[PATCH] gas: arm: Fix IT-predicated MVE vcvt

	* config/tc-arm.c (do_neon_cvt_1): Parse vcvtne as vcvt-ne for
	NS_FD shape when MVE is present
	* testsuite/gas/arm/mve-vcvtne-it-bad.d: New test.
	* testsuite/gas/arm/mve-vcvtne-it-bad.l: New test.
	* testsuite/gas/arm/mve-vcvtne-it-bad.s: New test.
	* testsuite/gas/arm/mve-vcvtne-it.d: New test.
	* testsuite/gas/arm/mve-vcvtne-it.s: New test.

diff --git a/gas/ChangeLog b/gas/ChangeLog
index fecc1e37ea6f18c5457dd7cdf725a3ce34ec6077..baa788f4fed06339923ed0b8b9dab6e9efef9b79 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,13 @@
+2020-08-12  Joe Ramsay  <joe.ramsay@.arm.com>
+
+       * config/tc-arm.c (do_neon_cvt_1): Parse vcvtne as vcvt-ne for
+       NS_FD shape when MVE is present
+       * testsuite/gas/arm/mve-vcvtne-it-bad.d: New test.
+       * testsuite/gas/arm/mve-vcvtne-it-bad.l: New test.
+       * testsuite/gas/arm/mve-vcvtne-it-bad.s: New test.
+       * testsuite/gas/arm/mve-vcvtne-it.d: New test.
+       * testsuite/gas/arm/mve-vcvtne-it.s: New test.
+
 2020-08-12  Alex Coplan  <alex.coplan@arm.com>
 
        * testsuite/gas/aarch64/mpam-bad.d: New test.

diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index 5877847c3b90c0042ba432b95cdd939266a24d1e..25559216fc34a68d946f315f2f0092dce3058726 100644 (file)
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -19087,6 +19087,16 @@ do_neon_cvt_1 (enum neon_cvt_mode mode)
       return;
     }
 
+  if ((rs == NS_FD || rs == NS_QQI) && mode == neon_cvt_mode_n
+      && ARM_CPU_HAS_FEATURE (cpu_variant, mve_ext))
+    {
+      /* We are dealing with vcvt with the 'ne' condition.  */
+      inst.cond = 0x1;
+      inst.instruction = N_MNEM_vcvt;
+      do_neon_cvt_1 (neon_cvt_mode_z);
+      return;
+    }
+
   /* VFP rather than Neon conversions.  */
   if (flavour >= neon_cvt_flavour_first_fp)
     {
@@ -19115,14 +19125,6 @@ do_neon_cvt_1 (enum neon_cvt_mode mode)
                                             NEON_CHECK_CC | NEON_CHECK_ARCH))
            return;
        }
-      else if (mode == neon_cvt_mode_n)
-       {
-         /* We are dealing with vcvt with the 'ne' condition.  */
-         inst.cond = 0x1;
-         inst.instruction = N_MNEM_vcvt;
-         do_neon_cvt_1 (neon_cvt_mode_z);
-         return;
-       }
       /* fall through.  */
     case NS_DDI:
       {

diff --git a/gas/testsuite/gas/arm/mve-vcvtne-it-bad.d b/gas/testsuite/gas/arm/mve-vcvtne-it-bad.d
new file mode 100644 (file)
index 0000000..110f45f
--- /dev/null
+++ b/gas/testsuite/gas/arm/mve-vcvtne-it-bad.d
@@ -0,0 +1,5 @@
+# name: MVE vcvtne instruction outside of IT block
+# as: -march=armv8.1-m.main+mve.fp+fp.dp
+# error_output: mve-vcvtne-it-bad.l
+
+.*: +file format .*arm.*

diff --git a/gas/testsuite/gas/arm/mve-vcvtne-it-bad.l b/gas/testsuite/gas/arm/mve-vcvtne-it-bad.l
new file mode 100644 (file)
index 0000000..8765ae0
--- /dev/null
+++ b/gas/testsuite/gas/arm/mve-vcvtne-it-bad.l
@@ -0,0 +1,2 @@
+[^:]*: Assembler messages:
+[^:]*:3: Error: thumb conditional instruction should be in IT block -- `vcvtne.s32.f64 s13,d8'

diff --git a/gas/testsuite/gas/arm/mve-vcvtne-it-bad.s b/gas/testsuite/gas/arm/mve-vcvtne-it-bad.s
new file mode 100644 (file)
index 0000000..e4c1b99
--- /dev/null
+++ b/gas/testsuite/gas/arm/mve-vcvtne-it-bad.s
@@ -0,0 +1,3 @@
+.syntax unified
+.text
+vcvtne.s32.f64 s13, d8

diff --git a/gas/testsuite/gas/arm/mve-vcvtne-it.d b/gas/testsuite/gas/arm/mve-vcvtne-it.d
new file mode 100644 (file)
index 0000000..b376a98
--- /dev/null
+++ b/gas/testsuite/gas/arm/mve-vcvtne-it.d
@@ -0,0 +1,9 @@
+# name: Armv8.1-M Mainline vcvt instruction in it block (with MVE)
+# as: -march=armv8.1-m.main+mve.fp+fp.dp
+# objdump: -dr --prefix-addresses --show-raw-insn -marmv8.1-m.main
+
+.*: +file format .*arm.*
+
+Disassembly of section .text:
+^[^>]*> bf18[  ]+it[   ]+ne
+^[^>]*> eefd 6bc8[     ]+vcvtne.s32.f64[       ]+s13, d8
\ No newline at end of file

diff --git a/gas/testsuite/gas/arm/mve-vcvtne-it.s b/gas/testsuite/gas/arm/mve-vcvtne-it.s
new file mode 100644 (file)
index 0000000..a9f2606
--- /dev/null
+++ b/gas/testsuite/gas/arm/mve-vcvtne-it.s
@@ -0,0 +1,4 @@
+.syntax unified
+.text
+it ne
+vcvtne.s32.f64 s13, d8