neon/cvtn: basic implementation of a few functions

Fixes: #1008

Author: mr-c

meson.build

@@ -45,6 +45,7 @@ simde_neon_families = [
   'cmla_rot270',
   'cnt',
   'cvt',
+  'cvtn',
   'combine',
   'create',
   'dot',

simde/arm/neon.h

@@ -65,6 +65,7 @@
 #include "neon/cmla_rot270.h"
 #include "neon/cnt.h"
 #include "neon/cvt.h"
+#include "neon/cvtn.h"
 #include "neon/combine.h"
 #include "neon/create.h"
 #include "neon/dot.h"

simde/arm/neon/cvtn.h

@@ -0,0 +1,175 @@
+/* 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:
+ *   2023      Michael R. Crusoe <crusoe@debian.org>
+ */
+
+#if !defined(SIMDE_ARM_NEON_CVTN_H)
+#define SIMDE_ARM_NEON_CVTN_H
+
+#include "types.h"
+
+HEDLEY_DIAGNOSTIC_PUSH
+SIMDE_DISABLE_UNWANTED_DIAGNOSTICS
+SIMDE_BEGIN_DECLS_
+
+SIMDE_FUNCTION_ATTRIBUTES
+simde_int32x4_t
+simde_vcvtnq_s32_f32(simde_float32x4_t a) {
+  #if defined(SIMDE_ARM_NEON_A32V8_NATIVE)
+    return vcvtnq_s32_f32(a);
+  #else
+    simde_float32x4_private a_ = simde_float32x4_to_private(a);
+    simde_int32x4_private r_;
+
+    SIMDE_VECTORIZE
+    for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) {
+      r_.values[i] = HEDLEY_STATIC_CAST(int32_t, simde_math_roundevenf(a_.values[i]));
+    }
+
+    return simde_int32x4_from_private(r_);
+  #endif
+}
+#if defined(SIMDE_ARM_NEON_A32V8_ENABLE_NATIVE_ALIASES)
+  #undef vcvtnq_s32_f32
+  #define vcvtnq_s32_f32(a) simde_vcvtnq_s32_f32(a)
+#endif
+
+SIMDE_FUNCTION_ATTRIBUTES
+simde_int64x2_t
+simde_vcvtnq_s64_f64(simde_float64x2_t a) {
+  #if defined(SIMDE_ARM_NEON_A64V8_NATIVE)
+    return vcvtnq_s64_f64(a);
+  #else
+    simde_float64x2_private a_ = simde_float64x2_to_private(a);
+    simde_int64x2_private r_;
+
+    SIMDE_VECTORIZE
+    for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) {
+      r_.values[i] = HEDLEY_STATIC_CAST(int64_t, simde_math_roundeven(a_.values[i]));
+    }
+
+    return simde_int64x2_from_private(r_);
+  #endif
+}
+#if defined(SIMDE_ARM_NEON_A64V8_ENABLE_NATIVE_ALIASES)
+  #undef vcvtnq_s64_f64
+  #define vcvtnq_s64_f64(a) simde_vcvtnq_s64_f64(a)
+#endif
+
+SIMDE_FUNCTION_ATTRIBUTES
+uint32_t
+simde_vcvtns_u32_f32(simde_float32 a) {
+  #if defined(SIMDE_ARM_NEON_A64V8_NATIVE)
+    return vcvtns_u32_f32(a);
+  #elif defined(SIMDE_FAST_CONVERSION_RANGE)
+    return HEDLEY_STATIC_CAST(uint32_t, simde_math_roundevenf(a));
+  #else
+    if (HEDLEY_UNLIKELY(a < SIMDE_FLOAT32_C(0.0))) {
+      return 0;
+    } else if (HEDLEY_UNLIKELY(a > HEDLEY_STATIC_CAST(simde_float32, UINT32_MAX))) {
+      return UINT32_MAX;
+    } else if (simde_math_isnanf(a)) {
+      return 0;
+    } else {
+      return HEDLEY_STATIC_CAST(uint32_t, simde_math_roundevenf(a));
+    }
+  #endif
+}
+#if defined(SIMDE_ARM_NEON_A64V8_ENABLE_NATIVE_ALIASES)
+  #undef vcvtns_u32_f32
+  #define vcvtns_u32_f32(a) simde_vcvtns_u32_f32(a)
+#endif
+
+SIMDE_FUNCTION_ATTRIBUTES
+simde_uint32x4_t
+simde_vcvtnq_u32_f32(simde_float32x4_t a) {
+  #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) && !defined(SIMDE_BUG_CLANG_46844)
+    return vcvtnq_u32_f32(a);
+  #else
+    simde_float32x4_private a_ = simde_float32x4_to_private(a);
+    simde_uint32x4_private r_;
+
+    SIMDE_VECTORIZE
+    for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) {
+      r_.values[i] = simde_vcvtns_u32_f32(a_.values[i]);
+    }
+
+    return simde_uint32x4_from_private(r_);
+  #endif
+}
+#if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES)
+  #undef vcvtnq_u32_f32
+  #define vcvtnq_u32_f32(a) simde_vcvtnq_u32_f32(a)
+#endif
+
+SIMDE_FUNCTION_ATTRIBUTES
+uint64_t
+simde_vcvtnd_u64_f64(simde_float64 a) {
+  #if defined(SIMDE_ARM_NEON_A64V8_NATIVE)
+    return vcvtnd_u64_f64(a);
+  #elif defined(SIMDE_FAST_CONVERSION_RANGE)
+    return HEDLEY_STATIC_CAST(uint64_t, simde_math_roundeven(a));
+  #else
+    if (HEDLEY_UNLIKELY(a < SIMDE_FLOAT64_C(0.0))) {
+      return 0;
+    } else if (HEDLEY_UNLIKELY(a > HEDLEY_STATIC_CAST(simde_float64, UINT64_MAX))) {
+      return UINT64_MAX;
+    } else if (simde_math_isnan(a)) {
+      return 0;
+    } else {
+      return HEDLEY_STATIC_CAST(uint64_t, simde_math_roundeven(a));
+    }
+  #endif
+}
+#if defined(SIMDE_ARM_NEON_A64V8_ENABLE_NATIVE_ALIASES)
+  #undef vcvtnd_u64_f64
+  #define vcvtnd_u64_f64(a) simde_vcvtnd_u64_f64(a)
+#endif
+
+SIMDE_FUNCTION_ATTRIBUTES
+simde_uint64x2_t
+simde_vcvtnq_u64_f64(simde_float64x2_t a) {
+  #if defined(SIMDE_ARM_NEON_A64V8_NATIVE)
+    return vcvtnq_u64_f64(a);
+  #else
+    simde_float64x2_private a_ = simde_float64x2_to_private(a);
+    simde_uint64x2_private r_;
+
+    SIMDE_VECTORIZE
+    for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) {
+      r_.values[i] = simde_vcvtnd_u64_f64(a_.values[i]);
+    }
+
+    return simde_uint64x2_from_private(r_);
+  #endif
+}
+#if defined(SIMDE_ARM_NEON_A64V8_ENABLE_NATIVE_ALIASES)
+  #undef vcvtnq_u64_f64
+  #define vcvtnq_u64_f64(a) simde_vcvtnq_u64_f64(a)
+#endif
+
+SIMDE_END_DECLS_
+HEDLEY_DIAGNOSTIC_POP
+
+#endif /* SIMDE_ARM_NEON_CVTN_H */