From: Richard Sandiford <rsandifo@redhat.com>
To: binutils@sources.redhat.com
Subject: Rework MIPS nop-insertion code, add -mfix-vr4130 [2/11]
Date: Tue, 08 Mar 2005 14:42:00 -0000 [thread overview]
Message-ID: <wvn1xaqdwrs.fsf@talisman.cambridge.redhat.com> (raw)
In-Reply-To: <wvn6502dwyp.fsf@talisman.cambridge.redhat.com> (Richard Sandiford's message of "Tue, 08 Mar 2005 14:38:22 +0000")
gas used to store the entire contents of the append_insn reloc_type[]
argument in prev_insn_reloc_type. It turns out that element 0 was only
used used to detect MIPS16 absolute jumps and elements 1 and 2 weren't
used at all.
Now that we're using a structure to record the insn history, we might as
well use a bitfield to record the mips16 condition. Doing this makes the
code simpler and shaves three ints off the size of mips_cl_insn.
Tested on mips64{,el}-linux-gnu and mipsisa64{,el}-elf. OK to install?
Richard
* config/tc-mips.c (mips_cl_insn): Replace reloc_type array with
a single mips16_absolute_jump_p bit.
(append_insn): Adjust accordingly.
diff -urpN gas.2/config/tc-mips.c gas/config/tc-mips.c
--- gas.2/config/tc-mips.c 2005-03-08 09:07:40.562917062 +0000
+++ gas/config/tc-mips.c 2005-03-08 10:04:27.514029340 +0000
@@ -146,9 +146,6 @@ struct mips_cl_insn
/* The relocs associated with the instruction, if any. */
fixS *fixp[3];
- /* The reloc types associated with the instruction. */
- bfd_reloc_code_real_type reloc_type[3];
-
/* True if this entry describes a real instruction. */
unsigned int valid_p : 1;
@@ -161,6 +158,9 @@ struct mips_cl_insn
/* True for extended mips16 instructions. */
unsigned int extended_p : 1;
+
+ /* True for mips16 instructions that jump to an absolute address. */
+ unsigned int mips16_absolute_jump_p : 1;
};
/* The ABI to use. */
@@ -2076,8 +2076,7 @@ append_insn (struct mips_cl_insn *ip, ex
mips16_small, mips16_ext,
(prev_pinfo
& INSN_UNCOND_BRANCH_DELAY),
- (*history[0].reloc_type
- == BFD_RELOC_MIPS16_JMP)),
+ history[0].mips16_absolute_jump_p),
make_expr_symbol (address_expr), 0, NULL);
}
else if (mips_opts.mips16
@@ -2714,9 +2713,7 @@ append_insn (struct mips_cl_insn *ip, ex
history[0].fixp[0] = NULL;
history[0].fixp[1] = NULL;
history[0].fixp[2] = NULL;
- history[0].reloc_type[0] = BFD_RELOC_UNUSED;
- history[0].reloc_type[1] = BFD_RELOC_UNUSED;
- history[0].reloc_type[2] = BFD_RELOC_UNUSED;
+ history[0].mips16_absolute_jump_p = 0;
history[0].extended_p = 0;
}
else if (pinfo & INSN_COND_BRANCH_LIKELY)
@@ -2735,9 +2732,7 @@ append_insn (struct mips_cl_insn *ip, ex
history[0].fixp[0] = NULL;
history[0].fixp[1] = NULL;
history[0].fixp[2] = NULL;
- history[0].reloc_type[0] = BFD_RELOC_UNUSED;
- history[0].reloc_type[1] = BFD_RELOC_UNUSED;
- history[0].reloc_type[2] = BFD_RELOC_UNUSED;
+ history[0].mips16_absolute_jump_p = 0;
history[0].extended_p = 0;
history[0].delay_slot_p = 1;
}
@@ -2766,9 +2761,8 @@ append_insn (struct mips_cl_insn *ip, ex
history[0].fixp[0] = fixp[0];
history[0].fixp[1] = fixp[1];
history[0].fixp[2] = fixp[2];
- history[0].reloc_type[0] = reloc_type[0];
- history[0].reloc_type[1] = reloc_type[1];
- history[0].reloc_type[2] = reloc_type[2];
+ history[0].mips16_absolute_jump_p = (reloc_type[0]
+ == BFD_RELOC_MIPS16_JMP);
if (mips_opts.mips16)
history[0].extended_p = (ip->use_extend
|| *reloc_type > BFD_RELOC_UNUSED);
@@ -2793,9 +2787,8 @@ append_insn (struct mips_cl_insn *ip, ex
history[0].use_extend = ip->use_extend;
history[0].extend = ip->extend;
history[0].insn_opcode = ip->insn_opcode;
- history[0].reloc_type[0] = reloc_type[0];
- history[0].reloc_type[1] = reloc_type[1];
- history[0].reloc_type[2] = reloc_type[2];
+ history[0].mips16_absolute_jump_p = (reloc_type[0]
+ == BFD_RELOC_MIPS16_JMP);
history[1].noreorder_p = history[0].noreorder_p;
history[0].noreorder_p = 1;
}
@@ -2824,9 +2817,7 @@ mips_no_prev_insn (int preserve)
history[0].delay_slot_p = 0;
history[0].noreorder_p = 0;
history[0].extended_p = 0;
- history[0].reloc_type[0] = BFD_RELOC_UNUSED;
- history[0].reloc_type[1] = BFD_RELOC_UNUSED;
- history[0].reloc_type[2] = BFD_RELOC_UNUSED;
+ history[0].mips16_absolute_jump_p = 0;
history[1].noreorder_p = 0;
mips_clear_insn_labels ();
}
next prev parent reply other threads:[~2005-03-08 14:42 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-08 14:39 Rework MIPS nop-insertion code, add -mfix-vr4130 [1/11] Richard Sandiford
2005-03-08 14:42 ` Richard Sandiford [this message]
2005-03-08 14:46 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [3/11] Richard Sandiford
2005-03-08 14:50 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [4/11] Richard Sandiford
2005-03-08 14:56 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [5/11] Richard Sandiford
2005-03-08 15:00 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [6/11] Richard Sandiford
2005-03-08 15:05 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [7/11] Richard Sandiford
2005-03-08 15:06 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [8/11] Richard Sandiford
2005-03-08 15:10 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [9/11] Richard Sandiford
2005-03-08 15:12 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [10/11] Richard Sandiford
2005-03-08 15:16 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [11/11] Richard Sandiford
2005-03-08 19:45 ` Eric Christopher
2005-03-08 19:43 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [10/11] Eric Christopher
2005-03-08 19:42 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [9/11] Eric Christopher
2005-03-08 19:19 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [8/11] Eric Christopher
2005-03-08 19:18 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [7/11] Eric Christopher
2005-03-09 9:55 ` Richard Sandiford
2005-03-08 19:12 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [6/11] Eric Christopher
2005-03-08 19:12 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [5/11] Eric Christopher
2005-03-08 19:09 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [4/11] Eric Christopher
2005-03-08 19:08 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [3/11] Eric Christopher
2005-03-08 19:07 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [2/11] Eric Christopher
2005-03-08 19:06 ` Rework MIPS nop-insertion code, add -mfix-vr4130 [1/11] Eric Christopher
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