/* This is the set of options which may be modified by the .set
pseudo-op. We use a struct so that .set push and .set pop are more
- reliable.
-
- FIXME: The CPU specific variables (mips_4010, et. al.) should
- probably be in here as well, and there should probably be some way
- to set them. */
+ reliable. */
struct mips_set_options
{
/* Wether we should mark the file EABI64 or EABI32. */
static int mips_eabi64 = 0;
-/* Whether the 4650 instructions (mad/madu) are permitted. */
-static int mips_4650 = -1;
-
-/* Whether the 4010 instructions are permitted. */
-static int mips_4010 = -1;
-
-/* Whether the 4100 MADD16 and DMADD16 are permitted. */
-static int mips_4100 = -1;
-/* start-sanitize-vr4xxx */
-/* Whether NEC 4121 instructions are permitted. */
-static int mips_4121 = -1;
-
-/* end-sanitize-vr4xxx */
-/* start-sanitize-vr4320 */
-/* Whether NEC vr4320 instructions are permitted. */
-static int mips_4320 = -1;
-
-/* end-sanitize-vr4320 */
-/* start-sanitize-cygnus */
-/* Whether NEC vr5400 instructions are permitted. */
-static int mips_5400 = -1;
+/* Whether the processor uses hardware interlocks to protect
+ reads from the HI and LO registers, and thus does not
+ require nops to be inserted.
-/* end-sanitize-cygnus */
-/* start-sanitize-r5900 */
-/* Whether Toshiba r5900 instructions are permitted. */
-static int mips_5900 = -1;
+ FIXME: GCC makes a distinction between -mcpu=FOO and -mFOO:
+ -mcpu=FOO schedules for FOO, but still produces code that meets the
+ requirements of MIPS ISA I. For example, it won't generate any
+ FOO-specific instructions, and it will still assume that any
+ scheduling hazards described in MIPS ISA I are there, even if FOO
+ has interlocks. -mFOO gives GCC permission to generate code that
+ will only run on a FOO; it will generate FOO-specific instructions,
+ and assume interlocks provided by a FOO.
-/* end-sanitize-r5900 */
-/* Whether Toshiba r3900 instructions are permitted. */
-static int mips_3900 = -1;
+ However, GAS currently doesn't make this distinction; before Jan 28
+ 1999, GAS's -mcpu=FOO implied -mFOO, which violates GCC's
+ assumptions. The GCC driver passes these flags through to GAS, so
+ if GAS actually does anything that doesn't meet MIPS ISA I with
+ -mFOO, then GCC's -mcpu=FOO flag isn't going to work.
-/* start-sanitize-tx49 */
-/* Whether Toshiba r4900 instructions are permitted. */
-static int mips_4900 = -1;
+ And furthermore, it did not assume that -mFOO implied -mcpu=FOO,
+ which seems senseless --- why generate code which will only run on
+ a FOO, but schedule for something else?
-/* end-sanitize-tx49 */
-/* start-sanitize-tx19 */
-/* The tx19 (r1900) is a mips16 decoder with a tx39(r3900) behind it.
- The tx19 related options and configuration bits are handled by
- the tx39 flags. */
-/* end-sanitize-tx19 */
+ So now, at least, -mcpu=FOO and -mFOO are exactly equivalent.
-/* Whether the processor uses hardware interlocks to protect
- reads from the HI and LO registers, and thus does not
- require nops to be inserted.
+ -- Jim Blandy <jimb@cygnus.com> */
- FIXME: We really should not be checking mips_cpu here. The -mcpu=
- option is documented to not do anything special. In gcc, the
- -mcpu= option only affects scheduling, and does not affect code
- generation. Each test of -mcpu= here should actually be testing a
- specific variable, such as mips_4010, and each such variable should
- have a command line option to set it. The -mcpu= option may be
- used to set the default value of these options, as is the case for
- mips_4010. */
-
-#define hilo_interlocks (mips_4010 \
+#define hilo_interlocks (mips_cpu == 4010 \
/* start-sanitize-tx49 */ \
- || mips_cpu == 4900 || mips_4900 \
+ || mips_cpu == 4900 \
/* end-sanitize-tx49 */ \
/* start-sanitize-vr4320 */ \
|| mips_cpu == 4320 \
/* end-sanitize-vr4320 */ \
/* start-sanitize-r5900 */ \
- || mips_5900 \
+ || mips_cpu == 5900 \
/* end-sanitize-r5900 */ \
)
#define gpr_interlocks \
(mips_opts.isa >= 2 \
/* start-sanitize-cygnus */ \
- || mips_5400 \
+ || mips_cpu == 5400 \
/* end-sanitize-cygnus */ \
/* start-sanitize-r5900 */ \
- || mips_5900 \
+ || mips_cpu == 5900 \
/* end-sanitize-r5900 */ \
- || mips_3900)
+ || mips_cpu == 3900)
/* As with other "interlocks" this is used by hardware that has FP
(co-processor) interlocks. */
mips_opts.mips16 = 0;
}
- if (mips_4650 < 0)
- mips_4650 = (mips_cpu == 4650);
-
- if (mips_4010 < 0)
- mips_4010 = (mips_cpu == 4010);
-
- if (mips_4100 < 0)
- mips_4100 = (mips_cpu == 4100
- /* start-sanitize-vr4xxx */
- || mips_cpu == 4111
- /* end-sanitize-vr4xxx */
- );
-
- /* start-sanitize-vr4xxx */
- if (mips_4121 < 0)
- mips_4121 = (mips_cpu == 4121);
-
- /* end-sanitize-vr4xxx */
- /* start-sanitize-vr4320 */
- if (mips_4320 < 0)
- mips_4320 = (mips_cpu == 4320);
-
- /* end-sanitize-vr4320 */
- /* start-sanitize-cygnus */
- if (mips_5400 < 0)
- mips_5400 = (mips_cpu == 5400);
- /* end-sanitize-cygnus */
-
- /* start-sanitize-r5900 */
- if (mips_5900 < 0)
- mips_5900 = (mips_cpu == 5900);
- /* end-sanitize-r5900 */
-
- if (mips_3900 < 0)
- mips_3900 = (mips_cpu == 3900);
-
- /* start-sanitize-tx49 */
- if (mips_4900 < 0)
- mips_4900 = (mips_cpu == 4900);
-
- /* end-sanitize-tx49 */
-
/* End of TARGET_CPU processing, get rid of malloced memory
if necessary. */
cpu = NULL;
though the tx39's divide insns still do require the
delay. */
if (! (hilo_interlocks
- || (mips_3900 && (pinfo & INSN_MULT)))
+ || (mips_cpu == 3900 && (pinfo & INSN_MULT)))
&& (mips_optimize == 0
|| (pinfo & INSN_WRITE_LO)))
nops += 2;
insert a NOP. Some newer processors have interlocks.
Also the note tx39's multiply above. */
if (! (hilo_interlocks
- || (mips_3900 && (pinfo & INSN_MULT)))
+ || (mips_cpu == 3900 && (pinfo & INSN_MULT)))
&& (mips_optimize == 0
|| (pinfo & INSN_WRITE_HI)))
nops += 2;
|| ((prev_prev_insn.insn_mo->pinfo & INSN_READ_LO)
&& (pinfo & INSN_WRITE_LO)
&& ! (hilo_interlocks
- || (mips_3900 && (pinfo & INSN_MULT))))
+ || (mips_cpu == 3900 && (pinfo & INSN_MULT))))
|| ((prev_prev_insn.insn_mo->pinfo & INSN_READ_HI)
&& (pinfo & INSN_WRITE_HI)
&& ! (hilo_interlocks
- || (mips_3900 && (pinfo & INSN_MULT)))))
+ || (mips_cpu == 3900 && (pinfo & INSN_MULT)))))
prev_prev_nop = 1;
else
prev_prev_nop = 0;
& (INSN_LOAD_COPROC_DELAY
| INSN_COPROC_MOVE_DELAY
| INSN_WRITE_COND_CODE)))
- || (! (hilo_interlocks || (mips_3900 && (pinfo & INSN_MULT)))
+ || (! (hilo_interlocks
+ || (mips_cpu == 3900 && (pinfo & INSN_MULT)))
&& (prev_pinfo
& (INSN_READ_LO
| INSN_READ_HI)))
if (strcmp (fmt, insn.insn_mo->args) == 0
&& insn.insn_mo->pinfo != INSN_MACRO
&& (insn_isa <= mips_opts.isa
- || (mips_4650
+ || (mips_cpu == 4650
&& (insn.insn_mo->membership & INSN_4650) != 0)
- || (mips_4010
+ || (mips_cpu == 4010
&& (insn.insn_mo->membership & INSN_4010) != 0)
- || (mips_4100
+ || ((mips_cpu == 4100
+ /* start-sanitize-vr4xxx */
+ || mips_cpu == 4111
+ /* end-sanitize-vr4xxx */
+ )
&& (insn.insn_mo->membership & INSN_4100) != 0)
/* start-sanitize-vr4xxx */
- || (mips_4121
+ || (mips_cpu == 4121
&& (insn.insn_mo->membership & INSN_4121) != 0)
/* end-sanitize-vr4xxx */
/* start-sanitize-vr4320 */
- || (mips_4320
+ || (mips_cpu == 4320
&& (insn.insn_mo->membership & INSN_4320) != 0)
/* end-sanitize-vr4320 */
/* start-sanitize-tx49 */
- || (mips_4900
+ || (mips_cpu == 4900
&& (insn.insn_mo->membership & INSN_4900) != 0)
/* end-sanitize-tx49 */
/* start-sanitize-r5900 */
- || (mips_5900
+ || (mips_cpu == 5900
&& (insn.insn_mo->membership & INSN_5900) != 0)
/* end-sanitize-r5900 */
/* start-sanitize-cygnus */
- || (mips_5400
+ || (mips_cpu == 5400
&& (insn.insn_mo->membership & INSN_5400) != 0)
/* end-sanitize-cygnus */
- || (mips_3900
+ || (mips_cpu == 3900
&& (insn.insn_mo->membership & INSN_3900) != 0))
/* start-sanitize-r5900 */
- && (! mips_5900 || (insn.insn_mo->pinfo & FP_D) == 0)
+ && (mips_cpu != 5900 || (insn.insn_mo->pinfo & FP_D) == 0)
/* end-sanitize-r5900 */
- && (! mips_4650 || (insn.insn_mo->pinfo & FP_D) == 0))
+ && (mips_cpu != 4650 || (insn.insn_mo->pinfo & FP_D) == 0))
break;
++insn.insn_mo;
macro_build ((char *) NULL, &icnt, NULL, "teq", "s,t", 0, 0);
else
/* start-sanitize-r5900 */
- if (mips_5900)
+ if (mips_cpu == 5900)
macro_build ((char *) NULL, &icnt, NULL, "break", "B", 7);
else
/* end-sanitize-r5900 */
dbl ? "ddiv" : "div",
"z,s,t", sreg, treg);
/* start-sanitize-r5900 */
- if (mips_5900)
+ if (mips_cpu == 5900)
macro_build ((char *) NULL, &icnt, NULL, "break", "B", 7);
else
/* end-sanitize-r5900 */
--mips_opts.noreorder;
/* start-sanitize-r5900 */
- if (mips_5900)
+ if (mips_cpu == 5900)
macro_build ((char *) NULL, &icnt, NULL, "break", "B", 6);
else
/* end-sanitize-r5900 */
macro_build ((char *) NULL, &icnt, NULL, "teq", "s,t", 0, 0);
else
/* start-sanitize-r5900 */
- if (mips_5900)
+ if (mips_cpu == 5900)
macro_build ((char *) NULL, &icnt, NULL, "break", "B", 7);
else
/* end-sanitize-r5900 */
that later insns are available for delay slot filling. */
--mips_opts.noreorder;
/* start-sanitize-r5900 */
- if (mips_5900)
+ if (mips_cpu == 5900)
macro_build ((char *) NULL, &icnt, NULL, "break", "B", 7);
else
/* end-sanitize-r5900 */
lr = 1;
goto ld;
case M_LDC1_AB:
- if (mips_4650)
+ if (mips_cpu == 4650)
{
as_bad (_("opcode not supported on this processor"));
return;
s = "scd";
goto st;
case M_SDC1_AB:
- if (mips_4650)
+ if (mips_cpu == 4650)
{
as_bad (_("opcode not supported on this processor"));
return;
}
case M_L_DOB:
- if (mips_4650)
+ if (mips_cpu == 4650)
{
as_bad (_("opcode not supported on this processor"));
return;
* But, the resulting address is the same after relocation so why
* generate the extra instruction?
*/
- if (mips_4650)
+ if (mips_cpu == 4650)
{
as_bad (_("opcode not supported on this processor"));
return;
goto ldd_std;
case M_S_DAB:
- if (mips_4650)
+ if (mips_cpu == 4650)
{
as_bad (_("opcode not supported on this processor"));
return;
macro_build ((char *) NULL, &icnt, &expr1, "beq", "s,t,p", dreg, AT);
macro_build ((char *) NULL, &icnt, NULL, "nop", "", 0);
/* start-sanitize-r5900 */
- if (mips_5900)
+ if (mips_cpu == 5900)
macro_build ((char *) NULL, &icnt, NULL, "break", "B", 6);
else
/* end-sanitize-r5900 */
macro_build ((char *) NULL, &icnt, &expr1, "beq", "s,t,p", AT, 0);
macro_build ((char *) NULL, &icnt, NULL, "nop", "", 0);
/* start-sanitize-r5900 */
- if (mips_5900)
+ if (mips_cpu == 5900)
macro_build ((char *) NULL, &icnt, NULL, "break", "B", 6);
else
/* end-sanitize-r5900 */
break;
case M_S_DOB:
- if (mips_4650)
+ if (mips_cpu == 4650)
{
as_bad (_("opcode not supported on this processor"));
return;
expr1.X_add_number = 2;
macro_build ((char *) NULL, &icnt, &expr1, "bnez", "x,p", yreg);
/* start-sanitize-r5900 */
- if (mips_5900)
+ if (mips_cpu == 5900)
macro_build ((char *) NULL, &icnt, NULL, "break", "B", 7);
else
/* end-sanitize-r5900 */
expr1.X_add_number = 2;
macro_build ((char *) NULL, &icnt, &expr1, "bnez", "x,p", yreg);
/* start-sanitize-r5900 */
- if (mips_5900)
+ if (mips_cpu == 5900)
macro_build ((char *) NULL, &icnt, NULL, "break", "B", 7);
else
/* end-sanitize-r5900 */
ok = true;
else if (insn->pinfo == INSN_MACRO)
ok = false;
- else if ((mips_4650 && (insn->membership & INSN_4650) != 0)
- || (mips_4010 && (insn->membership & INSN_4010) != 0)
- || (mips_4100 && (insn->membership & INSN_4100) != 0)
+ else if ((mips_cpu == 4650 && (insn->membership & INSN_4650) != 0)
+ || (mips_cpu == 4010 && (insn->membership & INSN_4010) != 0)
+ || ((mips_cpu == 4100
+ /* start-sanitize-vr4xxx */
+ || mips_cpu == 4111
+ /* end-sanitize-vr4xxx */
+ )
+ && (insn->membership & INSN_4100) != 0)
/* start-sanitize-vr4xxx */
- || (mips_4121 && (insn->membership & INSN_4121) != 0)
+ || (mips_cpu == 4121 && (insn->membership & INSN_4121) != 0)
/* end-sanitize-vr4xxx */
/* start-sanitize-vr4320 */
- || (mips_4320 && (insn->membership & INSN_4320) != 0)
+ || (mips_cpu == 4320 && (insn->membership & INSN_4320) != 0)
/* end-sanitize-vr4320 */
/* start-sanitize-tx49 */
- || (mips_4900 && (insn->membership & INSN_4900) != 0)
+ || (mips_cpu == 4900 && (insn->membership & INSN_4900) != 0)
/* end-sanitize-tx49 */
/* start-sanitize-r5900 */
- || (mips_5900 && (insn->membership & INSN_5900) != 0)
+ || (mips_cpu == 5900 && (insn->membership & INSN_5900) != 0)
/* end-sanitize-r5900 */
/* start-sanitize-cygnus */
- || (mips_5400 && (insn->membership & INSN_5400) != 0)
+ || (mips_cpu == 5400 && (insn->membership & INSN_5400) != 0)
/* end-sanitize-cygnus */
- || (mips_3900 && (insn->membership & INSN_3900) != 0))
+ || (mips_cpu == 3900 && (insn->membership & INSN_3900) != 0))
ok = true;
else
ok = false;
if (insn->pinfo != INSN_MACRO)
{
- if (mips_4650 && (insn->pinfo & FP_D) != 0)
+ if (mips_cpu == 4650 && (insn->pinfo & FP_D) != 0)
ok = false;
/* start-sanitize-r5900 */
- if (mips_5900 && (insn->pinfo & FP_D) != 0)
+ if (mips_cpu == 5900 && (insn->pinfo & FP_D) != 0)
ok = false;
/* end-sanitize-r5900 */
}
{
/* start-sanitize-r5900 */
/* Allow "$viNN" as coprocessor register name */
- if (mips_5900
+ if (mips_cpu == 5900
&& *args == 'G'
&& s[1] == 'v'
&& s[2] == 'i')
break;
case OPTION_M4650:
- mips_4650 = 1;
+ mips_cpu = 4650;
break;
case OPTION_NO_M4650:
- mips_4650 = 0;
break;
case OPTION_M4010:
- mips_4010 = 1;
+ mips_cpu = 4010;
break;
case OPTION_NO_M4010:
- mips_4010 = 0;
break;
case OPTION_M4100:
- mips_4100 = 1;
+ mips_cpu = 4100;
break;
case OPTION_NO_M4100:
- mips_4100 = 0;
break;
/* start-sanitize-vr4xxx */
case OPTION_M4121:
- mips_4121 = 1;
+ mips_cpu = 4121;
break;
case OPTION_NO_M4121:
- mips_4121 = 0;
break;
/* end-sanitize-vr4xxx */
/* start-sanitize-r5900 */
case OPTION_M5900:
- mips_5900 = 1;
+ mips_cpu = 5900;
break;
case OPTION_NO_M5900:
- mips_5900 = 0;
break;
/* end-sanitize-r5900 */
/* start-sanitize-vr4320 */
case OPTION_M4320:
- mips_4320 = 1;
+ mips_cpu = 4320;
break;
case OPTION_NO_M4320:
- mips_4320 = 0;
break;
/* end-sanitize-vr4320 */
/* start-sanitize-cygnus */
case OPTION_M5400:
- mips_5400 = 1;
+ mips_cpu = 5400;
break;
case OPTION_NO_M5400:
- mips_5400 = 0;
break;
/* end-sanitize-cygnus */
case OPTION_M3900:
- mips_3900 = 1;
+ mips_cpu = 3900;
break;
case OPTION_NO_M3900:
- mips_3900 = 0;
break;
/* start-sanitize-tx49 */
case OPTION_M4900:
- mips_4900 = 1;
+ mips_cpu = 4900;
break;
case OPTION_NO_M4900:
- mips_4900 = 0;
break;
/* end-sanitize-tx49 */
return 1;
}
+
+static void
+show (stream, string, col_p, first_p)
+ FILE *stream;
+ char *string;
+ int *col_p;
+ int *first_p;
+{
+ if (*first_p)
+ {
+ fprintf (stream, "%24s", "");
+ *col_p = 24;
+ }
+ else
+ {
+ fprintf (stream, ", ");
+ *col_p += 2;
+ }
+
+ if (*col_p + strlen (string) > 72)
+ {
+ fprintf (stream, "\n%24s", "");
+ *col_p = 24;
+ }
+
+ fprintf (stream, "%s", string);
+ *col_p += strlen (string);
+
+ *first_p = 0;
+}
+
+
void
md_show_usage (stream)
FILE *stream;
{
+ int column, first;
+
fprintf(stream, _("\
MIPS options:\n\
-membedded-pic generate embedded position independent code\n\
-mips2 generate MIPS ISA II instructions\n\
-mips3 generate MIPS ISA III instructions\n\
-mips4 generate MIPS ISA IV instructions\n\
--mcpu=vr4300 generate code for vr4300\n\
--mcpu=vr4100 generate code for vr4100\n\
--m4650 permit R4650 instructions\n\
--no-m4650 do not permit R4650 instructions\n\
--m4010 permit R4010 instructions\n\
--no-m4010 do not permit R4010 instructions\n\
--m4100 permit VR4100 instructions\n\
--no-m4100 do not permit VR4100 instructions\n"));
+-mcpu=CPU generate code for CPU, where CPU is one of:\n"));
+
+ first = 1;
+
+ /* start-sanitize-tx19 */
+ show (stream, "1900", &column, &first);
+ /* end-sanitize-tx19 */
+ show (stream, "2000", &column, &first);
+ show (stream, "3000", &column, &first);
+ show (stream, "3900", &column, &first);
+ show (stream, "4000", &column, &first);
+ show (stream, "4010", &column, &first);
+ show (stream, "4100", &column, &first);
/* start-sanitize-vr4xxx */
- fprintf(stream, _("\
--mcpu=vr4111 generate code for vr4111\n"));
- fprintf(stream, _("\
--mcpu=vr4121 generate code for vr4121\n\
--m4121 permit VR4121 instructions\n\
--no-m4121 do not permit VR4121 instructions\n"));
+ show (stream, "4111", &column, &first);
+ show (stream, "4121", &column, &first);
/* end-sanitize-vr4xxx */
+ show (stream, "4300", &column, &first);
+ /* start-sanitize-vr4320 */
+ show (stream, "4320", &column, &first);
+ /* end-sanitize-vr4320 */
+ show (stream, "4400", &column, &first);
+ show (stream, "4600", &column, &first);
+ show (stream, "4650", &column, &first);
+ /* start-sanitize-tx49 */
+ show (stream, "4900", &column, &first);
+ /* end-sanitize-tx49 */
+ show (stream, "5000", &column, &first);
+ /* start-sanitize-cygnus */
+ show (stream, "5400", &column, &first);
+ /* end-sanitize-cygnus */
+ /* start-sanitize-r5900 */
+ show (stream, "5900", &column, &first);
+ /* end-sanitize-r5900 */
+ show (stream, "6000", &column, &first);
+ show (stream, "8000", &column, &first);
+ show (stream, "10000", &column, &first);
+ fputc ('\n', stream);
+
+ fprintf (stream, _("\
+-mCPU equivalent to -mcpu=CPU.\n\
+-no-mCPU don't generate code for CPU.\n\
+ For -mCPU and -no-mCPU, CPU must be one of:\n"));
+
+ first = 1;
+
+ /* start-sanitize-tx19 */
+ show (stream, "1900", &column, &first);
+ /* end-sanitize-tx19 */
+ show (stream, "3900", &column, &first);
+ show (stream, "4010", &column, &first);
+ show (stream, "4100", &column, &first);
+ /* start-sanitize-vr4xxx */
+ show (stream, "4121", &column, &first);
+ /* end-sanitize-vr4xxx */
+ /* start-sanitize-vr4320 */
+ show (stream, "4320", &column, &first);
+ /* end-sanitize-vr4320 */
+ show (stream, "4650", &column, &first);
+ /* start-sanitize-tx49 */
+ show (stream, "4900", &column, &first);
+ /* end-sanitize-tx49 */
+ /* start-sanitize-cygnus */
+ show (stream, "5400", &column, &first);
+ /* end-sanitize-cygnus */
+ /* start-sanitize-r5900 */
+ show (stream, "5900", &column, &first);
+ /* end-sanitize-r5900 */
+ fputc ('\n', stream);
+
fprintf(stream, _("\
-mips16 generate mips16 instructions\n\
-no-mips16 do not generate mips16 instructions\n"));
if (f != NULL)
break;
+#if 0 /* GCC code motion plus incomplete dead code elimination
+ can leave a %hi without a %lo. */
if (pass == 1)
as_warn_where (l->fixp->fx_file, l->fixp->fx_line,
_("Unmatched %%hi reloc"));
+#endif
}
}
}
projects / binutils-gdb.git / commitdiff