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Diffstat (limited to 'math/aarch64/v_exp2f_1u.c')
-rw-r--r--math/aarch64/v_exp2f_1u.c72
1 files changed, 0 insertions, 72 deletions
diff --git a/math/aarch64/v_exp2f_1u.c b/math/aarch64/v_exp2f_1u.c
deleted file mode 100644
index ba6b02fbb4bc..000000000000
--- a/math/aarch64/v_exp2f_1u.c
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * Single-precision vector 2^x function.
- *
- * Copyright (c) 2019-2023, Arm Limited.
- * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
- */
-
-#include "mathlib.h"
-#include "v_math.h"
-
-static const float Poly[] = {
- /* maxerr: 0.878 ulp. */
- 0x1.416b5ep-13f, 0x1.5f082ep-10f, 0x1.3b2dep-7f, 0x1.c6af7cp-5f, 0x1.ebfbdcp-3f, 0x1.62e43p-1f
-};
-#define C0 v_f32 (Poly[0])
-#define C1 v_f32 (Poly[1])
-#define C2 v_f32 (Poly[2])
-#define C3 v_f32 (Poly[3])
-#define C4 v_f32 (Poly[4])
-#define C5 v_f32 (Poly[5])
-
-#define Shift v_f32 (0x1.8p23f)
-#define InvLn2 v_f32 (0x1.715476p+0f)
-#define Ln2hi v_f32 (0x1.62e4p-1f)
-#define Ln2lo v_f32 (0x1.7f7d1cp-20f)
-
-static float32x4_t VPCS_ATTR NOINLINE
-specialcase (float32x4_t poly, float32x4_t n, uint32x4_t e, float32x4_t absn)
-{
- /* 2^n may overflow, break it up into s1*s2. */
- uint32x4_t b = (n <= v_f32 (0.0f)) & v_u32 (0x83000000);
- float32x4_t s1 = vreinterpretq_f32_u32 (v_u32 (0x7f000000) + b);
- float32x4_t s2 = vreinterpretq_f32_u32 (e - b);
- uint32x4_t cmp = absn > v_f32 (192.0f);
- float32x4_t r1 = s1 * s1;
- float32x4_t r0 = poly * s1 * s2;
- return vreinterpretq_f32_u32 ((cmp & vreinterpretq_u32_f32 (r1))
- | (~cmp & vreinterpretq_u32_f32 (r0)));
-}
-
-float32x4_t VPCS_ATTR
-_ZGVnN4v_exp2f_1u (float32x4_t x)
-{
- float32x4_t n, r, scale, poly, absn;
- uint32x4_t cmp, e;
-
- /* exp2(x) = 2^n * poly(r), with poly(r) in [1/sqrt(2),sqrt(2)]
- x = n + r, with r in [-1/2, 1/2]. */
-#if 0
- float32x4_t z;
- z = x + Shift;
- n = z - Shift;
- r = x - n;
- e = vreinterpretq_u32_f32 (z) << 23;
-#else
- n = vrndaq_f32 (x);
- r = x - n;
- e = vreinterpretq_u32_s32 (vcvtaq_s32_f32 (x)) << 23;
-#endif
- scale = vreinterpretq_f32_u32 (e + v_u32 (0x3f800000));
- absn = vabsq_f32 (n);
- cmp = absn > v_f32 (126.0f);
- poly = vfmaq_f32 (C1, C0, r);
- poly = vfmaq_f32 (C2, poly, r);
- poly = vfmaq_f32 (C3, poly, r);
- poly = vfmaq_f32 (C4, poly, r);
- poly = vfmaq_f32 (C5, poly, r);
- poly = vfmaq_f32 (v_f32 (1.0f), poly, r);
- if (unlikely (v_any_u32 (cmp)))
- return specialcase (poly, n, e, absn);
- return scale * poly;
-}