[AArch64,5/6] Implement support for Crypto -- SHA256.

diff --git a/gcc/config/aarch64/aarch64-simd-builtins.def b/gcc/config/aarch64/aarch64-simd-builtins.def
index b0b9bf1..dd21d9c 100644
--- a/gcc/config/aarch64/aarch64-simd-builtins.def
+++ b/gcc/config/aarch64/aarch64-simd-builtins.def
@@ -376,3 +376,8 @@ 
   VAR1 (TERNOP, crypto_sha1p, 0, v4si)
   VAR1 (TERNOP, crypto_sha1su0, 0, v4si)
 
+  /* Implemented by aarch64_crypto_sha256<op><mode>.  */
+  VAR1 (TERNOP, crypto_sha256h, 0, v4si)
+  VAR1 (TERNOP, crypto_sha256h2, 0, v4si)
+  VAR1 (BINOP, crypto_sha256su0, 0, v4si)
+  VAR1 (TERNOP, crypto_sha256su1, 0, v4si)
diff --git a/gcc/config/aarch64/aarch64-simd.md b/gcc/config/aarch64/aarch64-simd.md
index ab9ad57..5bcada2 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -4139,3 +4139,37 @@ 
   "sha1su0\\t%0.4s, %2.4s, %3.4s"
   [(set_attr "type" "crypto_sha1_xor")]
 )
+
+;; sha256
+
+(define_insn "aarch64_crypto_sha256h<sha256_op>v4si"
+  [(set (match_operand:V4SI 0 "register_operand" "=w")
+        (unspec:V4SI [(match_operand:V4SI 1 "register_operand" "0")
+                      (match_operand:V4SI 2 "register_operand" "w")
+                      (match_operand:V4SI 3 "register_operand" "w")]
+         CRYPTO_SHA256))]
+  "TARGET_SIMD && TARGET_CRYPTO"
+  "sha256h<sha256_op>\\t%q0, %q2, %3.4s"
+  [(set_attr "type" "crypto_sha256_slow")]
+)
+
+(define_insn "aarch64_crypto_sha256su0v4si"
+  [(set (match_operand:V4SI 0 "register_operand" "=w")
+        (unspec:V4SI [(match_operand:V4SI 1 "register_operand" "0")
+                      (match_operand:V4SI 2 "register_operand" "w")]
+         UNSPEC_SHA256SU0))]
+  "TARGET_SIMD &&TARGET_CRYPTO"
+  "sha256su0\\t%0.4s, %2.4s"
+  [(set_attr "type" "crypto_sha256_fast")]
+)
+
+(define_insn "aarch64_crypto_sha256su1v4si"
+  [(set (match_operand:V4SI 0 "register_operand" "=w")
+        (unspec:V4SI [(match_operand:V4SI 1 "register_operand" "0")
+                      (match_operand:V4SI 2 "register_operand" "w")
+                      (match_operand:V4SI 3 "register_operand" "w")]
+         UNSPEC_SHA256SU1))]
+  "TARGET_SIMD &&TARGET_CRYPTO"
+  "sha256su1\\t%0.4s, %2.4s, %3.4s"
+  [(set_attr "type" "crypto_sha256_slow")]
+)
diff --git a/gcc/config/aarch64/arm_neon.h b/gcc/config/aarch64/arm_neon.h
index 244abe7..d038e37 100644
--- a/gcc/config/aarch64/arm_neon.h
+++ b/gcc/config/aarch64/arm_neon.h
@@ -23226,6 +23226,34 @@  vsha1su1q_u32 (uint32x4_t tw0_3, uint32x4_t w12_15)
 							    (int32x4_t) w12_15);
 }
 
+static __inline uint32x4_t
+vsha256hq_u32 (uint32x4_t hash_abcd, uint32x4_t hash_efgh, uint32x4_t wk)
+{
+  return (uint32x4_t) __builtin_aarch64_crypto_sha256hv4si
+	    ((int32x4_t) hash_abcd, (int32x4_t) hash_efgh, (int32x4_t) wk);
+}
+
+static __inline uint32x4_t
+vsha256h2q_u32 (uint32x4_t hash_efgh, uint32x4_t hash_abcd, uint32x4_t wk)
+{
+  return (uint32x4_t) __builtin_aarch64_crypto_sha256h2v4si
+	    ((int32x4_t) hash_efgh, (int32x4_t) hash_abcd, (int32x4_t) wk);
+}
+
+static __inline uint32x4_t
+vsha256su0q_u32 (uint32x4_t w0_3, uint32x4_t w4_7)
+{
+  return (uint32x4_t) __builtin_aarch64_crypto_sha256su0v4si
+			((int32x4_t) w0_3, (int32x4_t) w4_7);
+}
+
+static __inline uint32x4_t
+vsha256su1q_u32 (uint32x4_t tw0_3, uint32x4_t w8_11, uint32x4_t w12_15)
+{
+  return (uint32x4_t) __builtin_aarch64_crypto_sha256su1v4si
+	   ((int32x4_t) tw0_3, (int32x4_t) w8_11, (int32x4_t) w12_15);
+}
+
 #endif
 
 /* vshl */
diff --git a/gcc/config/aarch64/iterators.md b/gcc/config/aarch64/iterators.md
index 650b503..ae94e5a 100644
--- a/gcc/config/aarch64/iterators.md
+++ b/gcc/config/aarch64/iterators.md
@@ -273,6 +273,10 @@ 
     UNSPEC_SHA1H        ; Used in aarch64-simd.md.
     UNSPEC_SHA1SU0      ; Used in aarch64-simd.md.
     UNSPEC_SHA1SU1      ; Used in aarch64-simd.md.
+    UNSPEC_SHA256H      ; Used in aarch64-simd.md.
+    UNSPEC_SHA256H2     ; Used in aarch64-simd.md.
+    UNSPEC_SHA256SU0    ; Used in aarch64-simd.md.
+    UNSPEC_SHA256SU1    ; Used in aarch64-simd.md.
 ])
 
 ;; -------------------------------------------------------------------
@@ -858,6 +862,8 @@ 
 
 (define_int_iterator CRYPTO_SHA1 [UNSPEC_SHA1C UNSPEC_SHA1M UNSPEC_SHA1P])
 
+(define_int_iterator CRYPTO_SHA256 [UNSPEC_SHA256H UNSPEC_SHA256H2])
+
 ;; -------------------------------------------------------------------
 ;; Int Iterators Attributes.
 ;; -------------------------------------------------------------------
@@ -980,3 +986,5 @@ 
 
 (define_int_attr sha1_op [(UNSPEC_SHA1C "c") (UNSPEC_SHA1P "p")
 			  (UNSPEC_SHA1M "m")])
+
+(define_int_attr sha256_op [(UNSPEC_SHA256H "") (UNSPEC_SHA256H2 "2")])
diff --git a/gcc/testsuite/gcc.target/aarch64/sha256.c b/gcc/testsuite/gcc.target/aarch64/sha256.c
new file mode 100644
index 0000000..6cda5dd
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sha256.c
@@ -0,0 +1,40 @@ 
+
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+crypto" } */
+
+#include "arm_neon.h"
+
+uint32x4_t
+test_vsha256hq_u32 (uint32x4_t hash_abcd, uint32x4_t hash_efgh, uint32x4_t wk)
+{
+  return vsha256hq_u32 (hash_abcd, hash_efgh, wk);
+}
+
+/* { dg-final { scan-assembler "sha256h\\tq" } } */
+
+uint32x4_t
+test_vsha256h2q_u32 (uint32x4_t hash_efgh, uint32x4_t hash_abcd, uint32x4_t wk)
+{
+  return vsha256h2q_u32 (hash_efgh, hash_abcd, wk);
+}
+
+/* { dg-final { scan-assembler "sha256h2\\tq" } } */
+
+uint32x4_t
+test_vsha256su0q_u32 (uint32x4_t w0_3, uint32x4_t w4_7)
+{
+  return vsha256su0q_u32 (w0_3, w4_7);
+}
+
+/* { dg-final { scan-assembler "sha256su0\\tv" } } */
+
+uint32x4_t
+test_vsha256su1q_u32 (uint32x4_t tw0_3, uint32x4_t w8_11, uint32x4_t w12_15)
+{
+  return vsha256su1q_u32 (tw0_3, w8_11, w12_15);
+}
+
+/* { dg-final { scan-assembler "sha256su1\\tv" } } */
+
+
+/* { dg-final { cleanup-saved-temps } } */