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* config/tc-mn10200.c (md_relax_table): Add entries to allow 

jmp -> bra relaxing.
        (md_convert_frag): Handle jmp->bra relaxing.
        (md_assemble): Handle jmp->bra relaxing.
        (md_estimate_size_before_relax): Likewise.
This commit is contained in:
Jeff Law 1997-01-31 22:23:10 +00:00
parent 05a2139023
commit f5d7f6fb53
2 changed files with 64 additions and 20 deletions
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8
gas/ChangeLog
View File

@ -1,3 +1,11 @@
Fri Jan 31 15:21:02 1997 Jeffrey A Law (law@cygnus.com)
* config/tc-mn10200.c (md_relax_table): Add entries to allow
jmp -> bra relaxing.
(md_convert_frag): Handle jmp->bra relaxing.
(md_assemble): Handle jmp->bra relaxing.
(md_estimate_size_before_relax): Likewise.
Fri Jan 31 13:15:05 1997 Alan Modra <alan@spri.levels.unisa.edu.au>
* config/tc-i386.c (i386_align_code): Add comments explaining the

76
gas/config/tc-mn10200.c
View File

@ -62,9 +62,13 @@ const relax_typeS md_relax_table[] = {
{0x7f, -0x80, 3, 4},
{0x7fff, -0x8000, 6, 5},
{0x7fffff, -0x8000000, 8, 0},
/* jmp/jsr relaxing, could have a bra variant too! */
/* jsr relaxing */
{0x7fff, -0x8000, 3, 7},
{0x7fffff, -0x8000000, 5, 0},
/* jmp relaxing */
{0x7f, -0x80, 2, 9},
{0x7fff, -0x8000, 3, 10},
{0x7fffff, -0x8000000, 5, 0},
};
/* local functions */
@ -667,20 +671,37 @@ md_convert_frag (abfd, sec, fragP)
else if (fragP->fr_subtype == 7)
{
int offset = fragP->fr_fix;
int opcode = fragP->fr_literal[offset] & 0xff;
fragP->fr_literal[offset] = 0xf4;
fragP->fr_literal[offset + 1] = 0xe1;
if (opcode == 0xfc)
{
fragP->fr_literal[offset] = 0xf4;
fragP->fr_literal[offset + 1] = 0xe0;
}
else if (opcode == 0xfd)
{
fragP->fr_literal[offset] = 0xf4;
fragP->fr_literal[offset + 1] = 0xe1;
}
else
abort ();
fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol,
fragP->fr_offset + 2, 1, BFD_RELOC_24_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 5;
}
else if (fragP->fr_subtype == 8)
{
fragP->fr_literal[fragP->fr_fix] = 0xea;
fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol,
fragP->fr_offset + 1, 1, BFD_RELOC_8_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 2;
}
else if (fragP->fr_subtype == 9)
{
int offset = fragP->fr_fix;
fragP->fr_literal[offset] = 0xfc;
fix_new (fragP, fragP->fr_fix + 1, 4, fragP->fr_symbol,
fragP->fr_offset + 1, 1, BFD_RELOC_16_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 3;
}
else if (fragP->fr_subtype == 10)
{
int offset = fragP->fr_fix;
fragP->fr_literal[offset] = 0xf4;
fragP->fr_literal[offset + 1] = 0xe0;
fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol,
fragP->fr_offset + 2, 1, BFD_RELOC_24_PCREL);
@ -1019,13 +1040,19 @@ keep_going:
{
int type;
if (size == 2)
/* bCC */
if (size == 2 && opcode->opcode != 0xfc0000)
type = 0;
else if (size == 3
&& opcode->opcode != 0xfd0000 && opcode->opcode != 0xfc0000)
type = 3;
else
/* jsr */
else if (size == 3 && opcode->opcode == 0xfd0000)
type = 6;
/* jmp */
else if (size == 3 && opcode->opcode == 0xfc0000)
type = 8;
/* bCCx */
else
type = 3;
f = frag_var (rs_machine_dependent, 8, 8 - size, type,
fixups[0].exp.X_add_symbol,
fixups[0].exp.X_add_number,
@ -1208,8 +1235,17 @@ md_estimate_size_before_relax (fragp, seg)
fragp->fr_subtype = 7;
return 5;
}
return 3;
}
if (fragp->fr_subtype == 8)
{
if (!S_IS_DEFINED (fragp->fr_symbol))
{
fragp->fr_subtype = 10;
return 5;
}
return 2;
}
return 3;
}
long