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* config/tc-mips.c (append_insn): Don't do branch relaxation for
	MIPS-3D instructions either.
	(md_convert_frag): Update the COPx branch mask accordingly.

	* config/tc-mips.c (md_show_usage): Document --[no-]relax-branch
	option.
	* doc/as.texinfo (Overview): Add --relax-branch and
	--no-relax-branch.
	* doc/c-mips.texi (MIPS Opts): Document --relax-branch and
	--no-relax-branch.

	gas/testsuite/
	* gas/mips/relax-bc1any.l: New test.
	* gas/mips/relax-bc1any.s: New test source.
	* gas/mips/mips.exp: Run the new test.
This commit is contained in:
Maciej W. Rozycki
2013-06-10 18:15:48 +00:00
parent 10bf68945e
commit 3bf0dbfb15
8 changed files with 79 additions and 8 deletions
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17
gas/config/tc-mips.c
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@@ -4394,9 +4394,9 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr,
out that the branch was out-of-range, we'll get an error. */
&& !mips_opts.warn_about_macros
&& (mips_opts.at || mips_pic == NO_PIC)
/* Don't relax BPOSGE32/64 as they have no complementing
branches. */
&& !(ip->insn_mo->ase & (ASE_DSP64 | ASE_DSP)));
/* Don't relax BPOSGE32/64 or BC1ANY2T/F and BC1ANY4T/F
as they have no complementing branches. */
&& !(ip->insn_mo->ase & (ASE_MIPS3D | ASE_DSP64 | ASE_DSP)));
if (!HAVE_CODE_COMPRESSION
&& address_expr
@@ -18177,10 +18177,10 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
switch ((insn >> 28) & 0xf)
{
case 4:
/* bc[0-3][tf]l? and bc1any[24][ft] instructions can
have the condition reversed by tweaking a single
bit, and their opcodes all have 0x4???????. */
gas_assert ((insn & 0xf1000000) == 0x41000000);
/* bc[0-3][tf]l? instructions can have the condition
reversed by tweaking a single TF bit, and their
opcodes all have 0x4???????. */
gas_assert ((insn & 0xf3e00000) == 0x41000000);
insn ^= 0x00010000;
break;
@@ -19725,7 +19725,8 @@ MIPS options:\n\
-msoft-float do not allow floating-point instructions\n\
-msingle-float only allow 32-bit floating-point operations\n\
-mdouble-float allow 32-bit and 64-bit floating-point operations\n\
--[no-]construct-floats [dis]allow floating point values to be constructed\n"
--[no-]construct-floats [dis]allow floating point values to be constructed\n\
--[no-]relax-branch [dis]allow out-of-range branches to be relaxed\n"
));
#ifdef OBJ_ELF
fprintf (stream, _("\