[libc-commits] [libc] [libc] Simplify the version guard for mpfr. (PR #146354)

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https://github.com/c8ef created https://github.com/llvm/llvm-project/pull/146354

Instead of manually calculating the major and minor version numbers, we can directly use `MPFR_VERSION_NUM` to simplify this.

>From c4fc9bf1960d2c672e48cc105559744e07fa06a5 Mon Sep 17 00:00:00 2001
From: c8ef <c8ef at outlook.com>
Date: Mon, 30 Jun 2025 22:09:49 +0800
Subject: [PATCH] use MPFR_VERSION_NUM

---
 libc/utils/MPFRWrapper/MPCommon.cpp | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/libc/utils/MPFRWrapper/MPCommon.cpp b/libc/utils/MPFRWrapper/MPCommon.cpp
index ccd4d2d01a4e2..441d5420b278b 100644
--- a/libc/utils/MPFRWrapper/MPCommon.cpp
+++ b/libc/utils/MPFRWrapper/MPCommon.cpp
@@ -73,8 +73,7 @@ MPFRNumber MPFRNumber::acosh() const {
 MPFRNumber MPFRNumber::acospi() const {
   MPFRNumber result(*this);
 
-#if MPFR_VERSION_MAJOR > 4 ||                                                  \
-    (MPFR_VERSION_MAJOR == 4 && MPFR_VERSION_MINOR >= 2)
+#if MPFR_VERSION >= MPFR_VERSION_NUM(4, 2, 0)
   mpfr_acospi(result.value, value, mpfr_rounding);
   return result;
 #else
@@ -150,8 +149,7 @@ MPFRNumber MPFRNumber::cosh() const {
 MPFRNumber MPFRNumber::cospi() const {
   MPFRNumber result(*this);
 
-#if MPFR_VERSION_MAJOR > 4 ||                                                  \
-    (MPFR_VERSION_MAJOR == 4 && MPFR_VERSION_MINOR >= 2)
+#if MPFR_VERSION >= MPFR_VERSION_NUM(4, 2, 0)
   mpfr_cospi(result.value, value, mpfr_rounding);
   return result;
 #else
@@ -195,8 +193,7 @@ MPFRNumber MPFRNumber::exp2() const {
 
 MPFRNumber MPFRNumber::exp2m1() const {
   // TODO: Only use mpfr_exp2m1 once CI and buildbots get MPFR >= 4.2.0.
-#if MPFR_VERSION_MAJOR > 4 ||                                                  \
-    (MPFR_VERSION_MAJOR == 4 && MPFR_VERSION_MINOR >= 2)
+#if MPFR_VERSION >= MPFR_VERSION_NUM(4, 2, 0)
   MPFRNumber result(*this);
   mpfr_exp2m1(result.value, value, mpfr_rounding);
   return result;
@@ -231,8 +228,7 @@ MPFRNumber MPFRNumber::exp10() const {
 
 MPFRNumber MPFRNumber::exp10m1() const {
   // TODO: Only use mpfr_exp10m1 once CI and buildbots get MPFR >= 4.2.0.
-#if MPFR_VERSION_MAJOR > 4 ||                                                  \
-    (MPFR_VERSION_MAJOR == 4 && MPFR_VERSION_MINOR >= 2)
+#if MPFR_VERSION >= MPFR_VERSION_NUM(4, 2, 0)
   MPFRNumber result(*this);
   mpfr_exp10m1(result.value, value, mpfr_rounding);
   return result;
@@ -402,9 +398,7 @@ MPFRNumber MPFRNumber::sin() const {
 MPFRNumber MPFRNumber::sinpi() const {
   MPFRNumber result(*this);
 
-#if MPFR_VERSION_MAJOR > 4 ||                                                  \
-    (MPFR_VERSION_MAJOR == 4 && MPFR_VERSION_MINOR >= 2)
-
+#if MPFR_VERSION >= MPFR_VERSION_NUM(4, 2, 0)
   mpfr_sinpi(result.value, value, mpfr_rounding);
   return result;
 #else
@@ -463,9 +457,7 @@ MPFRNumber MPFRNumber::tanh() const {
 MPFRNumber MPFRNumber::tanpi() const {
   MPFRNumber result(*this);
 
-#if MPFR_VERSION_MAJOR > 4 ||                                                  \
-    (MPFR_VERSION_MAJOR == 4 && MPFR_VERSION_MINOR >= 2)
-
+#if MPFR_VERSION >= MPFR_VERSION_NUM(4, 2, 0)
   mpfr_tanpi(result.value, value, mpfr_rounding);
   return result;
 #else