Source to EXTERNAL_HEADERS/architecture/ppc/reg_help.h
/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
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*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
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*
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/* Copyright (c) 1996 NeXT Software, Inc. All rights reserved.
*
* File: architecture/ppc/reg_help.h
* Author: Doug Mitchell, NeXT Computer, Inc.
*
* m98k-specific macros and inlines for defining machine registers.
*
* HISTORY
* 05-Nov-92 Doug Mitchell at NeXT
* Created.
*
* 29-Dec-96 Umesh Vaishampayan ([email protected])
* Ported from m98k. Removed dependency on nrw directory.
* Merged code from architecture/nrw/reg_help.h.
* Moved Register Usage #defines from asm_help.h in here.
*/
#ifndef _ARCH_PPC_REG_HELP_H_
#define _ARCH_PPC_REG_HELP_H_
#if defined(__ASSEMBLER__)
/*
* GRF Register Usage Aliases
*/
#define zt r0 // architecturally 0 for mem refs only!
// real reg other inst, caller-saved
#define sp r1 // stack pointer, callee-saved
#define toc r2 // tbl of contents, callee-saved
#define a0 r3 // arg 0, return value 0, caller saved
#define a1 r4 // arg 1, return value 1, caller saved
#define a2 r5 // ....
#define a3 r6
#define a4 r7
#define a5 r8
#define a6 r9
#define a7 r10 // arg 7, return value 7, caller saved
#define ep r11 // environment ptr, caller saved
#define at r12 // assembler temp, caller saved
#define s17 r13 // callee-saved 17
#define s16 r14
#define s15 r15
#define s14 r16
#define s13 r17
#define s12 r18
#define s11 r19
#define s10 r20
#define s9 r21
#define s8 r22
#define s7 r23
#define s6 r24
#define s5 r25
#define s4 r26
#define s3 r27
#define s2 r28
#define s1 r29 // ....
#define s0 r30 // callee-saved 0
#define fp r31 // frame-pointer, callee-saved
/*
* Conversion of GRF aliases to register numbers
*/
#define GRF_ZT 0 // architecturally 0 for mem refs only!
// real reg other inst, caller-saved
#define GRF_SP 1 // stack pointer, callee-saved
#define GRF_TOC 2 // tbl of contents, callee-saved
#define GRF_A0 3 // arg 0, return value 0, caller saved
#define GRF_A1 4 // arg 1, return value 1, caller saved
#define GRF_A2 5 // ....
#define GRF_A3 6
#define GRF_A4 7
#define GRF_A5 8
#define GRF_A6 9
#define GRF_A7 10 // arg 7, return value 7, caller saved
#define GRF_EP 11 // environment ptr, caller saved
#define GRF_AT 12 // assembler temp, caller saved
#define GRF_S17 13 // callee-saved 17
#define GRF_S16 14
#define GRF_S15 15
#define GRF_S14 16
#define GRF_S13 17
#define GRF_S12 18
#define GRF_S11 19
#define GRF_S10 20
#define GRF_S9 21
#define GRF_S8 22
#define GRF_S7 23
#define GRF_S6 24
#define GRF_S5 25
#define GRF_S4 26
#define GRF_S3 27
#define GRF_S2 28
#define GRF_S1 29 // ....
#define GRF_S0 30 // callee-saved 0
#define GRF_FP 31 // frame pointer, callee-saved
/*
* FPF Register names
*/
#define ft0 f0 // scratch reg, caller-saved
#define fa0 f1 // fp arg 0, return 0, caller-saved
#define fa1 f2 // fp arg 1, caller-saved
#define fa2 f3 // fp arg 2, caller-saved
#define fa3 f4
#define fa4 f5
#define fa5 f6
#define fa6 f7
#define fa7 f8
#define fa8 f9
#define fa9 f10
#define fa10 f11
#define fa11 f12
#define fa12 f13 // fp arg 12, caller-saved
#define fs17 f14 // callee-saved 17
#define fs16 f15
#define fs15 f16
#define fs14 f17
#define fs13 f18
#define fs12 f19
#define fs11 f20
#define fs10 f21
#define fs9 f22
#define fs8 f23
#define fs7 f24
#define fs6 f25
#define fs5 f26
#define fs4 f27
#define fs3 f28
#define fs2 f29
#define fs1 f30
#define fs0 f31 // callee-saved 0
/*
* Conversion of FPF aliases to register numbers
*/
#define FPF_FT0 0 // scratch reg, caller-saved
#define FPF_FA0 1 // fp arg 0, return 0, caller-saved
#define FPF_FA1 2 // fp arg 1, caller-saved
#define FPF_FA2 3 // fp arg 2, caller-saved
#define FPF_FA3 4
#define FPF_FA4 5
#define FPF_FA5 6
#define FPF_FA6 7
#define FPF_FA7 8
#define FPF_FA8 9
#define FPF_FA9 10
#define FPF_FA10 11
#define FPF_FA11 12
#define FPF_FA12 13 // fp arg 12, caller-saved
#define FPF_FS17 14 // callee-saved 17
#define FPF_FS16 15
#define FPF_FS15 16
#define FPF_FS14 17
#define FPF_FS13 18
#define FPF_FS12 19
#define FPF_FS11 20
#define FPF_FS10 21
#define FPF_FS9 22
#define FPF_FS8 23
#define FPF_FS7 24
#define FPF_FS6 25
#define FPF_FS5 26
#define FPF_FS4 27
#define FPF_FS3 28
#define FPF_FS2 29
#define FPF_FS1 30
#define FPF_FS0 31 // callee-saved 0
#endif /* __ASSEMBLER__ */
/* Bitfield definition aid */
#define BITS_WIDTH(msb, lsb) ((msb)-(lsb)+1)
#define BIT_WIDTH(pos) (1) /* mostly to record the position */
/* Mask creation */
#define MKMASK(width, offset) (((unsigned)-1)>>(32-(width))<<(offset))
#define BITSMASK(msb, lsb) MKMASK(BITS_WIDTH(msb, lsb), lsb & 0x1f)
#define BITMASK(pos) MKMASK(BIT_WIDTH(pos), pos & 0x1f)
/* Register addresses */
#if __ASSEMBLER__
# define REG_ADDR(type, addr) (addr)
#else /* ! __ASSEMBLER__ */
# define REG_ADDR(type, addr) (*(volatile type *)(addr))
#endif /* __ASSEMBLER__ */
/* Cast a register to be an unsigned */
/* CAUTION : non naturally aligned foo can result into alignment traps
* use at own risk.
*/
#define CONTENTS(foo) (*(unsigned *) &(foo))
/* STRINGIFY -- perform all possible substitutions, then stringify */
#define __STR(x) #x /* just a helper macro */
#define STRINGIFY(x) __STR(x)
/*
* Stack pointer must always be a multiple of 16
*/
#define STACK_INCR 16