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-rw-r--r--contrib/arm-optimized-routines/math/v_exp2f_1u.c75
1 files changed, 0 insertions, 75 deletions
diff --git a/contrib/arm-optimized-routines/math/v_exp2f_1u.c b/contrib/arm-optimized-routines/math/v_exp2f_1u.c
deleted file mode 100644
index 1caa14d9bfff..000000000000
--- a/contrib/arm-optimized-routines/math/v_exp2f_1u.c
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
- * Single-precision vector 2^x function.
- *
- * Copyright (c) 2019, Arm Limited.
- * SPDX-License-Identifier: MIT
- */
-
-#include "mathlib.h"
-#include "v_math.h"
-#if V_SUPPORTED
-
-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)
-
-VPCS_ATTR
-static v_f32_t
-specialcase (v_f32_t poly, v_f32_t n, v_u32_t e, v_f32_t absn)
-{
- /* 2^n may overflow, break it up into s1*s2. */
- v_u32_t b = v_cond_u32 (n <= v_f32 (0.0f)) & v_u32 (0x83000000);
- v_f32_t s1 = v_as_f32_u32 (v_u32 (0x7f000000) + b);
- v_f32_t s2 = v_as_f32_u32 (e - b);
- v_u32_t cmp = v_cond_u32 (absn > v_f32 (192.0f));
- v_f32_t r1 = s1 * s1;
- v_f32_t r0 = poly * s1 * s2;
- return v_as_f32_u32 ((cmp & v_as_u32_f32 (r1)) | (~cmp & v_as_u32_f32 (r0)));
-}
-
-VPCS_ATTR
-v_f32_t
-V_NAME(exp2f_1u) (v_f32_t x)
-{
- v_f32_t n, r, scale, poly, absn;
- v_u32_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
- v_f32_t z;
- z = x + Shift;
- n = z - Shift;
- r = x - n;
- e = v_as_u32_f32 (z) << 23;
-#else
- n = v_round_f32 (x);
- r = x - n;
- e = v_as_u32_s32 (v_round_s32 (x)) << 23;
-#endif
- scale = v_as_f32_u32 (e + v_u32 (0x3f800000));
- absn = v_abs_f32 (n);
- cmp = v_cond_u32 (absn > v_f32 (126.0f));
- poly = v_fma_f32 (C0, r, C1);
- poly = v_fma_f32 (poly, r, C2);
- poly = v_fma_f32 (poly, r, C3);
- poly = v_fma_f32 (poly, r, C4);
- poly = v_fma_f32 (poly, r, C5);
- poly = v_fma_f32 (poly, r, v_f32 (1.0f));
- if (unlikely (v_any_u32 (cmp)))
- return specialcase (poly, n, e, absn);
- return scale * poly;
-}
-#endif