, C_REG, 30, 4, 0 },
{ AMOVHU, C_SOREG, C_NONE, C_REG, 19, 2, 0 },
{ AMOVBU, C_SEXT, C_NONE, C_REG, 30, 4, 0 },
{ AMOVBU, C_SOREG, C_NONE, C_REG, 19, 2, 0 },
{ AMOVW, C_REG, C_NONE, C_SAUTO, 20, 2, 0 },
{ AMOVW, C_REG, C_NONE, C_LAUTO, 34, 6, 0, LTO },
{ AMOVW, C_REG, C_NONE, C_SEXT, 31, 4, 0 },
{ AMOVW, C_REG, C_NONE, C_SOREG, 21, 2, 0 },
{ AMOVH, C_REG, C_NONE, C_SEXT, 31, 4, 0 },
{ AMOVH, C_REG, C_NONE, C_SOREG, 21, 2, 0 },
{ AMOVB, C_REG, C_NONE, C_SEXT, 31, 4, 0 },
{ AMOVB, C_REG, C_NONE, C_SOREG, 21, 2, 0 },
{ AMOVHU, C_REG, C_NONE, C_SEXT, 31, 4, 0 },
{ AMOVHU, C_REG, C_NONE, C_SOREG, 21, 2, 0 },
{ AMOVBU, C_REG, C_NONE, C_SEXT, 31, 4, 0 },
{ AMOVBU, C_REG, C_NONE, C_SOREG, 21, 2, 0 },
{ AMOVW, C_REG, C_NONE, C_REG, 22, 2, 0 },
{ AMOVB, C_REG, C_NONE, C_REG, 23, 4, 0 },
{ AMOVH, C_REG, C_NONE, C_REG, 23, 4, 0 },
{ AMOVBU, C_REG, C_NONE, C_REG, 23, 4, 0 },
{ AMOVHU, C_REG, C_NONE, C_REG, 23, 4, 0 },
{ AMOVH, C_SEXT, C_NONE, C_REG, 32, 6, 0 },
{ AMOVH, C_SOREG, C_NONE, C_REG, 24, 4, 0 },
{ AMOVB, C_SEXT, C_NONE, C_REG, 32, 6, 0 },
{ AMOVB, C_SOREG, C_NONE, C_REG, 24, 4, 0 },
{ AMOVW, C_SACON, C_NONE, C_REG, 25, 2, 0 },
{ AMOVW, C_LACON, C_NONE, C_REG, 35, 4, 0 },
@ -468,16 +457,16 @@ Optab thumboptab[] =
{ AMOVB, C_REG, C_NONE, C_GOREG, 29, 4, 0, LTO },
{ AMOVHU, C_REG, C_NONE, C_GOREG, 29, 4, 0, LTO },
{ AMOVBU, C_REG, C_NONE, C_GOREG, 29, 4, 0, LTO },
{ AMOVW, C_LEXT, C_NONE, C_REG, 30, 4, 0, LFROM },
{ AMOVH, C_LEXT, C_NONE, C_REG, 32, 6, 0, LFROM },
{ AMOVB, C_LEXT, C_NONE, C_REG, 32, 6, 0, LFROM },
{ AMOVHU, C_LEXT, C_NONE, C_REG, 30, 4, 0, LFROM },
{ AMOVBU, C_LEXT, C_NONE, C_REG, 30, 4, 0, LFROM },
{ AMOVW, C_REG, C_NONE, C_LEXT, 31, 4, 0, LTO },
{ AMOVH, C_REG, C_NONE, C_LEXT, 31, 4, 0, LTO },
{ AMOVB, C_REG, C_NONE, C_LEXT, 31, 4, 0, LTO },
{ AMOVHU, C_REG, C_NONE, C_LEXT, 31, 4, 0, LTO },
{ AMOVBU, C_REG, C_NONE, C_LEXT, 31, 4, 0, LTO },
{ AMOVW, C_ADDR, C_NONE, C_REG, 30, 4, 0, LFROM },
{ AMOVH, C_ADDR, C_NONE, C_REG, 32, 6, 0, LFROM },
{ AMOVB, C_ADDR, C_NONE, C_REG, 32, 6, 0, LFROM },
{ AMOVHU, C_ADDR, C_NONE, C_REG, 30, 4, 0, LFROM },
{ AMOVBU, C_ADDR, C_NONE, C_REG, 30, 4, 0, LFROM },
{ AMOVW, C_REG, C_NONE, C_ADDR, 31, 4, 0, LTO },
{ AMOVH, C_REG, C_NONE, C_ADDR, 31, 4, 0, LTO },
{ AMOVB, C_REG, C_NONE, C_ADDR, 31, 4, 0, LTO },
{ AMOVHU, C_REG, C_NONE, C_ADDR, 31, 4, 0, LTO },
{ AMOVBU, C_REG, C_NONE, C_ADDR, 31, 4, 0, LTO },
{ AXXX, C_NONE, C_NONE, C_NONE, 0, 2, 0 },
};
@ -980,6 +969,7 @@ if(debug['G']) print("%ux: %s: thumb\n", (uint32)(p->pc), p->from.sym->name);
}
break;
case 30: /* AMOVW... *addr, R */
diag("likely broken"); // does this still refer to SB?
thumbaclass(&p->from, p);
o1 = mv(p, rt, instoffset); // MOV addr, rtmp
o2 = thumbopmv(p->as, 1);
@ -987,6 +977,7 @@ if(debug['G']) print("%ux: %s: thumb\n", (uint32)(p->pc), p->from.sym->name);
o2 |= (rt<<3) | rt; // MOV* 0(rtmp), R
break;
case 31: /* AMOVW... R, *addr */
diag("likely broken"); // does this still refer to SB?
thumbaclass(&p->to, p);
o1 = mv(p, REGTMPT, instoffset);
o2 = thumbopmv(p->as, 0);

2
src/pkg/runtime/arm/asm.s
View File

@ -6,7 +6,7 @@
// using frame size $-4 means do not save LR on stack.
TEXT _rt0_arm(SB),7,$-4
MOVW $setR12(SB), R12
MOVW $0xcafebabe, R12
// copy arguments forward on an even stack
// use R13 instead of SP to avoid linker rewriting the offsets