cregit-Linux how code gets into the kernel

Release 4.11 arch/powerpc/xmon/spu.h

/* SPU ELF support for BFD.

   Copyright 2006 Free Software Foundation, Inc.

   This file is part of GDB, GAS, and the GNU binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */


/* These two enums are from rel_apu/common/spu_asm_format.h */
/* definition of instruction format */
typedef enum {
  
RRR,
  
RI18,
  
RI16,
  
RI10,
  
RI8,
  
RI7,
  
RR,
  
LBT,
  
LBTI,
  
IDATA,
  
UNKNOWN_IFORMAT
} 
spu_iformat;

/* These values describe assembly instruction arguments.  They indicate
 * how to encode, range checking and which relocation to use. */
typedef enum {
  
A_T,  /* register at pos 0 */
  
A_A,  /* register at pos 7 */
  
A_B,  /* register at pos 14 */
  
A_C,  /* register at pos 21 */
  
A_S,  /* special purpose register at pos 7 */
  
A_H,  /* channel register at pos 7 */
  
A_P,  /* parenthesis, this has to separate regs from immediates */
  
A_S3,
  
A_S6,
  
A_S7N,
  
A_S7,
  
A_U7A,
  
A_U7B,
  
A_S10B,
  
A_S10,
  
A_S11,
  
A_S11I,
  
A_S14,
  
A_S16,
  
A_S18,
  
A_R18,
  
A_U3,
  
A_U5,
  
A_U6,
  
A_U7,
  
A_U14,
  
A_X16,
  
A_U18,
  
A_MAX
} 
spu_aformat;


enum spu_insns {

#define APUOP(TAG,MACFORMAT,OPCODE,MNEMONIC,ASMFORMAT,DEP,PIPE) \
	TAG,

#define APUOPFB(TAG,MACFORMAT,OPCODE,FB,MNEMONIC,ASMFORMAT,DEP,PIPE) \
	TAG,
#include "spu-insns.h"

#undef APUOP

#undef APUOPFB
        
M_SPU_MAX
};


struct spu_opcode
{
   
spu_iformat insn_type;
   
unsigned int opcode;
   
char *mnemonic;
   
int arg[5];
};


#define SIGNED_EXTRACT(insn,size,pos) (((int)((insn) << (32-size-pos))) >> (32-size))

#define UNSIGNED_EXTRACT(insn,size,pos) (((insn) >> pos) & ((1 << size)-1))


#define DECODE_INSN_RT(insn) (insn & 0x7f)

#define DECODE_INSN_RA(insn) ((insn >> 7) & 0x7f)

#define DECODE_INSN_RB(insn) ((insn >> 14) & 0x7f)

#define DECODE_INSN_RC(insn) ((insn >> 21) & 0x7f)


#define DECODE_INSN_I10(insn) SIGNED_EXTRACT(insn,10,14)

#define DECODE_INSN_U10(insn) UNSIGNED_EXTRACT(insn,10,14)

/* For branching, immediate loads, hbr and  lqa/stqa. */

#define DECODE_INSN_I16(insn) SIGNED_EXTRACT(insn,16,7)

#define DECODE_INSN_U16(insn) UNSIGNED_EXTRACT(insn,16,7)

/* for stop */

#define DECODE_INSN_U14(insn) UNSIGNED_EXTRACT(insn,14,0)

/* For ila */

#define DECODE_INSN_I18(insn) SIGNED_EXTRACT(insn,18,7)

#define DECODE_INSN_U18(insn) UNSIGNED_EXTRACT(insn,18,7)

/* For rotate and shift and generate control mask */

#define DECODE_INSN_I7(insn) SIGNED_EXTRACT(insn,7,14)

#define DECODE_INSN_U7(insn) UNSIGNED_EXTRACT(insn,7,14)

/* For float <-> int conversion */

#define DECODE_INSN_I8(insn)  SIGNED_EXTRACT(insn,8,14)

#define DECODE_INSN_U8(insn) UNSIGNED_EXTRACT(insn,8,14)

/* For hbr  */

#define DECODE_INSN_I9a(insn) ((SIGNED_EXTRACT(insn,2,23) << 7) | UNSIGNED_EXTRACT(insn,7,0))

#define DECODE_INSN_I9b(insn) ((SIGNED_EXTRACT(insn,2,14) << 7) | UNSIGNED_EXTRACT(insn,7,0))

#define DECODE_INSN_U9a(insn) ((UNSIGNED_EXTRACT(insn,2,23) << 7) | UNSIGNED_EXTRACT(insn,7,0))

#define DECODE_INSN_U9b(insn) ((UNSIGNED_EXTRACT(insn,2,14) << 7) | UNSIGNED_EXTRACT(insn,7,0))


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