| author |  mihael <hi@mihaelm.com> 2026-03-15 23:28:13+01:00 |
| committer | mihael <hi@mihaelm.com> 2026-03-17 23:33:10+01:00 |
| log | 691416c24d3c99574f1b168931f8fcd6227760b8 |
| tree | 211322c8f2c7ce3e73ad5b6d2a2166a5306495ff |
| parent | fd680ba5fbe99dde71b6ec28ecae1cddf4fed71b |
| signature |  Signed by SSH key SHA256:aoFoShdYLdrqMichqKXSSieTKUfACUIDJHsKc4V2tQg |
`libzigc`: Implement `tanhf`
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=tanhf -fqemu -fwasmtime --summary line
Build Summary: 553/553 steps succeeded
```6 files changed, 5 insertions(+), 52 deletions(-)
lib/c/math.zig+5
| ... | @@ -43,6 +43,7 @@ comptime { | ... | @@ -43,6 +43,7 @@ comptime { |
| 43 | symbol(&nan, "nan"); | 43 | symbol(&nan, "nan"); |
| 44 | symbol(&nanf, "nanf"); | 44 | symbol(&nanf, "nanf"); |
| 45 | symbol(&nanl, "nanl"); | 45 | symbol(&nanl, "nanl"); |
| 46 | symbol(&tanhf, "tanhf"); | ||
| 46 | } | 47 | } |
| 47 | 48 | ||
| 48 | if (builtin.target.isMuslLibC() or builtin.target.isWasiLibC()) { | 49 | if (builtin.target.isMuslLibC() or builtin.target.isWasiLibC()) { |
| ... | @@ -343,3 +344,7 @@ test "rint" { | ... | @@ -343,3 +344,7 @@ test "rint" { |
| 343 | fn tanh(x: f64) callconv(.c) f64 { | 344 | fn tanh(x: f64) callconv(.c) f64 { |
| 344 | return math.tanh(x); | 345 | return math.tanh(x); |
| 345 | } | 346 | } |
| 347 | |||
| 348 | fn tanhf(x: f32) callconv(.c) f32 { | ||
| 349 | return math.tanh(x); | ||
| 350 | } |
lib/libc/mingw/math/tanhf.c deleted-10
| ... | @@ -1,10 +0,0 @@ | ||
| 1 | /** | ||
| 2 | * This file has no copyright assigned and is placed in the Public Domain. | ||
| 3 | * This file is part of the mingw-w64 runtime package. | ||
| 4 | * No warranty is given; refer to the file DISCLAIMER.PD within this package. | ||
| 5 | */ | ||
| 6 | #include <math.h> | ||
| 7 | float tanhf (float x) | ||
| 8 | { | ||
| 9 | return (float) tanh (x); | ||
| 10 | } | ||
lib/libc/musl/src/math/tanhf.c deleted-39
| ... | @@ -1,39 +0,0 @@ | ||
| 1 | #include "libm.h" | ||
| 2 | |||
| 3 | float tanhf(float x) | ||
| 4 | { | ||
| 5 | union {float f; uint32_t i;} u = {.f = x}; | ||
| 6 | uint32_t w; | ||
| 7 | int sign; | ||
| 8 | float t; | ||
| 9 | |||
| 10 | /* x = |x| */ | ||
| 11 | sign = u.i >> 31; | ||
| 12 | u.i &= 0x7fffffff; | ||
| 13 | x = u.f; | ||
| 14 | w = u.i; | ||
| 15 | |||
| 16 | if (w > 0x3f0c9f54) { | ||
| 17 | /* |x| > log(3)/2 ~= 0.5493 or nan */ | ||
| 18 | if (w > 0x41200000) { | ||
| 19 | /* |x| > 10 */ | ||
| 20 | t = 1 + 0/x; | ||
| 21 | } else { | ||
| 22 | t = expm1f(2*x); | ||
| 23 | t = 1 - 2/(t+2); | ||
| 24 | } | ||
| 25 | } else if (w > 0x3e82c578) { | ||
| 26 | /* |x| > log(5/3)/2 ~= 0.2554 */ | ||
| 27 | t = expm1f(2*x); | ||
| 28 | t = t/(t+2); | ||
| 29 | } else if (w >= 0x00800000) { | ||
| 30 | /* |x| >= 0x1p-126 */ | ||
| 31 | t = expm1f(-2*x); | ||
| 32 | t = -t/(t+2); | ||
| 33 | } else { | ||
| 34 | /* |x| is subnormal */ | ||
| 35 | FORCE_EVAL(x*x); | ||
| 36 | t = x; | ||
| 37 | } | ||
| 38 | return sign ? -t : t; | ||
| 39 | } | ||
src/libs/mingw.zig-1
| ... | @@ -978,7 +978,6 @@ const mingw32_x86_32_src = [_][]const u8{ | ... | @@ -978,7 +978,6 @@ const mingw32_x86_32_src = [_][]const u8{ |
| 978 | // ucrtbase | 978 | // ucrtbase |
| 979 | "math" ++ path.sep_str ++ "powf.c", | 979 | "math" ++ path.sep_str ++ "powf.c", |
| 980 | "math" ++ path.sep_str ++ "sinhf.c", | 980 | "math" ++ path.sep_str ++ "sinhf.c", |
| 981 | "math" ++ path.sep_str ++ "tanhf.c", | ||
| 982 | "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "acosf.c", | 981 | "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "acosf.c", |
| 983 | "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "asinf.c", | 982 | "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "asinf.c", |
| 984 | "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "atan2f.c", | 983 | "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "atan2f.c", |
src/libs/musl.zig-1
| ... | @@ -1003,7 +1003,6 @@ const src_files = [_][]const u8{ | ... | @@ -1003,7 +1003,6 @@ const src_files = [_][]const u8{ |
| 1003 | "musl/src/math/sinl.c", | 1003 | "musl/src/math/sinl.c", |
| 1004 | "musl/src/math/__tan.c", | 1004 | "musl/src/math/__tan.c", |
| 1005 | "musl/src/math/__tandf.c", | 1005 | "musl/src/math/__tandf.c", |
| 1006 | "musl/src/math/tanhf.c", | ||
| 1007 | "musl/src/math/tanhl.c", | 1006 | "musl/src/math/tanhl.c", |
| 1008 | "musl/src/math/__tanl.c", | 1007 | "musl/src/math/__tanl.c", |
| 1009 | "musl/src/math/tanl.c", | 1008 | "musl/src/math/tanl.c", |
src/libs/wasi_libc.zig-1
| ... | @@ -793,7 +793,6 @@ const libc_top_half_src_files = [_][]const u8{ | ... | @@ -793,7 +793,6 @@ const libc_top_half_src_files = [_][]const u8{ |
| 793 | "musl/src/math/sinl.c", | 793 | "musl/src/math/sinl.c", |
| 794 | "musl/src/math/__tan.c", | 794 | "musl/src/math/__tan.c", |
| 795 | "musl/src/math/__tandf.c", | 795 | "musl/src/math/__tandf.c", |
| 796 | "musl/src/math/tanhf.c", | ||
| 797 | "musl/src/math/tanhl.c", | 796 | "musl/src/math/tanhl.c", |
| 798 | "musl/src/math/__tanl.c", | 797 | "musl/src/math/__tanl.c", |
| 799 | "musl/src/math/tanl.c", | 798 | "musl/src/math/tanl.c", |