mirror of
https://github.com/Interlisp/maiko.git
synced 2026-01-26 03:51:32 +00:00
Maiko sources matching state as of 020102 prior to initial patching for Mac OSX
This commit is contained in:
Nick Briggs
236
src/byteswap.c
Executable file
236
src/byteswap.c
Executable file
@@ -0,0 +1,236 @@
|
||||
/* $Id: byteswap.c,v 1.5 2002/01/02 08:15:16 sybalsky Exp $ (C) Copyright Venue, All Rights Reserved */
|
||||
static char *id = "$Id: byteswap.c,v 1.5 2002/01/02 08:15:16 sybalsky Exp $ Copyright (C) Venue";
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
/************************************************************************/
|
||||
/* */
|
||||
/* (C) Copyright 1989-95 Venue. All Rights Reserved. */
|
||||
/* Manufactured in the United States of America. */
|
||||
/* */
|
||||
/* The contents of this file are proprietary information */
|
||||
/* belonging to Venue, and are provided to you under license. */
|
||||
/* They may not be further distributed or disclosed to third */
|
||||
/* parties without the specific permission of Venue. */
|
||||
/* */
|
||||
/************************************************************************/
|
||||
|
||||
|
||||
#include "version.h"
|
||||
|
||||
|
||||
/***************************************************************************/
|
||||
/* */
|
||||
/* byteswap.c */
|
||||
/* */
|
||||
/* Support functions for byte-swapped architecture machines */
|
||||
/* (e.g., 80386's) */
|
||||
/* */
|
||||
/***************************************************************************/
|
||||
|
||||
|
||||
#include "hdw_conf.h"
|
||||
#include "lispemul.h"
|
||||
#include "lispmap.h"
|
||||
#include "lsptypes.h"
|
||||
#include "stack.h"
|
||||
|
||||
#ifdef ISC
|
||||
#include "inlnPS2.h"
|
||||
#else
|
||||
|
||||
|
||||
|
||||
/****************************************************************/
|
||||
/* */
|
||||
/* Byte-swap a single 2-byte word */
|
||||
/* (Name used for general-purpose byte swaps, rather */
|
||||
/* than for fixing up byte-swapped machines) */
|
||||
/* */
|
||||
/****************************************************************/
|
||||
unsigned int swapx(unsigned int word)
|
||||
{
|
||||
return( ((word>>16)&0xffff)+((word&0xffff)<<16) );
|
||||
}
|
||||
|
||||
|
||||
/****************************************************************/
|
||||
/* */
|
||||
/* Byte-swap a single 2-byte word */
|
||||
/* */
|
||||
/****************************************************************/
|
||||
unsigned short byte_swap_word(short unsigned int word)
|
||||
{
|
||||
return( ((word>>8)&0xff)+((word&0xff)<<8) );
|
||||
}
|
||||
|
||||
|
||||
/****************************************************************/
|
||||
/* */
|
||||
/* Word-swap a 2-word integer */
|
||||
/* Does NOT byte-swap the words themselves. */
|
||||
/* */
|
||||
/****************************************************************/
|
||||
/***
|
||||
unsigned int word_swap_longword(word)
|
||||
unsigned int word;
|
||||
{
|
||||
return( ((word>>16)&0xffff)+((word&0xffff)<<16) );
|
||||
} ***/
|
||||
#ifndef I386
|
||||
#define word_swap_longword(word) ( ((word>>16)&0xffff)+((word&0xffff)<<16) )
|
||||
#endif
|
||||
#endif /* AIXPS2 */
|
||||
|
||||
|
||||
/****************************************************************/
|
||||
/* */
|
||||
/* Byte-swap a region wordcount words long */
|
||||
/* This does NOT swap words in a long-word! */
|
||||
/* */
|
||||
/****************************************************************/
|
||||
byte_swap_page(short unsigned int *page, int wordcount)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < wordcount; i++)
|
||||
{
|
||||
*(page+i) = byte_swap_word(*(page+i));
|
||||
}
|
||||
}
|
||||
|
||||
#ifndef GCC386
|
||||
/****************************************************************/
|
||||
/* */
|
||||
/* Byte- & word-swap a region wordcount long-words long */
|
||||
/* */
|
||||
/****************************************************************/
|
||||
void word_swap_page(short unsigned int *page, int longwordcount)
|
||||
{
|
||||
register int i;
|
||||
register unsigned int *longpage;
|
||||
longpage = (unsigned int *) page;
|
||||
for (i = 0; i < (longwordcount+longwordcount); i++)
|
||||
{
|
||||
*(page+i) = byte_swap_word(*(page+i));
|
||||
}
|
||||
for (i = 0; i < longwordcount; i++)
|
||||
{
|
||||
*(longpage+i) = word_swap_longword(*(longpage+i));
|
||||
}
|
||||
}
|
||||
#endif /* GCC386 */
|
||||
|
||||
|
||||
/****************************************************************/
|
||||
/* */
|
||||
/* Bit-reverse all the words in a region */
|
||||
/* */
|
||||
/****************************************************************/
|
||||
|
||||
unsigned char reversedbits[256] =
|
||||
{ /* table of bytes with their bits reversed */
|
||||
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
|
||||
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
|
||||
|
||||
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
|
||||
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
|
||||
|
||||
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
|
||||
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
|
||||
|
||||
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
|
||||
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
|
||||
|
||||
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
|
||||
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
|
||||
|
||||
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
|
||||
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
|
||||
|
||||
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
|
||||
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
|
||||
|
||||
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
|
||||
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
|
||||
|
||||
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
|
||||
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
|
||||
|
||||
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
|
||||
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
|
||||
|
||||
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
|
||||
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
|
||||
|
||||
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
|
||||
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
|
||||
|
||||
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
|
||||
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
|
||||
|
||||
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
|
||||
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
|
||||
|
||||
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
|
||||
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
|
||||
|
||||
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
|
||||
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
|
||||
};
|
||||
|
||||
/*unsigned short reverse_bits(word)
|
||||
unsigned short word;
|
||||
{
|
||||
return ((reversedbits[(word>>8) & 0xFF] <<8) | reversedbits[word & 0xff]);
|
||||
}
|
||||
******/
|
||||
#define reverse_bits(word) ((reversedbits[((word)>>8) & 0xFF] <<8) | reversedbits[(word) & 0xff])
|
||||
|
||||
bit_reverse_region(register short unsigned int *top, int width, int height, int rasterwidth)
|
||||
{
|
||||
register int i, j, wordwid = ((width+31)>>5)<<1;
|
||||
register unsigned short *word;
|
||||
|
||||
for (i = 0; i < height; i++)
|
||||
{
|
||||
word = top;
|
||||
for (j = 0; j < wordwid; j++)
|
||||
{
|
||||
GETWORD(word+j) = reverse_bits(GETWORD(word+j));
|
||||
}
|
||||
word_swap_page((unsigned short *)((UNSIGNED)word&0xFFFFFFFE), (wordwid+1)>>1);
|
||||
top += rasterwidth;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
/************************************************************************/
|
||||
/* */
|
||||
/* b y t e _ s w a p _ c o d e _ b l o c k */
|
||||
/* */
|
||||
/* Byte-swap the opcodes in a piece of compiled code. This */
|
||||
/* can be used to make the compiled bytes be in machine-natural */
|
||||
/* order, so we can avoid pointer arithmetic on the PC in the */
|
||||
/* inner loop. The performance effect isn't yet known (2/92) */
|
||||
/* */
|
||||
/************************************************************************/
|
||||
|
||||
#ifdef RESWAPPEDDCODESTREAM
|
||||
unsigned int byte_swap_code_block (unsigned int *base)
|
||||
{
|
||||
UNSIGNED startpc, len;
|
||||
|
||||
startpc = ((UNSIGNED)base) + ((struct fnhead *)base)->startpc;
|
||||
len = code_block_size(base);
|
||||
|
||||
word_swap_page((unsigned short *)startpc, (len+3)>>2);
|
||||
|
||||
return (UNSIGNED)base;
|
||||
|
||||
} /* end of byte_swap_code_block */
|
||||
#endif /* RESWAPPEDCODESTREAM */
|
||||
Reference in New Issue
Block a user