[libc] clean up unused exp_utils

[michaelrj-google]

This file's just left over from old code, but it doesn't compile
anymore. It's never used so this patch just removes it.

[llvmbot]

@llvm/pr-subscribers-libc

Author: Michael Jones (michaelrj-google)

Changes

This file's just left over from old code, but it doesn't compile
anymore. It's never used so this patch just removes it.

---

Full diff: https://github.com/llvm/llvm-project/pull/143181.diff

3 Files Affected:

• (modified) libc/src/math/generic/CMakeLists.txt (+6-14)
• (removed) libc/src/math/generic/exp_utils.cpp (-128)
• (removed) libc/src/math/generic/exp_utils.h (-34)

diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index 27fe481cc64cb..db3ef8886b52b 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -1275,14 +1275,6 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.nearest_integer_operations
 )
 
-add_object_library(
-  exp_utils
-  HDRS
-    exp_utils.h
-  SRCS
-    exp_utils.cpp
-)
-
 add_entrypoint_object(
   erff
   SRCS
@@ -3978,7 +3970,7 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.polyeval
     libc.src.__support.FPUtil.sqrt
     libc.src.__support.macros.optimization
-    libc.src.__support.macros.properties.types 
+    libc.src.__support.macros.properties.types
 )
 
 add_entrypoint_object(
@@ -4046,7 +4038,7 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.multiply_add
     libc.src.__support.FPUtil.polyeval
     libc.src.__support.macros.optimization
-    libc.src.__support.macros.properties.types 
+    libc.src.__support.macros.properties.types
 )
 
 add_object_library(
@@ -4093,7 +4085,7 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.polyeval
     libc.src.__support.FPUtil.sqrt
     libc.src.__support.macros.optimization
-    libc.src.__support.macros.properties.types  
+    libc.src.__support.macros.properties.types
 )
 
 add_header_library(
@@ -4162,7 +4154,7 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.polyeval
     libc.src.__support.FPUtil.sqrt
     libc.src.__support.macros.optimization
-    libc.src.__support.macros.properties.types  
+    libc.src.__support.macros.properties.types
 )
 
 add_entrypoint_object(
@@ -4181,7 +4173,7 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.polyeval
     libc.src.__support.FPUtil.sqrt
     libc.src.__support.macros.optimization
-    libc.src.__support.macros.properties.types  
+    libc.src.__support.macros.properties.types
     libc.src.__support.macros.properties.cpu_features
 )
 
@@ -4201,7 +4193,7 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.polyeval
     libc.src.__support.FPUtil.sqrt
     libc.src.__support.macros.optimization
-    libc.src.__support.macros.properties.types  
+    libc.src.__support.macros.properties.types
 )
 
 add_header_library(
diff --git a/libc/src/math/generic/exp_utils.cpp b/libc/src/math/generic/exp_utils.cpp
deleted file mode 100644
index cc21637e4c7c0..0000000000000
--- a/libc/src/math/generic/exp_utils.cpp
+++ /dev/null
@@ -1,128 +0,0 @@
-//===-- Implemention of exp and friends' utils ----------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "exp_utils.h"
-#include "src/__support/macros/config.h"
-
-namespace LIBC_NAMESPACE_DECL {
-
-const Exp2fDataTable exp2f_data = {
-    // :tab[i] = uint(2^(i/N)) - (i << 52-BITS)
-    //    used for computing 2^(k/N) for an int |k| < 150 N as
-    //    double(tab[k%N] + (k << 52-BITS))
-    {
-// tab
-#if N == 8
-        0x3ff0000000000000,
-        0x3fef72b83c7d517b,
-        0x3fef06fe0a31b715,
-        0x3feebfdad5362a27,
-        0x3feea09e667f3bcd,
-        0x3feeace5422aa0db,
-        0x3feee89f995ad3ad,
-        0x3fef5818dcfba487,
-#elif N == 16
-        0x3ff0000000000000,
-        0x3fefb5586cf9890f,
-        0x3fef72b83c7d517b,
-        0x3fef387a6e756238,
-        0x3fef06fe0a31b715,
-        0x3feedea64c123422,
-        0x3feebfdad5362a27,
-        0x3feeab07dd485429,
-        0x3feea09e667f3bcd,
-        0x3feea11473eb0187,
-        0x3feeace5422aa0db,
-        0x3feec49182a3f090,
-        0x3feee89f995ad3ad,
-        0x3fef199bdd85529c,
-        0x3fef5818dcfba487,
-        0x3fefa4afa2a490da,
-#elif N == 32
-        0x3ff0000000000000, 0x3fefd9b0d3158574, 0x3fefb5586cf9890f,
-        0x3fef9301d0125b51, 0x3fef72b83c7d517b, 0x3fef54873168b9aa,
-        0x3fef387a6e756238, 0x3fef1e9df51fdee1, 0x3fef06fe0a31b715,
-        0x3feef1a7373aa9cb, 0x3feedea64c123422, 0x3feece086061892d,
-        0x3feebfdad5362a27, 0x3feeb42b569d4f82, 0x3feeab07dd485429,
-        0x3feea47eb03a5585, 0x3feea09e667f3bcd, 0x3fee9f75e8ec5f74,
-        0x3feea11473eb0187, 0x3feea589994cce13, 0x3feeace5422aa0db,
-        0x3feeb737b0cdc5e5, 0x3feec49182a3f090, 0x3feed503b23e255d,
-        0x3feee89f995ad3ad, 0x3feeff76f2fb5e47, 0x3fef199bdd85529c,
-        0x3fef3720dcef9069, 0x3fef5818dcfba487, 0x3fef7c97337b9b5f,
-        0x3fefa4afa2a490da, 0x3fefd0765b6e4540,
-#elif N == 64
-        0x3ff0000000000000, 0x3fefec9a3e778061, 0x3fefd9b0d3158574,
-        0x3fefc74518759bc8, 0x3fefb5586cf9890f, 0x3fefa3ec32d3d1a2,
-        0x3fef9301d0125b51, 0x3fef829aaea92de0, 0x3fef72b83c7d517b,
-        0x3fef635beb6fcb75, 0x3fef54873168b9aa, 0x3fef463b88628cd6,
-        0x3fef387a6e756238, 0x3fef2b4565e27cdd, 0x3fef1e9df51fdee1,
-        0x3fef1285a6e4030b, 0x3fef06fe0a31b715, 0x3feefc08b26416ff,
-        0x3feef1a7373aa9cb, 0x3feee7db34e59ff7, 0x3feedea64c123422,
-        0x3feed60a21f72e2a, 0x3feece086061892d, 0x3feec6a2b5c13cd0,
-        0x3feebfdad5362a27, 0x3feeb9b2769d2ca7, 0x3feeb42b569d4f82,
-        0x3feeaf4736b527da, 0x3feeab07dd485429, 0x3feea76f15ad2148,
-        0x3feea47eb03a5585, 0x3feea23882552225, 0x3feea09e667f3bcd,
-        0x3fee9fb23c651a2f, 0x3fee9f75e8ec5f74, 0x3fee9feb564267c9,
-        0x3feea11473eb0187, 0x3feea2f336cf4e62, 0x3feea589994cce13,
-        0x3feea8d99b4492ed, 0x3feeace5422aa0db, 0x3feeb1ae99157736,
-        0x3feeb737b0cdc5e5, 0x3feebd829fde4e50, 0x3feec49182a3f090,
-        0x3feecc667b5de565, 0x3feed503b23e255d, 0x3feede6b5579fdbf,
-        0x3feee89f995ad3ad, 0x3feef3a2b84f15fb, 0x3feeff76f2fb5e47,
-        0x3fef0c1e904bc1d2, 0x3fef199bdd85529c, 0x3fef27f12e57d14b,
-        0x3fef3720dcef9069, 0x3fef472d4a07897c, 0x3fef5818dcfba487,
-        0x3fef69e603db3285, 0x3fef7c97337b9b5f, 0x3fef902ee78b3ff6,
-        0x3fefa4afa2a490da, 0x3fefba1bee615a27, 0x3fefd0765b6e4540,
-        0x3fefe7c1819e90d8,
-#endif
-    },
-    as_double(0x4338000000000000) / N, // shift_scaled
-    {
-// poly
-#if N == 8
-        as_double(0x3fac6a00335106e2),
-        as_double(0x3fcec0c313449f55),
-        as_double(0x3fe62e431111f69f),
-#elif N == 16
-        as_double(0x3fac6ac6aa313963),
-        as_double(0x3fcebfff4532d9ba),
-        as_double(0x3fe62e43001bc49f),
-#elif N == 32
-        as_double(0x3fac6af84b912394),
-        as_double(0x3fcebfce50fac4f3),
-        as_double(0x3fe62e42ff0c52d6),
-#elif N == 64
-        as_double(0x3fac6b04b4221b2a),
-        as_double(0x3fcebfc213e184d7),
-        as_double(0x3fe62e42fefb5b7f),
-#endif
-    },
-    as_double(0x4338000000000000),     // shift
-    as_double(0x3ff71547652b82fe) * N, // invln2_scaled
-    {
-// poly_scaled
-#if N == 8
-        as_double(0x3fac6a00335106e2) / N / N / N,
-        as_double(0x3fcec0c313449f55) / N / N,
-        as_double(0x3fe62e431111f69f) / N,
-#elif N == 16
-        as_double(0x3fac6ac6aa313963) / N / N / N,
-        as_double(0x3fcebfff4532d9ba) / N / N,
-        as_double(0x3fe62e43001bc49f) / N,
-#elif N == 32
-        as_double(0x3fac6af84b912394) / N / N / N,
-        as_double(0x3fcebfce50fac4f3) / N / N,
-        as_double(0x3fe62e42ff0c52d6) / N,
-#elif N == 64
-        as_double(0x3fac6b04b4221b2a) / N / N / N,
-        as_double(0x3fcebfc213e184d7) / N / N,
-        as_double(0x3fe62e42fefb5b7f) / N,
-#endif
-    },
-};
-
-} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/generic/exp_utils.h b/libc/src/math/generic/exp_utils.h
deleted file mode 100644
index dca9eb7c2d715..0000000000000
--- a/libc/src/math/generic/exp_utils.h
+++ /dev/null
@@ -1,34 +0,0 @@
-//===-- Collection of utils for exp and friends -----------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIBC_SRC_MATH_GENERIC_EXP_UTILS_H
-#define LLVM_LIBC_SRC_MATH_GENERIC_EXP_UTILS_H
-
-#include "src/__support/macros/config.h"
-#include <stdint.h>
-
-#define EXP2F_TABLE_BITS 5
-#define EXP2F_POLY_ORDER 3
-#define N (1 << EXP2F_TABLE_BITS)
-
-namespace LIBC_NAMESPACE_DECL {
-
-struct Exp2fDataTable {
-  uint64_t tab[1 << EXP2F_TABLE_BITS];
-  double shift_scaled;
-  double poly[EXP2F_POLY_ORDER];
-  double shift;
-  double invln2_scaled;
-  double poly_scaled[EXP2F_POLY_ORDER];
-};
-
-extern const Exp2fDataTable exp2f_data;
-
-} // namespace LIBC_NAMESPACE_DECL
-
-#endif // LLVM_LIBC_SRC_MATH_GENERIC_EXP_UTILS_H