Update libjpeg_turbo to 1.4.90 from https://github.com/libjpeg-turbo/

jutils.c

Index: jutils.c
diff --git a/jutils.c b/jutils.c
index d18a9555621bae9dce0b814e8afc7c05e877a4cb..f9d35023e5206c5bb5e8aa1107b1df19e5914aa4 100644
--- a/jutils.c
+++ b/jutils.c
@@ -1,9 +1,12 @@
 /*
  * jutils.c
  *
+ * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
+ * It was modified by The libjpeg-turbo Project to include only code
+ * relevant to libjpeg-turbo.
+ * For conditions of distribution and use, see the accompanying README.ijg
+ * file.
  *
  * This file contains tables and miscellaneous utility routines needed
  * for both compression and decompression.
@@ -21,7 +24,7 @@
  * of a DCT block read in natural order (left to right, top to bottom).
  */
 
-#if 0				/* This table is not actually needed in v6a */
+#if 0                           /* This table is not actually needed in v6a */
 
 const int jpeg_zigzag_order[DCTSIZE2] = {
    0,  1,  5,  6, 14, 15, 27, 28,
@@ -87,30 +90,10 @@ jround_up (long a, long b)
 }
 
 
-/* On normal machines we can apply MEMCOPY() and MEMZERO() to sample arrays
- * and coefficient-block arrays.  This won't work on 80x86 because the arrays
- * are FAR and we're assuming a small-pointer memory model.  However, some
- * DOS compilers provide far-pointer versions of memcpy() and memset() even
- * in the small-model libraries.  These will be used if USE_FMEM is defined.
- * Otherwise, the routines below do it the hard way.  (The performance cost
- * is not all that great, because these routines aren't very heavily used.)
- */
-
-#ifndef NEED_FAR_POINTERS	/* normal case, same as regular macros */
-#define FMEMCOPY(dest,src,size)	MEMCOPY(dest,src,size)
-#define FMEMZERO(target,size)	MEMZERO(target,size)
-#else				/* 80x86 case, define if we can */
-#ifdef USE_FMEM
-#define FMEMCOPY(dest,src,size)	_fmemcpy((void FAR *)(dest), (const void FAR *)(src), (size_t)(size))
-#define FMEMZERO(target,size)	_fmemset((void FAR *)(target), 0, (size_t)(size))
-#endif
-#endif
-
-
 GLOBAL(void)
 jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
-		   JSAMPARRAY output_array, int dest_row,
-		   int num_rows, JDIMENSION num_cols)
+                   JSAMPARRAY output_array, int dest_row,
+                   int num_rows, JDIMENSION num_cols)
 /* Copy some rows of samples from one place to another.
  * num_rows rows are copied from input_array[source_row++]
  * to output_array[dest_row++]; these areas may overlap for duplication.
@@ -118,11 +101,7 @@ jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
  */
 {
   register JSAMPROW inptr, outptr;
-#ifdef FMEMCOPY
-  register size_t count = (size_t) (num_cols * SIZEOF(JSAMPLE));
-#else
-  register JDIMENSION count;
-#endif
+  register size_t count = (size_t) (num_cols * sizeof(JSAMPLE));
   register int row;
 
   input_array += source_row;
@@ -131,49 +110,24 @@ jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
   for (row = num_rows; row > 0; row--) {
     inptr = *input_array++;
     outptr = *output_array++;
-#ifdef FMEMCOPY
-    FMEMCOPY(outptr, inptr, count);
-#else
-    for (count = num_cols; count > 0; count--)
-      *outptr++ = *inptr++;	/* needn't bother with GETJSAMPLE() here */
-#endif
+    MEMCOPY(outptr, inptr, count);
   }
 }
 
 
 GLOBAL(void)
 jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row,
-		 JDIMENSION num_blocks)
+                 JDIMENSION num_blocks)
 /* Copy a row of coefficient blocks from one place to another. */
 {
-#ifdef FMEMCOPY
-  FMEMCOPY(output_row, input_row, num_blocks * (DCTSIZE2 * SIZEOF(JCOEF)));
-#else
-  register JCOEFPTR inptr, outptr;
-  register long count;
-
-  inptr = (JCOEFPTR) input_row;
-  outptr = (JCOEFPTR) output_row;
-  for (count = (long) num_blocks * DCTSIZE2; count > 0; count--) {
-    *outptr++ = *inptr++;
-  }
-#endif
+  MEMCOPY(output_row, input_row, num_blocks * (DCTSIZE2 * sizeof(JCOEF)));
 }
 
 
 GLOBAL(void)
-jzero_far (void FAR * target, size_t bytestozero)
-/* Zero out a chunk of FAR memory. */
+jzero_far (void *target, size_t bytestozero)
+/* Zero out a chunk of memory. */
 /* This might be sample-array data, block-array data, or alloc_large data. */
 {
-#ifdef FMEMZERO
-  FMEMZERO(target, bytestozero);
-#else
-  register char FAR * ptr = (char FAR *) target;
-  register size_t count;
-
-  for (count = bytestozero; count > 0; count--) {
-    *ptr++ = 0;
-  }
-#endif
+  MEMZERO(target, bytestozero);
 }