Date: Mon, 28 Apr 2003 13:40:40 -0700 (PDT) From: Juli Mallett <jmallett@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 29968 for review Message-ID: <200304282040.h3SKee4c066575@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=29968 Change 29968 by jmallett@jmallett_dalek on 2003/04/28 13:40:25 MFNetBSD, new ABI register definitions. Hmm, I wonder if the compiler is defaulting to the right one though :) Affected files ... .. //depot/projects/mips/sys/mips/include/regdef.h#2 edit Differences ... ==== //depot/projects/mips/sys/mips/include/regdef.h#2 (text+ko) ==== @@ -1,4 +1,4 @@ -/* $NetBSD: regdef.h,v 1.7 1999/03/30 14:22:58 soda Exp $ */ +/* $NetBSD: regdef.h,v 1.10 2002/11/04 03:38:32 thorpej Exp $ */ /* * Copyright (c) 1992, 1993 @@ -50,14 +50,14 @@ #define a1 $5 #define a2 $6 #define a3 $7 -#define t0 $8 /* temp registers (not saved across subroutine calls) */ -#define t1 $9 -#define t2 $10 -#define t3 $11 -#define t4 $12 -#define t5 $13 -#define t6 $14 -#define t7 $15 +#define a4 $8 +#define a5 $9 +#define a6 $10 +#define a7 $11 +#define t0 $12 /* temp registers (not saved across subroutine calls) */ +#define t1 $13 +#define t2 $14 +#define t3 $15 #define s0 $16 /* saved across subroutine calls (callee saved) */ #define s1 $17 #define s2 $18 @@ -75,4 +75,17 @@ #define s8 $30 /* one more callee saved */ #define ra $31 /* return address */ +/* + * These are temp registers whose names can be used in either the old + * or new ABI, although they map to different physical registers. In + * the old ABI, they map to t4-t7, and in the new ABI, they map to a4-a7. + * + * Because they overlap with the last 4 arg regs in the new ABI, ta0-ta3 + * should be used only when we need more than t0-t3. + */ +#define ta0 $8 +#define ta1 $9 +#define ta2 $10 +#define ta3 $11 + #endif /* _MIPS_REGDEF_H */
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