Commit 19334f95c1797af2ead725baf3a67070d90c8586 | zig

author	mihael <hi@mihaelm.com> 2026-03-20 22:16:01+01:00
committer	mihael <hi@mihaelm.com> 2026-04-02 23:54:20+02:00
log	19334f95c1797af2ead725baf3a67070d90c8586
tree	bdfb9791b5ce90f702025db2f8593de8f78eae01
parent	bd1dc8948f6093a13f1ac887b71fb71466b24f9e
signature	Signed by SSH key SHA256:aoFoShdYLdrqMichqKXSSieTKUfACUIDJHsKc4V2tQg

`libzigc/math`: Implement `lrintf`

This was checked 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=lrintf -fqemu -fwasmtime --summary line
Build Summary: 369/369 steps succeeded
```

9 files changed, 5 insertions(+), 62 deletions(-)

lib
- c
  - math.zig
- libc
  - musl
    src
    math
    aarch64
    lrintf.c
    i386
    lrintf.c
    lrintf.c
    powerpc64
    lrintf.c
    x32
    lrintf.s
    x86_64
    lrintf.c
src
- libs
  - musl.zig
  - wasi_libc.zig

lib/c/math.zig+5

...	...	@@ -72,6 +72,7 @@ comptime {
72	72	symbol(&frexp, "frexp");
73	73	symbol(&hypot, "hypot");
74	74	symbol(&lrint, "lrint");
	75	symbol(&lrintf, "lrintf");
75	76	symbol(&modf, "modf");
76	77	symbol(&pow, "pow");
77	78	symbol(&pow10, "pow10");
...	...	@@ -238,6 +239,10 @@ fn lrint(x: f64) callconv(.c) c_long {
238	239	return @intFromFloat(rint(x));
239	240	}
240	241
	242	fn lrintf(x: f32) callconv(.c) c_long {
	243	return @intFromFloat(rintf(x));
	244	}
	245
241	246	fn modfGeneric(comptime T: type, x: T, iptr: *T) T {
242	247	if (math.isNegativeInf(x)) {
243	248	iptr.* = -math.inf(T);

lib/libc/musl/src/math/aarch64/lrintf.c deleted-10

...	...	@@ -1,10 +0,0 @@
1		#include <math.h>
2
3		long lrintf(float x)
4		{
5		long n;
6		__asm__ (
7		"frintx %s1, %s1\n"
8		"fcvtzs %x0, %s1\n" : "=r"(n), "+w"(x));
9		return n;
10		}

lib/libc/musl/src/math/i386/lrintf.c deleted-8

...	...	@@ -1,8 +0,0 @@
1		#include <math.h>
2
3		long lrintf(float x)
4		{
5		long r;
6		__asm__ ("fistpl %0" : "=m"(r) : "t"(x) : "st");
7		return r;
8		}

lib/libc/musl/src/math/lrintf.c deleted-8

...	...	@@ -1,8 +0,0 @@
1		#include <math.h>
2
3		/* uses LONG_MAX > 2^24, see comments in lrint.c */
4
5		long lrintf(float x)
6		{
7		return rintf(x);
8		}

lib/libc/musl/src/math/powerpc64/lrintf.c deleted-16

...	...	@@ -1,16 +0,0 @@
1		#include <math.h>
2
3		#ifdef _ARCH_PWR5X
4
5		long lrintf(float x)
6		{
7		long n;
8		__asm__ ("fctid %0, %1" : "=d"(n) : "f"(x));
9		return n;
10		}
11
12		#else
13
14		#include "../lrintf.c"
15
16		#endif

lib/libc/musl/src/math/x32/lrintf.s deleted-5

...	...	@@ -1,5 +0,0 @@
1		.global lrintf
2		.type lrintf,@function
3		lrintf:
4		cvtss2si %xmm0,%rax
5		ret

lib/libc/musl/src/math/x86_64/lrintf.c deleted-8

...	...	@@ -1,8 +0,0 @@
1		#include <math.h>
2
3		long lrintf(float x)
4		{
5		long r;
6		__asm__ ("cvtss2si %1, %0" : "=r"(r) : "x"(x));
7		return r;
8		}

src/libs/musl.zig-6

...	...	@@ -787,7 +787,6 @@ const src_files = [_][]const u8{
787	787	"musl/src/math/aarch64/llrintf.c",
788	788	"musl/src/math/aarch64/llround.c",
789	789	"musl/src/math/aarch64/llroundf.c",
790		"musl/src/math/aarch64/lrintf.c",
791	790	"musl/src/math/aarch64/lround.c",
792	791	"musl/src/math/aarch64/lroundf.c",
793	792	"musl/src/math/aarch64/nearbyint.c",
...	...	@@ -858,7 +857,6 @@ const src_files = [_][]const u8{
858	857	"musl/src/math/i386/log1p.s",
859	858	"musl/src/math/i386/log2l.s",
860	859	"musl/src/math/i386/logl.s",
861		"musl/src/math/i386/lrintf.c",
862	860	"musl/src/math/i386/lrintl.c",
863	861	"musl/src/math/i386/remainder.c",
864	862	"musl/src/math/i386/remainderf.c",
...	...	@@ -906,7 +904,6 @@ const src_files = [_][]const u8{
906	904	"musl/src/math/logbf.c",
907	905	"musl/src/math/logbl.c",
908	906	"musl/src/math/logl.c",
909		"musl/src/math/lrintf.c",
910	907	"musl/src/math/lrintl.c",
911	908	"musl/src/math/lround.c",
912	909	"musl/src/math/lroundf.c",
...	...	@@ -935,7 +932,6 @@ const src_files = [_][]const u8{
935	932	"musl/src/math/pow_data.c",
936	933	"musl/src/math/powerpc64/fma.c",
937	934	"musl/src/math/powerpc64/fmaf.c",
938		"musl/src/math/powerpc64/lrintf.c",
939	935	"musl/src/math/powerpc64/lround.c",
940	936	"musl/src/math/powerpc64/lroundf.c",
941	937	"musl/src/math/powerpc/fma.c",
...	...	@@ -1007,7 +1003,6 @@ const src_files = [_][]const u8{
1007	1003	"musl/src/math/x32/log1pl.s",
1008	1004	"musl/src/math/x32/log2l.s",
1009	1005	"musl/src/math/x32/logl.s",
1010		"musl/src/math/x32/lrintf.s",
1011	1006	"musl/src/math/x32/lrintl.s",
1012	1007	"musl/src/math/x32/remainderl.s",
1013	1008	"musl/src/math/x32/rintl.s",
...	...	@@ -1027,7 +1022,6 @@ const src_files = [_][]const u8{
1027	1022	"musl/src/math/x86_64/log1pl.s",
1028	1023	"musl/src/math/x86_64/log2l.s",
1029	1024	"musl/src/math/x86_64/logl.s",
1030		"musl/src/math/x86_64/lrintf.c",
1031	1025	"musl/src/math/x86_64/lrintl.c",
1032	1026	"musl/src/math/x86_64/remainderl.c",
1033	1027	"musl/src/math/x86_64/remquol.c",

src/libs/wasi_libc.zig-1

...	...	@@ -732,7 +732,6 @@ const libc_top_half_src_files = [_][]const u8{
732	732	"musl/src/math/logbf.c",
733	733	"musl/src/math/logbl.c",
734	734	"musl/src/math/logl.c",
735		"musl/src/math/lrintf.c",
736	735	"musl/src/math/lrintl.c",
737	736	"musl/src/math/lround.c",
738	737	"musl/src/math/lroundf.c",