From 159568a05a222681f54a27310ac15c3043563f95 Mon Sep 17 00:00:00 2001
From: mihael <hi@mihaelm.com>
Date: Tue, 10 Mar 2026 00:09:00 +0100
Subject: [PATCH] Reimplement `coshf` in `libzigc`

The function basically calls the Zig std's implementation.

The changes were tested by running:

```
$ ./build/stage3/bin/zig build -p stage4 -Denable-llvm -Dno-lib

$ stage4/bin/zig build test-libc -Dlibc-test-path=<LIBC-TEST-PATH> -Dtest-filter=coshf -fqemu -fwasmtime --summary line
Build Summary: 553/553 steps succeeded
```
---
 lib/c/math.zig                                |  5 +++
 lib/libc/mingw/math/coshf.c                   | 10 -----
 lib/libc/musl/src/math/coshf.c                | 33 -----------------
 .../wasi/libc-top-half/musl/src/math/coshf.c  | 37 -------------------
 src/libs/mingw.zig                            |  1 -
 src/libs/musl.zig                             |  1 -
 src/libs/wasi_libc.zig                        |  1 -
 7 files changed, 5 insertions(+), 83 deletions(-)
 delete mode 100644 lib/libc/mingw/math/coshf.c
 delete mode 100644 lib/libc/musl/src/math/coshf.c
 delete mode 100644 lib/libc/wasi/libc-top-half/musl/src/math/coshf.c

diff --git a/lib/c/math.zig b/lib/c/math.zig
index ae3491e430c4cb433ab01430b93193ed732ed14b..281b898ac2061cdad1c41a9fe56361ae9724a3f7 100644
--- a/lib/c/math.zig
+++ b/lib/c/math.zig
@@ -31,6 +31,7 @@ comptime {
     }
 
     if (builtin.target.isMinGW() or builtin.target.isMuslLibC() or builtin.target.isWasiLibC()) {
+        symbol(&coshf, "coshf");
         symbol(&hypotf, "hypotf");
         symbol(&hypotl, "hypotl");
         symbol(&nan, "nan");
@@ -130,6 +131,10 @@ fn cosh(x: f64) callconv(.c) f64 {
     return math.cosh(x);
 }
 
+fn coshf(x: f32) callconv(.c) f32 {
+    return math.cosh(x);
+}
+
 fn cbrt(x: f64) callconv(.c) f64 {
     return math.cbrt(x);
 }
diff --git a/lib/libc/mingw/math/coshf.c b/lib/libc/mingw/math/coshf.c
deleted file mode 100644
index 72147f5bfbcb77fdb2754e876472f33583ae2756..0000000000000000000000000000000000000000
--- a/lib/libc/mingw/math/coshf.c
+++ /dev/null
@@ -1,10 +0,0 @@
-/**
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is part of the mingw-w64 runtime package.
- * No warranty is given; refer to the file DISCLAIMER.PD within this package.
- */
-#include <math.h>
-float coshf (float x)
-{
-  return (float) cosh (x);
-}
diff --git a/lib/libc/musl/src/math/coshf.c b/lib/libc/musl/src/math/coshf.c
deleted file mode 100644
index e739cff93b1325f931198d8d75b3313359803752..0000000000000000000000000000000000000000
--- a/lib/libc/musl/src/math/coshf.c
+++ /dev/null
@@ -1,33 +0,0 @@
-#include "libm.h"
-
-float coshf(float x)
-{
-	union {float f; uint32_t i;} u = {.f = x};
-	uint32_t w;
-	float t;
-
-	/* |x| */
-	u.i &= 0x7fffffff;
-	x = u.f;
-	w = u.i;
-
-	/* |x| < log(2) */
-	if (w < 0x3f317217) {
-		if (w < 0x3f800000 - (12<<23)) {
-			FORCE_EVAL(x + 0x1p120f);
-			return 1;
-		}
-		t = expm1f(x);
-		return 1 + t*t/(2*(1+t));
-	}
-
-	/* |x| < log(FLT_MAX) */
-	if (w < 0x42b17217) {
-		t = expf(x);
-		return 0.5f*(t + 1/t);
-	}
-
-	/* |x| > log(FLT_MAX) or nan */
-	t = __expo2f(x, 1.0f);
-	return t;
-}
diff --git a/lib/libc/wasi/libc-top-half/musl/src/math/coshf.c b/lib/libc/wasi/libc-top-half/musl/src/math/coshf.c
deleted file mode 100644
index b946c0b068e6292ac99a53d855fb8b3a6f91bef3..0000000000000000000000000000000000000000
--- a/lib/libc/wasi/libc-top-half/musl/src/math/coshf.c
+++ /dev/null
@@ -1,37 +0,0 @@
-#include "libm.h"
-
-float coshf(float x)
-{
-	union {float f; uint32_t i;} u = {.f = x};
-	uint32_t w;
-	float t;
-
-	/* |x| */
-	u.i &= 0x7fffffff;
-	x = u.f;
-	w = u.i;
-
-	/* |x| < log(2) */
-	if (w < 0x3f317217) {
-		if (w < 0x3f800000 - (12<<23)) {
-			FORCE_EVAL(x + 0x1p120f);
-			return 1;
-		}
-		t = expm1f(x);
-		return 1 + t*t/(2*(1+t));
-	}
-
-	/* |x| < log(FLT_MAX) */
-	if (w < 0x42b17217) {
-		t = expf(x);
-		return 0.5f*(t + 1/t);
-	}
-
-	/* |x| > log(FLT_MAX) or nan */
-#ifdef __wasilibc_unmodified_upstream // Wasm doesn't have alternate rounding modes
-	t = __expo2f(x, 1.0f);
-#else
-	t = __expo2f(x);
-#endif
-	return t;
-}
diff --git a/src/libs/mingw.zig b/src/libs/mingw.zig
index 0be2b7c0a8c4a13faaac25ad2b3d654d8bd23d1e..70e0d6e8c019e760144004437e10f2e42c0123f5 100644
--- a/src/libs/mingw.zig
+++ b/src/libs/mingw.zig
@@ -977,7 +977,6 @@ const mingw32_x86_src = [_][]const u8{
 
 const mingw32_x86_32_src = [_][]const u8{
     // ucrtbase
-    "math" ++ path.sep_str ++ "coshf.c",
     "math" ++ path.sep_str ++ "modff.c",
     "math" ++ path.sep_str ++ "powf.c",
     "math" ++ path.sep_str ++ "sinhf.c",
diff --git a/src/libs/musl.zig b/src/libs/musl.zig
index eb49d4c4f136f9b166f4dc81593d7d2ecc9b8daf..482c1a1b29190bac0e48368ab61d77ec196ce157 100644
--- a/src/libs/musl.zig
+++ b/src/libs/musl.zig
@@ -819,7 +819,6 @@ const src_files = [_][]const u8{
     "musl/src/math/cbrtl.c",
     "musl/src/math/__cos.c",
     "musl/src/math/__cosdf.c",
-    "musl/src/math/coshf.c",
     "musl/src/math/coshl.c",
     "musl/src/math/__cosl.c",
     "musl/src/math/cosl.c",
diff --git a/src/libs/wasi_libc.zig b/src/libs/wasi_libc.zig
index 72b19fe2e6e88e9cb8ead76bd4178248ef1c633c..67c1b0e74c2a54bea0e7948fff34205201f3ce7d 100644
--- a/src/libs/wasi_libc.zig
+++ b/src/libs/wasi_libc.zig
@@ -1003,7 +1003,6 @@ const libc_top_half_src_files = [_][]const u8{
     "wasi/libc-top-half/musl/src/locale/locale_map.c",
     "wasi/libc-top-half/musl/src/locale/newlocale.c",
     "wasi/libc-top-half/musl/src/locale/uselocale.c",
-    "wasi/libc-top-half/musl/src/math/coshf.c",
     "wasi/libc-top-half/musl/src/math/__expo2.c",
     "wasi/libc-top-half/musl/src/math/__expo2f.c",
     "wasi/libc-top-half/musl/src/math/fmal.c",
-- 
2.54.0