sysdeps/mips/sys/regdef.h

   1 /* Copyright (C) 1997-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _SYS_REGDEF_H
  19 #define _SYS_REGDEF_H
  20
  21 #include <sgidefs.h>
  22
  23 /*
  24  * Symbolic register names for 32 bit ABI
  25  */
  26 #define zero    $0      /* wired zero */
  27 #define AT      $1      /* assembler temp  - uppercase because of ".set at" */
  28 #define v0      $2      /* return value */
  29 #define v1      $3
  30 #define a0      $4      /* argument registers */
  31 #define a1      $5
  32 #define a2      $6
  33 #define a3      $7
  34 #if _MIPS_SIM != _ABIO32
  35 #define a4      $8
  36 #define a5      $9
  37 #define a6      $10
  38 #define a7      $11
  39 #define t0      $12
  40 #define t1      $13
  41 #define t2      $14
  42 #define t3      $15
  43 #define ta0     a4
  44 #define ta1     a5
  45 #define ta2     a6
  46 #define ta3     a7
  47 #else /* if _MIPS_SIM == _ABIO32 */
  48 #define t0      $8      /* caller saved */
  49 #define t1      $9
  50 #define t2      $10
  51 #define t3      $11
  52 #define t4      $12
  53 #define t5      $13
  54 #define t6      $14
  55 #define t7      $15
  56 #define ta0     t4
  57 #define ta1     t5
  58 #define ta2     t6
  59 #define ta3     t7
  60 #endif /* _MIPS_SIM == _ABIO32 */
  61 #define s0      $16     /* callee saved */
  62 #define s1      $17
  63 #define s2      $18
  64 #define s3      $19
  65 #define s4      $20
  66 #define s5      $21
  67 #define s6      $22
  68 #define s7      $23
  69 #define t8      $24     /* caller saved */
  70 #define t9      $25
  71 #define jp      $25     /* PIC jump register */
  72 #define k0      $26     /* kernel scratch */
  73 #define k1      $27
  74 #define gp      $28     /* global pointer */
  75 #define sp      $29     /* stack pointer */
  76 #define fp      $30     /* frame pointer */
  77 #define s8      $30     /* same like fp! */
  78 #define ra      $31     /* return address */
  79
  80 #endif /* _SYS_REGDEF_H */