Auto merge of #114156 - calebzulawski:simd-bswap, r=compiler-errors

Add simd_bswap, simd_bitreverse, simd_ctlz, and simd_cttz intrinsics

cc `@workingjubilee`

6 files changed, 173 insertions, 25 deletions

diff --git a/compiler/rustc_codegen_llvm/src/intrinsic.rs b/compiler/rustc_codegen_llvm/src/intrinsic.rs
index 6df1b708ccd..623c08ce86b 100644
--- a/compiler/rustc_codegen_llvm/src/intrinsic.rs
+++ b/compiler/rustc_codegen_llvm/src/intrinsic.rs
@@ -2074,6 +2074,53 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         simd_neg: Int => neg, Float => fneg;
     }
 
+    // Unary integer intrinsics
+    if matches!(name, sym::simd_bswap | sym::simd_bitreverse | sym::simd_ctlz | sym::simd_cttz) {
+        let vec_ty = bx.cx.type_vector(
+            match *in_elem.kind() {
+                ty::Int(i) => bx.cx.type_int_from_ty(i),
+                ty::Uint(i) => bx.cx.type_uint_from_ty(i),
+                _ => return_error!(InvalidMonomorphization::UnsupportedOperation {
+                    span,
+                    name,
+                    in_ty,
+                    in_elem
+                }),
+            },
+            in_len as u64,
+        );
+        let intrinsic_name = match name {
+            sym::simd_bswap => "bswap",
+            sym::simd_bitreverse => "bitreverse",
+            sym::simd_ctlz => "ctlz",
+            sym::simd_cttz => "cttz",
+            _ => unreachable!(),
+        };
+        let llvm_intrinsic = &format!(
+            "llvm.{}.v{}i{}",
+            intrinsic_name,
+            in_len,
+            in_elem.int_size_and_signed(bx.tcx()).0.bits(),
+        );
+
+        return Ok(if matches!(name, sym::simd_ctlz | sym::simd_cttz) {
+            let fn_ty = bx.type_func(&[vec_ty, bx.type_i1()], vec_ty);
+            let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty);
+            bx.call(
+                fn_ty,
+                None,
+                None,
+                f,
+                &[args[0].immediate(), bx.const_int(bx.type_i1(), 0)],
+                None,
+            )
+        } else {
+            let fn_ty = bx.type_func(&[vec_ty], vec_ty);
+            let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty);
+            bx.call(fn_ty, None, None, f, &[args[0].immediate()], None)
+        });
+    }
+
     if name == sym::simd_arith_offset {
         // This also checks that the first operand is a ptr type.
         let pointee = in_elem.builtin_deref(true).unwrap_or_else(|| {
diff --git a/compiler/rustc_hir_analysis/src/check/intrinsic.rs b/compiler/rustc_hir_analysis/src/check/intrinsic.rs
index e076b1fc68c..064021b1ea4 100644
--- a/compiler/rustc_hir_analysis/src/check/intrinsic.rs
+++ b/compiler/rustc_hir_analysis/src/check/intrinsic.rs
@@ -521,6 +521,10 @@ pub fn check_platform_intrinsic_type(tcx: TyCtxt<'_>, it: &hir::ForeignItem<'_>)
         | sym::simd_saturating_sub => (1, vec![param(0), param(0)], param(0)),
         sym::simd_arith_offset => (2, vec![param(0), param(1)], param(0)),
         sym::simd_neg
+        | sym::simd_bswap
+        | sym::simd_bitreverse
+        | sym::simd_ctlz
+        | sym::simd_cttz
         | sym::simd_fsqrt
         | sym::simd_fsin
         | sym::simd_fcos
diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
index 8122fe96a5c..d3739733c1d 100644
--- a/compiler/rustc_span/src/symbol.rs
+++ b/compiler/rustc_span/src/symbol.rs
@@ -1371,9 +1371,13 @@ symbols! {
         simd_arith_offset,
         simd_as,
         simd_bitmask,
+        simd_bitreverse,
+        simd_bswap,
         simd_cast,
         simd_cast_ptr,
         simd_ceil,
+        simd_ctlz,
+        simd_cttz,
         simd_div,
         simd_eq,
         simd_expose_addr,
diff --git a/tests/ui/simd/intrinsic/generic-arithmetic-2.rs b/tests/ui/simd/intrinsic/generic-arithmetic-2.rs
index 3576eed71ab..62fb5238bbd 100644
--- a/tests/ui/simd/intrinsic/generic-arithmetic-2.rs
+++ b/tests/ui/simd/intrinsic/generic-arithmetic-2.rs
@@ -27,6 +27,10 @@ extern "platform-intrinsic" {
     fn simd_xor<T>(x: T, y: T) -> T;
 
     fn simd_neg<T>(x: T) -> T;
+    fn simd_bswap<T>(x: T) -> T;
+    fn simd_bitreverse<T>(x: T) -> T;
+    fn simd_ctlz<T>(x: T) -> T;
+    fn simd_cttz<T>(x: T) -> T;
 }
 
 fn main() {
@@ -64,6 +68,14 @@ fn main() {
 
         simd_neg(x);
         simd_neg(z);
+        simd_bswap(x);
+        simd_bswap(y);
+        simd_bitreverse(x);
+        simd_bitreverse(y);
+        simd_ctlz(x);
+        simd_ctlz(y);
+        simd_cttz(x);
+        simd_cttz(y);
 
 
         simd_add(0, 0);
@@ -87,6 +99,14 @@ fn main() {
 
         simd_neg(0);
         //~^ ERROR expected SIMD input type, found non-SIMD `i32`
+        simd_bswap(0);
+        //~^ ERROR expected SIMD input type, found non-SIMD `i32`
+        simd_bitreverse(0);
+        //~^ ERROR expected SIMD input type, found non-SIMD `i32`
+        simd_ctlz(0);
+        //~^ ERROR expected SIMD input type, found non-SIMD `i32`
+        simd_cttz(0);
+        //~^ ERROR expected SIMD input type, found non-SIMD `i32`
 
 
         simd_shl(z, z);
@@ -99,5 +119,13 @@ fn main() {
 //~^ ERROR unsupported operation on `f32x4` with element `f32`
         simd_xor(z, z);
 //~^ ERROR unsupported operation on `f32x4` with element `f32`
+        simd_bswap(z);
+//~^ ERROR unsupported operation on `f32x4` with element `f32`
+        simd_bitreverse(z);
+//~^ ERROR unsupported operation on `f32x4` with element `f32`
+        simd_ctlz(z);
+//~^ ERROR unsupported operation on `f32x4` with element `f32`
+        simd_cttz(z);
+//~^ ERROR unsupported operation on `f32x4` with element `f32`
     }
 }
diff --git a/tests/ui/simd/intrinsic/generic-arithmetic-2.stderr b/tests/ui/simd/intrinsic/generic-arithmetic-2.stderr
index 0f0a7ea6652..db26f3417c9 100644
--- a/tests/ui/simd/intrinsic/generic-arithmetic-2.stderr
+++ b/tests/ui/simd/intrinsic/generic-arithmetic-2.stderr
@@ -1,93 +1,141 @@
 error[E0511]: invalid monomorphization of `simd_add` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:69:9
+  --> $DIR/generic-arithmetic-2.rs:81:9
    |
 LL |         simd_add(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_sub` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:71:9
+  --> $DIR/generic-arithmetic-2.rs:83:9
    |
 LL |         simd_sub(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_mul` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:73:9
+  --> $DIR/generic-arithmetic-2.rs:85:9
    |
 LL |         simd_mul(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_div` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:75:9
+  --> $DIR/generic-arithmetic-2.rs:87:9
    |
 LL |         simd_div(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shl` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:77:9
+  --> $DIR/generic-arithmetic-2.rs:89:9
    |
 LL |         simd_shl(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shr` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:79:9
+  --> $DIR/generic-arithmetic-2.rs:91:9
    |
 LL |         simd_shr(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_and` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:81:9
+  --> $DIR/generic-arithmetic-2.rs:93:9
    |
 LL |         simd_and(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_or` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:83:9
+  --> $DIR/generic-arithmetic-2.rs:95:9
    |
 LL |         simd_or(0, 0);
    |         ^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_xor` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:85:9
+  --> $DIR/generic-arithmetic-2.rs:97:9
    |
 LL |         simd_xor(0, 0);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_neg` intrinsic: expected SIMD input type, found non-SIMD `i32`
-  --> $DIR/generic-arithmetic-2.rs:88:9
+  --> $DIR/generic-arithmetic-2.rs:100:9
    |
 LL |         simd_neg(0);
    |         ^^^^^^^^^^^
 
+error[E0511]: invalid monomorphization of `simd_bswap` intrinsic: expected SIMD input type, found non-SIMD `i32`
+  --> $DIR/generic-arithmetic-2.rs:102:9
+   |
+LL |         simd_bswap(0);
+   |         ^^^^^^^^^^^^^
+
+error[E0511]: invalid monomorphization of `simd_bitreverse` intrinsic: expected SIMD input type, found non-SIMD `i32`
+  --> $DIR/generic-arithmetic-2.rs:104:9
+   |
+LL |         simd_bitreverse(0);
+   |         ^^^^^^^^^^^^^^^^^^
+
+error[E0511]: invalid monomorphization of `simd_ctlz` intrinsic: expected SIMD input type, found non-SIMD `i32`
+  --> $DIR/generic-arithmetic-2.rs:106:9
+   |
+LL |         simd_ctlz(0);
+   |         ^^^^^^^^^^^^
+
+error[E0511]: invalid monomorphization of `simd_cttz` intrinsic: expected SIMD input type, found non-SIMD `i32`
+  --> $DIR/generic-arithmetic-2.rs:108:9
+   |
+LL |         simd_cttz(0);
+   |         ^^^^^^^^^^^^
+
 error[E0511]: invalid monomorphization of `simd_shl` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:92:9
+  --> $DIR/generic-arithmetic-2.rs:112:9
    |
 LL |         simd_shl(z, z);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_shr` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:94:9
+  --> $DIR/generic-arithmetic-2.rs:114:9
    |
 LL |         simd_shr(z, z);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_and` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:96:9
+  --> $DIR/generic-arithmetic-2.rs:116:9
    |
 LL |         simd_and(z, z);
    |         ^^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_or` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:98:9
+  --> $DIR/generic-arithmetic-2.rs:118:9
    |
 LL |         simd_or(z, z);
    |         ^^^^^^^^^^^^^
 
 error[E0511]: invalid monomorphization of `simd_xor` intrinsic: unsupported operation on `f32x4` with element `f32`
-  --> $DIR/generic-arithmetic-2.rs:100:9
+  --> $DIR/generic-arithmetic-2.rs:120:9
    |
 LL |         simd_xor(z, z);
    |         ^^^^^^^^^^^^^^
 
-error: aborting due to 15 previous errors
+error[E0511]: invalid monomorphization of `simd_bswap` intrinsic: unsupported operation on `f32x4` with element `f32`
+  --> $DIR/generic-arithmetic-2.rs:122:9
+   |
+LL |         simd_bswap(z);
+   |         ^^^^^^^^^^^^^
+
+error[E0511]: invalid monomorphization of `simd_bitreverse` intrinsic: unsupported operation on `f32x4` with element `f32`
+  --> $DIR/generic-arithmetic-2.rs:124:9
+   |
+LL |         simd_bitreverse(z);
+   |         ^^^^^^^^^^^^^^^^^^
+
+error[E0511]: invalid monomorphization of `simd_ctlz` intrinsic: unsupported operation on `f32x4` with element `f32`
+  --> $DIR/generic-arithmetic-2.rs:126:9
+   |
+LL |         simd_ctlz(z);
+   |         ^^^^^^^^^^^^
+
+error[E0511]: invalid monomorphization of `simd_cttz` intrinsic: unsupported operation on `f32x4` with element `f32`
+  --> $DIR/generic-arithmetic-2.rs:128:9
+   |
+LL |         simd_cttz(z);
+   |         ^^^^^^^^^^^^
+
+error: aborting due to 23 previous errors
 
 For more information about this error, try `rustc --explain E0511`.
diff --git a/tests/ui/simd/intrinsic/generic-arithmetic-pass.rs b/tests/ui/simd/intrinsic/generic-arithmetic-pass.rs
index c507b8d31ec..f021ee4710a 100644
--- a/tests/ui/simd/intrinsic/generic-arithmetic-pass.rs
+++ b/tests/ui/simd/intrinsic/generic-arithmetic-pass.rs
@@ -1,8 +1,6 @@
 // run-pass
 #![allow(non_camel_case_types)]
-
 // ignore-emscripten FIXME(#45351) hits an LLVM assert
-
 #![feature(repr_simd, platform_intrinsics)]
 
 #[repr(simd)]
@@ -22,7 +20,7 @@ macro_rules! all_eq {
         let a = $a;
         let b = $b;
         assert!(a.0 == b.0 && a.1 == b.1 && a.2 == b.2 && a.3 == b.3);
-    }}
+    }};
 }
 
 macro_rules! all_eq_ {
@@ -30,10 +28,9 @@ macro_rules! all_eq_ {
         let a = $a;
         let b = $b;
         assert!(a.0 == b.0);
-    }}
+    }};
 }
 
-
 extern "platform-intrinsic" {
     fn simd_add<T>(x: T, y: T) -> T;
     fn simd_sub<T>(x: T, y: T) -> T;
@@ -47,6 +44,10 @@ extern "platform-intrinsic" {
     fn simd_xor<T>(x: T, y: T) -> T;
 
     fn simd_neg<T>(x: T) -> T;
+    fn simd_bswap<T>(x: T) -> T;
+    fn simd_bitreverse<T>(x: T) -> T;
+    fn simd_ctlz<T>(x: T) -> T;
+    fn simd_cttz<T>(x: T) -> T;
 }
 
 fn main() {
@@ -84,8 +85,8 @@ fn main() {
         all_eq_!(simd_div(y1, y1), U32::<4>([1, 1, 1, 1]));
         all_eq_!(simd_div(U32::<4>([2, 4, 6, 8]), U32::<4>([2, 2, 2, 2])), y1);
         all_eq!(simd_div(z1, z1), f32x4(1.0, 1.0, 1.0, 1.0));
-        all_eq!(simd_div(z1, z2), f32x4(1.0/2.0, 2.0/3.0, 3.0/4.0, 4.0/5.0));
-        all_eq!(simd_div(z2, z1), f32x4(2.0/1.0, 3.0/2.0, 4.0/3.0, 5.0/4.0));
+        all_eq!(simd_div(z1, z2), f32x4(1.0 / 2.0, 2.0 / 3.0, 3.0 / 4.0, 4.0 / 5.0));
+        all_eq!(simd_div(z2, z1), f32x4(2.0 / 1.0, 3.0 / 2.0, 4.0 / 3.0, 5.0 / 4.0));
 
         all_eq!(simd_rem(x1, x1), i32x4(0, 0, 0, 0));
         all_eq!(simd_rem(x2, x1), i32x4(0, 1, 1, 1));
@@ -109,8 +110,10 @@ fn main() {
         // ensure we get logical vs. arithmetic shifts correct
         let (a, b, c, d) = (-12, -123, -1234, -12345);
         all_eq!(simd_shr(i32x4(a, b, c, d), x1), i32x4(a >> 1, b >> 2, c >> 3, d >> 4));
-        all_eq_!(simd_shr(U32::<4>([a as u32, b as u32, c as u32, d as u32]), y1),
-                U32::<4>([(a as u32) >> 1, (b as u32) >> 2, (c as u32) >> 3, (d as u32) >> 4]));
+        all_eq_!(
+            simd_shr(U32::<4>([a as u32, b as u32, c as u32, d as u32]), y1),
+            U32::<4>([(a as u32) >> 1, (b as u32) >> 2, (c as u32) >> 3, (d as u32) >> 4])
+        );
 
         all_eq!(simd_and(x1, x2), i32x4(0, 2, 0, 4));
         all_eq!(simd_and(x2, x1), i32x4(0, 2, 0, 4));
@@ -132,5 +135,19 @@ fn main() {
         all_eq!(simd_neg(z1), f32x4(-1.0, -2.0, -3.0, -4.0));
         all_eq!(simd_neg(z2), f32x4(-2.0, -3.0, -4.0, -5.0));
 
+        all_eq!(simd_bswap(x1), i32x4(0x01000000, 0x02000000, 0x03000000, 0x04000000));
+        all_eq_!(simd_bswap(y1), U32::<4>([0x01000000, 0x02000000, 0x03000000, 0x04000000]));
+
+        all_eq!(
+            simd_bitreverse(x1),
+            i32x4(0x80000000u32 as i32, 0x40000000, 0xc0000000u32 as i32, 0x20000000)
+        );
+        all_eq_!(simd_bitreverse(y1), U32::<4>([0x80000000, 0x40000000, 0xc0000000, 0x20000000]));
+
+        all_eq!(simd_ctlz(x1), i32x4(31, 30, 30, 29));
+        all_eq_!(simd_ctlz(y1), U32::<4>([31, 30, 30, 29]));
+
+        all_eq!(simd_cttz(x1), i32x4(0, 1, 0, 2));
+        all_eq_!(simd_cttz(y1), U32::<4>([0, 1, 0, 2]));
     }
 }