i386: Align branches within a fixed boundary

[deliverable/binutils-gdb.git] / gas / ChangeLog

diff --git a/gas/ChangeLog b/gas/ChangeLog
index ef7369cee9efa04192ee82522cdd74292423cdb0..7b83a0abd13cebb2afc17ff7ddad02b67b27ee5e 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,63 @@
+2019-12-12  H.J. Lu  <hongjiu.lu@intel.com>
+
+       * config/tc-i386.c (_i386_insn): Add has_gotpc_tls_reloc.
+       (tls_get_addr): New.
+       (last_insn): New.
+       (align_branch_power): New.
+       (align_branch_kind): New.
+       (align_branch_bit): New.
+       (align_branch): New.
+       (MAX_FUSED_JCC_PADDING_SIZE): New.
+       (align_branch_prefix_size): New.
+       (BRANCH_PADDING): New.
+       (BRANCH_PREFIX): New.
+       (FUSED_JCC_PADDING): New.
+       (i386_generate_nops): Support BRANCH_PADDING and FUSED_JCC_PADDING.
+       (md_begin): Abort if align_branch_prefix_size <
+       MAX_FUSED_JCC_PADDING_SIZE.
+       (md_assemble): Set last_insn.
+       (maybe_fused_with_jcc_p): New.
+       (add_fused_jcc_padding_frag_p): New.
+       (add_branch_prefix_frag_p): New.
+       (add_branch_padding_frag_p): New.
+       (output_insn): Generate a BRANCH_PADDING, FUSED_JCC_PADDING or
+       BRANCH_PREFIX frag and terminate each frag to align branches.
+       (output_disp): Set i.has_gotpc_tls_reloc to TRUE for GOTPC and
+       relaxable TLS relocations.
+       (output_imm): Likewise.
+       (i386_next_non_empty_frag): New.
+       (i386_next_jcc_frag): New.
+       (i386_classify_machine_dependent_frag): New.
+       (i386_branch_padding_size): New.
+       (i386_generic_table_relax_frag): New.
+       (md_estimate_size_before_relax): Handle COND_JUMP_PADDING,
+       FUSED_JCC_PADDING and COND_JUMP_PREFIX frags.
+       (md_convert_frag): Handle BRANCH_PADDING, BRANCH_PREFIX and
+       FUSED_JCC_PADDING frags.
+       (OPTION_MALIGN_BRANCH_BOUNDARY): New.
+       (OPTION_MALIGN_BRANCH_PREFIX_SIZE): New.
+       (OPTION_MALIGN_BRANCH): New.
+       (md_longopts): Add -malign-branch-boundary=,
+       -malign-branch-prefix-size= and -malign-branch=.
+       (md_parse_option): Handle -malign-branch-boundary=,
+       -malign-branch-prefix-size= and -malign-branch=.
+       (md_show_usage): Display -malign-branch-boundary=,
+       -malign-branch-prefix-size= and -malign-branch=.
+       (i386_target_format): Set tls_get_addr.
+       (i386_cons_align): New.
+       * config/tc-i386.h (i386_cons_align): New.
+       (md_cons_align): New.
+       (i386_generic_table_relax_frag): New.
+       (md_generic_table_relax_frag): New.
+       (i386_tc_frag_data): Add u, padding_address, length,
+       max_prefix_length, prefix_length, default_prefix, cmp_size,
+       classified and branch_type.
+       (TC_FRAG_INIT): Initialize u, padding_address, length,
+       max_prefix_length, prefix_length, default_prefix, cmp_size,
+       classified and branch_type.
+       * doc/c-i386.texi: Document -malign-branch-boundary=,
+       -malign-branch= and -malign-branch-prefix-size=.
+
 2019-12-12  H.J. Lu  <hongjiu.lu@intel.com>
 
        * write.c (md_generic_table_relax_frag): New.  Defined to