diff options
Diffstat (limited to 'gas/config/tc-mips.c')
| -rw-r--r-- | gas/config/tc-mips.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c index a2e1afe..26b12e3 100644 --- a/gas/config/tc-mips.c +++ b/gas/config/tc-mips.c @@ -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 |