This allows to write generic assembly code that will compile under both o32 and n64 ABIs, as otherwise the register definitions would conflict.
Taken from Linux kernel sources, commit 'MIPS: O32: Provide definition of registers ta0 .. ta3.' (3ba1e543ab4b02640d396098f2f6a199560d5f2d). Signed-off-by: Denis Orlov <denorl2...@gmail.com> --- arch/mips/include/asm/regdef.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/mips/include/asm/regdef.h b/arch/mips/include/asm/regdef.h index 1300251661..df87582e8e 100644 --- a/arch/mips/include/asm/regdef.h +++ b/arch/mips/include/asm/regdef.h @@ -3,6 +3,8 @@ * Copyright (C) 1985 MIPS Computer Systems, Inc. * Copyright (C) 1994, 95, 99, 2003 by Ralf Baechle * Copyright (C) 1990 - 1992, 1999 Silicon Graphics, Inc. + * Copyright (C) 2011 Wind River Systems, + * written by Ralf Baechle <r...@linux-mips.org> */ #ifndef _ASM_REGDEF_H #define _ASM_REGDEF_H @@ -27,9 +29,13 @@ #define t2 $10 #define t3 $11 #define t4 $12 +#define ta0 $12 #define t5 $13 +#define ta1 $13 #define t6 $14 +#define ta2 $14 #define t7 $15 +#define ta3 $15 #define s0 $16 /* callee saved */ #define s1 $17 #define s2 $18 -- 2.41.0
