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2009-05-26 Catherine Moore <clm@codesourcery.com>

Browse Source 
gas/
            * config/tc-mips.c (check_for_24k_errata): Remove.
            (md_mips_end): Remove call to check_for_24k_errata.
            (start_noreorder): Likewise.
            (s_change_sec): Likewise.
            (s_change_section): Likewise.
            (insns_between): Add 24k errata checks.
            (append_insn): Remove declaration and references to nhdx_24k.
            Remove calls to check_for_24k_errata.

            gas/testsuite:
            * eret.s, eret.d eret.l: Remove.
            * eret-1.s, eret-1.d: New.
            * eret-2.s, eret-2.d: New.
            * eret-3.s, eret-3.d: New.
            * mips.exp: Run new tests.  Remove old tests.
This commit is contained in:
Catherine Moore 2009-05-27 14:14:42 +00:00
parent 3614867c42
commit ff2390383b
11 changed files with 106 additions and 110 deletions
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11
gas/ChangeLog
View File

@ -1,3 +1,14 @@
2009-05-26 Catherine Moore <clm@codesourcery.com>
* config/tc-mips.c (check_for_24k_errata): Remove.
(md_mips_end): Remove call to check_for_24k_errata.
(start_noreorder): Likewise.
(s_change_sec): Likewise.
(s_change_section): Likewise.
(insns_between): Add 24k errata checks.
(append_insn): Remove declaration and references to nhdx_24k.
Remove calls to check_for_24k_errata.
2009-05-26 Nick Clifton <nickc@redhat.com>
* po/id.po: Updated Indonesian translation.

125
gas/config/tc-mips.c
View File

@ -1792,85 +1792,6 @@ reg_lookup (char **s, unsigned int types, unsigned int *regnop)
return reg >= 0;
}
#define INSN_ERET 0x42000018
#define INSN_DERET 0x4200001f
/* Implement the ERET/DERET Errata for MIPS 24k.
If an ERET/DERET is encountered in a noreorder block,
warn if the ERET/DERET is followed by a branch instruction.
Also warn if the ERET/DERET is the last instruction in the
noreorder block.
IF an ERET/DERET is in a reorder block and is followed by a
branch instruction, insert a nop. */
static void
check_for_24k_errata (struct mips_cl_insn *insn, int eret_ndx)
{
bfd_boolean next_insn_is_branch = FALSE;
/* eret_ndx will be -1 for the last instruction in a section
and the ERET/DERET will be in insn, not history. */
if (insn
&& eret_ndx == -1
&& (insn->insn_opcode == INSN_ERET
|| insn->insn_opcode == INSN_DERET)
&& insn->noreorder_p)
{
as_warn (_("ERET and DERET must be followed by a NOP on the 24K."));
return;
}
if (history[eret_ndx].insn_opcode != INSN_ERET
&& history[eret_ndx].insn_opcode != INSN_DERET)
return;
if (!insn)
{
if (history[eret_ndx].noreorder_p)
as_warn (_("ERET and DERET must be followed by a NOP on the 24K."));
return;
}
next_insn_is_branch = ((insn->insn_opcode == INSN_ERET)
|| (insn->insn_opcode == INSN_DERET)
|| (insn->insn_mo->pinfo
& (INSN_UNCOND_BRANCH_DELAY
| INSN_COND_BRANCH_DELAY
| INSN_COND_BRANCH_LIKELY)));
if (next_insn_is_branch && history[eret_ndx].noreorder_p)
{
as_warn (_("ERET and DERET must be followed by a NOP on the 24K."));
return;
}
/* Emit nop if the next instruction is a branch. */
if (next_insn_is_branch)
{
long nop_where, br_where;
struct frag *nop_frag, *br_frag;
struct mips_cl_insn br_insn, nop_insn;
emit_nop ();
nop_insn = history[eret_ndx - 1];
nop_frag = history[eret_ndx - 1].frag;
nop_where = history[eret_ndx - 1].where;
br_insn = history[eret_ndx];
br_frag = history[eret_ndx].frag;
br_where = history[eret_ndx].where;
move_insn (&nop_insn, br_frag, br_where);
move_insn (&br_insn, nop_frag, nop_where);
history[eret_ndx-1] = br_insn;
history[eret_ndx] = nop_insn;
}
}
/* Return TRUE if opcode MO is valid on the currently selected ISA and
architecture. If EXPANSIONP is TRUE then this check is done while
expanding a macro. Use is_opcode_valid_16 for MIPS16 opcodes. */
@ -2156,9 +2077,6 @@ md_begin (void)
void
md_mips_end (void)
{
if (mips_fix_24k)
check_for_24k_errata ((struct mips_cl_insn *) &history[0], -1);
if (! ECOFF_DEBUGGING)
md_obj_end ();
}
@ -2536,6 +2454,9 @@ classify_vr4120_insn (const char *name)
return NUM_FIX_VR4120_CLASSES;
}
#define INSN_ERET 0x42000018
#define INSN_DERET 0x4200001f
/* Return the number of instructions that must separate INSN1 and INSN2,
where INSN1 is the earlier instruction. Return the worst-case value
for any INSN2 if INSN2 is null. */
@ -2573,6 +2494,24 @@ insns_between (const struct mips_cl_insn *insn1,
&& INSN2_USES_REG (EXTRACT_OPERAND (RD, *insn1), MIPS_GR_REG))
return 2;
/* If we're working around 24K errata, one instruction is required
if an ERET or DERET is followed by a branch instruction. */
if (mips_fix_24k)
{
if (insn1->insn_opcode == INSN_ERET
|| insn1->insn_opcode == INSN_DERET)
{
if (insn2 == NULL
|| insn2->insn_opcode == INSN_ERET
|| insn2->insn_opcode == INSN_DERET
|| (insn2->insn_mo->pinfo
& (INSN_UNCOND_BRANCH_DELAY
| INSN_COND_BRANCH_DELAY
| INSN_COND_BRANCH_LIKELY)) != 0)
return 1;
}
}
/* If working around VR4120 errata, check for combinations that need
a single intervening instruction. */
if (mips_fix_vr4120)
@ -2789,7 +2728,6 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr,
bfd_reloc_code_real_type *reloc_type)
{
unsigned long prev_pinfo, pinfo;
int hndx_24k = 0;
relax_stateT prev_insn_frag_type = 0;
bfd_boolean relaxed_branch = FALSE;
segment_info_type *si = seg_info (now_seg);
@ -3347,8 +3285,6 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr,
slot, and bump the destination address. */
insert_into_history (0, 1, ip);
emit_nop ();
if (mips_fix_24k)
hndx_24k++;
}
if (mips_relax.sequence)
@ -3389,11 +3325,6 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr,
insn information. */
if (pinfo & INSN_UNCOND_BRANCH_DELAY)
{
/* Check for eret/deret before clearing history. */
if (mips_fix_24k)
check_for_24k_errata (
(struct mips_cl_insn *) &history[hndx_24k],
hndx_24k+1);
mips_no_prev_insn ();
}
}
@ -3405,8 +3336,6 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr,
the next instruction. */
insert_into_history (0, 1, ip);
emit_nop ();
if (mips_fix_24k)
hndx_24k++;
}
else
insert_into_history (0, 1, ip);
@ -3414,10 +3343,6 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr,
else
insert_into_history (0, 1, ip);
if (mips_fix_24k)
check_for_24k_errata ((struct mips_cl_insn *) &history[hndx_24k],
hndx_24k+1);
/* We just output an insn, so the next one doesn't have a label. */
mips_clear_insn_labels ();
}
@ -3504,8 +3429,6 @@ start_noreorder (void)
static void
end_noreorder (void)
{
if (mips_fix_24k)
check_for_24k_errata (NULL, 0);
mips_opts.noreorder--;
if (mips_opts.noreorder == 0 && prev_nop_frag != NULL)
@ -12588,9 +12511,6 @@ s_change_sec (int sec)
mips_emit_delays ();
if (mips_fix_24k)
check_for_24k_errata ((struct mips_cl_insn *) &history[0], -1);
switch (sec)
{
case 't':
@ -12649,9 +12569,6 @@ s_change_section (int ignore ATTRIBUTE_UNUSED)
if (!IS_ELF)
return;
if (mips_fix_24k)
check_for_24k_errata ((struct mips_cl_insn *) &history[0], -1);
section_name = input_line_pointer;
c = get_symbol_end ();
if (c)

13
gas/testsuite/ChangeLog
View File

@ -1,3 +1,16 @@
2009-05-26 Catherine Moore <clm@codesourcery.com>
* gas/mips/eret.s: Remove.
* gas/mips/ eret.d: Remove.
* gas/mips/eret.l: Remove.
* gas/mips/eret-1.s: New.
* gas/mips/eret-1.d: New.
* gas/mips/eret-2.s: New.
* gas/mips/eret-2.d: New.
* gas/mips/eret-3.s: New.
* gas/mips/eret-3.d: New.
* gas/mips/mips.exp: Run new tests. Remove old tests.
2009-05-23 Richard Sandiford <rdsandiford@googlemail.com>
* gas/mips/vr4130.s, gas/mips/vr4130.d: Expect part A to have nops.

2
gas/testsuite/gas/mips/eret.d → gas/testsuite/gas/mips/eret-1.d
View File

@ -1,5 +1,5 @@
#objdump: -d
#name: MIPS eret disassembly
#name: MIPS eret-1 disassembly
#as: -mfix-24k -march=24kc --no-warn
.*\.o: file format .*mips.*

0
gas/testsuite/gas/mips/eret.s → gas/testsuite/gas/mips/eret-1.s
View File

16
gas/testsuite/gas/mips/eret-2.d Normal file
View File

@ -0,0 +1,16 @@
#objdump: -d
#name: MIPS eret-2 disassembly
#as: -mfix-24k -march=24kc --no-warn
.*\.o: file format .*mips.*
Disassembly of section \.text:
00000000 <\.text>:
0: 42000018 eret
4: 00000000 nop
8: 1000fffd b 0x0
c: 00000000 nop
10: 42000018 eret
14: 00000000 nop
18: 1000fffd b 0x10

9
gas/testsuite/gas/mips/eret-2.s Normal file
View File

@ -0,0 +1,9 @@
.set noreorder
1: eret
.set reorder
b 1b
1: eret
.set noreorder
b 1b
.set reorder

18
gas/testsuite/gas/mips/eret-3.d Normal file
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@ -0,0 +1,18 @@
#objdump: -d
#name: MIPS eret-3 disassembly
#as: -mfix-24k -march=24kc --no-warn
.*\.o: file format .*mips.*
Disassembly of section \.text:
00000000 <foo>:
0: 42000018 eret
4: 00000000 nop
00000008 <bar>:
8: 10800002 beqz a0,14 <bar\+0xc>
c: 00000000 nop
10: aca40000 sw a0,0\(a1\)
14: 03e00008 jr ra
18: 00000000 nop

14
gas/testsuite/gas/mips/eret-3.s Normal file
View File

@ -0,0 +1,14 @@
.globl foo
.ent foo
foo:
eret
.end foo
.globl bar
.ent bar
bar:
beq $4,$0,1f
sw $4,0($5)
1:
jr $31
.end bar

3
gas/testsuite/gas/mips/eret.l
View File

@ -1,3 +0,0 @@
.*\.s: Assembler messages:
.*\.s:20: Warning: ERET and DERET must be followed by a NOP on the 24K\.
.*\.s:27: Warning: ERET and DERET must be followed by a NOP on the 24K\.

5
gas/testsuite/gas/mips/mips.exp
View File

@ -436,8 +436,9 @@ if { [istarget mips*-*-vxworks*] } {
} else {
run_dump_test "jal"
}
run_dump_test "eret"
run_list_test "eret" "-mfix-24k -march=24kc" "MIPS eret warnings"
run_dump_test "eret-1"
run_dump_test "eret-2"
run_dump_test "eret-3"
if $elf { run_dump_test "jal-svr4pic" }
if $elf { run_dump_test "jal-xgot" }