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Use MVN to build simple inverted constants.

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This commit is contained in:
Nick Clifton 2001-06-27 08:15:52 +00:00
parent 1a16aca4b4
commit d827344236
2 changed files with 44 additions and 24 deletions
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5
gas/ChangeLog
View File

@ -1,3 +1,8 @@
2001-06-27 Nick Clifton <nickc@cambridge.redhat.com>
* config/tc-arm.c (do_ldst): Use MVN to build simple inverted
constants.
2001-06-27 Alan Modra <amodra@bigpond.net.au>
* write.c (fixup_segment <Difference of 2 syms same seg>): Don't

63
gas/config/tc-arm.c
View File

@ -4413,38 +4413,53 @@ do_ldst (str, flags)
return;
}
if (inst.reloc.exp.X_op == O_constant
&& (value = validate_immediate (inst.reloc.exp.X_add_number)) != FAIL)
if (inst.reloc.exp.X_op == O_constant)
{
/* This can be done with a mov instruction. */
inst.instruction &= LITERAL_MASK;
inst.instruction |= INST_IMMEDIATE | (OPCODE_MOV << DATA_OP_SHIFT);
inst.instruction |= (flags & COND_MASK) | (value & 0xfff);
end_of_line (str);
return;
}
else
{
/* Insert into literal pool. */
if (add_to_lit_pool () == FAIL)
value = validate_immediate (inst.reloc.exp.X_add_number);
if (value != FAIL)
{
if (!inst.error)
inst.error = _("literal pool insertion failed");
/* This can be done with a mov instruction. */
inst.instruction &= LITERAL_MASK;
inst.instruction |= INST_IMMEDIATE | (OPCODE_MOV << DATA_OP_SHIFT);
inst.instruction |= (flags & COND_MASK) | (value & 0xfff);
end_of_line (str);
return;
}
value = validate_immediate (~ inst.reloc.exp.X_add_number);
/* Change the instruction exp to point to the pool. */
if (halfword)
if (value != FAIL)
{
inst.instruction |= HWOFFSET_IMM;
inst.reloc.type = BFD_RELOC_ARM_HWLITERAL;
/* This can be done with a mvn instruction. */
inst.instruction &= LITERAL_MASK;
inst.instruction |= INST_IMMEDIATE | (OPCODE_MVN << DATA_OP_SHIFT);
inst.instruction |= (flags & COND_MASK) | (value & 0xfff);
end_of_line (str);
return;
}
else
inst.reloc.type = BFD_RELOC_ARM_LITERAL;
inst.reloc.pc_rel = 1;
inst.instruction |= (REG_PC << 16);
pre_inc = 1;
}
/* Insert into literal pool. */
if (add_to_lit_pool () == FAIL)
{
if (!inst.error)
inst.error = _("literal pool insertion failed");
return;
}
/* Change the instruction exp to point to the pool. */
if (halfword)
{
inst.instruction |= HWOFFSET_IMM;
inst.reloc.type = BFD_RELOC_ARM_HWLITERAL;
}
else
inst.reloc.type = BFD_RELOC_ARM_LITERAL;
inst.reloc.pc_rel = 1;
inst.instruction |= (REG_PC << 16);
pre_inc = 1;
}
else
{