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diff -rup binutils.orig/gas/config/tc-s390.c binutils-2.30/gas/config/tc-s390.c
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--- binutils.orig/gas/config/tc-s390.c	2022-04-11 09:54:43.234516094 +0100
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+++ binutils-2.30/gas/config/tc-s390.c	2022-04-11 09:55:31.670168952 +0100
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@@ -292,9 +292,9 @@ s390_parse_cpu (const char *         arg
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       S390_INSTR_FLAG_HTM | S390_INSTR_FLAG_VX },
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     { STRING_COMMA_LEN ("z14"), STRING_COMMA_LEN ("arch12"),
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       S390_INSTR_FLAG_HTM | S390_INSTR_FLAG_VX },
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-    { STRING_COMMA_LEN (""), STRING_COMMA_LEN ("arch13"),
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+    { STRING_COMMA_LEN ("z15"), STRING_COMMA_LEN ("arch13"),
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       S390_INSTR_FLAG_HTM | S390_INSTR_FLAG_VX },
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-    { STRING_COMMA_LEN (""), STRING_COMMA_LEN ("arch14"),
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+    { STRING_COMMA_LEN ("z16"), STRING_COMMA_LEN ("arch14"),
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       S390_INSTR_FLAG_HTM | S390_INSTR_FLAG_VX }
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   };
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   static struct
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diff -rup binutils.orig/gas/doc/c-s390.texi binutils-2.30/gas/doc/c-s390.texi
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--- binutils.orig/gas/doc/c-s390.texi	2022-04-11 09:54:43.236516079 +0100
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+++ binutils-2.30/gas/doc/c-s390.texi	2022-04-11 09:56:40.709674135 +0100
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@@ -18,7 +18,7 @@ and eleven chip levels. The architecture
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 Architecture (ESA) and the newer z/Architecture mode. The chip levels
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 are g5 (or arch3), g6, z900 (or arch5), z990 (or arch6), z9-109, z9-ec
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 (or arch7), z10 (or arch8), z196 (or arch9), zEC12 (or arch10), z13
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-(or arch11), z14 (or arch12), z15 (or arch13), or arch14.
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+(or arch11), z14 (or arch12), z15 (or arch13), or z16 (or arch14).
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 @menu
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 * s390 Options::                Command-line Options.
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@@ -72,7 +72,7 @@ are recognized:
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 @code{z13} (or @code{arch11}),
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 @code{z14} (or @code{arch12}),
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 @code{z15} (or @code{arch13}), and
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-@code{arch14}.
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+@code{z16} (or @code{arch14}).
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 Assembling an instruction that is not supported on the target
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 processor results in an error message.
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diff -rup binutils.orig/opcodes/s390-mkopc.c binutils-2.30/opcodes/s390-mkopc.c
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--- binutils.orig/opcodes/s390-mkopc.c	2022-04-11 09:54:43.491514252 +0100
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+++ binutils-2.30/opcodes/s390-mkopc.c	2022-04-11 09:58:24.228932192 +0100
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@@ -377,9 +377,11 @@ main (void)
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       else if (strcmp (cpu_string, "z14") == 0
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 	       || strcmp (cpu_string, "arch12") == 0)
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 	min_cpu = S390_OPCODE_ARCH12;
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-      else if (strcmp (cpu_string, "arch13") == 0)
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+      else if ((strcmp (cpu_string, "z15") == 0
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+		|| strcmp (cpu_string, "arch13") == 0))
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 	min_cpu = S390_OPCODE_ARCH13;
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-      else if (strcmp (cpu_string, "arch14") == 0)
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+      else if ((strcmp (cpu_string, "z16") == 0
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+		|| strcmp (cpu_string, "arch14") == 0))
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 	min_cpu = S390_OPCODE_ARCH14;
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       else {
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 	fprintf (stderr, "Couldn't parse cpu string %s\n", cpu_string);