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* config/tc-mips.c (append_insn): For mips16, insert a nop between 

a read of HI or LO and an immediatly following branch.
This commit is contained in:
Gavin Romig-Koch 1998-12-29 15:46:59 +00:00
parent ffa3e1860a
commit 2e23624e62
2 changed files with 25 additions and 0 deletions
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5
gas/ChangeLog
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@ -1,3 +1,8 @@
1998-12-29 Gavin Romig-Koch <gavin@cygnus.com>
* config/tc-mips.c (append_insn): For mips16, insert a nop between
a read of HI or LO and an immediatly following branch.
1998-12-29 Gavin Romig-Koch <gavin@cygnus.com>
* config/tc-mips.c (md_begin): Another correction to the setting of

20
gas/config/tc-mips.c
View File

@ -1689,6 +1689,16 @@ append_insn (place, ip, address_expr, reloc_type, unmatched_hi)
&& (mips_optimize == 0
|| (pinfo & INSN_WRITE_LO)))
nops += 2;
/* Most mips16 branch insns don't have a delay slot.
If a read from LO is immediately followed by a branch
to a write to LO we have a read followed by a write
less than 2 insns away. We assume the target of
a branch might be a write to LO, and insert a nop
between a read and an immediately following branch. */
else if (mips_opts.mips16
&& (mips_optimize == 0
|| (pinfo & MIPS16_INSN_BRANCH)))
nops += 1;
}
else if (prev_insn.insn_mo->pinfo & INSN_READ_HI)
{
@ -1701,6 +1711,16 @@ append_insn (place, ip, address_expr, reloc_type, unmatched_hi)
&& (mips_optimize == 0
|| (pinfo & INSN_WRITE_HI)))
nops += 2;
/* Most mips16 branch insns don't have a delay slot.
If a read from HI is immediately followed by a branch
to a write to HI we have a read followed by a write
less than 2 insns away. We assume the target of
a branch might be a write to HI, and insert a nop
between a read and an immediately following branch. */
else if (mips_opts.mips16
&& (mips_optimize == 0
|| (pinfo & MIPS16_INSN_BRANCH)))
nops += 1;
}
/* If the previous instruction was in a noreorder section, then