[AArch64][SVE 31/32] Add SVE instructions

[deliverable/binutils-gdb.git] / gas / sb.c

diff --git a/gas/sb.c b/gas/sb.c
index 5fa0bc669eb3b8f1c67bab74123a48c69ddeaccb..76d555e34024d2fe40ba2db28535479ff135fa4a 100644 (file)
--- a/gas/sb.c
+++ b/gas/sb.c
@@ -1,5 +1,5 @@
 /* sb.c - string buffer manipulation routines
 /* sb.c - string buffer manipulation routines

-   Copyright 1994, 1995, 2000, 2003, 2006 Free Software Foundation, Inc.
+   Copyright (C) 1994-2016 Free Software Foundation, Inc.

 
    Written by Steve and Judy Chamberlain of Cygnus Support,
       sac@cygnus.com
 
    Written by Steve and Judy Chamberlain of Cygnus Support,
       sac@cygnus.com


@@ -8,7 +8,7 @@
 
    GAS is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
 
    GAS is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

-   the Free Software Foundation; either version 2, or (at your option)
+   the Free Software Foundation; either version 3, or (at your option)

    any later version.
 
    GAS is distributed in the hope that it will be useful,
    any later version.
 
    GAS is distributed in the hope that it will be useful,


@@ -24,6 +24,13 @@
 #include "as.h"
 #include "sb.h"
 
 #include "as.h"
 #include "sb.h"
 

+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+#ifndef CHAR_BIT
+#define CHAR_BIT 8
+#endif
+

 /* These routines are about manipulating strings.
 
    They are managed in things called `sb's which is an abbreviation
 /* These routines are about manipulating strings.
 
    They are managed in things called `sb's which is an abbreviation


@@ -38,53 +45,29 @@
    use foo->ptr[*];
    sb_kill (&foo);  */
 
    use foo->ptr[*];
    sb_kill (&foo);  */
 

-static int dsize = 5;
-static void sb_check (sb *, int);
-
-/* Statistics of sb structures.  */
-static int string_count[sb_max_power_two];
+/* Buffers start at INIT_ALLOC size, and roughly double each time we
+   go over the current allocation.  MALLOC_OVERHEAD is a guess at the
+   system malloc overhead.  We aim to not waste any memory in the
+   underlying page/chunk allocated by the system malloc.  */
+#define MALLOC_OVERHEAD (2 * sizeof (size_t))
+#define INIT_ALLOC (64 - MALLOC_OVERHEAD - 1)

 
 

-/* Free list of sb structures.  */
-static struct
-{
-  sb_element *size[sb_max_power_two];
-} free_list;
+static void sb_check (sb *, size_t);

 
 /* Initializes an sb.  */
 
 
 /* Initializes an sb.  */
 

-static void
-sb_build (sb *ptr, int size)
+void
+sb_build (sb *ptr, size_t size)

 {
 {

-  /* See if we can find one to allocate.  */
-  sb_element *e;
-
-  assert (size < sb_max_power_two);
-
-  e = free_list.size[size];
-  if (!e)
-    {
-      /* Nothing there, allocate one and stick into the free list.  */
-      e = (sb_element *) xmalloc (sizeof (sb_element) + (1 << size));
-      e->next = free_list.size[size];
-      e->size = 1 << size;
-      free_list.size[size] = e;
-      string_count[size]++;
-    }
-
-  /* Remove from free list.  */
-  free_list.size[size] = e->next;
-
-  /* Copy into callers world.  */
-  ptr->ptr = e->data;
-  ptr->pot = size;
+  ptr->ptr = XNEWVEC (char, size + 1);
+  ptr->max = size;

   ptr->len = 0;
   ptr->len = 0;

-  ptr->item = e;

 }
 
 void
 sb_new (sb *ptr)
 {
 }
 
 void
 sb_new (sb *ptr)
 {

-  sb_build (ptr, dsize);
+  sb_build (ptr, INIT_ALLOC);

 }
 
 /* Deallocate the sb at ptr.  */
 }
 
 /* Deallocate the sb at ptr.  */


@@ -92,9 +75,7 @@ sb_new (sb *ptr)
 void
 sb_kill (sb *ptr)
 {
 void
 sb_kill (sb *ptr)
 {

-  /* Return item to free list.  */
-  ptr->item->next = free_list.size[ptr->pot];
-  free_list.size[ptr->pot] = ptr->item;
+  free (ptr->ptr);

 }
 
 /* Add the sb at s to the end of the sb at ptr.  */
 }
 
 /* Add the sb at s to the end of the sb at ptr.  */


@@ -111,10 +92,10 @@ sb_add_sb (sb *ptr, sb *s)
 
 static sb *sb_to_scrub;
 static char *scrub_position;
 
 static sb *sb_to_scrub;
 static char *scrub_position;

-static int
-scrub_from_sb (char *buf, int buflen)
+static size_t
+scrub_from_sb (char *buf, size_t buflen)

 {
 {

-  int copy;
+  size_t copy;

   copy = sb_to_scrub->len - (scrub_position - sb_to_scrub->ptr);
   if (copy > buflen)
     copy = buflen;
   copy = sb_to_scrub->len - (scrub_position - sb_to_scrub->ptr);
   if (copy > buflen)
     copy = buflen;


@@ -131,7 +112,7 @@ sb_scrub_and_add_sb (sb *ptr, sb *s)
 {
   sb_to_scrub = s;
   scrub_position = s->ptr;
 {
   sb_to_scrub = s;
   scrub_position = s->ptr;

-  
+

   sb_check (ptr, s->len);
   ptr->len += do_scrub_chars (scrub_from_sb, ptr->ptr + ptr->len, s->len);
 
   sb_check (ptr, s->len);
   ptr->len += do_scrub_chars (scrub_from_sb, ptr->ptr + ptr->len, s->len);
 


@@ -143,19 +124,30 @@ sb_scrub_and_add_sb (sb *ptr, sb *s)
    and grow it if it doesn't.  */
 
 static void
    and grow it if it doesn't.  */
 
 static void

-sb_check (sb *ptr, int len)
+sb_check (sb *ptr, size_t len)

 {
 {

-  if (ptr->len + len >= 1 << ptr->pot)
+  size_t want = ptr->len + len;
+
+  if (want > ptr->max)

     {
     {

-      sb tmp;
-      int pot = ptr->pot;
-
-      while (ptr->len + len >= 1 << pot)
-       pot++;
-      sb_build (&tmp, pot);
-      sb_add_sb (&tmp, ptr);
-      sb_kill (ptr);
-      *ptr = tmp;
+      size_t max;
+
+      want += MALLOC_OVERHEAD + 1;
+      if ((ssize_t) want < 0)
+       as_fatal ("string buffer overflow");
+#if GCC_VERSION >= 3004
+      max = (size_t) 1 << (CHAR_BIT * sizeof (want)
+                          - (sizeof (want) <= sizeof (long)
+                             ? __builtin_clzl ((long) want)
+                             : __builtin_clzll ((long long) want)));
+#else
+      max = 128;
+      while (want > max)
+       max <<= 1;
+#endif
+      max -= MALLOC_OVERHEAD + 1;
+      ptr->max = max;
+      ptr->ptr = XRESIZEVEC (char, ptr->ptr, max + 1);

     }
 }
 
     }
 }
 


@@ -170,7 +162,7 @@ sb_reset (sb *ptr)
 /* Add character c to the end of the sb at ptr.  */
 
 void
 /* Add character c to the end of the sb at ptr.  */
 
 void

-sb_add_char (sb *ptr, int c)
+sb_add_char (sb *ptr, size_t c)

 {
   sb_check (ptr, 1);
   ptr->ptr[ptr->len++] = c;
 {
   sb_check (ptr, 1);
   ptr->ptr[ptr->len++] = c;


@@ -181,7 +173,7 @@ sb_add_char (sb *ptr, int c)
 void
 sb_add_string (sb *ptr, const char *s)
 {
 void
 sb_add_string (sb *ptr, const char *s)
 {

-  int len = strlen (s);
+  size_t len = strlen (s);

   sb_check (ptr, len);
   memcpy (ptr->ptr + ptr->len, s, len);
   ptr->len += len;
   sb_check (ptr, len);
   memcpy (ptr->ptr + ptr->len, s, len);
   ptr->len += len;


@@ -190,28 +182,27 @@ sb_add_string (sb *ptr, const char *s)
 /* Add string at s of length len to sb at ptr */
 
 void
 /* Add string at s of length len to sb at ptr */
 
 void

-sb_add_buffer (sb *ptr, const char *s, int len)
+sb_add_buffer (sb *ptr, const char *s, size_t len)

 {
   sb_check (ptr, len);
   memcpy (ptr->ptr + ptr->len, s, len);
   ptr->len += len;
 }
 
 {
   sb_check (ptr, len);
   memcpy (ptr->ptr + ptr->len, s, len);
   ptr->len += len;
 }
 

-/* Like sb_name, but don't include the null byte in the string.  */
+/* Write terminating NUL and return string.  */

 
 char *
 sb_terminate (sb *in)
 {
 
 char *
 sb_terminate (sb *in)
 {

-  sb_add_char (in, 0);
-  --in->len;
+  in->ptr[in->len] = 0;

   return in->ptr;
 }
 
 /* Start at the index idx into the string in sb at ptr and skip
    whitespace. return the index of the first non whitespace character.  */
 
   return in->ptr;
 }
 
 /* Start at the index idx into the string in sb at ptr and skip
    whitespace. return the index of the first non whitespace character.  */
 

-int
-sb_skip_white (int idx, sb *ptr)
+size_t
+sb_skip_white (size_t idx, sb *ptr)

 {
   while (idx < ptr->len
         && (ptr->ptr[idx] == ' '
 {
   while (idx < ptr->len
         && (ptr->ptr[idx] == ' '


@@ -224,8 +215,8 @@ sb_skip_white (int idx, sb *ptr)
    a comma and any following whitespace. returns the index of the
    next character.  */
 
    a comma and any following whitespace. returns the index of the
    next character.  */
 

-int
-sb_skip_comma (int idx, sb *ptr)
+size_t
+sb_skip_comma (size_t idx, sb *ptr)

 {
   while (idx < ptr->len
         && (ptr->ptr[idx] == ' '
 {
   while (idx < ptr->len
         && (ptr->ptr[idx] == ' '