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authorClaudiu Zissulescu <claziss@synopsys.com>2016-02-10 12:09:01 +0000
committerNick Clifton <nickc@redhat.com>2016-02-10 12:09:01 +0000
commit4670103e86f59a80259fd593a6949d693382e536 (patch)
treebc0ae65cc94a89c6fa81629a350abf6c9b243123 /gas/config/tc-arc.h
parent83da6e748c8f105f07e17f53aa6b99ed7867ff5f (diff)
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Add support for ARC instruction relaxation in the assembler.
gas/ 2016-01-26 Claudiu Zissulescu <claziss@synopsys.com> Janek van Oirschot <jvanoirs@synopsys.com> * config/tc-arc.h (TC_FRAG_TYPE, TC_PCREL_ADJUST, MAX_INSN_ARGS) (MAX_INSN_FLGS, MAX_FLAG_NAME_LENGHT, TC_GENERIC_RELAX_TABLE): Define. (arc_flags, arc_relax_type): New structure. * config/tc-arc.c (FRAG_MAX_GROWTH, RELAX_TABLE_ENTRY) (RELAX_TABLE_ENTRY_MAX): New define. (relaxation_state, md_relax_table, arc_relaxable_insns) (arc_num_relaxable_ins): New variable. (rlx_operand_type, arc_rlx_types): New enums. (arc_relaxable_ins): New structure. (OPTION_RELAX): New option. (arc_insn): New relax member. (arc_flags): Remove. (relax_insn_p): New function. (apply_fixups): Likewise. (relaxable_operand): Likewise. (may_relax_expr): Likewise. (relaxable_flag): Likewise. (arc_pcrel_adjust): Likewise. (md_estimate_size_before_relax): Implement. (md_convert_frag): Likewise. (md_parse_option): Handle new mrelax option. (md_show_usage): Likewise. (assemble_insn): Set relax member. (emit_insn0): New function. (emit_insn1): Likewise. (emit_insn): Handle relaxation case. * NEWS: Mention the new relaxation option. * doc/c-arc.texi (ARC Options): Document new mrelax option. gas/testsuite 2016-01-26 Claudiu Zissulescu <claziss@synopsys.com> * gas/arc/relax-avoid1.d: New file. * gas/arc/relax-avoid1.s: Likewise. * gas/arc/relax-avoid2.d: Likewise. * gas/arc/relax-avoid2.s: Likewise. * gas/arc/relax-avoid3.d: Likewise. * gas/arc/relax-avoid3.s: Likewise. * gas/arc/relax-b.d: Likewise. * gas/arc/relax-b.s: Likewise. include/opcode/ 2016-01-26 Claudiu Zissulescu <claziss@synopsys.com> Janek van Oirschot <jvanoirs@synopsys.com> * arc.h (arc_opcode arc_relax_opcodes, arc_num_relax_opcodes): Declare. opcodes/ 2016-01-26 Claudiu Zissulescu <claziss@synopsys.com> Janek van Oirschot <jvanoirs@synopsys.com> * arc-opc.c (arc_relax_opcodes, arc_num_relax_opcodes): New variable.
Diffstat (limited to 'gas/config/tc-arc.h')
-rw-r--r--gas/config/tc-arc.h56
1 files changed, 56 insertions, 0 deletions
diff --git a/gas/config/tc-arc.h b/gas/config/tc-arc.h
index ca5b152..acd007b 100644
--- a/gas/config/tc-arc.h
+++ b/gas/config/tc-arc.h
@@ -177,6 +177,14 @@ extern long md_pcrel_from_section (struct fix *, segT);
/* This hook is required to parse register names as operands. */
#define md_parse_name(name, exp, m, c) arc_parse_name (name, exp)
+/* Used within frags to pass some information to some relaxation
+ machine dependent values. */
+#define TC_FRAG_TYPE struct arc_relax_type
+
+/* Adjust non PC-rel values at relaxation time. */
+#define TC_PCREL_ADJUST(F) arc_pcrel_adjust (F)
+
+extern int arc_pcrel_adjust (fragS *);
extern bfd_boolean arc_parse_name (const char *, struct expressionS *);
extern int tc_arc_fix_adjustable (struct fix *);
extern void arc_handle_align (fragS *);
@@ -193,3 +201,51 @@ extern void arc_frob_label (symbolS *);
#define NOP_OPCODE_S 0x000078E0
#define NOP_OPCODE_L 0x264A7000 /* mov 0,0. */
+#define MAX_FLAG_NAME_LENGHT 3
+
+struct arc_flags
+{
+ /* Name of the parsed flag. */
+ char name[MAX_FLAG_NAME_LENGHT + 1];
+
+ /* The code of the parsed flag. Valid when is not zero. */
+ unsigned char code;
+};
+
+#ifndef MAX_INSN_ARGS
+#define MAX_INSN_ARGS 6
+#endif
+
+#ifndef MAX_INSN_FLGS
+#define MAX_INSN_FLGS 3
+#endif
+
+extern const relax_typeS md_relax_table[];
+#define TC_GENERIC_RELAX_TABLE md_relax_table
+
+/* Used to construct instructions at md_convert_frag stage of
+ relaxation. */
+struct arc_relax_type
+{
+ /* Dictates whether the pc-relativity should be kept in mind when
+ relax_frag is called or whether the pc-relativity should be
+ solved outside of relaxation. For clarification: BL(_S) and
+ B(_S) use pcrel == 1 and ADD with a solvable expression as 3rd
+ operand use pcrel == 0. */
+ unsigned char pcrel;
+
+ /* Expressions that dictate the operands. Used for re-assembling in
+ md_convert_frag. */
+ expressionS tok[MAX_INSN_ARGS];
+
+ /* Number of tok (i.e. number of operands). Used for re-assembling
+ in md_convert_frag. */
+ int ntok;
+
+ /* Flags of instruction. Used for re-assembling in
+ md_convert_frag. */
+ struct arc_flags pflags[MAX_INSN_FLGS];
+
+ /* Number of flags. Used for re-assembling in md_convert_frag. */
+ int nflg;
+};