[PATCH 1/17][ARM] Add ARMv8.2-A command line option and profile.

2016-09-23  Matthew Wahab  <matthew.wahab@arm.com>

	* config/arm/arm-arches.def ("armv8.1-a"): Add FL_CRC32.
	("armv8.2-a"): New.
	("armv8.2-a+fp16"): New.
	* config/arm/arm-protos.h (FL2_ARCH8_2): New.
	(FL2_FP16INST): New.
	(FL2_FOR_ARCH8_2A): New.
	* config/arm/arm-tables.opt: Regenerate.
	* config/arm/arm.c (arm_arch8_2): New.
	(arm_fp16_inst): New.
	(arm_option_override): Set arm_arch8_2 and arm_fp16_inst.  Check
	for incompatible fp16-format settings.
	* config/arm/arm.h (TARGET_VFP_FP16INST): New.
	(TARGET_NEON_FP16INST): New.
	(arm_arch8_2): Declare.
	(arm_fp16_inst): Declare.
	* config/arm/bpabi.h (BE8_LINK_SPEC): Add entries for
	march=armv8.2-a and march=armv8.2-a+fp16.
	* config/arm/t-aprofile (Arch Matches): Add entries for armv8.2-a
	and armv8.2-a+fp16.
	* doc/invoke.texi (ARM Options): Add "-march=armv8.1-a",
	"-march=armv8.2-a" and "-march=armv8.2-a+fp16".

From-SVN: r240398

9 files changed, 95 insertions, 7 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5212944..a18b196 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,27 @@
+2016-09-23  Matthew Wahab  <matthew.wahab@arm.com>
+
+	* config/arm/arm-arches.def ("armv8.1-a"): Add FL_CRC32.
+	("armv8.2-a"): New.
+	("armv8.2-a+fp16"): New.
+	* config/arm/arm-protos.h (FL2_ARCH8_2): New.
+	(FL2_FP16INST): New.
+	(FL2_FOR_ARCH8_2A): New.
+	* config/arm/arm-tables.opt: Regenerate.
+	* config/arm/arm.c (arm_arch8_2): New.
+	(arm_fp16_inst): New.
+	(arm_option_override): Set arm_arch8_2 and arm_fp16_inst.  Check
+	for incompatible fp16-format settings.
+	* config/arm/arm.h (TARGET_VFP_FP16INST): New.
+	(TARGET_NEON_FP16INST): New.
+	(arm_arch8_2): Declare.
+	(arm_fp16_inst): Declare.
+	* config/arm/bpabi.h (BE8_LINK_SPEC): Add entries for
+	march=armv8.2-a and march=armv8.2-a+fp16.
+	* config/arm/t-aprofile (Arch Matches): Add entries for armv8.2-a
+	and armv8.2-a+fp16.
+	* doc/invoke.texi (ARM Options): Add "-march=armv8.1-a",
+	"-march=armv8.2-a" and "-march=armv8.2-a+fp16".
+
 2016-09-23  Martin Liska  <mliska@suse.cz>
 
 	* doc/extend.texi: Remove fused-madd from i386 target
diff --git a/gcc/config/arm/arm-arches.def b/gcc/config/arm/arm-arches.def
index be46521..4b196a7 100644
--- a/gcc/config/arm/arm-arches.def
+++ b/gcc/config/arm/arm-arches.def
@@ -58,10 +58,17 @@ ARM_ARCH("armv7e-m", cortexm4,  7EM,	ARM_FSET_MAKE_CPU1 (FL_CO_PROC |	      FL_F
 ARM_ARCH("armv8-a", cortexa53,  8A,	ARM_FSET_MAKE_CPU1 (FL_CO_PROC |             FL_FOR_ARCH8A))
 ARM_ARCH("armv8-a+crc",cortexa53, 8A,   ARM_FSET_MAKE_CPU1 (FL_CO_PROC | FL_CRC32  | FL_FOR_ARCH8A))
 ARM_ARCH("armv8.1-a", cortexa53,  8A,
-	  ARM_FSET_MAKE (FL_CO_PROC | FL_FOR_ARCH8A,  FL2_FOR_ARCH8_1A))
+	  ARM_FSET_MAKE (FL_CO_PROC | FL_CRC32 | FL_FOR_ARCH8A,
+			 FL2_FOR_ARCH8_1A))
 ARM_ARCH("armv8.1-a+crc",cortexa53, 8A,
 	  ARM_FSET_MAKE (FL_CO_PROC | FL_CRC32 | FL_FOR_ARCH8A,
 			 FL2_FOR_ARCH8_1A))
+ARM_ARCH ("armv8.2-a", cortexa53,  8A,
+	  ARM_FSET_MAKE (FL_CO_PROC | FL_CRC32 | FL_FOR_ARCH8A,
+			 FL2_FOR_ARCH8_2A))
+ARM_ARCH ("armv8.2-a+fp16", cortexa53,  8A,
+	  ARM_FSET_MAKE (FL_CO_PROC | FL_CRC32 | FL_FOR_ARCH8A,
+			 FL2_FOR_ARCH8_2A | FL2_FP16INST))
 ARM_ARCH("armv8-m.base", cortexm0, 8M_BASE,
 	 ARM_FSET_MAKE_CPU1 (			      FL_FOR_ARCH8M_BASE))
 ARM_ARCH("armv8-m.main", cortexm7, 8M_MAIN,
@@ -70,4 +77,3 @@ ARM_ARCH("armv8-m.main+dsp", cortexm7, 8M_MAIN,
 	 ARM_FSET_MAKE_CPU1(FL_CO_PROC | FL_ARCH7EM | FL_FOR_ARCH8M_MAIN))
 ARM_ARCH("iwmmxt",  iwmmxt,     5TE,	ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_STRONG | FL_FOR_ARCH5TE | FL_XSCALE | FL_IWMMXT))
 ARM_ARCH("iwmmxt2", iwmmxt2,    5TE,	ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_STRONG | FL_FOR_ARCH5TE | FL_XSCALE | FL_IWMMXT | FL_IWMMXT2))
-
diff --git a/gcc/config/arm/arm-protos.h b/gcc/config/arm/arm-protos.h
index 374836c..fd8b6d1 100644
--- a/gcc/config/arm/arm-protos.h
+++ b/gcc/config/arm/arm-protos.h
@@ -393,6 +393,9 @@ extern bool arm_is_constant_pool_ref (rtx);
 #define FL_ARCH6KZ    (1 << 31)       /* ARMv6KZ architecture.  */
 
 #define FL2_ARCH8_1   (1 << 0)	      /* Architecture 8.1.  */
+#define FL2_ARCH8_2   (1 << 1)	      /* Architecture 8.2.  */
+#define FL2_FP16INST  (1 << 2)	      /* FP16 Instructions for ARMv8.2 and
+					 later.  */
 
 /* Flags that only effect tuning, not available instructions.  */
 #define FL_TUNE		(FL_WBUF | FL_VFPV2 | FL_STRONG | FL_LDSCHED \
@@ -424,6 +427,7 @@ extern bool arm_is_constant_pool_ref (rtx);
 #define FL_FOR_ARCH7EM		(FL_FOR_ARCH7M | FL_ARCH7EM)
 #define FL_FOR_ARCH8A		(FL_FOR_ARCH7VE | FL_ARCH8)
 #define FL2_FOR_ARCH8_1A	FL2_ARCH8_1
+#define FL2_FOR_ARCH8_2A	(FL2_FOR_ARCH8_1A | FL2_ARCH8_2)
 #define FL_FOR_ARCH8M_BASE	(FL_FOR_ARCH6M | FL_ARCH8 | FL_THUMB_DIV)
 #define FL_FOR_ARCH8M_MAIN	(FL_FOR_ARCH7M | FL_ARCH8)
 
diff --git a/gcc/config/arm/arm-tables.opt b/gcc/config/arm/arm-tables.opt
index b92cb17..ee9e3bb 100644
--- a/gcc/config/arm/arm-tables.opt
+++ b/gcc/config/arm/arm-tables.opt
@@ -437,19 +437,25 @@ EnumValue
 Enum(arm_arch) String(armv8.1-a+crc) Value(28)
 
 EnumValue
-Enum(arm_arch) String(armv8-m.base) Value(29)
+Enum(arm_arch) String(armv8.2-a) Value(29)
 
 EnumValue
-Enum(arm_arch) String(armv8-m.main) Value(30)
+Enum(arm_arch) String(armv8.2-a+fp16) Value(30)
 
 EnumValue
-Enum(arm_arch) String(armv8-m.main+dsp) Value(31)
+Enum(arm_arch) String(armv8-m.base) Value(31)
 
 EnumValue
-Enum(arm_arch) String(iwmmxt) Value(32)
+Enum(arm_arch) String(armv8-m.main) Value(32)
 
 EnumValue
-Enum(arm_arch) String(iwmmxt2) Value(33)
+Enum(arm_arch) String(armv8-m.main+dsp) Value(33)
+
+EnumValue
+Enum(arm_arch) String(iwmmxt) Value(34)
+
+EnumValue
+Enum(arm_arch) String(iwmmxt2) Value(35)
 
 Enum
 Name(arm_fpu) Type(int)
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index b68e005..664c582 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -823,6 +823,13 @@ int arm_arch8 = 0;
 /* Nonzero if this chip supports the ARMv8.1 extensions.  */
 int arm_arch8_1 = 0;
 
+/* Nonzero if this chip supports the ARM Architecture 8.2 extensions.  */
+int arm_arch8_2 = 0;
+
+/* Nonzero if this chip supports the FP16 instructions extension of ARM
+   Architecture 8.2.  */
+int arm_fp16_inst = 0;
+
 /* Nonzero if this chip can benefit from load scheduling.  */
 int arm_ld_sched = 0;
 
@@ -3232,6 +3239,7 @@ arm_option_override (void)
   arm_arch7em = ARM_FSET_HAS_CPU1 (insn_flags, FL_ARCH7EM);
   arm_arch8 = ARM_FSET_HAS_CPU1 (insn_flags, FL_ARCH8);
   arm_arch8_1 = ARM_FSET_HAS_CPU2 (insn_flags, FL2_ARCH8_1);
+  arm_arch8_2 = ARM_FSET_HAS_CPU2 (insn_flags, FL2_ARCH8_2);
   arm_arch_thumb1 = ARM_FSET_HAS_CPU1 (insn_flags, FL_THUMB);
   arm_arch_thumb2 = ARM_FSET_HAS_CPU1 (insn_flags, FL_THUMB2);
   arm_arch_xscale = ARM_FSET_HAS_CPU1 (insn_flags, FL_XSCALE);
@@ -3248,6 +3256,13 @@ arm_option_override (void)
   arm_tune_cortex_a9 = (arm_tune == cortexa9) != 0;
   arm_arch_crc = ARM_FSET_HAS_CPU1 (insn_flags, FL_CRC32);
   arm_m_profile_small_mul = ARM_FSET_HAS_CPU1 (insn_flags, FL_SMALLMUL);
+  arm_fp16_inst = ARM_FSET_HAS_CPU2 (insn_flags, FL2_FP16INST);
+  if (arm_fp16_inst)
+    {
+      if (arm_fp16_format == ARM_FP16_FORMAT_ALTERNATIVE)
+	error ("selected fp16 options are incompatible.");
+      arm_fp16_format = ARM_FP16_FORMAT_IEEE;
+    }
 
   /* V5 code we generate is completely interworking capable, so we turn off
      TARGET_INTERWORK here to avoid many tests later on.  */
diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h
index 31eb45a..35c72d3 100644
--- a/gcc/config/arm/arm.h
+++ b/gcc/config/arm/arm.h
@@ -217,6 +217,13 @@ extern void (*arm_lang_output_object_attributes_hook)(void);
 /* FPU supports ARMv8.1 Adv.SIMD extensions.  */
 #define TARGET_NEON_RDMA (TARGET_NEON && arm_arch8_1)
 
+/* FPU supports the floating point FP16 instructions for ARMv8.2 and later.  */
+#define TARGET_VFP_FP16INST \
+  (TARGET_32BIT && TARGET_HARD_FLOAT && TARGET_FPU_ARMV8 && arm_fp16_inst)
+
+/* FPU supports the AdvSIMD FP16 instructions for ARMv8.2 and later.  */
+#define TARGET_NEON_FP16INST (TARGET_VFP_FP16INST && TARGET_NEON_RDMA)
+
 /* Q-bit is present.  */
 #define TARGET_ARM_QBIT \
   (TARGET_32BIT && arm_arch5e && (arm_arch_notm || arm_arch7))
@@ -456,6 +463,13 @@ extern int arm_arch8;
 /* Nonzero if this chip supports the ARM Architecture 8.1 extensions.  */
 extern int arm_arch8_1;
 
+/* Nonzero if this chip supports the ARM Architecture 8.2 extensions.  */
+extern int arm_arch8_2;
+
+/* Nonzero if this chip supports the FP16 instructions extension of ARM
+   Architecture 8.2.  */
+extern int arm_fp16_inst;
+
 /* Nonzero if this chip can benefit from load scheduling.  */
 extern int arm_ld_sched;
 
diff --git a/gcc/config/arm/bpabi.h b/gcc/config/arm/bpabi.h
index ff21660..0da98fb 100644
--- a/gcc/config/arm/bpabi.h
+++ b/gcc/config/arm/bpabi.h
@@ -93,6 +93,8 @@
    |march=armv8-a+crc					\
    |march=armv8.1-a					\
    |march=armv8.1-a+crc					\
+   |march=armv8.2-a					\
+   |march=armv8.2-a+fp16				\
    |march=armv8-m.base					\
    |march=armv8-m.main					\
    |march=armv8-m.main+dsp				\
@@ -130,6 +132,8 @@
    |march=armv8-a+crc					\
    |march=armv8.1-a					\
    |march=armv8.1-a+crc					\
+   |march=armv8.2-a					\
+   |march=armv8.2-a+fp16				\
    |march=armv8-m.base					\
    |march=armv8-m.main					\
    |march=armv8-m.main+dsp				\
diff --git a/gcc/config/arm/t-aprofile b/gcc/config/arm/t-aprofile
index 90305e1..f852ecd 100644
--- a/gcc/config/arm/t-aprofile
+++ b/gcc/config/arm/t-aprofile
@@ -99,6 +99,8 @@ MULTILIB_MATCHES       += march?armv8-a=mcpu?xgene1
 MULTILIB_MATCHES       += march?armv8-a=march?armv8-a+crc
 MULTILIB_MATCHES       += march?armv8-a=march?armv8.1-a
 MULTILIB_MATCHES       += march?armv8-a=march?armv8.1-a+crc
+MULTILIB_MATCHES       += march?armv8-a=march?armv8.2-a
+MULTILIB_MATCHES       += march?armv8-a=march?armv8.2-a+fp16
 
 # FPU matches
 MULTILIB_MATCHES       += mfpu?vfpv3-d16=mfpu?vfpv3
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index d474da6..e6f503f 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -14503,6 +14503,19 @@ extensions.
 @option{-march=armv8-a+crc} enables code generation for the ARMv8-A
 architecture together with the optional CRC32 extensions.
 
+@option{-march=armv8.1-a} enables compiler support for the ARMv8.1-A
+architecture.  This also enables the features provided by
+@option{-march=armv8-a+crc}.
+
+@option{-march=armv8.2-a} enables compiler support for the ARMv8.2-A
+architecture.  This also enables the features provided by
+@option{-march=armv8.1-a}.
+
+@option{-march=armv8.2-a+fp16} enables compiler support for the
+ARMv8.2-A architecture with the optional FP16 instructions extension.
+This also enables the features provided by @option{-march=armv8.1-a}
+and implies @option{-mfp16-format=ieee}.
+
 @option{-march=native} causes the compiler to auto-detect the architecture
 of the build computer.  At present, this feature is only supported on
 GNU/Linux, and not all architectures are recognized.  If the auto-detect