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Apply Dmitry Diky's patches to add relaxation to msp430.

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This commit is contained in:
Nick Clifton
2004-08-25 12:54:15 +00:00
parent b8a6a751f4
commit 3029be00db
4 changed files with 119 additions and 2 deletions
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4
include/elf/ChangeLog
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@@ -1,3 +1,7 @@
2004-08-25 Dmitry Diky <diwil@spec.ru>
* msp430.h: Add new relocs.
2004-08-12 H.J. Lu <hongjiu.lu@intel.com>
* i386.h (R_386_USED_BY_INTEL_200): New.

4
include/elf/msp430.h
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@@ -1,5 +1,5 @@
/* MSP430 ELF support for BFD.
Copyright (C) 2002 Free Software Foundation, Inc.
Copyright (C) 2002, 2004 Free Software Foundation, Inc.
Contributed by Dmitry Diky <diwil@mail.ru>
This file is part of BFD, the Binary File Descriptor library.
@@ -50,6 +50,8 @@ START_RELOC_NUMBERS (elf_msp430_reloc_type)
RELOC_NUMBER (R_MSP430_16_PCREL, 4)
RELOC_NUMBER (R_MSP430_16_BYTE, 5)
RELOC_NUMBER (R_MSP430_16_PCREL_BYTE, 6)
RELOC_NUMBER (R_MSP430_2X_PCREL, 7)
RELOC_NUMBER (R_MSP430_RL_PCREL, 8)
END_RELOC_NUMBERS (R_MSP430_max)

6
include/opcode/ChangeLog
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@@ -1,3 +1,9 @@
2004-08-24 Dmitry Diky <diwil@spec.ru>
* msp430.h (msp430_opc): Add new instructions.
(msp430_rcodes): Declare new instructions.
(msp430_hcodes): Likewise..
2004-08-13 Nick Clifton <nickc@redhat.com>
PR/301

107
include/opcode/msp430.h
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@@ -1,6 +1,6 @@
/* Opcode table for the TI MSP430 microcontrollers
Copyright 2002 Free Software Foundation, Inc.
Copyright 2002, 2004 Free Software Foundation, Inc.
Contributed by Dmitry Diky <diwil@mail.ru>
This program is free software; you can redistribute it and/or modify
@@ -103,9 +103,114 @@ static struct msp430_opcode_s msp430_opcodes[] =
MSP_INSN (rra, 2, 1, 0x1100, 0xff80),
MSP_INSN (swpb, 2, 1, 0x1080, 0xffc0),
MSP_INSN (rrc, 2, 1, 0x1000, 0xff80),
/* Simple polymorphs. */
MSP_INSN (beq, 4, 0, 0, 0xffff),
MSP_INSN (bne, 4, 1, 0, 0xffff),
MSP_INSN (blt, 4, 2, 0, 0xffff),
MSP_INSN (bltu, 4, 3, 0, 0xffff),
MSP_INSN (bge, 4, 4, 0, 0xffff),
MSP_INSN (bgeu, 4, 5, 0, 0xffff),
MSP_INSN (bltn, 4, 6, 0, 0xffff),
MSP_INSN (jump, 4, 7, 0, 0xffff),
/* Long polymorphs. */
MSP_INSN (bgt, 5, 0, 0, 0xffff),
MSP_INSN (bgtu, 5, 1, 0, 0xffff),
MSP_INSN (bleu, 5, 2, 0, 0xffff),
MSP_INSN (ble, 5, 3, 0, 0xffff),
/* End of instruction set. */
{ NULL, 0, 0, 0, 0 }
};
/* GCC uses the some condition codes which we'll
implement as new polymorph instructions.
COND EXPL SHORT JUMP LONG JUMP
===============================================
eq == jeq jne +4; br lab
ne != jne jeq +4; br lab
ltn honours no-overflow flag
ltn < jn jn +2; jmp +4; br lab
lt < jl jge +4; br lab
ltu < jlo lhs +4; br lab
le <= see below
leu <= see below
gt > see below
gtu > see below
ge >= jge jl +4; br lab
geu >= jhs jlo +4; br lab
===============================================
Therefore, new opcodes are (BranchEQ -> beq; and so on...)
beq,bne,blt,bltn,bltu,bge,bgeu
'u' means unsigned compares
Also, we add 'jump' instruction:
jump UNCOND -> jmp br lab
They will have fmt == 4, and insn_opnumb == number of instruction. */
struct rcodes_s
{
char * name;
int index; /* Corresponding insn_opnumb. */
int sop; /* Opcode if jump length is short. */
long lpos; /* Label position. */
long lop0; /* Opcode 1 _word_ (16 bits). */
long lop1; /* Opcode second word. */
long lop2; /* Opcode third word. */
};
#define MSP430_RLC(n,i,sop,o1) \
{#n, i, sop, 2, (o1 + 2), 0x4010, 0}
static struct rcodes_s msp430_rcodes[] =
{
MSP430_RLC (beq, 0, 0x2400, 0x2000),
MSP430_RLC (bne, 1, 0x2000, 0x2400),
MSP430_RLC (blt, 2, 0x3800, 0x3400),
MSP430_RLC (bltu, 3, 0x2800, 0x2c00),
MSP430_RLC (bge, 4, 0x3400, 0x3800),
MSP430_RLC (bgeu, 5, 0x2c00, 0x2800),
{"bltn", 6, 0x3000, 3, 0x3000 + 1, 0x3c00 + 2,0x4010},
{"jump", 7, 0x3c00, 1, 0x4010, 0, 0},
{0,0,0,0,0,0,0}
};
#undef MSP430_RLC
/* More difficult than above and they have format 5.
COND EXPL SHORT LONG
=================================================================
gt > jeq +2; jge label jeq +6; jl +4; br label
gtu > jeq +2; jhs label jeq +6; jlo +4; br label
leu <= jeq label; jlo label jeq +2; jhs +4; br label
le <= jeq label; jl label jeq +2; jge +4; br label
================================================================= */
struct hcodes_s
{
char * name;
int index; /* Corresponding insn_opnumb. */
int tlab; /* Number of labels in short mode. */
int op0; /* Opcode for first word of short jump. */
int op1; /* Opcode for second word of short jump. */
int lop0; /* Opcodes for long jump mode. */
int lop1;
int lop2;
};
static struct hcodes_s msp430_hcodes[] =
{
{"bgt", 0, 1, 0x2401, 0x3400, 0x2403, 0x3802, 0x4010 },
{"bgtu", 1, 1, 0x2401, 0x2c00, 0x2403, 0x2802, 0x4010 },
{"bleu", 2, 2, 0x2400, 0x2800, 0x2401, 0x2c02, 0x4010 },
{"ble", 3, 2, 0x2400, 0x3800, 0x2401, 0x3402, 0x4010 },
{0,0,0,0,0,0,0,0}
};
#endif