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/*- * Copyright (c) 2001, Juniper Networks, Inc. * All rights reserved. * Truman Joe, February 2001. * * regdef.h -- MIPS register definitions. * * JNPR: regdef.h,v 1.3 2006/08/07 05:38:57 katta * $FreeBSD: release/9.1.0/sys/mips/include/regdef.h 202175 2010-01-12 21:36:08Z imp $ */ #ifndef _MACHINE_REGDEF_H_ #define _MACHINE_REGDEF_H_ #include <machine/cdefs.h> /* For API selection */ #if defined(__ASSEMBLER__) /* General purpose CPU register names */ #define zero $0 /* wired zero */ #define AT $at /* assembler temp */ #define v0 $2 /* return value */ #define v1 $3 #define a0 $4 /* argument registers */ #define a1 $5 #define a2 $6 #define a3 $7 #if defined(__mips_n32) || defined(__mips_n64) #define a4 $8 #define a5 $9 #define a6 $10 #define a7 $11 #define t0 $12 /* Temp regs, not saved accross subroutine calls */ #define t1 $13 #define t2 $14 #define t3 $15 #else #define t0 $8 /* caller saved */ #define t1 $9 #define t2 $10 #define t3 $11 #define t4 $12 /* caller saved - 32 bit env arg reg 64 bit */ #define t5 $13 #define t6 $14 #define t7 $15 #endif #define s0 $16 /* callee saved */ #define s1 $17 #define s2 $18 #define s3 $19 #define s4 $20 #define s5 $21 #define s6 $22 #define s7 $23 #define t8 $24 /* code generator */ #define t9 $25 #define k0 $26 /* kernel temporary */ #define k1 $27 #define gp $28 /* global pointer */ #define sp $29 /* stack pointer */ #define fp $30 /* frame pointer */ #define s8 $30 /* 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. */ #if defined(__mips_n32) || defined(__mips_n64) #define ta0 $8 #define ta1 $9 #define ta2 $10 #define ta3 $11 #else #define ta0 $12 #define ta1 $13 #define ta2 $14 #define ta3 $15 #endif /* __mips_n32 || __mips_n64 */ #endif /* __ASSEMBLER__ */ #endif /* !_MACHINE_REGDEF_H_ */