From 262935666bb35e3434a4708262c6e5e120a5df12 Mon Sep 17 00:00:00 2001
From: Eric Botcazou <ebotcazou@gcc.gnu.org>
Date: Feb 07 2019 16:12:43 +0000
Subject: Visium: align branch absolute instruction for the GR6


This is done in order to avoid a pipeline hazard on the GR6.

gas/
	* config/tc-visium.c (md_assemble) <mode_cad>: Align instruction
	on 64-bit boundaries for the GR6.
	* testsuite/gas/visium/allinsn_gr6.s: Tweak.
	* testsuite/gas/visium/allinsn_gr6.d: Likewise.
	* testsuite/gas/visium/bra-1.d: New test.
	* testsuite/gas/visium/bra-1.s: Likewise.
	* testsuite/gas/visium/visium.exp: Run bra-1 test.

---

diff --git a/gas/ChangeLog b/gas/ChangeLog
index d923a2c..0e00437 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,13 @@
+2019-02-07  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* config/tc-visium.c (md_assemble) <mode_cad>: Align instruction on
+	64-bit boundaries for the GR6.
+	* testsuite/gas/visium/allinsn_gr6.s: Tweak.
+	* testsuite/gas/visium/allinsn_gr6.d: Likewise.
+	* testsuite/gas/visium/bra-1.d: New test.
+	* testsuite/gas/visium/bra-1.s: Likewise.
+	* testsuite/gas/visium/visium.exp: Run bra-1 test.
+
 2018-12-09  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR gas/23968
diff --git a/gas/config/tc-visium.c b/gas/config/tc-visium.c
index 0bcb6e3..409ea99 100644
--- a/gas/config/tc-visium.c
+++ b/gas/config/tc-visium.c
@@ -1368,6 +1368,10 @@ md_assemble (char *str0)
       if (previous_mode == mode_cad || previous_mode == mode_ci)
 	as_bad ("branch instruction in delay slot");
 
+      /* For the GR6, BRA insns must be aligned on 64-bit boundaries.  */
+      if (visium_arch == VISIUM_ARCH_GR6)
+	do_align (3, NULL, 0, 0);
+
       this_dest = r3;
       condition_code = cc;
       break;
diff --git a/gas/testsuite/gas/visium/allinsn_gr6.d b/gas/testsuite/gas/visium/allinsn_gr6.d
index bb198ec..c7f627b 100644
--- a/gas/testsuite/gas/visium/allinsn_gr6.d
+++ b/gas/testsuite/gas/visium/allinsn_gr6.d
@@ -86,10 +86,10 @@ Disassembly of section .text:
  120:	06 a5 1a 02 	asr.w   r6,r5,0
  124:	86 a5 1a 12 	asr.w   r6,r5,1
  128:	86 a7 23 f1 	asr.b   r8,r7,31
- 12c:	0f 89 28 04 	bra     eq,r9,r10
- 130:	07 a0 00 04 	rflag   r0
- 134:	af 87 04 04 	bra     ne,r7,r1
- 138:	07 e0 ae 04 	readmda r11
+ 12c:	07 a0 00 04 	rflag   r0
+ 130:	0f 89 28 04 	bra     eq,r9,r10
+ 134:	07 e0 ae 04 	readmda r11
+ 138:	af 87 04 04 	bra     ne,r7,r1
  13c:	07 e0 b3 f4 	eamread r12,31
  140:	87 cd 30 04 	extb.l  r12,r13
  144:	87 cf 38 02 	extb.w  r14,r15
@@ -130,8 +130,8 @@ Disassembly of section .text:
  1d0:	84 a7 7f ff 	moviu   r7,0x7FFF
  1d4:	04 c6 00 01 	moviq   r6,1
  1d8:	84 47 ff ff 	subi    r7,65535
- 1dc:	ff 86 00 04 	bra     tr,r6,r0
- 1e0:	86 00 00 04 	add.l   r0,r0,r0
+ 1dc:	86 00 00 04 	add.l   r0,r0,r0
+ 1e0:	ff 86 00 04 	bra     tr,r6,r0
  1e4:	d3 e3 84 5c 	fpinst  10,f1,f3,f5
  1e8:	db e4 88 6c 	fpinst  11,f2,f4,f6
  1ec:	7b ed ac fc 	fpinst  15,f11,f13,f15
diff --git a/gas/testsuite/gas/visium/allinsn_gr6.s b/gas/testsuite/gas/visium/allinsn_gr6.s
index 32953fb..11006b8 100644
--- a/gas/testsuite/gas/visium/allinsn_gr6.s
+++ b/gas/testsuite/gas/visium/allinsn_gr6.s
@@ -93,11 +93,10 @@ sreg:
 	asr.w	r6,r5,1
 	asr.b	r8,r7,31
 
-	bra	eq,r9,r10
 	rflag	r0
-	bra	ne,r7,r1
-
+	bra	eq,r9,r10
 	eamread	r11,0
+	bra	ne,r7,r1
 	eamread	r12,31
 
 	extb.l	r12,r13
@@ -151,8 +150,8 @@ sreg:
 	moviq	r6,1
 	subi	r7,65535
 
-	bra	tr,r6,r0
 	add.l	r0,r0,r0
+	bra	tr,r6,r0
 
 
 	fpinst	10,f1,f3,f5
diff --git a/gas/testsuite/gas/visium/bra-1.d b/gas/testsuite/gas/visium/bra-1.d
new file mode 100644
index 0000000..483b36b
--- /dev/null
+++ b/gas/testsuite/gas/visium/bra-1.d
@@ -0,0 +1,12 @@
+#as: -mtune=gr6
+#objdump: -d
+#name: bra-1
+
+.*: +file format .*
+
+Disassembly of section .text:
+
+00000000 <foo>:
+	...
+   8:	ff 95 54 04 	bra     tr,r21,r21
+   c:	00 00 00 00 	nop
diff --git a/gas/testsuite/gas/visium/bra-1.s b/gas/testsuite/gas/visium/bra-1.s
new file mode 100644
index 0000000..11544b8
--- /dev/null
+++ b/gas/testsuite/gas/visium/bra-1.s
@@ -0,0 +1,5 @@
+        .text
+foo:
+	nop
+	bra tr,r21,r21
+	 nop
diff --git a/gas/testsuite/gas/visium/visium.exp b/gas/testsuite/gas/visium/visium.exp
index 1451d58..6597284 100644
--- a/gas/testsuite/gas/visium/visium.exp
+++ b/gas/testsuite/gas/visium/visium.exp
@@ -24,6 +24,7 @@ if [istarget visium-*-*] {
     run_dump_test "allinsn_def"
     run_dump_test "allinsn_gr5"
     run_dump_test "allinsn_gr6"
+    run_dump_test "bra-1"
     run_dump_test "brr-1"
     run_dump_test "brr-2"
     run_dump_test "high-1"