Add rintf16 and rintf128

Use the generic algorithms to provide implementations for these
routines.

Author: tgross35

crates/compiler-builtins-smoke-test/src/lib.rs

@@ -145,6 +145,8 @@ no_mangle! {
     remquof(x: f32, y: f32 | q: &mut c_int) -> f32;
     rint(x: f64) -> f64;
     rintf(x: f32) -> f32;
+    rintf128(x: f128) -> f128;
+    rintf16(x: f16) -> f16;
     round(x: f64) -> f64;
     roundf(x: f32) -> f32;
     scalbn(x: f64, y: c_int) -> f64;

crates/libm-macros/src/shared.rs

@@ -9,7 +9,7 @@ const ALL_OPERATIONS_NESTED: &[(FloatTy, Signature, Option<Signature>, &[&str])]
         FloatTy::F16,
         Signature { args: &[Ty::F16], returns: &[Ty::F16] },
         None,
-        &["ceilf16", "fabsf16", "floorf16", "sqrtf16", "truncf16"],
+        &["ceilf16", "fabsf16", "floorf16", "rintf16", "sqrtf16", "truncf16"],
     ),
     (
         // `fn(f32) -> f32`
@@ -40,7 +40,7 @@ const ALL_OPERATIONS_NESTED: &[(FloatTy, Signature, Option<Signature>, &[&str])]
         FloatTy::F128,
         Signature { args: &[Ty::F128], returns: &[Ty::F128] },
         None,
-        &["ceilf128", "fabsf128", "floorf128", "sqrtf128", "truncf128"],
+        &["ceilf128", "fabsf128", "floorf128", "rintf128", "sqrtf128", "truncf128"],
     ),
     (
         // `(f16, f16) -> f16`

crates/libm-test/benches/icount.rs

@@ -149,6 +149,8 @@ main!(
     icount_bench_remquo_group,
     icount_bench_remquof_group,
     icount_bench_rint_group,
+    icount_bench_rintf128_group,
+    icount_bench_rintf16_group,
     icount_bench_rintf_group,
     icount_bench_round_group,
     icount_bench_roundf_group,

crates/libm-test/benches/random.rs

@@ -127,6 +127,8 @@ libm_macros::for_each_function! {
         | fdimf16
         | floorf128
         | floorf16
+        | rintf128
+        | rintf16
         | sqrtf128
         | sqrtf16
         | truncf128

crates/libm-test/src/mpfloat.rs

@@ -170,6 +170,8 @@ libm_macros::for_each_function! {
         remquof,
         rint,
         rintf,
+        rintf128,
+        rintf16,
         round,
         roundf,
         scalbn,
@@ -240,17 +242,19 @@ impl_no_round! {
 
 #[cfg(f16_enabled)]
 impl_no_round! {
-    fabsf16 => abs_mut;
     ceilf16 => ceil_mut;
+    fabsf16 => abs_mut;
     floorf16 => floor_mut;
+    rintf16 => round_even_mut; // FIXME: respect rounding mode
     truncf16 => trunc_mut;
 }
 
 #[cfg(f128_enabled)]
 impl_no_round! {
-    fabsf128 => abs_mut;
     ceilf128 => ceil_mut;
+    fabsf128 => abs_mut;
     floorf128 => floor_mut;
+    rintf128 => round_even_mut; // FIXME: respect rounding mode
     truncf128 => trunc_mut;
 }
 

crates/libm-test/tests/compare_built_musl.rs

@@ -89,9 +89,11 @@ libm_macros::for_each_function! {
         fdimf16,
         floorf128,
         floorf16,
+        rintf128,
+        rintf16,
+        sqrtf128,
+        sqrtf16,
         truncf128,
         truncf16,
-        sqrtf16,
-        sqrtf128,
     ],
 }

crates/util/src/main.rs

@@ -94,6 +94,8 @@ fn do_eval(basis: &str, op: &str, inputs: &[&str]) {
             | fdimf16
             | floorf128
             | floorf16
+            | rintf128
+            | rintf16
             | sqrtf128
             | sqrtf16
             | truncf128

etc/function-definitions.json

@@ -668,6 +668,20 @@
         ],
         "type": "f32"
     },
+    "rintf128": {
+        "sources": [
+            "src/math/generic/rint.rs",
+            "src/math/rintf128.rs"
+        ],
+        "type": "f128"
+    },
+    "rintf16": {
+        "sources": [
+            "src/math/generic/rint.rs",
+            "src/math/rintf16.rs"
+        ],
+        "type": "f16"
+    },
     "round": {
         "sources": [
             "src/libm_helper.rs",

etc/function-list.txt

@@ -97,6 +97,8 @@ remquo
 remquof
 rint
 rintf
+rintf128
+rintf16
 round
 roundf
 scalbn

src/math/mod.rs

@@ -346,6 +346,7 @@ cfg_if! {
         mod fabsf16;
         mod fdimf16;
         mod floorf16;
+        mod rintf16;
         mod sqrtf16;
         mod truncf16;
 
@@ -354,6 +355,7 @@ cfg_if! {
         pub use self::fabsf16::fabsf16;
         pub use self::fdimf16::fdimf16;
         pub use self::floorf16::floorf16;
+        pub use self::rintf16::rintf16;
         pub use self::sqrtf16::sqrtf16;
         pub use self::truncf16::truncf16;
     }
@@ -366,6 +368,7 @@ cfg_if! {
         mod fabsf128;
         mod fdimf128;
         mod floorf128;
+        mod rintf128;
         mod sqrtf128;
         mod truncf128;
 
@@ -374,6 +377,7 @@ cfg_if! {
         pub use self::fabsf128::fabsf128;
         pub use self::fdimf128::fdimf128;
         pub use self::floorf128::floorf128;
+        pub use self::rintf128::rintf128;
         pub use self::sqrtf128::sqrtf128;
         pub use self::truncf128::truncf128;
     }