[PATCH 1/2] [MIPS] Apply ASE information for the selected processor

[Faraz Shahbazker]

From: Matthew Fortune <matthew.fortune@mips.com>

GAS does not enable implicit ASEs for most MIPS processors.
The rework of option handling done as part of .module implementation
left the implicit ASE logic broken and default enabled ASEs for
most processors did not get applied.  This patch ensures the ASE
information is carried forward to the point where it is required.

gas/
	* config/tc-mips.c (mips_set_options) <init_ase>: New field.
	(file_mips_opts, mips_opts) <init_ase>: Initialize new field.
	(file_mips_check_options): Track and propagate the initial ASE
	settings for a CPU.
	* testsuite/gas/mips/elf_mach_p6600.d: New test.
	* testsuite/gas/mips/mips.exp: Run the new test.
---
 gas/config/tc-mips.c                    | 22 +++++++++++++++-------
 gas/testsuite/gas/mips/elf_mach_p6600.d | 23 +++++++++++++++++++++++
 gas/testsuite/gas/mips/mips.exp         |  1 +
 3 files changed, 39 insertions(+), 7 deletions(-)
 create mode 100644 gas/testsuite/gas/mips/elf_mach_p6600.d

diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c
index 81b729a..45e8f38 100644
--- a/gas/config/tc-mips.c
+++ b/gas/config/tc-mips.c
@@ -268,6 +268,12 @@ struct mips_set_options
   /* 1 if single-precision operations on odd-numbered registers are
      allowed.  */
   int oddspreg;
+
+  /* The set of ASEs that should be enabled for the user specified
+     architecture.  This cannot be inferred from 'arch' for all cores
+     as processors only have a unique 'arch' if they add architecture
+     specific instructions (UDI).  */
+  int init_ase;
 };
 
 /* Specifies whether module level options have been checked yet.  */
@@ -289,7 +295,8 @@ static struct mips_set_options file_mips_opts =
   /* noreorder */ 0,  /* at */ ATREG, /* warn_about_macros */ 0,
   /* nomove */ 0, /* nobopt */ 0, /* noautoextend */ 0, /* insn32 */ FALSE,
   /* gp */ -1, /* fp */ -1, /* arch */ CPU_UNKNOWN, /* sym32 */ FALSE,
-  /* soft_float */ FALSE, /* single_float */ FALSE, /* oddspreg */ -1
+  /* soft_float */ FALSE, /* single_float */ FALSE, /* oddspreg */ -1,
+  /* init_ase */ 0
 };
 
 /* This is similar to file_mips_opts, but for the current set of options.  */
@@ -300,7 +307,8 @@ static struct mips_set_options mips_opts =
   /* noreorder */ 0,  /* at */ ATREG, /* warn_about_macros */ 0,
   /* nomove */ 0, /* nobopt */ 0, /* noautoextend */ 0, /* insn32 */ FALSE,
   /* gp */ -1, /* fp */ -1, /* arch */ CPU_UNKNOWN, /* sym32 */ FALSE,
-  /* soft_float */ FALSE, /* single_float */ FALSE, /* oddspreg */ -1
+  /* soft_float */ FALSE, /* single_float */ FALSE, /* oddspreg */ -1,
+  /* init_ase */ 0
 };
 
 /* Which bits of file_ase were explicitly set or cleared by ASE options.  */
@@ -4086,8 +4094,6 @@ mips_check_options (struct mips_set_options *opts, bfd_boolean abi_checks)
 static void
 file_mips_check_options (void)
 {
-  const struct mips_cpu_info *arch_info = 0;
-
   if (file_mips_opts_checked)
     return;
 
@@ -4130,8 +4136,6 @@ file_mips_check_options (void)
 	file_mips_opts.fp = 32;
     }
 
-  arch_info = mips_cpu_info_from_arch (file_mips_opts.arch);
-
   /* Disable operations on odd-numbered floating-point registers by default
      when using the FPXX ABI.  */
   if (file_mips_opts.oddspreg < 0)
@@ -4175,7 +4179,7 @@ file_mips_check_options (void)
 
   /* If the user didn't explicitly select or deselect a particular ASE,
      use the default setting for the CPU.  */
-  file_mips_opts.ase |= (arch_info->ase & ~file_ase_explicit);
+  file_mips_opts.ase |= (file_mips_opts.init_ase & ~file_ase_explicit);
 
   /* Set up the current options.  These may change throughout assembly.  */
   mips_opts = file_mips_opts;
@@ -15189,6 +15193,7 @@ mips_after_parse_args (void)
 
   file_mips_opts.arch = arch_info->cpu;
   file_mips_opts.isa = arch_info->isa;
+  file_mips_opts.init_ase = arch_info->ase;
 
   /* Set up initial mips_opts state.  */
   mips_opts = file_mips_opts;
@@ -16559,6 +16564,7 @@ parse_code_option (char * name)
 	      mips_opts.arch = p->cpu;
 	      mips_opts.isa = p->isa;
 	      isa_set = TRUE;
+	      mips_opts.init_ase = p->ase;
 	    }
 	}
       else if (strncmp (name, "mips", 4) == 0)
@@ -16573,6 +16579,7 @@ parse_code_option (char * name)
 	      mips_opts.arch = p->cpu;
 	      mips_opts.isa = p->isa;
 	      isa_set = TRUE;
+	      mips_opts.init_ase = p->ase;
 	    }
 	}
       else
@@ -16646,6 +16653,7 @@ s_mipsset (int x ATTRIBUTE_UNUSED)
     {
       mips_opts.isa = file_mips_opts.isa;
       mips_opts.arch = file_mips_opts.arch;
+      mips_opts.init_ase = file_mips_opts.init_ase;
       mips_opts.gp = file_mips_opts.gp;
       mips_opts.fp = file_mips_opts.fp;
     }
diff --git a/gas/testsuite/gas/mips/elf_mach_p6600.d b/gas/testsuite/gas/mips/elf_mach_p6600.d
new file mode 100644
index 0000000..a977d3b
--- /dev/null
+++ b/gas/testsuite/gas/mips/elf_mach_p6600.d
@@ -0,0 +1,23 @@
+#readelf: -Ah
+#name: ELF p6600 markings
+#as: -64 -march=p6600
+#source: empty.s
+
+ELF Header:
+#...
+  Flags: +0xa......., .*mips64r6.*
+#...
+
+MIPS ABI Flags Version: 0
+
+ISA: MIPS64r6
+GPR size: 64
+CPR1 size: 128
+CPR2 size: 0
+FP ABI: .*
+ISA Extension: None
+ASEs:
+	VZ ASE
+	MSA ASE
+FLAGS 1: .*
+FLAGS 2: .*
diff --git a/gas/testsuite/gas/mips/mips.exp b/gas/testsuite/gas/mips/mips.exp
index a009c6e..5969c59 100644
--- a/gas/testsuite/gas/mips/mips.exp
+++ b/gas/testsuite/gas/mips/mips.exp
@@ -1151,6 +1151,7 @@ if { [istarget mips*-*-vxworks*] } {
     # Verify that machine markings are handled properly.
     run_dump_test "elf_mach_5900"
     run_dump_test "elf_mach_interaptiv-mr2"
+    run_dump_test "elf_mach_p6600"
 
     run_dump_test "mips-gp32-fp32-pic"
     run_dump_test "mips-gp32-fp64-pic"
-- 
2.9.5