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mips.opt (mfix-24k): New.

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2011-04-20  Catherine Moore  <clm@codesourcery.com>

	* config/mips/mips.opt (mfix-24k): New.
	* config/mips/mips.h (ASM_SPEC): Handle -mfix-24k.
	* config/mips/mips.md (length): Increase by 4 for stores if
	fixing 24K errata.
	* config/mips/mips.c (mips_reorg_process_insns): Do not allow
	all noreorder if fixing 24K errata.
	* doc/invoke.texi: Document mfix-24k.

From-SVN: r172780
This commit is contained in:
Catherine Moore 2011-04-20 12:54:32 -04:00 committed by Catherine Moore
parent 0147574725
commit 0eda40338e
6 changed files with 29 additions and 4 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2011-04-20 Catherine Moore <clm@codesourcery.com>
* config/mips/mips.opt (mfix-24k): New.
* config/mips/mips.h (ASM_SPEC): Handle -mfix-24k.
* config/mips/mips.md (length): Increase by 4 for stores if
fixing 24K errata.
* config/mips/mips.c (mips_reorg_process_insns): Do not allow
all noreorder if fixing 24K errata.
* doc/invoke.texi: Document mfix-24k.
2011-04-20 Chung-Lin Tang <cltang@codesourcery.com>
* config/arm/arm.c (arm_legitimize_reload_address): For NEON

6
gcc/config/mips/mips.c
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@ -14886,9 +14886,9 @@ mips_reorg_process_insns (void)
if (crtl->profile)
cfun->machine->all_noreorder_p = false;
/* Code compiled with -mfix-vr4120 can't be all noreorder because
we rely on the assembler to work around some errata. */
if (TARGET_FIX_VR4120)
/* Code compiled with -mfix-vr4120 or -mfix-24k can't be all noreorder
because we rely on the assembler to work around some errata. */
if (TARGET_FIX_VR4120 || TARGET_FIX_24K)
cfun->machine->all_noreorder_p = false;
/* The same is true for -mfix-vr4130 if we might generate MFLO or

1
gcc/config/mips/mips.h
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@ -1134,6 +1134,7 @@ enum mips_code_readable_setting {
%{msmartmips} %{mno-smartmips} \
%{mmt} %{mno-mt} \
%{mfix-vr4120} %{mfix-vr4130} \
%{mfix-24k} \
%(subtarget_asm_optimizing_spec) \
%(subtarget_asm_debugging_spec) \
%{mabi=*} %{!mabi=*: %(asm_abi_default_spec)} \

4
gcc/config/mips/mips.md
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@ -479,7 +479,9 @@
(eq_attr "move_type" "load,fpload")
(symbol_ref "mips_load_store_insns (operands[1], insn) * 4")
(eq_attr "move_type" "store,fpstore")
(symbol_ref "mips_load_store_insns (operands[0], insn) * 4")
(cond [(eq (symbol_ref "TARGET_FIX_24K") (const_int 0))
(symbol_ref "mips_load_store_insns (operands[0], insn) * 4")]
(symbol_ref "mips_load_store_insns (operands[0], insn) * 4 + 4"))
;; In the worst case, a call macro will take 8 instructions:
;;

4
gcc/config/mips/mips.opt
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@ -110,6 +110,10 @@ mextern-sdata
Target Report Var(TARGET_EXTERN_SDATA) Init(1)
Use -G for data that is not defined by the current object
mfix-24k
Target Report Var(TARGET_FIX_24K)
Work around certain 24K errata
mfix-r4000
Target Report Mask(FIX_R4000)
Work around certain R4000 errata

8
gcc/doc/invoke.texi
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@ -714,6 +714,7 @@ Objective-C and Objective-C++ Dialects}.
-mdivide-traps -mdivide-breaks @gol
-mmemcpy -mno-memcpy -mlong-calls -mno-long-calls @gol
-mmad -mno-mad -mfused-madd -mno-fused-madd -nocpp @gol
-mfix-24k -mno-fix-24k @gol
-mfix-r4000 -mno-fix-r4000 -mfix-r4400 -mno-fix-r4400 @gol
-mfix-r10000 -mno-fix-r10000 -mfix-vr4120 -mno-fix-vr4120 @gol
-mfix-vr4130 -mno-fix-vr4130 -mfix-sb1 -mno-fix-sb1 @gol
@ -14602,6 +14603,13 @@ circumstances.
Tell the MIPS assembler to not run its preprocessor over user
assembler files (with a @samp{.s} suffix) when assembling them.
@item -mfix-24k
@item -mno-fix-24k
@opindex mfix-24k
@opindex mno-fix-24k
Work around the 24K E48 (lost data on stores during refill) errata.
The workarounds are implemented by the assembler rather than by GCC.
@item -mfix-r4000
@itemx -mno-fix-r4000
@opindex mfix-r4000