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-rw-r--r--gas/ChangeLog13
-rw-r--r--gas/config/tc-xtensa.c221
2 files changed, 207 insertions, 27 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog
index 986f009..13b6705 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,16 @@
+2015-05-02 Max Filippov <jcmvbkbc@gmail.com>
+
+ * config/tc-xtensa.c (cached_fixupS, fixup_cacheS): New typedefs.
+ (struct cached_fixup, struct fixup_cache): New structures.
+ (fixup_order, xtensa_make_cached_fixup),
+ (xtensa_realloc_fixup_cache, xtensa_cache_relaxable_fixups),
+ (xtensa_find_first_cached_fixup, xtensa_delete_cached_fixup),
+ (xtensa_add_cached_fixup): New functions.
+ (xtensa_relax_frag): Cache fixups pointing at potentially
+ oversized jumps at the beginning of every relaxation pass. Only
+ check subset of this cache in the reach of single jump from the
+ trampoline frag currently being relaxed.
+
2015-05-01 Nick Clifton <nickc@redhat.com>
* config/rl78-parse.y (MULU): Remove ISA_G14.
diff --git a/gas/config/tc-xtensa.c b/gas/config/tc-xtensa.c
index 3e85b69..b1827fa 100644
--- a/gas/config/tc-xtensa.c
+++ b/gas/config/tc-xtensa.c
@@ -8785,6 +8785,154 @@ static long relax_frag_for_align (fragS *, long);
static long relax_frag_immed
(segT, fragS *, long, int, xtensa_format, int, int *, bfd_boolean);
+typedef struct cached_fixup cached_fixupS;
+struct cached_fixup
+{
+ int addr;
+ int target;
+ int delta;
+ fixS *fixP;
+};
+
+typedef struct fixup_cache fixup_cacheS;
+struct fixup_cache
+{
+ cached_fixupS *fixups;
+ unsigned n_fixups;
+ unsigned n_max;
+
+ segT seg;
+ fragS *first_frag;
+};
+
+static int fixup_order (const void *a, const void *b)
+{
+ const cached_fixupS *pa = a;
+ const cached_fixupS *pb = b;
+
+ if (pa->addr == pb->addr)
+ {
+ if (pa->target == pb->target)
+ {
+ if (pa->fixP->fx_r_type == pb->fixP->fx_r_type)
+ return 0;
+ return pa->fixP->fx_r_type < pb->fixP->fx_r_type ? -1 : 1;
+ }
+ return pa->target - pb->target;
+ }
+ return pa->addr - pb->addr;
+}
+
+static bfd_boolean xtensa_make_cached_fixup (cached_fixupS *o, fixS *fixP)
+{
+ xtensa_isa isa = xtensa_default_isa;
+ int addr = fixP->fx_frag->fr_address;
+ int target;
+ int delta;
+ symbolS *s = fixP->fx_addsy;
+ int slot;
+ xtensa_format fmt;
+ xtensa_opcode opcode;
+
+ if (fixP->fx_r_type < BFD_RELOC_XTENSA_SLOT0_OP ||
+ fixP->fx_r_type > BFD_RELOC_XTENSA_SLOT14_OP)
+ return FALSE;
+ target = S_GET_VALUE (s);
+ delta = target - addr;
+
+ if (abs(delta) < J_RANGE / 2)
+ return FALSE;
+
+ xtensa_insnbuf_from_chars (isa, trampoline_buf,
+ (unsigned char *) fixP->fx_frag->fr_literal +
+ fixP->fx_where, 0);
+ fmt = xtensa_format_decode (isa, trampoline_buf);
+ gas_assert (fmt != XTENSA_UNDEFINED);
+ slot = fixP->tc_fix_data.slot;
+ xtensa_format_get_slot (isa, fmt, slot, trampoline_buf, trampoline_slotbuf);
+ opcode = xtensa_opcode_decode (isa, fmt, slot, trampoline_slotbuf);
+ if (opcode != xtensa_j_opcode)
+ return FALSE;
+
+ o->addr = addr;
+ o->target = target;
+ o->delta = delta;
+ o->fixP = fixP;
+
+ return TRUE;
+}
+
+static void xtensa_realloc_fixup_cache (fixup_cacheS *cache, unsigned add)
+{
+ if (cache->n_fixups + add > cache->n_max)
+ {
+ cache->n_max = (cache->n_fixups + add) * 2;
+ cache->fixups = xrealloc (cache->fixups,
+ sizeof (*cache->fixups) * cache->n_max);
+ }
+}
+
+static void xtensa_cache_relaxable_fixups (fixup_cacheS *cache,
+ segment_info_type *seginfo)
+{
+ fixS *fixP;
+
+ cache->n_fixups = 0;
+
+ for (fixP = seginfo->fix_root; fixP ; fixP = fixP->fx_next)
+ {
+ xtensa_realloc_fixup_cache (cache, 1);
+
+ if (xtensa_make_cached_fixup (cache->fixups + cache->n_fixups, fixP))
+ ++cache->n_fixups;
+ }
+ qsort (cache->fixups, cache->n_fixups, sizeof (*cache->fixups), fixup_order);
+}
+
+static unsigned xtensa_find_first_cached_fixup (const fixup_cacheS *cache,
+ int addr)
+{
+ unsigned a = 0;
+ unsigned b = cache->n_fixups;
+
+ while (b - a > 1)
+ {
+ unsigned c = (a + b) / 2;
+
+ if (cache->fixups[c].addr < addr)
+ a = c;
+ else
+ b = c;
+ }
+ return a;
+}
+
+static void xtensa_delete_cached_fixup (fixup_cacheS *cache, unsigned i)
+{
+ memmove (cache->fixups + i, cache->fixups + i + 1,
+ (cache->n_fixups - i - 1) * sizeof (*cache->fixups));
+ --cache->n_fixups;
+}
+
+static bfd_boolean xtensa_add_cached_fixup (fixup_cacheS *cache, fixS *fixP)
+{
+ cached_fixupS o;
+ unsigned i;
+
+ if (!xtensa_make_cached_fixup (&o, fixP))
+ return FALSE;
+ xtensa_realloc_fixup_cache (cache, 1);
+ i = xtensa_find_first_cached_fixup (cache, o.addr);
+ if (i < cache->n_fixups)
+ {
+ ++i;
+ memmove (cache->fixups + i + 1, cache->fixups + i,
+ (cache->n_fixups - i) * sizeof (*cache->fixups));
+ }
+ cache->fixups[i] = o;
+ ++cache->n_fixups;
+ return TRUE;
+}
/* Return the number of bytes added to this fragment, given that the
input has been stretched already by "stretch". */
@@ -8896,35 +9044,43 @@ xtensa_relax_frag (fragS *fragP, long stretch, int *stretched_p)
case RELAX_TRAMPOLINE:
if (fragP->tc_frag_data.relax_seen)
{
- segment_info_type *seginfo = seg_info (now_seg);
- fragS *fP; /* The out-of-range jump. */
- fixS *fixP;
+ static fixup_cacheS fixup_cache;
+ segment_info_type *seginfo = seg_info (now_seg);
+ int trampaddr = fragP->fr_address + fragP->fr_fix;
+ int searchaddr = trampaddr < J_RANGE ? 0 : trampaddr - J_RANGE;
+ unsigned i;
+
+ if (now_seg != fixup_cache.seg ||
+ fragP == fixup_cache.first_frag ||
+ fixup_cache.first_frag == NULL)
+ {
+ xtensa_cache_relaxable_fixups (&fixup_cache, seginfo);
+ fixup_cache.seg = now_seg;
+ fixup_cache.first_frag = fragP;
+ }
/* Scan for jumps that will not reach. */
- for (fixP = seginfo->fix_root; fixP ; fixP = fixP->fx_next)
+ for (i = xtensa_find_first_cached_fixup (&fixup_cache, searchaddr);
+ i < fixup_cache.n_fixups; ++i)
+
{
- symbolS *s = fixP->fx_addsy;
- xtensa_opcode opcode;
- int target;
- int addr;
- int delta;
-
- if (fixP->fx_r_type < BFD_RELOC_XTENSA_SLOT0_OP ||
- fixP->fx_r_type > BFD_RELOC_XTENSA_SLOT14_OP)
- continue;
- xtensa_insnbuf_from_chars (isa, trampoline_buf,
- (unsigned char *) fixP->fx_frag->fr_literal + fixP->fx_where,
- 0);
- fmt = xtensa_format_decode (isa, trampoline_buf);
- gas_assert (fmt != XTENSA_UNDEFINED);
- slot = fixP->tc_fix_data.slot;
- xtensa_format_get_slot (isa, fmt, slot, trampoline_buf, trampoline_slotbuf);
- opcode = xtensa_opcode_decode (isa, fmt, slot, trampoline_slotbuf);
- if (opcode != xtensa_j_opcode)
+ fixS *fixP = fixup_cache.fixups[i].fixP;
+ int target = fixup_cache.fixups[i].target;
+ int addr = fixup_cache.fixups[i].addr;
+ int delta = fixup_cache.fixups[i].delta + stretch;
+
+ trampaddr = fragP->fr_address + fragP->fr_fix;
+
+ if ((addr + J_RANGE < trampaddr) ||
+ abs (addr - trampaddr) < J_RANGE / 2)
continue;
- target = S_GET_VALUE (s);
- addr = fixP->fx_frag->fr_address;
- delta = target - addr + stretch;
+ if (addr > trampaddr + J_RANGE)
+ break;
+ if (abs (delta) < J_RANGE)
+ continue;
+
+ slot = fixP->tc_fix_data.slot;
+
if (delta > J_RANGE || delta < -1 * J_RANGE)
{ /* Found an out-of-range jump; scan the list of trampolines for the best match. */
struct trampoline_seg *ts = find_trampoline_seg (now_seg);
@@ -8978,14 +9134,13 @@ xtensa_relax_frag (fragS *fragP, long stretch, int *stretched_p)
}
if (tf->fragP == fragP)
{
- int trampaddr = fragP->fr_address + fragP->fr_fix;
-
if (abs (addr - trampaddr) < J_RANGE)
{ /* The trampoline is in range of original; fix it! */
fixS *newfixP;
int offset;
TInsn insn;
symbolS *lsym;
+ fragS *fP; /* The out-of-range jump. */
new_stretch += init_trampoline_frag (tf);
offset = fragP->fr_fix; /* Where to assemble the j insn. */
@@ -9009,10 +9164,20 @@ xtensa_relax_frag (fragS *fragP, long stretch, int *stretched_p)
newfixP->tc_fix_data.X_add_symbol = lsym;
newfixP->tc_fix_data.X_add_number = offset;
newfixP->tc_fix_data.slot = slot;
+
+ xtensa_delete_cached_fixup (&fixup_cache, i);
+ xtensa_add_cached_fixup (&fixup_cache, newfixP);
+
/* Move the fix-up from the original j insn to this one. */
fixP->fx_frag = fragP;
fixP->fx_where = fragP->fr_fix - 3;
fixP->tc_fix_data.slot = 0;
+
+ xtensa_add_cached_fixup (&fixup_cache, fixP);
+
+ /* re-do current fixup */
+ --i;
+
/* Adjust the jump around this trampoline (if present). */
if (tf->fixP != NULL)
{
@@ -9027,6 +9192,8 @@ xtensa_relax_frag (fragS *fragP, long stretch, int *stretched_p)
fragP->fr_subtype = 0;
/* Remove from the trampoline_list. */
prev->next = tf->next;
+ if (fragP == fixup_cache.first_frag)
+ fixup_cache.first_frag = NULL;
break;
}
}
generated by cgit v1.1 at 2024-12-15 07:44:20 +0000