neon/qrshrn_n: native and portable implementations

Fixes #803

meson.build

@@ -107,6 +107,7 @@ simde_neon_families = [
   'qdmull',
   'qrdmulh',
   'qrdmulh_n',
+  'qrshrn_n',
   'qrshrun_n',
   'qmovn',
   'qmovn_high',

simde/arm/neon.h

@@ -127,6 +127,7 @@
 #include "neon/qdmull.h"
 #include "neon/qrdmulh.h"
 #include "neon/qrdmulh_n.h"
+#include "neon/qrshrn_n.h"
 #include "neon/qrshrun_n.h"
 #include "neon/qmovn.h"
 #include "neon/qmovun.h"

simde/arm/neon/qrshrn_n.h

@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Copyright:
+ *   2021      Zhi An Ng <zhin@google.com> (Copyright owned by Google, LLC)
+ */
+
+#if !defined(SIMDE_ARM_NEON_QRSHRN_N_H)
+#define SIMDE_ARM_NEON_QRSHRN_N_H
+
+#include "types.h"
+#include "rshr_n.h"
+#include "qmovn.h"
+
+HEDLEY_DIAGNOSTIC_PUSH
+SIMDE_DISABLE_UNWANTED_DIAGNOSTICS
+SIMDE_BEGIN_DECLS_
+
+#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
+  #define simde_vqrshrn_n_s16(a, n) vqrshrn_n_s16((a), (n))
+#else
+  #define simde_vqrshrn_n_s16(a, n) simde_vqmovn_s16(simde_vrshrq_n_s16(a, n))
+#endif
+#if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES)
+  #undef vqrshrn_n_s16
+  #define vqrshrn_n_s16(a, n) simde_vqrshrn_n_s16((a), (n))
+#endif
+
+#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
+  #define simde_vqrshrn_n_s32(a, n) vqrshrn_n_s32((a), (n))
+#else
+  #define simde_vqrshrn_n_s32(a, n) simde_vqmovn_s32(simde_vrshrq_n_s32(a, n))
+#endif
+#if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES)
+  #undef vqrshrn_n_s32
+  #define vqrshrn_n_s32(a, n) simde_vqrshrn_n_s32((a), (n))
+#endif
+
+#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
+  #define simde_vqrshrn_n_s64(a, n) vqrshrn_n_s64((a), (n))
+#else
+  #define simde_vqrshrn_n_s64(a, n) simde_vqmovn_s64(simde_vrshrq_n_s64(a, n))
+#endif
+#if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES)
+  #undef vqrshrn_n_s64
+  #define vqrshrn_n_s64(a, n) simde_vqrshrn_n_s64((a), (n))
+#endif
+
+#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
+  #define simde_vqrshrn_n_u16(a, n) vqrshrn_n_u16((a), (n))
+#else
+  #define simde_vqrshrn_n_u16(a, n) simde_vqmovn_u16(simde_vrshrq_n_u16(a, n))
+#endif
+#if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES)
+  #undef vqrshrn_n_u16
+  #define vqrshrn_n_u16(a, n) simde_vqrshrn_n_u16((a), (n))
+#endif
+
+#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
+  #define simde_vqrshrn_n_u32(a, n) vqrshrn_n_u32((a), (n))
+#else
+  #define simde_vqrshrn_n_u32(a, n) simde_vqmovn_u32(simde_vrshrq_n_u32(a, n))
+#endif
+#if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES)
+  #undef vqrshrn_n_u32
+  #define vqrshrn_n_u32(a, n) simde_vqrshrn_n_u32((a), (n))
+#endif
+
+#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
+  #define simde_vqrshrn_n_u64(a, n) vqrshrn_n_u64((a), (n))
+#else
+  #define simde_vqrshrn_n_u64(a, n) simde_vqmovn_u64(simde_vrshrq_n_u64(a, n))
+#endif
+#if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES)
+  #undef vqrshrn_n_u64
+  #define vqrshrn_n_u64(a, n) simde_vqrshrn_n_u64((a), (n))
+#endif
+
+
+SIMDE_END_DECLS_
+HEDLEY_DIAGNOSTIC_POP
+
+#endif /* !defined(SIMDE_ARM_NEON_QRSHRN_N_H) */

test/arm/neon/declare-suites.h

@@ -93,6 +93,7 @@ SIMDE_TEST_DECLARE_SUITE(qdmulh)
 SIMDE_TEST_DECLARE_SUITE(qdmull)
 SIMDE_TEST_DECLARE_SUITE(qrdmulh)
 SIMDE_TEST_DECLARE_SUITE(qrdmulh_n)
+SIMDE_TEST_DECLARE_SUITE(qrshrn_n)
 SIMDE_TEST_DECLARE_SUITE(qrshrun_n)
 SIMDE_TEST_DECLARE_SUITE(qmovn)
 SIMDE_TEST_DECLARE_SUITE(qmovn_high)