[libc] Add half-precision math functions to the math header

[leandrolcampos]

This patch adds the exp10f16, exp2f16, expf16, and expm1f16 math functions to the math.h header.

[llvmbot]

@llvm/pr-subscribers-libc

Author: Leandro Lacerda (leandrolcampos)

Changes

This patch adds the exp10f16, exp2f16, expf16, and expm1f16 math functions to the math.h header.

---

Full diff: https://github.com/llvm/llvm-project/pull/155060.diff

1 Files Affected:

• (modified) libc/include/math.yaml (+28)

diff --git a/libc/include/math.yaml b/libc/include/math.yaml
index 60e6265eece75..6f48e0e9fd35f 100644
--- a/libc/include/math.yaml
+++ b/libc/include/math.yaml
@@ -370,6 +370,13 @@ functions:
     return_type: float
     arguments:
       - type: float
+  - name: exp10f16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
   - name: exp10m1f
     standards:
       - stdc
@@ -395,6 +402,13 @@ functions:
     return_type: float
     arguments:
       - type: float
+  - name: exp2f16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
   - name: exp2m1f
     standards:
       - stdc
@@ -414,6 +428,13 @@ functions:
     return_type: float
     arguments:
       - type: float
+  - name: expf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
   - name: expm1
     standards:
       - stdc
@@ -426,6 +447,13 @@ functions:
     return_type: float
     arguments:
       - type: float
+  - name: expm1f16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
   - name: f16add
     standards:
       - llvm_libc_ext