1 files changed, 47 insertions, 0 deletions
diff --git a/math/aarch64/advsimd/cexpi.c b/math/aarch64/advsimd/cexpi.c
new file mode 100644
index 000000000000..40ba5ff31f20
--- /dev/null
+++ b/math/aarch64/advsimd/cexpi.c
@@ -0,0 +1,47 @@
+/*
+ * Double-precision vector sincos function - return-by-value interface.
+ *
+ * Copyright (c) 2023-2024, Arm Limited.
+ * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
+ */
+
+#include "v_sincos_common.h"
+#include "v_math.h"
+#include "test_defs.h"
+
+static float64x2x2_t VPCS_ATTR NOINLINE
+special_case (float64x2_t x, uint64x2_t special, float64x2x2_t y)
+{
+  return (float64x2x2_t){ v_call_f64 (sin, x, y.val[0], special),
+			  v_call_f64 (cos, x, y.val[1], special) };
+}
+
+/* Double-precision vector function allowing calculation of both sin and cos in
+   one function call, using shared argument reduction and separate polynomials.
+   Largest observed error is for sin, 3.22 ULP:
+   v_sincos_sin (0x1.d70eef40f39b1p+12) got -0x1.ffe9537d5dbb7p-3
+				       want -0x1.ffe9537d5dbb4p-3.  */
+VPCS_ATTR float64x2x2_t
+_ZGVnN2v_cexpi (float64x2_t x)
+{
+  const struct v_sincos_data *d = ptr_barrier (&v_sincos_data);
+  uint64x2_t special = check_ge_rangeval (x, d);
+
+  float64x2x2_t sc = v_sincos_inline (x, d);
+
+  if (unlikely (v_any_u64 (special)))
+    return special_case (x, special, sc);
+  return sc;
+}
+
+TEST_DISABLE_FENV (_ZGVnN2v_cexpi_cos)
+TEST_DISABLE_FENV (_ZGVnN2v_cexpi_sin)
+TEST_ULP (_ZGVnN2v_cexpi_sin, 2.73)
+TEST_ULP (_ZGVnN2v_cexpi_cos, 2.73)
+#define V_CEXPI_INTERVAL(lo, hi, n)                                           \
+  TEST_INTERVAL (_ZGVnN2v_cexpi_sin, lo, hi, n)                               \
+  TEST_INTERVAL (_ZGVnN2v_cexpi_cos, lo, hi, n)
+V_CEXPI_INTERVAL (0, 0x1p23, 500000)
+V_CEXPI_INTERVAL (-0, -0x1p23, 500000)
+V_CEXPI_INTERVAL (0x1p23, inf, 10000)
+V_CEXPI_INTERVAL (-0x1p23, -inf, 10000)