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-rw-r--r--opcodes/arc-opc.c161
1 files changed, 114 insertions, 47 deletions
diff --git a/opcodes/arc-opc.c b/opcodes/arc-opc.c
index ea9c742..e0cdef6 100644
--- a/opcodes/arc-opc.c
+++ b/opcodes/arc-opc.c
@@ -16,9 +16,6 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-/* The ARC may eventually be bi-endian.
- Keep this file byte order independent. */
-
#include "ansidecl.h"
#include "opcode/arc.h"
@@ -40,6 +37,7 @@ INSERT_FN (insert_flagfinish);
INSERT_FN (insert_cond);
INSERT_FN (insert_forcelimm);
INSERT_FN (insert_reladdr);
+INSERT_FN (insert_absaddr);
INSERT_FN (insert_unopmacro);
INSERT_FN (insert_multshift);
@@ -67,7 +65,8 @@ EXTRACT_FN (extract_multshift);
'n' DELAY N field (nullify field)
'q' COND condition code field
'Q' FORCELIMM set `cond_p' to 1 to ensure a constant is a limm
- 'B' BRANCH branch address
+ 'B' BRANCH branch address (22 bit pc relative)
+ 'J' JUMP jump address (26 bit absolute)
'z' SIZE1 size field in ld a,[b,c]
'Z' SIZE10 size field in ld a,[b,shimm]
'y' SIZE22 size field in st c,[b,shimm]
@@ -76,9 +75,9 @@ EXTRACT_FN (extract_multshift);
'w' ADDRESS3 write-back field in ld a,[b,c]
'W' ADDRESS12 write-back field in ld a,[b,shimm]
'v' ADDRESS24 write-back field in st c,[b,shimm]
- 'D' CACHEBYPASS5 direct to memory enable (cache bypass) in ld a,[b,c]
- 'e' CACHEBYPASS14 direct to memory enable (cache bypass) in ld a,[b,shimm]
- 'E' CACHEBYPASS26 direct to memory enable (cache bypass) in st c,[b,shimm]
+ 'e' CACHEBYPASS5 cache bypass in ld a,[b,c]
+ 'E' CACHEBYPASS14 cache bypass in ld a,[b,shimm]
+ 'D' CACHEBYPASS26 cache bypass in st c,[b,shimm]
'u' UNSIGNED unsigned multiply
's' SATURATION saturation limit in audio arc mac insn
'U' UNOPMACRO fake operand to copy REGB to REGC for unop macros
@@ -116,9 +115,10 @@ const struct arc_operand arc_operands[] =
#define SHIMMFINISH (REGC + 1)
{ 'S', 9, 0, ARC_OPERAND_SIGNED + ARC_OPERAND_FAKE, insert_shimmfinish, 0 },
-/* fake operand used to insert limm value into most instructions */
+/* fake operand used to insert limm value into most instructions;
+ this is also used for .word handling */
#define LIMMFINISH (SHIMMFINISH + 1)
- { 'L', 32, 32, ARC_OPERAND_ABSOLUTE + ARC_OPERAND_FAKE, insert_limmfinish, 0 },
+ { 'L', 32, 32, ARC_OPERAND_ADDRESS + ARC_OPERAND_LIMM + ARC_OPERAND_FAKE, insert_limmfinish, 0 },
/* shimm operand when there is no reg indicator (ld,st) */
#define SHIMMOFFSET (LIMMFINISH + 1)
@@ -152,12 +152,17 @@ const struct arc_operand arc_operands[] =
#define FORCELIMM (COND + 1)
{ 'Q', 0, 0, ARC_OPERAND_FAKE, insert_forcelimm },
-/* branch address b, bl, and lp insns */
+/* branch address; b, bl, and lp insns */
#define BRANCH (FORCELIMM + 1)
- { 'B', 20, 7, ARC_OPERAND_RELATIVE + ARC_OPERAND_SIGNED, insert_reladdr, extract_reladdr },
+ { 'B', 20, 7, ARC_OPERAND_RELATIVE_BRANCH + ARC_OPERAND_SIGNED, insert_reladdr, extract_reladdr },
+
+/* jump address; j insn (this is basically the same as 'L' except that the
+ value is right shifted by 2); this is also used for .word handling */
+#define JUMP (BRANCH + 1)
+ { 'J', 24, 32, ARC_OPERAND_ABSOLUTE_BRANCH + ARC_OPERAND_LIMM + ARC_OPERAND_FAKE, insert_absaddr },
/* size field, stored in bit 1,2 */
-#define SIZE1 (BRANCH + 1)
+#define SIZE1 (JUMP + 1)
{ 'z', 2, 1, ARC_OPERAND_SUFFIX },
/* size field, stored in bit 10,11 */
@@ -190,15 +195,15 @@ const struct arc_operand arc_operands[] =
/* cache bypass, stored in bit 5 */
#define CACHEBYPASS5 (ADDRESS24 + 1)
- { 'D', 1, 5, ARC_OPERAND_SUFFIX },
+ { 'e', 1, 5, ARC_OPERAND_SUFFIX },
/* cache bypass, stored in bit 14 */
#define CACHEBYPASS14 (CACHEBYPASS5 + 1)
- { 'e', 1, 14, ARC_OPERAND_SUFFIX },
+ { 'E', 1, 14, ARC_OPERAND_SUFFIX },
/* cache bypass, stored in bit 26 */
#define CACHEBYPASS26 (CACHEBYPASS14 + 1)
- { 'E', 1, 26, ARC_OPERAND_SUFFIX },
+ { 'D', 1, 26, ARC_OPERAND_SUFFIX },
/* unsigned multiply */
#define UNSIGNED (CACHEBYPASS26 + 1)
@@ -229,7 +234,7 @@ const struct arc_operand arc_operands[] =
/* end of list place holder */
{ 0 }
};
-
+
/* Given a format letter, yields the index into `arc_operands'.
eg: arc_operand_map['a'] = REGA. */
unsigned char arc_operand_map[256];
@@ -252,7 +257,10 @@ unsigned char arc_operand_map[256];
Longer versions of insns must appear before shorter ones (if gas sees
"lsr r2,r3,1" when it's parsing "lsr %a,%b" it will think the ",1" is
- junk). */
+ junk).
+
+ This table is best viewed on a wide screen (161 columns).
+ I'd prefer to keep it this way. */
/* ??? This table also includes macros: asl, lsl, and mov. The ppc port has
a more general facility for dealing with macros which could be used if
@@ -287,12 +295,13 @@ const struct arc_opcode arc_opcodes[] = {
{ "extw%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(8) },
{ "flag%.q %b%G%S%L", I(-1)+A(-1)+C(-1), I(3)+A(ARC_REG_SHIMM_UPDATE)+C(0) },
/* %Q: force cond_p=1 --> no shimm values */
- { "j%q%Q%.n%.f %b%L", I(-1)+A(-1)+C(-1)+R(-1,7,1), I(7)+A(0)+C(0)+R(0,7,1) },
+ /* ??? This insn allows an optional flags spec. */
+ { "j%q%Q%.n%.f %b%J", I(-1)+A(-1)+C(-1)+R(-1,7,1), I(7)+A(0)+C(0)+R(0,7,1) },
/* Put opcode 1 ld insns first so shimm gets prefered over limm. */
/* "[%b]" is before "[%b,%d]" so 0 offsets don't get printed. */
- { "ld%Z%.X%.v%.e %0%a,[%b]%L", I(-1)+R(-1,13,1)+R(-1,0,511), I(1)+R(0,13,1)+R(0,0,511) },
- { "ld%Z%.X%.v%.e %a,[%b,%d]%S%L", I(-1)+R(-1,13,1), I(1)+R(0,13,1) },
- { "ld%z%.x%.u%.D %a,[%b,%c]", I(-1)+R(-1,4,1)+R(-1,6,7), I(0)+R(0,4,1)+R(0,6,7) },
+ { "ld%Z%.X%.W%.E %0%a,[%b]%L", I(-1)+R(-1,13,1)+R(-1,0,511), I(1)+R(0,13,1)+R(0,0,511) },
+ { "ld%Z%.X%.W%.E %a,[%b,%d]%S%L", I(-1)+R(-1,13,1), I(1)+R(0,13,1) },
+ { "ld%z%.x%.w%.e %a,[%b,%c]", I(-1)+R(-1,4,1)+R(-1,6,7), I(0)+R(0,4,1)+R(0,6,7) },
{ "lp%q%.n %B", I(-1), I(6), },
{ "lr %a,[%Ab]%S%L", I(-1)+C(-1), I(1)+C(0x10) },
/* Note that "lsl" is really an "add". */
@@ -320,13 +329,13 @@ const struct arc_opcode arc_opcodes[] = {
{ "sexw%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(6) },
{ "sr %c,[%Ab]%S%L", I(-1)+A(-1), I(2)+A(0x10) },
/* "[%b]" is before "[%b,%d]" so 0 offsets don't get printed. */
- { "st%y%.w%.E %0%c,[%b]%L", I(-1)+R(-1,25,3)+R(-1,21,1)+R(-1,0,511), I(2)+R(0,25,3)+R(0,21,1)+R(0,0,511) },
- { "st%y%.w%.E %c,[%b,%d]%S%L", I(-1)+R(-1,25,3)+R(-1,21,1), I(2)+R(0,25,3)+R(0,21,1) },
+ { "st%y%.v%.D %0%c,[%b]%L", I(-1)+R(-1,25,3)+R(-1,21,1)+R(-1,0,511), I(2)+R(0,25,3)+R(0,21,1)+R(0,0,511) },
+ { "st%y%.v%.D %c,[%b,%d]%S%L", I(-1)+R(-1,25,3)+R(-1,21,1), I(2)+R(0,25,3)+R(0,21,1) },
{ "sub%.q%.f %a,%b,%c%F%S%L", I(-1), I(10) },
{ "swap%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(9), ARC_MACH_AUDIO },
{ "xor%.q%.f %a,%b,%c%F%S%L", I(-1), I(15) }
};
-int arc_opcodes_count = sizeof (arc_opcodes) / sizeof (arc_opcodes[0]);
+const int arc_opcodes_count = sizeof (arc_opcodes) / sizeof (arc_opcodes[0]);
const struct arc_operand_value arc_reg_names[] =
{
@@ -432,7 +441,7 @@ const struct arc_operand_value arc_reg_names[] =
{ "sram", 0x400, AUXREG, ARC_MACH_AUDIO },
{ "reg_file", 0x800, AUXREG, ARC_MACH_AUDIO },
};
-int arc_reg_names_count = sizeof (arc_reg_names) / sizeof (arc_reg_names[0]);
+const int arc_reg_names_count = sizeof (arc_reg_names) / sizeof (arc_reg_names[0]);
/* The suffix table.
Operands with the same name must be stored together. */
@@ -472,13 +481,13 @@ const struct arc_operand_value arc_suffixes[] =
{ "nd", 0, DELAY },
{ "d", 1, DELAY },
{ "jd", 2, DELAY },
-/* { "b", 7, SIZEEXT },*/
-/* { "b", 5, SIZESEX },*/
+/*{ "b", 7, SIZEEXT },*/
+/*{ "b", 5, SIZESEX },*/
{ "b", 1, SIZE1 },
{ "b", 1, SIZE10 },
{ "b", 1, SIZE22 },
-/* { "w", 8, SIZEEXT },*/
-/* { "w", 6, SIZESEX },*/
+/*{ "w", 8, SIZEEXT },*/
+/*{ "w", 6, SIZESEX },*/
{ "w", 2, SIZE1 },
{ "w", 2, SIZE10 },
{ "w", 2, SIZE22 },
@@ -498,30 +507,53 @@ const struct arc_operand_value arc_suffixes[] =
{ "mh", 18, COND, ARC_MACH_AUDIO },
{ "ml", 19, COND, ARC_MACH_AUDIO },
};
-int arc_suffixes_count = sizeof (arc_suffixes) / sizeof (arc_suffixes[0]);
-
+const int arc_suffixes_count = sizeof (arc_suffixes) / sizeof (arc_suffixes[0]);
+
/* Configuration flags. */
/* Various ARC_HAVE_XXX bits. */
static int cpu_type;
+/* Translate a bfd_mach_arc_xxx value to a ARC_MACH_XXX value. */
+
+int
+arc_get_opcode_mach (bfd_mach, big_p)
+ int bfd_mach, big_p;
+{
+ static int mach_type_map[] =
+ {
+ ARC_MACH_BASE, ARC_MACH_HOST, ARC_MACH_GRAPHICS, ARC_MACH_AUDIO
+ };
+
+ return mach_type_map[bfd_mach] | (big_p ? ARC_MACH_BIG : 0);
+}
+
/* Initialize any tables that need it.
Must be called once at start up (or when first needed).
- FLAGS is a set of bits that say what version of the cpu we have. */
+ FLAGS is a set of bits that say what version of the cpu we have,
+ and in particular at least (one of) ARC_MACH_XXX. */
void
arc_opcode_init_tables (flags)
int flags;
{
register int i,n;
+ static int map_init_p = 0;
cpu_type = flags;
- memset (arc_operand_map, 0, sizeof (arc_operand_map));
- n = sizeof (arc_operands) / sizeof (arc_operands[0]);
- for (i = 0; i < n; i++)
- arc_operand_map[arc_operands[i].fmt] = i;
+ /* We may be intentionally called more than once (for example gdb will call
+ us each time the user switches cpu). This table only needs to be init'd
+ once though. */
+ if (!map_init_p)
+ {
+ memset (arc_operand_map, 0, sizeof (arc_operand_map));
+ n = sizeof (arc_operands) / sizeof (arc_operands[0]);
+ for (i = 0; i < n; i++)
+ arc_operand_map[arc_operands[i].fmt] = i;
+ map_init_p = 1;
+ }
}
/* Return non-zero if OPCODE is supported on the specified cpu.
@@ -531,9 +563,9 @@ int
arc_opcode_supported (opcode)
const struct arc_opcode *opcode;
{
- if (ARC_OPCODE_MACH (opcode->flags) == 0)
+ if (ARC_OPCODE_CPU (opcode->flags) == 0)
return 1;
- if (ARC_OPCODE_MACH (opcode->flags) & ARC_HAVE_MACH (cpu_type))
+ if (ARC_OPCODE_CPU (opcode->flags) & ARC_HAVE_CPU (cpu_type))
return 1;
return 0;
}
@@ -545,9 +577,9 @@ int
arc_opval_supported (opval)
const struct arc_operand_value *opval;
{
- if (ARC_OPVAL_MACH (opval->flags) == 0)
+ if (ARC_OPVAL_CPU (opval->flags) == 0)
return 1;
- if (ARC_OPVAL_MACH (opval->flags) & ARC_HAVE_MACH (cpu_type))
+ if (ARC_OPVAL_CPU (opval->flags) & ARC_HAVE_CPU (cpu_type))
return 1;
return 0;
}
@@ -575,6 +607,8 @@ static int limm_p;
/* The value of the limm we inserted. Each insn only gets one but it can
appear multiple times. */
static long limm;
+
+/* Insertion functions. */
/* Called by the assembler before parsing an instruction. */
@@ -806,10 +840,16 @@ insert_shimmfinish (insn, operand, mods, reg, value, errmsg)
}
/* Called at the end of processing normal insns (eg: add) to insert a limm
- value (if present) into the insn. Actually, there's nothing for us to do
- as we can't call frag_more, the caller must do that. */
-/* ??? The extract fns take a pointer to two words. The insert insns could be
- converted and then we could do something useful. Not sure it's worth it. */
+ value (if present) into the insn.
+
+ Note that this function is only intended to handle instructions (with 4 byte
+ immediate operands). It is not intended to handle data. */
+
+/* ??? Actually, there's nothing for us to do as we can't call frag_more, the
+ caller must do that. The extract fns take a pointer to two words. The
+ insert fns could be converted and then we could do something useful, but
+ then the reloc handlers would have to know to work on the second word of
+ a 2 word quantity. That's too much so we don't handle them. */
static arc_insn
insert_limmfinish (insn, operand, mods, reg, value, errmsg)
@@ -821,7 +861,8 @@ insert_limmfinish (insn, operand, mods, reg, value, errmsg)
const char **errmsg;
{
if (limm_p)
- ; /* nothing to do */
+ /* FIXME: put an abort here and see what happens. */
+ ; /* nothing to do, gas does it */
return insn;
}
@@ -856,6 +897,32 @@ insert_reladdr (insn, operand, mods, reg, value, errmsg)
insn |= ((value >> 2) & ((1 << operand->bits) - 1)) << operand->shift;
return insn;
}
+
+/* Insert a limm value as a 26 bit address right shifted 2 into the insn.
+
+ Note that this function is only intended to handle instructions (with 4 byte
+ immediate operands). It is not intended to handle data. */
+
+/* ??? Actually, there's nothing for us to do as we can't call frag_more, the
+ caller must do that. The extract fns take a pointer to two words. The
+ insert fns could be converted and then we could do something useful, but
+ then the reloc handlers would have to know to work on the second word of
+ a 2 word quantity. That's too much so we don't handle them. */
+
+static arc_insn
+insert_absaddr (insn, operand, mods, reg, value, errmsg)
+ arc_insn insn;
+ const struct arc_operand *operand;
+ int mods;
+ const struct arc_operand_value *reg;
+ long value;
+ const char **errmsg;
+{
+ if (limm_p)
+ /* FIXME: put an abort here and see what happens. */
+ ; /* nothing to do */
+ return insn;
+}
/* Extraction functions.
@@ -1000,8 +1067,8 @@ extract_cond (insn, operand, mods, opval, invalid)
cond = (insn[0] >> operand->shift) & ((1 << operand->bits) - 1);
val = arc_opcode_lookup_suffix (operand, cond);
- /* Ignore NULL values of `val'. Several condition code values aren't
- implemented yet. */
+ /* Ignore NULL values of `val'. Several condition code values are
+ reserved for extensions. */
if (opval && val)
*opval = val;
return cond;
generated by cgit v1.1 at 2024-11-27 09:31:41 +0000