[libc][math] Implement acoshf function correctly rounded to all rounding modes.

Implement acoshf function correctly rounded to all rounding modes.

Reviewed By: zimmermann6

Differential Revision: https://reviews.llvm.org/D142781

2 files changed, 10 insertions, 0 deletions

diff --git a/libc/utils/MPFRWrapper/MPFRUtils.cpp b/libc/utils/MPFRWrapper/MPFRUtils.cpp
index f1f0fd9a66e0..2b44c2493f02 100644
--- a/libc/utils/MPFRWrapper/MPFRUtils.cpp
+++ b/libc/utils/MPFRWrapper/MPFRUtils.cpp
@@ -190,6 +190,12 @@ public:
     return result;
   }
 
+  MPFRNumber acosh() const {
+    MPFRNumber result(*this);
+    mpfr_acosh(result.value, value, mpfr_rounding);
+    return result;
+  }
+
   MPFRNumber asin() const {
     MPFRNumber result(*this);
     mpfr_asin(result.value, value, mpfr_rounding);
@@ -201,6 +207,7 @@ public:
     mpfr_asinh(result.value, value, mpfr_rounding);
     return result;
   }
+
   MPFRNumber atan() const {
     MPFRNumber result(*this);
     mpfr_atan(result.value, value, mpfr_rounding);
@@ -545,6 +552,8 @@ unary_operation(Operation op, InputType input, unsigned int precision,
     return mpfrInput.abs();
   case Operation::Acos:
     return mpfrInput.acos();
+  case Operation::Acosh:
+    return mpfrInput.acosh();
   case Operation::Asin:
     return mpfrInput.asin();
   case Operation::Asinh:
diff --git a/libc/utils/MPFRWrapper/MPFRUtils.h b/libc/utils/MPFRWrapper/MPFRUtils.h
index 35e1606b1cce..dbb9b410d1b1 100644
--- a/libc/utils/MPFRWrapper/MPFRUtils.h
+++ b/libc/utils/MPFRWrapper/MPFRUtils.h
@@ -26,6 +26,7 @@ enum class Operation : int {
   BeginUnaryOperationsSingleOutput,
   Abs,
   Acos,
+  Acosh,
   Asin,
   Asinh,
   Atan,