[libc][NFC] Use user defined literals to build 128 and 256 bit constants. #81746

gchatelet · 2024-02-14T15:33:31Z

No description provided.

…nts.

llvmbot · 2024-02-14T15:33:59Z

@llvm/pr-subscribers-libc

Author: Guillaume Chatelet (gchatelet)

Changes

Patch is 363.98 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/81746.diff

15 Files Affected:

(modified) libc/src/__support/integer_literals.h (+4-4)
(modified) libc/src/math/generic/CMakeLists.txt (+24-16)
(modified) libc/src/math/generic/exp.cpp (+10-14)
(modified) libc/src/math/generic/exp10.cpp (+10-10)
(modified) libc/src/math/generic/exp2.cpp (+10-10)
(modified) libc/src/math/generic/expm1.cpp (+11-15)
(modified) libc/src/math/generic/log.cpp (+623-624)
(modified) libc/src/math/generic/log10.cpp (+624-625)
(modified) libc/src/math/generic/log1p.cpp (+467-468)
(modified) libc/src/math/generic/log2.cpp (+622-623)
(modified) libc/test/src/__support/CMakeLists.txt (+3-1)
(modified) libc/test/src/__support/integer_to_string_test.cpp (+26-13)
(modified) libc/test/src/__support/str_to_long_double_test.cpp (+21-27)
(modified) utils/bazel/llvm-project-overlay/libc/BUILD.bazel (+16-8)
(modified) utils/bazel/llvm-project-overlay/libc/test/src/__support/BUILD.bazel (+2)

diff --git a/libc/src/__support/integer_literals.h b/libc/src/__support/integer_literals.h
index c8e965c1a03a05..ace8a948b57aca 100644
--- a/libc/src/__support/integer_literals.h
+++ b/libc/src/__support/integer_literals.h
@@ -22,19 +22,19 @@
 namespace LIBC_NAMESPACE {
 
 LIBC_INLINE constexpr uint8_t operator""_u8(unsigned long long value) {
-  return value;
+  return static_cast<uint8_t>(value);
 }
 
 LIBC_INLINE constexpr uint16_t operator""_u16(unsigned long long value) {
-  return value;
+  return static_cast<uint16_t>(value);
 }
 
 LIBC_INLINE constexpr uint32_t operator""_u32(unsigned long long value) {
-  return value;
+  return static_cast<uint32_t>(value);
 }
 
 LIBC_INLINE constexpr uint64_t operator""_u64(unsigned long long value) {
-  return value;
+  return static_cast<uint64_t>(value);
 }
 
 namespace internal {
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index fdf383f070697e..ab7f5a91ab7bac 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -622,6 +622,8 @@ add_entrypoint_object(
   DEPENDS
     .common_constants
     .explogxf
+    libc.include.errno
+    libc.include.math
     libc.src.__support.CPP.bit
     libc.src.__support.CPP.optional
     libc.src.__support.FPUtil.dyadic_float
@@ -632,10 +634,9 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.polyeval
     libc.src.__support.FPUtil.rounding_mode
     libc.src.__support.FPUtil.triple_double
+    libc.src.__support.integer_literals
     libc.src.__support.macros.optimization
-    libc.include.errno
     libc.src.errno.errno
-    libc.include.math
   COMPILE_OPTIONS
     -O3
 )
@@ -672,6 +673,8 @@ add_entrypoint_object(
   DEPENDS
     .common_constants
     .explogxf
+    libc.include.errno
+    libc.include.math
     libc.src.__support.CPP.bit
     libc.src.__support.CPP.optional
     libc.src.__support.FPUtil.dyadic_float
@@ -682,10 +685,9 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.polyeval
     libc.src.__support.FPUtil.rounding_mode
     libc.src.__support.FPUtil.triple_double
+    libc.src.__support.integer_literals
     libc.src.__support.macros.optimization
-    libc.include.errno
     libc.src.errno.errno
-    libc.include.math
   COMPILE_OPTIONS
     -O3
 )
@@ -731,6 +733,8 @@ add_entrypoint_object(
   DEPENDS
     .common_constants
     .explogxf
+    libc.include.errno
+    libc.include.math
     libc.src.__support.CPP.bit
     libc.src.__support.CPP.optional
     libc.src.__support.FPUtil.dyadic_float
@@ -741,10 +745,9 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.polyeval
     libc.src.__support.FPUtil.rounding_mode
     libc.src.__support.FPUtil.triple_double
+    libc.src.__support.integer_literals
     libc.src.__support.macros.optimization
-    libc.include.errno
     libc.src.errno.errno
-    libc.include.math
   COMPILE_OPTIONS
     -O3
 )
@@ -791,6 +794,8 @@ add_entrypoint_object(
   DEPENDS
     .common_constants
     .explogxf
+    libc.include.errno
+    libc.include.math
     libc.src.__support.CPP.bit
     libc.src.__support.CPP.optional
     libc.src.__support.FPUtil.dyadic_float
@@ -801,10 +806,9 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.polyeval
     libc.src.__support.FPUtil.rounding_mode
     libc.src.__support.FPUtil.triple_double
+    libc.src.__support.integer_literals
     libc.src.__support.macros.optimization
-    libc.include.errno
     libc.src.errno.errno
-    libc.include.math
   COMPILE_OPTIONS
     -O3
 )
@@ -1061,12 +1065,13 @@ add_entrypoint_object(
   DEPENDS
     .common_constants
     .log_range_reduction
+    libc.src.__support.FPUtil.double_double
+    libc.src.__support.FPUtil.dyadic_float
     libc.src.__support.FPUtil.fenv_impl
     libc.src.__support.FPUtil.fp_bits
     libc.src.__support.FPUtil.multiply_add
     libc.src.__support.FPUtil.polyeval
-    libc.src.__support.FPUtil.double_double
-    libc.src.__support.FPUtil.dyadic_float
+    libc.src.__support.integer_literals
     libc.src.__support.macros.optimization
   COMPILE_OPTIONS
     -O3
@@ -1097,12 +1102,13 @@ add_entrypoint_object(
     ../log1p.h
   DEPENDS
     .common_constants
+    libc.src.__support.FPUtil.double_double
+    libc.src.__support.FPUtil.dyadic_float
     libc.src.__support.FPUtil.fenv_impl
     libc.src.__support.FPUtil.fp_bits
     libc.src.__support.FPUtil.multiply_add
     libc.src.__support.FPUtil.polyeval
-    libc.src.__support.FPUtil.double_double
-    libc.src.__support.FPUtil.dyadic_float
+    libc.src.__support.integer_literals
     libc.src.__support.macros.optimization
   COMPILE_OPTIONS
     -O3
@@ -1135,12 +1141,13 @@ add_entrypoint_object(
   DEPENDS
     .common_constants
     .log_range_reduction
+    libc.src.__support.FPUtil.double_double
+    libc.src.__support.FPUtil.dyadic_float
     libc.src.__support.FPUtil.fenv_impl
     libc.src.__support.FPUtil.fp_bits
     libc.src.__support.FPUtil.multiply_add
     libc.src.__support.FPUtil.polyeval
-    libc.src.__support.FPUtil.double_double
-    libc.src.__support.FPUtil.dyadic_float
+    libc.src.__support.integer_literals
     libc.src.__support.macros.optimization
   COMPILE_OPTIONS
     -O3
@@ -1173,12 +1180,13 @@ add_entrypoint_object(
   DEPENDS
     .common_constants
     .log_range_reduction
+    libc.src.__support.FPUtil.double_double
+    libc.src.__support.FPUtil.dyadic_float
     libc.src.__support.FPUtil.fenv_impl
     libc.src.__support.FPUtil.fp_bits
     libc.src.__support.FPUtil.multiply_add
     libc.src.__support.FPUtil.polyeval
-    libc.src.__support.FPUtil.double_double
-    libc.src.__support.FPUtil.dyadic_float
+    libc.src.__support.integer_literals
     libc.src.__support.macros.optimization
   COMPILE_OPTIONS
     -O3
diff --git a/libc/src/math/generic/exp.cpp b/libc/src/math/generic/exp.cpp
index f23170f8ed4259..ccb77fc6c8f70a 100644
--- a/libc/src/math/generic/exp.cpp
+++ b/libc/src/math/generic/exp.cpp
@@ -21,6 +21,7 @@
 #include "src/__support/FPUtil/rounding_mode.h"
 #include "src/__support/FPUtil/triple_double.h"
 #include "src/__support/common.h"
+#include "src/__support/integer_literals.h"
 #include "src/__support/macros/optimization.h" // LIBC_UNLIKELY
 
 #include <errno.h>
@@ -31,6 +32,7 @@ using fputil::DoubleDouble;
 using fputil::TripleDouble;
 using Float128 = typename fputil::DyadicFloat<128>;
 using Sign = fputil::Sign;
+using LIBC_NAMESPACE::operator""_u128;
 
 // log2(e)
 constexpr double LOG2_E = 0x1.71547652b82fep+0;
@@ -97,21 +99,15 @@ DoubleDouble poly_approx_dd(const DoubleDouble &dx) {
 // For |dx| < 2^-13 + 2^-30:
 //   | output - exp(dx) | < 2^-126.
 Float128 poly_approx_f128(const Float128 &dx) {
-  using MType = typename Float128::MantissaType;
-
   constexpr Float128 COEFFS_128[]{
-      {Sign::POS, -127, MType({0, 0x8000000000000000})},                  // 1.0
-      {Sign::POS, -127, MType({0, 0x8000000000000000})},                  // 1.0
-      {Sign::POS, -128, MType({0, 0x8000000000000000})},                  // 0.5
-      {Sign::POS, -130, MType({0xaaaaaaaaaaaaaaab, 0xaaaaaaaaaaaaaaaa})}, // 1/6
-      {Sign::POS, -132,
-       MType({0xaaaaaaaaaaaaaaab, 0xaaaaaaaaaaaaaaaa})}, // 1/24
-      {Sign::POS, -134,
-       MType({0x8888888888888889, 0x8888888888888888})}, // 1/120
-      {Sign::POS, -137,
-       MType({0x60b60b60b60b60b6, 0xb60b60b60b60b60b})}, // 1/720
-      {Sign::POS, -140,
-       MType({0x00d00d00d00d00d0, 0xd00d00d00d00d00d})}, // 1/5040
+      {Sign::POS, -127, 0x80000000000000000000000000000000_u128}, // 1.0
+      {Sign::POS, -127, 0x80000000000000000000000000000000_u128}, // 1.0
+      {Sign::POS, -128, 0x80000000000000000000000000000000_u128}, // 0.5
+      {Sign::POS, -130, 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab_u128}, // 1/6
+      {Sign::POS, -132, 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab_u128}, // 1/24
+      {Sign::POS, -134, 0x88888888888888888888888888888889_u128}, // 1/120
+      {Sign::POS, -137, 0xb60b60b60b60b60b60b60b60b60b60b6_u128}, // 1/720
+      {Sign::POS, -140, 0xd00d00d00d00d00d00d00d00d00d00d0_u128}, // 1/5040
   };
 
   Float128 p = fputil::polyeval(dx, COEFFS_128[0], COEFFS_128[1], COEFFS_128[2],
diff --git a/libc/src/math/generic/exp10.cpp b/libc/src/math/generic/exp10.cpp
index 6b40f5561845d8..069141a2eeabb6 100644
--- a/libc/src/math/generic/exp10.cpp
+++ b/libc/src/math/generic/exp10.cpp
@@ -21,6 +21,7 @@
 #include "src/__support/FPUtil/rounding_mode.h"
 #include "src/__support/FPUtil/triple_double.h"
 #include "src/__support/common.h"
+#include "src/__support/integer_literals.h"
 #include "src/__support/macros/optimization.h" // LIBC_UNLIKELY
 
 #include <errno.h>
@@ -31,6 +32,7 @@ using fputil::DoubleDouble;
 using fputil::TripleDouble;
 using Float128 = typename fputil::DyadicFloat<128>;
 using Sign = fputil::Sign;
+using LIBC_NAMESPACE::operator""_u128;
 
 // log2(10)
 constexpr double LOG2_10 = 0x1.a934f0979a371p+1;
@@ -99,17 +101,15 @@ DoubleDouble poly_approx_dd(const DoubleDouble &dx) {
 // For |dx| < 2^-14:
 //   | output - 10^dx | < 1.5 * 2^-124.
 Float128 poly_approx_f128(const Float128 &dx) {
-  using MType = typename Float128::MantissaType;
-
   constexpr Float128 COEFFS_128[]{
-      {Sign::POS, -127, MType({0, 0x8000000000000000})}, // 1.0
-      {Sign::POS, -126, MType({0xea56d62b82d30a2d, 0x935d8dddaaa8ac16})},
-      {Sign::POS, -126, MType({0x80a99ce75f4d5bdb, 0xa9a92639e753443a})},
-      {Sign::POS, -126, MType({0x6a4f9d7dbf6c9635, 0x82382c8ef1652304})},
-      {Sign::POS, -124, MType({0x345787019216c7af, 0x12bd7609fd98c44c})},
-      {Sign::POS, -127, MType({0xcc41ed7e0d27aee5, 0x450a7ff47535d889})},
-      {Sign::POS, -130, MType({0x8326bb91a6e7601d, 0xd3f6b844702d636b})},
-      {Sign::POS, -130, MType({0xfa7b46df314112a9, 0x45b937f0d05bb1cd})},
+      {Sign::POS, -127, 0x00000000000000080000000000000000_u128}, // 1.0
+      {Sign::POS, -126, 0x935d8dddaaa8ac16ea56d62b82d30a2d_u128},
+      {Sign::POS, -126, 0xa9a92639e753443a80a99ce75f4d5bdb_u128},
+      {Sign::POS, -126, 0x82382c8ef16523046a4f9d7dbf6c9635_u128},
+      {Sign::POS, -124, 0x12bd7609fd98c44c345787019216c7af_u128},
+      {Sign::POS, -127, 0x450a7ff47535d889cc41ed7e0d27aee5_u128},
+      {Sign::POS, -130, 0xd3f6b844702d636b8326bb91a6e7601d_u128},
+      {Sign::POS, -130, 0x45b937f0d05bb1cdfa7b46df314112a9_u128},
   };
 
   Float128 p = fputil::polyeval(dx, COEFFS_128[0], COEFFS_128[1], COEFFS_128[2],
diff --git a/libc/src/math/generic/exp2.cpp b/libc/src/math/generic/exp2.cpp
index 01e66d1ae00f70..e9d4623b2faf21 100644
--- a/libc/src/math/generic/exp2.cpp
+++ b/libc/src/math/generic/exp2.cpp
@@ -21,6 +21,7 @@
 #include "src/__support/FPUtil/rounding_mode.h"
 #include "src/__support/FPUtil/triple_double.h"
 #include "src/__support/common.h"
+#include "src/__support/integer_literals.h"
 #include "src/__support/macros/optimization.h" // LIBC_UNLIKELY
 
 #include <errno.h>
@@ -31,6 +32,7 @@ using fputil::DoubleDouble;
 using fputil::TripleDouble;
 using Float128 = typename fputil::DyadicFloat<128>;
 using Sign = fputil::Sign;
+using LIBC_NAMESPACE::operator""_u128;
 
 // Error bounds:
 // Errors when using double precision.
@@ -88,17 +90,15 @@ DoubleDouble poly_approx_dd(const DoubleDouble &dx) {
 // For |dx| < 2^-13 + 2^-30:
 //   | output - exp(dx) | < 2^-126.
 Float128 poly_approx_f128(const Float128 &dx) {
-  using MType = typename Float128::MantissaType;
-
   constexpr Float128 COEFFS_128[]{
-      {Sign::POS, -127, MType({0, 0x8000000000000000})}, // 1.0
-      {Sign::POS, -128, MType({0xc9e3b39803f2f6af, 0xb17217f7d1cf79ab})},
-      {Sign::POS, -128, MType({0xde2d60dd9c9a1d9f, 0x3d7f7bff058b1d50})},
-      {Sign::POS, -132, MType({0x9d3b15d9e7fb6897, 0xe35846b82505fc59})},
-      {Sign::POS, -134, MType({0x184462f6bcd2b9e7, 0x9d955b7dd273b94e})},
-      {Sign::POS, -137, MType({0x39ea1bb964c51a89, 0xaec3ff3c53398883})},
-      {Sign::POS, -138, MType({0x842c53418fa8ae61, 0x2861225f345c396a})},
-      {Sign::POS, -144, MType({0x7abeb5abd5ad2079, 0xffe5fe2d109a319d})},
+      {Sign::POS, -127, 0x80000000000000000000000000000000_u128}, // 1.0
+      {Sign::POS, -128, 0xb17217f7d1cf79abc9e3b39803f2f6af_u128},
+      {Sign::POS, -128, 0x3d7f7bff058b1d50de2d60dd9c9a1d9f_u128},
+      {Sign::POS, -132, 0xe35846b82505fc599d3b15d9e7fb6897_u128},
+      {Sign::POS, -134, 0x9d955b7dd273b94e184462f6bcd2b9e7_u128},
+      {Sign::POS, -137, 0xaec3ff3c5339888339ea1bb964c51a89_u128},
+      {Sign::POS, -138, 0x2861225f345c396a842c53418fa8ae61_u128},
+      {Sign::POS, -144, 0xffe5fe2d109a319d7abeb5abd5ad2079_u128},
   };
 
   Float128 p = fputil::polyeval(dx, COEFFS_128[0], COEFFS_128[1], COEFFS_128[2],
diff --git a/libc/src/math/generic/expm1.cpp b/libc/src/math/generic/expm1.cpp
index c1fb80309d7b46..cde09578d15726 100644
--- a/libc/src/math/generic/expm1.cpp
+++ b/libc/src/math/generic/expm1.cpp
@@ -22,6 +22,7 @@
 #include "src/__support/FPUtil/rounding_mode.h"
 #include "src/__support/FPUtil/triple_double.h"
 #include "src/__support/common.h"
+#include "src/__support/integer_literals.h"
 #include "src/__support/macros/optimization.h" // LIBC_UNLIKELY
 
 #include <errno.h>
@@ -39,6 +40,7 @@ using fputil::DoubleDouble;
 using fputil::TripleDouble;
 using Float128 = typename fputil::DyadicFloat<128>;
 using Sign = fputil::Sign;
+using LIBC_NAMESPACE::operator""_u128;
 
 // log2(e)
 constexpr double LOG2_E = 0x1.71547652b82fep+0;
@@ -107,20 +109,14 @@ DoubleDouble poly_approx_dd(const DoubleDouble &dx) {
 // For |dx| < 2^-13 + 2^-30:
 //   | output - exp(dx) | < 2^-126.
 Float128 poly_approx_f128(const Float128 &dx) {
-  using MType = typename Float128::MantissaType;
-
   constexpr Float128 COEFFS_128[]{
-      {Sign::POS, -127, MType({0, 0x8000000000000000})},                  // 1.0
-      {Sign::POS, -128, MType({0, 0x8000000000000000})},                  // 0.5
-      {Sign::POS, -130, MType({0xaaaaaaaaaaaaaaab, 0xaaaaaaaaaaaaaaaa})}, // 1/6
-      {Sign::POS, -132,
-       MType({0xaaaaaaaaaaaaaaab, 0xaaaaaaaaaaaaaaaa})}, // 1/24
-      {Sign::POS, -134,
-       MType({0x8888888888888889, 0x8888888888888888})}, // 1/120
-      {Sign::POS, -137,
-       MType({0x60b60b60b60b60b6, 0xb60b60b60b60b60b})}, // 1/720
-      {Sign::POS, -140,
-       MType({0x00d00d00d00d00d0, 0xd00d00d00d00d00d})}, // 1/5040
+      {Sign::POS, -127, 0x80000000000000000000000000000000_u128}, // 1.0
+      {Sign::POS, -128, 0x80000000000000000000000000000000_u128}, // 0.5
+      {Sign::POS, -130, 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab_u128}, // 1/6
+      {Sign::POS, -132, 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab_u128}, // 1/24
+      {Sign::POS, -134, 0x88888888888888888888888888888889_u128}, // 1/120
+      {Sign::POS, -137, 0xb60b60b60b60b60b60b60b60b60b60b6_u128}, // 1/720
+      {Sign::POS, -140, 0xd00d00d00d00d00d00d00d00d00d00d0_u128}, // 1/5040
   };
 
   Float128 p = fputil::polyeval(dx, COEFFS_128[0], COEFFS_128[1], COEFFS_128[2],
@@ -146,7 +142,6 @@ std::ostream &operator<<(std::ostream &OS, const DoubleDouble &r) {
 // TODO(lntue): investigate triple-double precision implementation for this
 // step.
 Float128 expm1_f128(double x, double kd, int idx1, int idx2) {
-  using MType = typename Float128::MantissaType;
   // Recalculate dx:
 
   double t1 = fputil::multiply_add(kd, MLOG_2_EXP2_M12_HI, x); // exact
@@ -170,7 +165,8 @@ Float128 expm1_f128(double x, double kd, int idx1, int idx2) {
   Float128 exp_mid = fputil::quick_mul(exp_mid1, exp_mid2);
 
   int hi = static_cast<int>(kd) >> 12;
-  Float128 minus_one{Sign::NEG, -127 - hi, MType({0, 0x8000000000000000})};
+  Float128 minus_one{Sign::NEG, -127 - hi,
+                     0x80000000000000000000000000000000_u128};
 
   Float128 exp_mid_m1 = fputil::quick_add(exp_mid, minus_one);
 
diff --git a/libc/src/math/generic/log.cpp b/libc/src/math/generic/log.cpp
index 9edc52b8a8e24c..a4b6aba160fdce 100644
--- a/libc/src/math/generic/log.cpp
+++ b/libc/src/math/generic/log.cpp
@@ -14,6 +14,7 @@
 #include "src/__support/FPUtil/dyadic_float.h"
 #include "src/__support/FPUtil/multiply_add.h"
 #include "src/__support/common.h"
+#include "src/__support/integer_literals.h"
 #include "src/__support/macros/optimization.h" // LIBC_UNLIKELY
 
 #include "common_constants.h"
@@ -23,8 +24,8 @@ namespace LIBC_NAMESPACE {
 
 // 128-bit precision dyadic floating point numbers.
 using Float128 = typename fputil::DyadicFloat<128>;
-using MType = typename Float128::MantissaType;
 using Sign = fputil::Sign;
+using LIBC_NAMESPACE::operator""_u128;
 
 namespace {
 
@@ -36,9 +37,9 @@ constexpr double P_ERR = 0x1.0p-50;
 
 // log(2) with 128-bit prepcision generated by SageMath with:
 //   sage: (s, m, e) = RealField(128)(2).log().sign_mantissa_exponent();
-//   sage: print("MType({", hex(m % 2^64), ",", hex((m >> 64) % 2^64), "})");
+//   sage: print(hex(m), "_u128");
 const Float128 LOG_2(Sign::POS, /*exponent=*/-128, /*mantissa=*/
-                     MType({0xc9e3b39803f2f6af, 0xb17217f7d1cf79ab}));
+                     0xb17217f7d1cf79abc9e3b39803f2f6af_u128);
 
 alignas(64) const LogRR LOG_TABLE = {
     // -log(r) with 128-bit precision generated by SageMath with:
@@ -46,138 +47,136 @@ alignas(64) const LogRR LOG_TABLE = {
     // for i in range(128):
     //   r = 2^-8 * ceil( 2^8 * (1 - 2^(-8)) / (1 + i*2^(-7)) );
     //   s, m, e = RealField(128)(r).log().sign_mantissa_exponent();
-    //   print("{Sign::POS,", e, ", MType({", hex(m % 2^64), ",", hex((m >> 64)
-    //   % 2^64),
-    //         "})},");
+    //   print("{Sign::POS,", e, ", hex(m), "_u128},");
     /* .step_1= */ {
-        {Sign::POS, 0, MType(0)},
-        {Sign::POS, -134, MType({0x662d417ced007a46, 0x8080abac46f38946})},
-        {Sign::POS, -133, MType({0x91d082dce3ddcd38, 0x8102b2c49ac23a4f})},
-        {Sign::POS, -133, MType({0xda5f3cc0b3251dbd, 0xc24929464655f45c})},
-        {Sign::POS, -132, MType({0xb9e3aea6c444ef07, 0x820aec4f3a222380})},
-        {Sign::POS, -132, MType({0x521016bd904dc968, 0xa33576a16f1f4c64})},
-        {Sign::POS, -132, MType({0xbe97660a23cc540d, 0xc4a550a4fd9a19a8})},
-        {Sign::POS, -132, MType({0xe09f5fe2058d6006, 0xe65b9e6eed965c36})},
-        {Sign::POS, -131, MType({0x1fecdfa819b96098, 0x842cc5acf1d03445})},
-        {Sign::POS, -131, MType({0xa7c9859530a45153, 0x8cb9de8a32ab368a})},
-        {Sign::POS, -131, MType({0x976d3b5b45f6ca0b, 0x9defad3e8f73217a})},
-        {Sign::POS, -131, MType({0xe8b8b88a14ff0ce, 0xaf4ad26cbc8e5be7})},
-        {Sign::POS, -131, MType({0x6a677b4c8bec22e1, 0xb8069857560707a3})},
-        {Sign::POS, -131, MType({0xeaf51f66692844ba, 0xc99af2eaca4c4570})},
-        {Sign::POS, -131, MType({0xa8112e35a60e6375, 0xdb56446d6ad8deff})},
-        {Sign::POS, -131, MType({0x196ab34ce0bccd12, 0xe442c00de2591b47})},
-        {Sign::POS, -131, MType({0x4066e87f2c0f7340, 0xf639cc185088fe5d})},
-        {Sign::POS, -131, MType({0xc17bd40d8d9291ec, 0xff4489cedeab2ca6})},
-        {Sign::POS, -130, MType({0x9c5a0fe396f40f1e, 0x88bc74113f23def1})},
-        {Sign::POS, -130, MType({0x88713268840cbcc0, 0x8d515bf11fb94f1c})},
-        {Sign::POS, -130, MType({0x65c0da506a088484, 0x968b08643409ceb6})},
-        {Sign::POS, -130, MType({0x411a5b944aca8708, 0x9b2fe580ac80b17d})},
-        {Sign::POS, -130, MType({0xa9fb6cf0ecb411b7, 0xa489ec199dab06f2})},
-        {Sign::POS, -130, MType({0xcad2fb8d48054ae0, 0xa93f2f250dac67d1})},
-        {Sign::POS, -130, MType({0x2c3c2e77904afa78, 0xb2ba75f46099cf8b})},
-        {Sign::POS, -130, MType({0x34c7bc3d32750fde, 0xb780945bab55dce4})},
-        {Sign::POS, -130, MType({0x9a631e830fd30904, 0xc11e0b2a8d1e0ddb})},
-        {Sign::POS, -130, MType({0xaa8b6997a402bf30, 0xc5f57f59c7f46155})},
-        {Sign::POS, -130, MType({0x2c507fb7a3d0bf6a, 0xcad2d6e7b80bf914})},
-        {Sign::POS, -130, MType({0x5f53bd2e406e66e7, 0xd49f69e456cf1b79})},
-        {Sign::POS, -130, MType({0x58a98f2ad65bee9b, 0xd98ec2bade71e539})},
-        {Sign::POS, -130, MType({0x4d57da945b5d0aaa, 0xde8439c1dec56877})},
-        {Sign::POS, -130, MType({0xc524848e3443e040, 0xe881bf932af3dac0})},
-        {Sign::POS, -130, MType({0x11d49f96cb88317b, 0xed89ed86a44a01aa})},
-        {Sign::POS, -130, MType({0x3b020fa1820c9492, 0xf29877ff38809091})},
-        {Sign::POS, -130, MType({0x54d2238f75f969b1, 0xf7ad6f26e7ff2ef7})},
-        {Sign::POS, -130, MType({0xca0cdf301431b60f, 0xfcc8e3659d9bcbec})},
-        {Sign::POS, -129, MType({0x62dda9d2270fa1f4, 0x8389c3026ac3139b})},
-        {Sign::POS, -129, MType({0x163ceae88f720f1e, 0x86216b3b0b17188b})}...
[truncated]

gchatelet · 2024-02-14T15:41:31Z

Most of the change is done via sed so it should be safe.
I will run it on an aarch64 machine to make sure all the tests are exercised.

lntue · 2024-02-14T16:01:24Z

I'm sorry for asking a bit late, but is it easy to add ' to divide 128-bit and 256-bit numbers into 32-bit or 64-bit chunks?

gchatelet · 2024-02-14T16:19:34Z

I'm sorry for asking a bit late, but is it easy to add ' to divide 128-bit and 256-bit numbers into 32-bit or 64-bit chunks?

Sure no worries, which one do you want 64 or 32?
Shall I also fix the sage scripts?

lntue · 2024-02-14T16:39:33Z

I'm sorry for asking a bit late, but is it easy to add ' to divide 128-bit and 256-bit numbers into 32-bit or 64-bit chunks?

Sure no worries, which one do you want 64 or 32? Shall I also fix the sage scripts?

I prefer 32-bit chunks if it does not push the constants to the next line. Otherwise, 64-bit chunks works fine too.
It would be great for the sage scripts to be updated. Thanks!

lntue

Thanks for cleaning this up! It looks much better now!

gchatelet · 2024-02-14T17:12:45Z

I used this function and updated the documentation
https://sagecell.sagemath.org/?q=neiiww

I haven't checked the scripts but they should be just a typo away from working 😅

nickdesaulniers · 2024-02-14T17:42:27Z

libc/src/__support/integer_literals.h

@@ -76,7 +76,7 @@ template <typename T, int base> struct DigitBuffer {
  // Returns the digit for a particular character.
  // Returns 255 if the character is invalid.
  LIBC_INLINE static constexpr uint8_t get_digit_value(const char c) {
-    const auto to_lower = [](char c) { return c | 32; };
+    const auto to_lower = [](char c) -> uint8_t { return c | 32; };
    const auto is_digit = [](char c) { return c >= '0' && c <= '9'; };
    const auto is_alpha = [](char c) {
      return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');


Seems like this is producing an error on the gcc build bots:

/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/src/__support/integer_literals.h:85:16: error: conversion from ‘int’ to ‘uint8_t’ {aka ‘unsigned char’} may change value [-Werror=conversion] 85 | return c - '0'; | ~~^~~~~

Yes just noticed, I'll revert, I don't have time to fix it now.

…t constants." (#81771) Reverts #81746

…t constants This is a reland of llvm#81746

…t constants (#81835) This is a reland of #81746

…t constants (llvm#81835) This is a reland of llvm#81746

[libc][NFC] Use user defined literals to build 128 and 256 bit consta…

2ede37b

…nts.

llvmbot added the libc label Feb 14, 2024

Remove unrelated modification

fb3a20f

gchatelet requested a review from lntue February 14, 2024 15:39

Fix integer promotion issues

1512f4d

Separate literals every 32 bits

e91fd21

Fixing one misreplacement (this one was manual...)

25f7214

lntue approved these changes Feb 14, 2024

View reviewed changes

Update Sage scripts

9d5e071

gchatelet merged commit 411554a into llvm:main Feb 14, 2024
4 checks passed

gchatelet deleted the use_u128_instead_of_mtype branch February 14, 2024 17:36

nickdesaulniers reviewed Feb 14, 2024

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gchatelet mentioned this pull request Feb 14, 2024

Revert "[libc][NFC] Use user defined literals to build 128 and 256 bit constants." #81771

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gchatelet added a commit that referenced this pull request Feb 14, 2024

Revert "[libc][NFC] Use user defined literals to build 128 and 256 bi…

78d401b

…t constants." (#81771) Reverts #81746

gchatelet added a commit to gchatelet/llvm-project that referenced this pull request Feb 15, 2024

[reland][libc][NFC] Use user defined literals to build 128 and 256 bi…

90ee62b

…t constants This is a reland of llvm#81746

gchatelet mentioned this pull request Feb 15, 2024

[reland][libc][NFC] Use user defined literals to build 128 and 256 bit constants #81835

Merged

gchatelet added a commit that referenced this pull request Feb 15, 2024

[reland][libc][NFC] Use user defined literals to build 128 and 256 bi…

513e4dc

…t constants (#81835) This is a reland of #81746

gchatelet added a commit to gchatelet/llvm-project that referenced this pull request Feb 16, 2024

[reland][libc][NFC] Use user defined literals to build 128 and 256 bi…

3aec267

…t constants (llvm#81835) This is a reland of llvm#81746

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[libc][NFC] Use user defined literals to build 128 and 256 bit constants. #81746

[libc][NFC] Use user defined literals to build 128 and 256 bit constants. #81746

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[libc][NFC] Use user defined literals to build 128 and 256 bit constants. #81746

[libc][NFC] Use user defined literals to build 128 and 256 bit constants. #81746

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