On Mar 24, 2005, at 05:20, Alan Grimes wrote:
Someone forgot to check in sqMemoryAccess.h?
I didn't think so, but here you go in case I did...
Ian
/* sqMemoryAccess.h -- memory accessors (and associated type definitions) * * Author: Ian.Piumarta@squeakland.org * * Last edited: 2005-03-28 23:02:04 by piumarta on emilia.local */
/* Systematic use of the macros defined in this file within the * Interpreter, ObjectMemory and plugins will permit all four * combinations of 32/64-bit image and 32/64-bit host to compile and * run correctly. (Code that uses explicit casts and/or integer * constants in arithmetic on object pointers will invariably fail in * at least one of the four possible combinations.) */
#ifndef __sqMemoryAccess_h #define __sqMemoryAccess_h
#include "config.h"
#if defined(HAVE_INTERP_H) # include "interp.h" #else # define SQ_VI_BYTES_PER_WORD 4 /* build a 32-bit VM */ # warning # warning *************************************************** # warning * # warning * interp.h not found -- defaulting to a 32-bit VM # warning * # warning * update your image-side VM sources to the latest # warning * version to avoid this message # warning * # warning *************************************************** # warning #endif
#if (SQ_VI_BYTES_PER_WORD == 4) # define SQ_IMAGE32 1 #else # define SQ_IMAGE64 1 #endif
#if (SIZEOF_VOID_P == 4) # define SQ_HOST32 1 #elif (SIZEOF_VOID_P == 8) # define SQ_HOST64 1 #else # error host is neither 32- nor 64-bit? #endif
#if defined(SQ_IMAGE32) typedef int sqInt; typedef unsigned int usqInt; #elif defined(SQ_HOST64) typedef long sqInt; typedef unsigned long usqInt; #else # if (SIZEOF_LONG_LONG != 8) # error long long integers are not 64-bits wide? # endif typedef long long sqInt; typedef unsigned long long usqInt; #endif
#if defined(SQ_HOST64) && defined(SQ_IMAGE32) extern char *sqMemoryBase; # define SQ_FAKE_MEMORY_OFFSET 16 // (1*1024*1024) /* nonzero to debug addr xlation */ #else # define sqMemoryBase ((char *)0) #endif
static inline sqInt byteAtPointer(char *ptr) { return (sqInt)(*((unsigned char *)ptr)); } static inline sqInt byteAtPointerput(char *ptr, int val) { return (sqInt)(*((unsigned char *)ptr)= (unsigned char)val); } static inline sqInt shortAtPointer(char *ptr) { return (sqInt)(*((short *)ptr)); } static inline sqInt shortAtPointerput(char *ptr, int val) { return (sqInt)(*((short *)ptr)= (short)val); } static inline sqInt intAtPointer(char *ptr) { return (sqInt)(*((unsigned int *)ptr)); } static inline sqInt intAtPointerput(char *ptr, int val) { return (sqInt)(*((unsigned int *)ptr)= (int)val); } static inline sqInt longAtPointer(char *ptr) { return (sqInt)(*((sqInt *)ptr)); } static inline sqInt longAtPointerput(char *ptr, sqInt val) { return (sqInt)(*((sqInt *)ptr)= (sqInt)val); } static inline sqInt oopAtPointer(char *ptr) { return (sqInt)(*((sqInt *)ptr)); } static inline sqInt oopAtPointerput(char *ptr, sqInt val) { return (sqInt)(*((sqInt *)ptr)= (sqInt)val); }
static inline char *pointerForOop(sqInt oop) { return sqMemoryBase + oop; } static inline sqInt oopForPointer(char *ptr) { return (sqInt)(ptr - sqMemoryBase); }
static inline sqInt byteAt(sqInt oop) { return byteAtPointer(pointerForOop(oop)); } static inline sqInt byteAtput(sqInt oop, int val) { return byteAtPointerput(pointerForOop(oop), val); } static inline sqInt shortAt(sqInt oop) { return shortAtPointer(pointerForOop(oop)); } static inline sqInt shortAtput(sqInt oop, int val) { return shortAtPointerput(pointerForOop(oop), val); } static inline sqInt intAt(sqInt oop) { return intAtPointer(pointerForOop(oop)); } static inline sqInt intAtput(sqInt oop, int val) { return intAtPointerput(pointerForOop(oop), val); } static inline sqInt longAt(sqInt oop) { return longAtPointer(pointerForOop(oop)); } static inline sqInt longAtput(sqInt oop, sqInt val) { return longAtPointerput(pointerForOop(oop), val); } static inline sqInt oopAt(sqInt oop) { return oopAtPointer(pointerForOop(oop)); } static inline sqInt oopAtput(sqInt oop, sqInt val) { return oopAtPointerput(pointerForOop(oop), val); }
#define long32At intAt #define long32Atput intAtput
/* platform-dependent float conversion macros */ /* Note: Second argument must be a variable name, not an expression! */ /* Note: Floats in image are always in PowerPC word order; change these macros to swap words if necessary. This costs no extra and obviates sometimes having to word-swap floats when reading an image. */ #if defined(DOUBLE_WORD_ALIGNMENT) || defined(DOUBLE_WORD_ORDER) /* this is to allow strict aliasing assumption in the optimizer */ typedef union { double d; int i[sizeof(double) / sizeof(int)]; } _swapper; # ifdef DOUBLE_WORD_ORDER /* word-based copy with swapping for non-PowerPC order */ # define storeFloatAtPointerfrom(intPointerToFloat, floatVarName) \ *((int *)(intPointerToFloat) + 0) = ((_swapper *)(&floatVarName))->i[1]; \ *((int *)(intPointerToFloat) + 1) = ((_swapper *)(&floatVarName))->i[0]; # define fetchFloatAtPointerinto(intPointerToFloat, floatVarName) \ ((_swapper *)(&floatVarName))->i[1] = *((int *)(intPointerToFloat) + 0); \ ((_swapper *)(&floatVarName))->i[0] = *((int *)(intPointerToFloat) + 1); # else /*!DOUBLE_WORD_ORDER*/ /* word-based copy for machines with alignment restrictions */ # define storeFloatAtPointerfrom(intPointerToFloat, floatVarName) \ *((int *)(intPointerToFloat) + 0) = ((_swapper *)(&floatVarName))->i[0]; \ *((int *)(intPointerToFloat) + 1) = ((_swapper *)(&floatVarName))->i[1]; # define fetchFloatAtPointerinto(intPointerToFloat, floatVarName) \ ((_swapper *)(&floatVarName))->i[0] = *((int *)(intPointerToFloat) + 0); \ ((_swapper *)(&floatVarName))->i[1] = *((int *)(intPointerToFloat) + 1); # endif /*!DOUBLE_WORD_ORDER*/ #else /*!(DOUBLE_WORD_ORDER||DOUBLE_WORD_ALIGNMENT)*/ /* for machines that allow doubles to be on any word boundary */ # define storeFloatAtPointerfrom(i, floatVarName) \ *((double *) (i)) = (floatVarName); # define fetchFloatAtPointerinto(i, floatVarName) \ (floatVarName) = *((double *) (i)); #endif
#define storeFloatAtfrom(i, floatVarName) storeFloatAtPointerfrom(pointerForOop(i), floatVarName) #define fetchFloatAtinto(i, floatVarName) fetchFloatAtPointerinto(pointerForOop(i), floatVarName)
/* This doesn't belong here, but neither do 'self flag: ...'s belong in the image. */
static void inline flag(char *ignored) {}
#endif /* __sqMemoryAccess_h */