mirror/binutils-gdb
2
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2024-12-03 04:12:10 +08:00
Code Issues Packages Projects Releases Wiki Activity
550c188837
binutils-gdb/gas/config/tc-spu.c
Alan Modra 7bc3e93c1b * config/tc-spu.c (struct spu_insn): Delete "flag". Add "reloc". 
(md_assemble): Update init of insn.  Use insn.reloc instead of
	calculating from flag.
	(get_imm): Set reloc rather than flag.
	(calcop): Formatting.
2007-09-04 04:10:21 +00:00

1080 lines
27 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* spu.c -- Assembler for the IBM Synergistic Processing Unit (SPU)
Copyright 2006, 2007 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#include "as.h"
#include "safe-ctype.h"
#include "subsegs.h"
#include "dwarf2dbg.h"
const struct spu_opcode spu_opcodes[] = {
#define APUOP(TAG,MACFORMAT,OPCODE,MNEMONIC,ASMFORMAT,DEP,PIPE) \
{ MACFORMAT, (OPCODE) << (32-11), MNEMONIC, ASMFORMAT },
#define APUOPFB(TAG,MACFORMAT,OPCODE,FB,MNEMONIC,ASMFORMAT,DEP,PIPE) \
{ MACFORMAT, ((OPCODE) << (32-11)) | ((FB) << (32-18)), MNEMONIC, ASMFORMAT },
#include "opcode/spu-insns.h"
#undef APUOP
#undef APUOPFB
};
static const int spu_num_opcodes =
sizeof (spu_opcodes) / sizeof (spu_opcodes[0]);
#define MAX_RELOCS 2
struct spu_insn
{
unsigned int opcode;
expressionS exp[MAX_RELOCS];
int reloc_arg[MAX_RELOCS];
bfd_reloc_code_real_type reloc[MAX_RELOCS];
enum spu_insns tag;
};
static const char *get_imm (const char *param, struct spu_insn *insn, int arg);
static const char *get_reg (const char *param, struct spu_insn *insn, int arg,
int accept_expr);
static int calcop (struct spu_opcode *format, const char *param,
struct spu_insn *insn);
static void spu_cons (int);
extern char *myname;
static struct hash_control *op_hash = NULL;
/* These bits should be turned off in the first address of every segment */
int md_seg_align = 7;
/* These chars start a comment anywhere in a source file (except inside
another comment */
const char comment_chars[] = "#";
/* These chars only start a comment at the beginning of a line. */
const char line_comment_chars[] = "#";
/* gods own line continuation char */
const char line_separator_chars[] = ";";
/* Chars that can be used to separate mant from exp in floating point nums */
const char EXP_CHARS[] = "eE";
/* Chars that mean this number is a floating point constant */
/* as in 0f123.456 */
/* or 0H1.234E-12 (see exp chars above) */
const char FLT_CHARS[] = "dDfF";
const pseudo_typeS md_pseudo_table[] =
{
{"align", s_align_ptwo, 4},
{"bss", s_lcomm_bytes, 1},
{"def", s_set, 0},
{"dfloat", float_cons, 'd'},
{"ffloat", float_cons, 'f'},
{"global", s_globl, 0},
{"half", cons, 2},
{"int", spu_cons, 4},
{"long", spu_cons, 4},
{"quad", spu_cons, 8},
{"string", stringer, 1},
{"word", spu_cons, 4},
/* Force set to be treated as an instruction. */
{"set", NULL, 0},
{".set", s_set, 0},
/* Likewise for eqv. */
{"eqv", NULL, 0},
{".eqv", s_set, -1},
{"file", (void (*) PARAMS ((int))) dwarf2_directive_file, 0 },
{"loc", dwarf2_directive_loc, 0},
{0,0,0}
};
void
md_begin (void)
{
const char *retval = NULL;
int i;
/* initialize hash table */
op_hash = hash_new ();
/* loop until you see the end of the list */
for (i = 0; i < spu_num_opcodes; i++)
{
/* hash each mnemonic and record its position */
retval = hash_insert (op_hash, spu_opcodes[i].mnemonic, (PTR)&spu_opcodes[i]);
if (retval != NULL && strcmp (retval, "exists") != 0)
as_fatal (_("Can't hash instruction '%s':%s"),
spu_opcodes[i].mnemonic, retval);
}
}
const char *md_shortopts = "";
struct option md_longopts[] = {
#define OPTION_APUASM (OPTION_MD_BASE)
{"apuasm", no_argument, NULL, OPTION_APUASM},
#define OPTION_DD2 (OPTION_MD_BASE+1)
{"mdd2.0", no_argument, NULL, OPTION_DD2},
#define OPTION_DD1 (OPTION_MD_BASE+2)
{"mdd1.0", no_argument, NULL, OPTION_DD1},
#define OPTION_DD3 (OPTION_MD_BASE+3)
{"mdd3.0", no_argument, NULL, OPTION_DD3},
{ NULL, no_argument, NULL, 0 }
};
size_t md_longopts_size = sizeof (md_longopts);
/* When set (by -apuasm) our assembler emulates the behaviour of apuasm.
* e.g. don't add bias to float conversion and don't right shift
* immediate values. */
static int emulate_apuasm;
/* Use the dd2.0 instructions set. The only differences are some new
* register names and the orx insn */
static int use_dd2 = 1;
int
md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
{
switch (c)
{
case OPTION_APUASM:
emulate_apuasm = 1;
break;
case OPTION_DD3:
use_dd2 = 1;
break;
case OPTION_DD2:
use_dd2 = 1;
break;
case OPTION_DD1:
use_dd2 = 0;
break;
default:
return 0;
}
return 1;
}
void
md_show_usage (FILE *stream)
{
fputs (_("\
SPU options:\n\
--apuasm emulate behaviour of apuasm\n"),
stream);
}
struct arg_encode {
int size;
int pos;
int rshift;
int lo, hi;
int wlo, whi;
bfd_reloc_code_real_type reloc;
};
static struct arg_encode arg_encode[A_MAX] = {
{ 7, 0, 0, 0, 127, 0, -1, 0 }, /* A_T */
{ 7, 7, 0, 0, 127, 0, -1, 0 }, /* A_A */
{ 7, 14, 0, 0, 127, 0, -1, 0 }, /* A_B */
{ 7, 21, 0, 0, 127, 0, -1, 0 }, /* A_C */
{ 7, 7, 0, 0, 127, 0, -1, 0 }, /* A_S */
{ 7, 7, 0, 0, 127, 0, -1, 0 }, /* A_H */
{ 0, 0, 0, 0, -1, 0, -1, 0 }, /* A_P */
{ 7, 14, 0, 0, -1, 0, -1, BFD_RELOC_SPU_IMM7 }, /* A_S3 */
{ 7, 14, 0, -32, 31, -31, 0, BFD_RELOC_SPU_IMM7 }, /* A_S6 */
{ 7, 14, 0, 0, -1, 0, -1, BFD_RELOC_SPU_IMM7 }, /* A_S7N */
{ 7, 14, 0, -64, 63, -63, 0, BFD_RELOC_SPU_IMM7 }, /* A_S7 */
{ 8, 14, 0, 0, 127, 0, -1, BFD_RELOC_SPU_IMM8 }, /* A_U7A */
{ 8, 14, 0, 0, 127, 0, -1, BFD_RELOC_SPU_IMM8 }, /* A_U7B */
{ 10, 14, 0, -512, 511, -128, 255, BFD_RELOC_SPU_IMM10 }, /* A_S10B */
{ 10, 14, 0, -512, 511, 0, -1, BFD_RELOC_SPU_IMM10 }, /* A_S10 */
{ 2, 23, 9, -1024, 1023, 0, -1, BFD_RELOC_SPU_PCREL9a }, /* A_S11 */
{ 2, 14, 9, -1024, 1023, 0, -1, BFD_RELOC_SPU_PCREL9b }, /* A_S11I */
{ 10, 14, 4, -8192, 8191, 0, -1, BFD_RELOC_SPU_IMM10W }, /* A_S14 */
{ 16, 7, 0, -32768, 32767, 0, -1, BFD_RELOC_SPU_IMM16 }, /* A_S16 */
{ 16, 7, 2, -131072, 262143, 0, -1, BFD_RELOC_SPU_IMM16W }, /* A_S18 */
{ 16, 7, 2, -262144, 262143, 0, -1, BFD_RELOC_SPU_PCREL16 }, /* A_R18 */
{ 7, 14, 0, 0, -1, 0, -1, BFD_RELOC_SPU_IMM7 }, /* A_U3 */
{ 7, 14, 0, 0, 127, 0, 31, BFD_RELOC_SPU_IMM7 }, /* A_U5 */
{ 7, 14, 0, 0, 127, 0, 63, BFD_RELOC_SPU_IMM7 }, /* A_U6 */
{ 7, 14, 0, 0, -1, 0, -1, BFD_RELOC_SPU_IMM7 }, /* A_U7 */
{ 14, 0, 0, 0, 16383, 0, -1, 0 }, /* A_U14 */
{ 16, 7, 0, -32768, 65535, 0, -1, BFD_RELOC_SPU_IMM16 }, /* A_X16 */
{ 18, 7, 0, 0, 262143, 0, -1, BFD_RELOC_SPU_IMM18 }, /* A_U18 */
};
/* Some flags for handling errors. This is very hackish and added after
* the fact. */
static int syntax_error_arg;
static const char *syntax_error_param;
static int syntax_reg;
static char *
insn_fmt_string (struct spu_opcode *format)
{
static char buf[64];
int len = 0;
int i;
len += sprintf (&buf[len], "%s\t", format->mnemonic);
for (i = 1; i <= format->arg[0]; i++)
{
int arg = format->arg[i];
char *exp;
if (i > 1 && arg != A_P && format->arg[i-1] != A_P)
buf[len++] = ',';
if (arg == A_P)
exp = "(";
else if (arg < A_P)
exp = i == syntax_error_arg ? "REG" : "reg";
else
exp = i == syntax_error_arg ? "IMM" : "imm";
len += sprintf (&buf[len], "%s", exp);
if (i > 1 && format->arg[i-1] == A_P)
buf[len++] = ')';
}
buf[len] = 0;
return buf;
}
void
md_assemble (char *op)
{
char *param, *thisfrag;
char c;
struct spu_opcode *format;
struct spu_insn insn;
int i;
assert (op);
/* skip over instruction to find parameters */
for (param = op; *param != 0 && !ISSPACE (*param); param++)
;
c = *param;
*param = 0;
if (c != 0 && c != '\n')
param++;
/* try to find the instruction in the hash table */
if ((format = (struct spu_opcode *) hash_find (op_hash, op)) == NULL)
{
as_bad (_("Invalid mnemonic '%s'"), op);
return;
}
if (!use_dd2 && strcmp (format->mnemonic, "orx") == 0)
{
as_bad (_("'%s' is only available in DD2.0 or higher."), op);
return;
}
while (1)
{
/* try parsing this instruction into insn */
for (i = 0; i < MAX_RELOCS; i++)
{
insn.exp[i].X_add_symbol = 0;
insn.exp[i].X_op_symbol = 0;
insn.exp[i].X_add_number = 0;
insn.exp[i].X_op = O_illegal;
insn.reloc_arg[i] = -1;
insn.reloc[i] = BFD_RELOC_NONE;
}
insn.opcode = format->opcode;
insn.tag = (enum spu_insns) (format - spu_opcodes);
syntax_error_arg = 0;
syntax_error_param = 0;
syntax_reg = 0;
if (calcop (format, param, &insn))
break;
/* if it doesn't parse try the next instruction */
if (!strcmp (format[0].mnemonic, format[1].mnemonic))
format++;
else
{
int parg = format[0].arg[syntax_error_arg-1];
as_fatal (_("Error in argument %d. Expecting: \"%s\""),
syntax_error_arg - (parg == A_P),
insn_fmt_string (format));
return;
}
}
if ((syntax_reg & 4)
&& ! (insn.tag == M_RDCH
|| insn.tag == M_RCHCNT
|| insn.tag == M_WRCH))
as_warn (_("Mixing register syntax, with and without '$'."));
if (syntax_error_param)
{
const char *d = syntax_error_param;
while (*d != '$')
d--;
as_warn (_("Treating '%-*s' as a symbol."), (int)(syntax_error_param - d), d);
}
/* grow the current frag and plop in the opcode */
thisfrag = frag_more (4);
md_number_to_chars (thisfrag, insn.opcode, 4);
/* if this instruction requires labels mark it for later */
for (i = 0; i < MAX_RELOCS; i++)
if (insn.reloc_arg[i] >= 0)
{
fixS *fixP;
bfd_reloc_code_real_type reloc = insn.reloc[i];
int pcrel = 0;
if (reloc == BFD_RELOC_SPU_PCREL9a
|| reloc == BFD_RELOC_SPU_PCREL9b
|| reloc == BFD_RELOC_SPU_PCREL16)
pcrel = 1;
fixP = fix_new_exp (frag_now,
thisfrag - frag_now->fr_literal,
4,
&insn.exp[i],
pcrel,
reloc);
fixP->tc_fix_data.arg_format = insn.reloc_arg[i];
fixP->tc_fix_data.insn_tag = insn.tag;
}
dwarf2_emit_insn (4);
}
static int
calcop (struct spu_opcode *format, const char *param, struct spu_insn *insn)
{
int i;
int paren = 0;
int arg;
for (i = 1; i <= format->arg[0]; i++)
{
arg = format->arg[i];
syntax_error_arg = i;
while (ISSPACE (*param))
param++;
if (*param == 0 || *param == ',')
return 0;
if (arg < A_P)
param = get_reg (param, insn, arg, 1);
else if (arg > A_P)
param = get_imm (param, insn, arg);
else if (arg == A_P)
{
paren++;
if ('(' != *param++)
return 0;
}
if (!param)
return 0;
while (ISSPACE (*param))
param++;
if (arg != A_P && paren)
{
paren--;
if (')' != *param++)
return 0;
}
else if (i < format->arg[0]
&& format->arg[i] != A_P
&& format->arg[i+1] != A_P)
{
if (',' != *param++)
{
syntax_error_arg++;
return 0;
}
}
}
while (ISSPACE (*param))
param++;
return !paren && (*param == 0 || *param == '\n');
}
struct reg_name {
unsigned int regno;
unsigned int length;
char name[32];
};
#define REG_NAME(NO,NM) { NO, sizeof (NM) - 1, NM }
static struct reg_name reg_name[] = {
REG_NAME (0, "lr"), /* link register */
REG_NAME (1, "sp"), /* stack pointer */
REG_NAME (0, "rp"), /* link register */
REG_NAME (127, "fp"), /* frame pointer */
};
static struct reg_name sp_reg_name[] = {
};
static struct reg_name ch_reg_name[] = {
REG_NAME ( 0, "SPU_RdEventStat"),
REG_NAME ( 1, "SPU_WrEventMask"),
REG_NAME ( 2, "SPU_WrEventAck"),
REG_NAME ( 3, "SPU_RdSigNotify1"),
REG_NAME ( 4, "SPU_RdSigNotify2"),
REG_NAME ( 7, "SPU_WrDec"),
REG_NAME ( 8, "SPU_RdDec"),
REG_NAME ( 11, "SPU_RdEventMask"), /* DD2.0 only */
REG_NAME ( 13, "SPU_RdMachStat"),
REG_NAME ( 14, "SPU_WrSRR0"),
REG_NAME ( 15, "SPU_RdSRR0"),
REG_NAME ( 28, "SPU_WrOutMbox"),
REG_NAME ( 29, "SPU_RdInMbox"),
REG_NAME ( 30, "SPU_WrOutIntrMbox"),
REG_NAME ( 9, "MFC_WrMSSyncReq"),
REG_NAME ( 12, "MFC_RdTagMask"), /* DD2.0 only */
REG_NAME ( 16, "MFC_LSA"),
REG_NAME ( 17, "MFC_EAH"),
REG_NAME ( 18, "MFC_EAL"),
REG_NAME ( 19, "MFC_Size"),
REG_NAME ( 20, "MFC_TagID"),
REG_NAME ( 21, "MFC_Cmd"),
REG_NAME ( 22, "MFC_WrTagMask"),
REG_NAME ( 23, "MFC_WrTagUpdate"),
REG_NAME ( 24, "MFC_RdTagStat"),
REG_NAME ( 25, "MFC_RdListStallStat"),
REG_NAME ( 26, "MFC_WrListStallAck"),
REG_NAME ( 27, "MFC_RdAtomicStat"),
};
#undef REG_NAME
static const char *
get_reg (const char *param, struct spu_insn *insn, int arg, int accept_expr)
{
unsigned regno;
int saw_prefix = 0;
if (*param == '$')
{
saw_prefix = 1;
param++;
}
if (arg == A_H) /* Channel */
{
if ((param[0] == 'c' || param[0] == 'C')
&& (param[1] == 'h' || param[1] == 'H')
&& ISDIGIT (param[2]))
param += 2;
}
else if (arg == A_S) /* Special purpose register */
{
if ((param[0] == 's' || param[0] == 'S')
&& (param[1] == 'p' || param[1] == 'P')
&& ISDIGIT (param[2]))
param += 2;
}
if (ISDIGIT (*param))
{
regno = 0;
while (ISDIGIT (*param))
regno = regno * 10 + *param++ - '0';
}
else
{
struct reg_name *rn;
unsigned int i, n, l = 0;
if (arg == A_H) /* Channel */
{
rn = ch_reg_name;
n = sizeof (ch_reg_name) / sizeof (*ch_reg_name);
}
else if (arg == A_S) /* Special purpose register */
{
rn = sp_reg_name;
n = sizeof (sp_reg_name) / sizeof (*sp_reg_name);
}
else
{
rn = reg_name;
n = sizeof (reg_name) / sizeof (*reg_name);
}
regno = 128;
for (i = 0; i < n; i++)
if (rn[i].length > l
&& 0 == strncasecmp (param, rn[i].name, rn[i].length))
{
l = rn[i].length;
regno = rn[i].regno;
}
param += l;
}
if (!use_dd2
&& arg == A_H)
{
if (regno == 11)
as_bad (_("'SPU_RdEventMask' (channel 11) is only available in DD2.0 or higher."));
else if (regno == 12)
as_bad (_("'MFC_RdTagMask' (channel 12) is only available in DD2.0 or higher."));
}
if (regno < 128)
{
insn->opcode |= regno << arg_encode[arg].pos;
if ((!saw_prefix && syntax_reg == 1)
|| (saw_prefix && syntax_reg == 2))
syntax_reg |= 4;
syntax_reg |= saw_prefix ? 1 : 2;
return param;
}
if (accept_expr)
{
char *save_ptr;
expressionS ex;
save_ptr = input_line_pointer;
input_line_pointer = (char *)param;
expression (&ex);
param = input_line_pointer;
input_line_pointer = save_ptr;
if (ex.X_op == O_register || ex.X_op == O_constant)
{
insn->opcode |= ex.X_add_number << arg_encode[arg].pos;
return param;
}
}
return 0;
}
static const char *
get_imm (const char *param, struct spu_insn *insn, int arg)
{
int val;
char *save_ptr;
int low = 0, high = 0;
int reloc_i = insn->reloc_arg[0] >= 0 ? 1 : 0;
if (strncasecmp (param, "%lo(", 4) == 0)
{
param += 3;
low = 1;
as_warn (_("Using old style, %%lo(expr), please change to PPC style, expr@l."));
}
else if (strncasecmp (param, "%hi(", 4) == 0)
{
param += 3;
high = 1;
as_warn (_("Using old style, %%hi(expr), please change to PPC style, expr@h."));
}
else if (strncasecmp (param, "%pic(", 5) == 0)
{
/* Currently we expect %pic(expr) == expr, so do nothing here.
i.e. for code loaded at address 0 $toc will be 0. */
param += 4;
}
if (*param == '$')
{
/* Symbols can start with $, but if this symbol matches a register
name, it's probably a mistake. The only way to avoid this
warning is to rename the symbol. */
struct spu_insn tmp_insn;
const char *np = get_reg (param, &tmp_insn, arg, 0);
if (np)
syntax_error_param = np;
}
save_ptr = input_line_pointer;
input_line_pointer = (char *) param;
expression (&insn->exp[reloc_i]);
param = input_line_pointer;
input_line_pointer = save_ptr;
/* Similar to ppc_elf_suffix in tc-ppc.c. We have so few cases to
handle we do it inlined here. */
if (param[0] == '@' && !ISALNUM (param[2]) && param[2] != '@')
{
if (param[1] == 'h' || param[1] == 'H')
{
high = 1;
param += 2;
}
else if (param[1] == 'l' || param[1] == 'L')
{
low = 1;
param += 2;
}
}
if (insn->exp[reloc_i].X_op == O_constant)
{
val = insn->exp[reloc_i].X_add_number;
if (emulate_apuasm)
{
/* Convert the value to a format we expect. */
val <<= arg_encode[arg].rshift;
if (arg == A_U7A)
val = 173 - val;
else if (arg == A_U7B)
val = 155 - val;
}
if (high)
val = val >> 16;
else if (low)
val = val & 0xffff;
/* Warn about out of range expressions. */
{
int hi = arg_encode[arg].hi;
int lo = arg_encode[arg].lo;
int whi = arg_encode[arg].whi;
int wlo = arg_encode[arg].wlo;
if (hi > lo && (val < lo || val > hi))
as_fatal (_("Constant expression %d out of range, [%d, %d]."),
val, lo, hi);
else if (whi > wlo && (val < wlo || val > whi))
as_warn (_("Constant expression %d out of range, [%d, %d]."),
val, wlo, whi);
}
if (arg == A_U7A)
val = 173 - val;
else if (arg == A_U7B)
val = 155 - val;
/* Branch hints have a split encoding. Do the bottom part. */
if (arg == A_S11 || arg == A_S11I)
insn->opcode |= ((val >> 2) & 0x7f);
insn->opcode |= (((val >> arg_encode[arg].rshift)
& ((1 << arg_encode[arg].size) - 1))
<< arg_encode[arg].pos);
}
else
{
insn->reloc_arg[reloc_i] = arg;
if (high)
insn->reloc[reloc_i] = BFD_RELOC_SPU_HI16;
else if (low)
insn->reloc[reloc_i] = BFD_RELOC_SPU_LO16;
else
insn->reloc[reloc_i] = arg_encode[arg].reloc;
}
return param;
}
#define MAX_LITTLENUMS 6
/* Turn a string in input_line_pointer into a floating point constant of type
type, and store the appropriate bytes in *litP. The number of LITTLENUMS
emitted is stored in *sizeP . An error message is returned, or NULL on OK.
*/
char *
md_atof (int type, char *litP, int *sizeP)
{
int prec;
LITTLENUM_TYPE words[MAX_LITTLENUMS];
LITTLENUM_TYPE *wordP;
char *t;
switch (type)
{
case 'f':
case 'F':
case 's':
case 'S':
prec = 2;
break;
case 'd':
case 'D':
case 'r':
case 'R':
prec = 4;
break;
case 'x':
case 'X':
prec = 6;
break;
case 'p':
case 'P':
prec = 6;
break;
default:
*sizeP = 0;
return _("Bad call to MD_ATOF()");
}
t = atof_ieee (input_line_pointer, type, words);
if (t)
input_line_pointer = t;
*sizeP = prec * sizeof (LITTLENUM_TYPE);
for (wordP = words; prec--;)
{
md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
litP += sizeof (LITTLENUM_TYPE);
}
return 0;
}
#ifndef WORKING_DOT_WORD
int md_short_jump_size = 4;
void
md_create_short_jump (char *ptr,
addressT from_addr ATTRIBUTE_UNUSED,
addressT to_addr ATTRIBUTE_UNUSED,
fragS *frag,
symbolS *to_symbol)
{
ptr[0] = (char) 0xc0;
ptr[1] = 0x00;
ptr[2] = 0x00;
ptr[3] = 0x00;
fix_new (frag,
ptr - frag->fr_literal,
4,
to_symbol,
(offsetT) 0,
0,
BFD_RELOC_SPU_PCREL16);
}
int md_long_jump_size = 4;
void
md_create_long_jump (char *ptr,
addressT from_addr ATTRIBUTE_UNUSED,
addressT to_addr ATTRIBUTE_UNUSED,
fragS *frag,
symbolS *to_symbol)
{
ptr[0] = (char) 0xc0;
ptr[1] = 0x00;
ptr[2] = 0x00;
ptr[3] = 0x00;
fix_new (frag,
ptr - frag->fr_literal,
4,
to_symbol,
(offsetT) 0,
0,
BFD_RELOC_SPU_PCREL16);
}
#endif
/* Support @ppu on symbols referenced in .int/.long/.word/.quad. */
static void
spu_cons (int nbytes)
{
expressionS exp;
if (is_it_end_of_statement ())
{
demand_empty_rest_of_line ();
return;
}
do
{
deferred_expression (&exp);
if ((exp.X_op == O_symbol
|| exp.X_op == O_constant)
&& strncasecmp (input_line_pointer, "@ppu", 4) == 0)
{
char *p = frag_more (nbytes);
enum bfd_reloc_code_real reloc;
/* Check for identifier@suffix+constant. */
input_line_pointer += 4;
if (*input_line_pointer == '-' || *input_line_pointer == '+')
{
expressionS new_exp;
expression (&new_exp);
if (new_exp.X_op == O_constant)
exp.X_add_number += new_exp.X_add_number;
}
reloc = nbytes == 4 ? BFD_RELOC_SPU_PPU32 : BFD_RELOC_SPU_PPU64;
fix_new_exp (frag_now, p - frag_now->fr_literal, nbytes,
&exp, 0, reloc);
}
else
emit_expr (&exp, nbytes);
}
while (*input_line_pointer++ == ',');
/* Put terminator back into stream. */
input_line_pointer--;
demand_empty_rest_of_line ();
}
int
md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
segT segment_type ATTRIBUTE_UNUSED)
{
as_fatal (_("Relaxation should never occur"));
return -1;
}
/* If while processing a fixup, a reloc really needs to be created,
then it is done here. */
arelent *
tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp)
{
arelent *reloc;
reloc = (arelent *) xmalloc (sizeof (arelent));
reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
if (fixp->fx_addsy)
*reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
else if (fixp->fx_subsy)
*reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_subsy);
else
abort ();
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
if (reloc->howto == (reloc_howto_type *) NULL)
{
as_bad_where (fixp->fx_file, fixp->fx_line,
_("reloc %d not supported by object file format"),
(int) fixp->fx_r_type);
return NULL;
}
reloc->addend = fixp->fx_addnumber;
return reloc;
}
/* Round up a section's size to the appropriate boundary. */
valueT
md_section_align (segT seg, valueT size)
{
int align = bfd_get_section_alignment (stdoutput, seg);
valueT mask = ((valueT) 1 << align) - 1;
return (size + mask) & ~mask;
}
/* Where a PC relative offset is calculated from. On the spu they
are calculated from the beginning of the branch instruction. */
long
md_pcrel_from (fixS *fixp)
{
return fixp->fx_frag->fr_address + fixp->fx_where;
}
/* Fill in rs_align_code fragments. */
void
spu_handle_align (fragS *fragp)
{
static const unsigned char nop_pattern[8] = {
0x40, 0x20, 0x00, 0x00, /* even nop */
0x00, 0x20, 0x00, 0x00, /* odd nop */
};
int bytes;
char *p;
if (fragp->fr_type != rs_align_code)
return;
bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix;
p = fragp->fr_literal + fragp->fr_fix;
if (bytes & 3)
{
int fix = bytes & 3;
memset (p, 0, fix);
p += fix;
bytes -= fix;
fragp->fr_fix += fix;
}
if (bytes & 4)
{
memcpy (p, &nop_pattern[4], 4);
p += 4;
bytes -= 4;
fragp->fr_fix += 4;
}
memcpy (p, nop_pattern, 8);
fragp->fr_var = 8;
}
void
md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
{
unsigned int res;
valueT val = *valP;
char *place = fixP->fx_where + fixP->fx_frag->fr_literal;
if (fixP->fx_subsy != (symbolS *) NULL)
{
/* We can't actually support subtracting a symbol. */
as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
}
if (fixP->fx_addsy != NULL)
{
if (fixP->fx_pcrel)
{
/* Hack around bfd_install_relocation brain damage. */
val += fixP->fx_frag->fr_address + fixP->fx_where;
switch (fixP->fx_r_type)
{
case BFD_RELOC_32:
fixP->fx_r_type = BFD_RELOC_32_PCREL;
break;
case BFD_RELOC_SPU_PCREL16:
case BFD_RELOC_SPU_PCREL9a:
case BFD_RELOC_SPU_PCREL9b:
case BFD_RELOC_32_PCREL:
break;
default:
as_bad_where (fixP->fx_file, fixP->fx_line,
_("expression too complex"));
break;
}
}
}
fixP->fx_addnumber = val;
if (fixP->fx_r_type == BFD_RELOC_SPU_PPU32
|| fixP->fx_r_type == BFD_RELOC_SPU_PPU64)
return;
if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
{
fixP->fx_done = 1;
res = 0;
if (fixP->tc_fix_data.arg_format > A_P)
{
int hi = arg_encode[fixP->tc_fix_data.arg_format].hi;
int lo = arg_encode[fixP->tc_fix_data.arg_format].lo;
if (hi > lo && ((offsetT) val < lo || (offsetT) val > hi))
as_bad_where (fixP->fx_file, fixP->fx_line,
"Relocation doesn't fit. (relocation value = 0x%lx)",
(long) val);
}
switch (fixP->fx_r_type)
{
case BFD_RELOC_8:
md_number_to_chars (place, val, 1);
return;
case BFD_RELOC_16:
md_number_to_chars (place, val, 2);
return;
case BFD_RELOC_32:
md_number_to_chars (place, val, 4);
return;
case BFD_RELOC_64:
md_number_to_chars (place, val, 8);
return;
case BFD_RELOC_SPU_IMM7:
res = (val & 0x7f) << 14;
break;
case BFD_RELOC_SPU_IMM8:
res = (val & 0xff) << 14;
break;
case BFD_RELOC_SPU_IMM10:
res = (val & 0x3ff) << 14;
break;
case BFD_RELOC_SPU_IMM10W:
res = (val & 0x3ff0) << 10;
break;
case BFD_RELOC_SPU_IMM16:
res = (val & 0xffff) << 7;
break;
case BFD_RELOC_SPU_IMM16W:
res = (val & 0x3fffc) << 5;
break;
case BFD_RELOC_SPU_IMM18:
res = (val & 0x3ffff) << 7;
break;
case BFD_RELOC_SPU_PCREL9a:
res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 14);
break;
case BFD_RELOC_SPU_PCREL9b:
res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 5);
break;
case BFD_RELOC_SPU_PCREL16:
res = (val & 0x3fffc) << 5;
break;
default:
as_bad_where (fixP->fx_file, fixP->fx_line,
_("reloc %d not supported by object file format"),
(int) fixP->fx_r_type);
}
if (res != 0)
{
place[0] |= (res >> 24) & 0xff;
place[1] |= (res >> 16) & 0xff;
place[2] |= (res >> 8) & 0xff;
place[3] |= (res) & 0xff;
}
}
}
Reference in New Issue View Git Blame Copy Permalink