cranelift: Implement float rounding operations (#4397)

Implements the following operations on the interpreter:
* `ceil`
* `floor`
* `nearest`
* `trunc`

cranelift/codegen/src/ir/immediates.rs

@@ -800,6 +800,26 @@ impl Ieee32 {
     pub fn is_zero(&self) -> bool {
         self.as_f32() == 0.0
     }
+
+    /// Returns the smallest integer greater than or equal to `self`.
+    pub fn ceil(self) -> Self {
+        Self::with_float(self.as_f32().ceil())
+    }
+
+    /// Returns the largest integer less than or equal to `self`.
+    pub fn floor(self) -> Self {
+        Self::with_float(self.as_f32().floor())
+    }
+
+    /// Returns the integer part of `self`. This means that non-integer numbers are always truncated towards zero.
+    pub fn trunc(self) -> Self {
+        Self::with_float(self.as_f32().trunc())
+    }
+
+    /// Returns the nearest integer to `self`. Round half-way cases away from `0.0`.
+    pub fn nearest(self) -> Self {
+        Self::with_float(self.as_f32().round())
+    }
 }
 
 impl PartialOrd for Ieee32 {
@@ -929,6 +949,26 @@ impl Ieee64 {
     pub fn is_zero(&self) -> bool {
         self.as_f64() == 0.0
     }
+
+    /// Returns the smallest integer greater than or equal to `self`.
+    pub fn ceil(self) -> Self {
+        Self::with_float(self.as_f64().ceil())
+    }
+
+    /// Returns the largest integer less than or equal to `self`.
+    pub fn floor(self) -> Self {
+        Self::with_float(self.as_f64().floor())
+    }
+
+    /// Returns the integer part of `self`. This means that non-integer numbers are always truncated towards zero.
+    pub fn trunc(self) -> Self {
+        Self::with_float(self.as_f64().trunc())
+    }
+
+    /// Returns the nearest integer to `self`. Round half-way cases away from `0.0`.
+    pub fn nearest(self) -> Self {
+        Self::with_float(self.as_f64().round())
+    }
 }
 
 impl PartialOrd for Ieee64 {

cranelift/filetests/filetests/runtests/ceil.clif

@@ -0,0 +1,119 @@
+test interpret
+test run
+target x86_64
+target aarch64
+target s390x
+
+function %ceil_f32(f32) -> f32 {
+block0(v0: f32):
+    v1 = ceil v0
+    return v1
+}
+; run: %ceil_f32(0x0.5) == 0x1.0
+; run: %ceil_f32(0x1.0) == 0x1.0
+; run: %ceil_f32(0x1.5) == 0x1.0p1
+; run: %ceil_f32(0x2.9) == 0x1.8p1
+; run: %ceil_f32(0x1.1p10) == 0x1.1p10
+
+; Negatives
+; run: %ceil_f32(-0x0.5) == -0x0.0
+; run: %ceil_f32(-0x1.0) == -0x1.0
+; run: %ceil_f32(-0x1.5) == -0x1.0
+; run: %ceil_f32(-0x2.9) == -0x1.0p1
+; run: %ceil_f32(-0x1.1p10) == -0x1.1p10
+
+; Specials
+; run: %ceil_f32(0x0.0) == 0x0.0
+; run: %ceil_f32(-0x0.0) == -0x0.0
+; run: %ceil_f32(+Inf) == +Inf
+; run: %ceil_f32(-Inf) == -Inf
+
+; F32 Epsilon / Max / Min Positive
+; run: %ceil_f32(0x1.000000p-23) == 0x1.0
+; run: %ceil_f32(0x1.fffffep127) == 0x1.fffffep127
+; run: %ceil_f32(0x1.000000p-126) == 0x1.0
+
+; F32 Subnormals
+; run: %ceil_f32(0x0.800000p-126) ==  0x1.0
+; run: %ceil_f32(-0x0.800002p-126) == -0x0.0
+
+; F32 NaN's
+; For NaN's this operation is specified as producing a value that is a NaN
+function %ceil_is_nan_f32(f32) -> i32 {
+block0(v0: f32):
+    v1 = ceil v0
+    v2 = fcmp ne v1, v1
+    v3 = bint.i32 v2
+    return v3
+}
+; run: %ceil_is_nan_f32(+NaN) == 1
+; run: %ceil_is_nan_f32(-NaN) == 1
+; run: %ceil_is_nan_f32(+NaN:0x0) == 1
+; run: %ceil_is_nan_f32(+NaN:0x1) == 1
+; run: %ceil_is_nan_f32(+NaN:0x300001) == 1
+; run: %ceil_is_nan_f32(-NaN:0x0) == 1
+; run: %ceil_is_nan_f32(-NaN:0x1) == 1
+; run: %ceil_is_nan_f32(-NaN:0x300001) == 1
+; run: %ceil_is_nan_f32(+sNaN:0x1) == 1
+; run: %ceil_is_nan_f32(-sNaN:0x1) == 1
+; run: %ceil_is_nan_f32(+sNaN:0x200001) == 1
+; run: %ceil_is_nan_f32(-sNaN:0x200001) == 1
+
+
+
+function %ceil_f64(f64) -> f64 {
+block0(v0: f64):
+    v1 = ceil v0
+    return v1
+}
+; run: %ceil_f64(0x0.5) == 0x1.0
+; run: %ceil_f64(0x1.0) == 0x1.0
+; run: %ceil_f64(0x1.5) == 0x1.0p1
+; run: %ceil_f64(0x2.9) == 0x1.8p1
+; run: %ceil_f64(0x1.1p10) == 0x1.1p10
+
+; Negatives
+; run: %ceil_f64(-0x0.5) == -0x0.0
+; run: %ceil_f64(-0x1.0) == -0x1.0
+; run: %ceil_f64(-0x1.5) == -0x1.0
+; run: %ceil_f64(-0x2.9) == -0x1.0p1
+; run: %ceil_f64(-0x1.1p10) == -0x1.1p10
+
+; Specials
+; run: %ceil_f64(0x0.0) == 0x0.0
+; run: %ceil_f64(-0x0.0) == -0x0.0
+; run: %ceil_f64(+Inf) == +Inf
+; run: %ceil_f64(-Inf) == -Inf
+
+; F64 Epsilon / Max / Min Positive
+; run: %ceil_f64(0x1.0000000000000p-52) == 0x1.0
+; run: %ceil_f64(0x1.fffffffffffffp1023) == 0x1.fffffffffffffp1023
+; run: %ceil_f64(0x1.0000000000000p-1022) == 0x1.0
+
+; F64 Subnormals
+; run: %ceil_f64(0x0.8000000000000p-1022) == 0x1.0
+; run: %ceil_f64(-0x0.8000000000000p-1022) == -0x0.0
+
+
+
+; F64 NaN's
+; For NaN's this operation is specified as producing a value that is a NaN
+function %ceil_is_nan_f64(f64) -> i32 {
+block0(v0: f64):
+    v1 = ceil v0
+    v2 = fcmp ne v1, v1
+    v3 = bint.i32 v2
+    return v3
+}
+; run: %ceil_is_nan_f64(+NaN) == 1
+; run: %ceil_is_nan_f64(-NaN) == 1
+; run: %ceil_is_nan_f64(+NaN:0x0) == 1
+; run: %ceil_is_nan_f64(+NaN:0x1) == 1
+; run: %ceil_is_nan_f64(+NaN:0x4000000000001) == 1
+; run: %ceil_is_nan_f64(-NaN:0x0) == 1
+; run: %ceil_is_nan_f64(-NaN:0x1) == 1
+; run: %ceil_is_nan_f64(-NaN:0x4000000000001) == 1
+; run: %ceil_is_nan_f64(+sNaN:0x1) == 1
+; run: %ceil_is_nan_f64(-sNaN:0x1) == 1
+; run: %ceil_is_nan_f64(+sNaN:0x4000000000001) == 1
+; run: %ceil_is_nan_f64(-sNaN:0x4000000000001) == 1

cranelift/filetests/filetests/runtests/floor.clif

@@ -0,0 +1,119 @@
+test interpret
+test run
+target x86_64
+target aarch64
+target s390x
+
+function %floor_f32(f32) -> f32 {
+block0(v0: f32):
+    v1 = floor v0
+    return v1
+}
+; run: %floor_f32(0x0.5) == 0x0.0
+; run: %floor_f32(0x1.0) == 0x1.0
+; run: %floor_f32(0x1.5) == 0x1.0
+; run: %floor_f32(0x2.9) == 0x1.0p1
+; run: %floor_f32(0x1.1p10) == 0x1.1p10
+
+; Negatives
+; run: %floor_f32(-0x0.5) == -0x1.0
+; run: %floor_f32(-0x1.0) == -0x1.0
+; run: %floor_f32(-0x1.5) == -0x1.0p1
+; run: %floor_f32(-0x2.9) == -0x1.8p1
+; run: %floor_f32(-0x1.1p10) == -0x1.1p10
+
+; Specials
+; run: %floor_f32(0x0.0) == 0x0.0
+; run: %floor_f32(-0x0.0) == -0x0.0
+; run: %floor_f32(+Inf) == +Inf
+; run: %floor_f32(-Inf) == -Inf
+
+; F32 Epsilon / Max / Min Positive
+; run: %floor_f32(0x1.000000p-23) == 0x0.0
+; run: %floor_f32(0x1.fffffep127) == 0x1.fffffep127
+; run: %floor_f32(0x1.000000p-126) == 0x0.0
+
+; F32 Subnormals
+; run: %floor_f32(0x0.800000p-126) ==  0x0.0
+; run: %floor_f32(-0x0.800002p-126) == -0x1.0
+
+; F32 NaN's
+; For NaN's this operation is specified as producing a value that is a NaN
+function %floor_is_nan_f32(f32) -> i32 {
+block0(v0: f32):
+    v1 = floor v0
+    v2 = fcmp ne v1, v1
+    v3 = bint.i32 v2
+    return v3
+}
+; run: %floor_is_nan_f32(+NaN) == 1
+; run: %floor_is_nan_f32(-NaN) == 1
+; run: %floor_is_nan_f32(+NaN:0x0) == 1
+; run: %floor_is_nan_f32(+NaN:0x1) == 1
+; run: %floor_is_nan_f32(+NaN:0x300001) == 1
+; run: %floor_is_nan_f32(-NaN:0x0) == 1
+; run: %floor_is_nan_f32(-NaN:0x1) == 1
+; run: %floor_is_nan_f32(-NaN:0x300001) == 1
+; run: %floor_is_nan_f32(+sNaN:0x1) == 1
+; run: %floor_is_nan_f32(-sNaN:0x1) == 1
+; run: %floor_is_nan_f32(+sNaN:0x200001) == 1
+; run: %floor_is_nan_f32(-sNaN:0x200001) == 1
+
+
+
+function %floor_f64(f64) -> f64 {
+block0(v0: f64):
+    v1 = floor v0
+    return v1
+}
+; run: %floor_f64(0x0.5) == 0x0.0
+; run: %floor_f64(0x1.0) == 0x1.0
+; run: %floor_f64(0x1.5) == 0x1.0
+; run: %floor_f64(0x2.9) == 0x1.0p1
+; run: %floor_f64(0x1.1p10) == 0x1.1p10
+
+; Negatives
+; run: %floor_f64(-0x0.5) == -0x1.0
+; run: %floor_f64(-0x1.0) == -0x1.0
+; run: %floor_f64(-0x1.5) == -0x1.0p1
+; run: %floor_f64(-0x2.9) == -0x1.8p1
+; run: %floor_f64(-0x1.1p10) == -0x1.1p10
+
+; Specials
+; run: %floor_f64(0x0.0) == 0x0.0
+; run: %floor_f64(-0x0.0) == -0x0.0
+; run: %floor_f64(+Inf) == +Inf
+; run: %floor_f64(-Inf) == -Inf
+
+; F64 Epsilon / Max / Min Positive
+; run: %floor_f64(0x1.0000000000000p-52) == 0x0.0
+; run: %floor_f64(0x1.fffffffffffffp1023) == 0x1.fffffffffffffp1023
+; run: %floor_f64(0x1.0000000000000p-1022) == 0x0.0
+
+; F64 Subnormals
+; run: %floor_f64(0x0.8000000000000p-1022) == 0x0.0
+; run: %floor_f64(-0x0.8000000000000p-1022) == -0x1.0
+
+
+
+; F64 NaN's
+; For NaN's this operation is specified as producing a value that is a NaN
+function %floor_is_nan_f64(f64) -> i32 {
+block0(v0: f64):
+    v1 = floor v0
+    v2 = fcmp ne v1, v1
+    v3 = bint.i32 v2
+    return v3
+}
+; run: %floor_is_nan_f64(+NaN) == 1
+; run: %floor_is_nan_f64(-NaN) == 1
+; run: %floor_is_nan_f64(+NaN:0x0) == 1
+; run: %floor_is_nan_f64(+NaN:0x1) == 1
+; run: %floor_is_nan_f64(+NaN:0x4000000000001) == 1
+; run: %floor_is_nan_f64(-NaN:0x0) == 1
+; run: %floor_is_nan_f64(-NaN:0x1) == 1
+; run: %floor_is_nan_f64(-NaN:0x4000000000001) == 1
+; run: %floor_is_nan_f64(+sNaN:0x1) == 1
+; run: %floor_is_nan_f64(-sNaN:0x1) == 1
+; run: %floor_is_nan_f64(+sNaN:0x4000000000001) == 1
+; run: %floor_is_nan_f64(-sNaN:0x4000000000001) == 1

cranelift/filetests/filetests/runtests/nearest.clif

@@ -0,0 +1,119 @@
+test interpret
+test run
+target x86_64
+target aarch64
+target s390x
+
+function %nearest_f32(f32) -> f32 {
+block0(v0: f32):
+    v1 = nearest v0
+    return v1
+}
+; run: %nearest_f32(0x0.5) == 0x0.0
+; run: %nearest_f32(0x1.0) == 0x1.0
+; run: %nearest_f32(0x1.5) == 0x1.0
+; run: %nearest_f32(0x2.9) == 0x1.8p1
+; run: %nearest_f32(0x1.1p10) == 0x1.1p10
+
+; Negatives
+; run: %nearest_f32(-0x0.5) == -0x0.0
+; run: %nearest_f32(-0x1.0) == -0x1.0
+; run: %nearest_f32(-0x1.5) == -0x1.0
+; run: %nearest_f32(-0x2.9) == -0x1.8p1
+; run: %nearest_f32(-0x1.1p10) == -0x1.1p10
+
+; Specials
+; run: %nearest_f32(0x0.0) == 0x0.0
+; run: %nearest_f32(-0x0.0) == -0x0.0
+; run: %nearest_f32(+Inf) == +Inf
+; run: %nearest_f32(-Inf) == -Inf
+
+; F32 Epsilon / Max / Min Positive
+; run: %nearest_f32(0x1.000000p-23) == 0x0.0
+; run: %nearest_f32(0x1.fffffep127) == 0x1.fffffep127
+; run: %nearest_f32(0x1.000000p-126) == 0x0.0
+
+; F32 Subnormals
+; run: %nearest_f32(0x0.800000p-126) ==  0x0.0
+; run: %nearest_f32(-0x0.800002p-126) == -0x0.0
+
+; F32 NaN's
+; For NaN's this operation is specified as producing a value that is a NaN
+function %near_is_nan_f32(f32) -> i32 {
+block0(v0: f32):
+    v1 = nearest v0
+    v2 = fcmp ne v1, v1
+    v3 = bint.i32 v2
+    return v3
+}
+; run: %near_is_nan_f32(+NaN) == 1
+; run: %near_is_nan_f32(-NaN) == 1
+; run: %near_is_nan_f32(+NaN:0x0) == 1
+; run: %near_is_nan_f32(+NaN:0x1) == 1
+; run: %near_is_nan_f32(+NaN:0x300001) == 1
+; run: %near_is_nan_f32(-NaN:0x0) == 1
+; run: %near_is_nan_f32(-NaN:0x1) == 1
+; run: %near_is_nan_f32(-NaN:0x300001) == 1
+; run: %near_is_nan_f32(+sNaN:0x1) == 1
+; run: %near_is_nan_f32(-sNaN:0x1) == 1
+; run: %near_is_nan_f32(+sNaN:0x200001) == 1
+; run: %near_is_nan_f32(-sNaN:0x200001) == 1
+
+
+
+function %nearest_f64(f64) -> f64 {
+block0(v0: f64):
+    v1 = nearest v0
+    return v1
+}
+; run: %nearest_f64(0x0.5) == 0x0.0
+; run: %nearest_f64(0x1.0) == 0x1.0
+; run: %nearest_f64(0x1.5) == 0x1.0
+; run: %nearest_f64(0x2.9) == 0x1.8p1
+; run: %nearest_f64(0x1.1p10) == 0x1.1p10
+
+; Negatives
+; run: %nearest_f64(-0x0.5) == -0x0.0
+; run: %nearest_f64(-0x1.0) == -0x1.0
+; run: %nearest_f64(-0x1.5) == -0x1.0
+; run: %nearest_f64(-0x2.9) == -0x1.8p1
+; run: %nearest_f64(-0x1.1p10) == -0x1.1p10
+
+; Specials
+; run: %nearest_f64(0x0.0) == 0x0.0
+; run: %nearest_f64(-0x0.0) == -0x0.0
+; run: %nearest_f64(+Inf) == +Inf
+; run: %nearest_f64(-Inf) == -Inf
+
+; F64 Epsilon / Max / Min Positive
+; run: %nearest_f64(0x1.0000000000000p-52) == 0x0.0
+; run: %nearest_f64(0x1.fffffffffffffp1023) == 0x1.fffffffffffffp1023
+; run: %nearest_f64(0x1.0000000000000p-1022) == 0x0.0
+
+; F64 Subnormals
+; run: %nearest_f64(0x0.8000000000000p-1022) == 0x0.0
+; run: %nearest_f64(-0x0.8000000000000p-1022) == -0x0.0
+
+
+
+; F64 NaN's
+; For NaN's this operation is specified as producing a value that is a NaN
+function %near_is_nan_f64(f64) -> i32 {
+block0(v0: f64):
+    v1 = nearest v0
+    v2 = fcmp ne v1, v1
+    v3 = bint.i32 v2
+    return v3
+}
+; run: %near_is_nan_f64(+NaN) == 1
+; run: %near_is_nan_f64(-NaN) == 1
+; run: %near_is_nan_f64(+NaN:0x0) == 1
+; run: %near_is_nan_f64(+NaN:0x1) == 1
+; run: %near_is_nan_f64(+NaN:0x4000000000001) == 1
+; run: %near_is_nan_f64(-NaN:0x0) == 1
+; run: %near_is_nan_f64(-NaN:0x1) == 1
+; run: %near_is_nan_f64(-NaN:0x4000000000001) == 1
+; run: %near_is_nan_f64(+sNaN:0x1) == 1
+; run: %near_is_nan_f64(-sNaN:0x1) == 1
+; run: %near_is_nan_f64(+sNaN:0x4000000000001) == 1
+; run: %near_is_nan_f64(-sNaN:0x4000000000001) == 1

cranelift/filetests/filetests/runtests/trunc.clif

@@ -0,0 +1,119 @@
+test interpret
+test run
+target x86_64
+target aarch64
+target s390x
+
+function %trunc_f32(f32) -> f32 {
+block0(v0: f32):
+    v1 = trunc v0
+    return v1
+}
+; run: %trunc_f32(0x0.5) == 0x0.0
+; run: %trunc_f32(0x1.0) == 0x1.0
+; run: %trunc_f32(0x1.5) == 0x1.0
+; run: %trunc_f32(0x2.9) == 0x1.0p1
+; run: %trunc_f32(0x1.1p10) == 0x1.1p10
+
+; Negatives
+; run: %trunc_f32(-0x0.5) == -0x0.0
+; run: %trunc_f32(-0x1.0) == -0x1.0
+; run: %trunc_f32(-0x1.5) == -0x1.0
+; run: %trunc_f32(-0x2.9) == -0x1.0p1
+; run: %trunc_f32(-0x1.1p10) == -0x1.1p10
+
+; Specials
+; run: %trunc_f32(0x0.0) == 0x0.0
+; run: %trunc_f32(-0x0.0) == -0x0.0
+; run: %trunc_f32(+Inf) == +Inf
+; run: %trunc_f32(-Inf) == -Inf
+
+; F32 Epsilon / Max / Min Positive
+; run: %trunc_f32(0x1.000000p-23) == 0x0.0
+; run: %trunc_f32(0x1.fffffep127) == 0x1.fffffep127
+; run: %trunc_f32(0x1.000000p-126) == 0x0.0
+
+; F32 Subnormals
+; run: %trunc_f32(0x0.800000p-126) ==  0x0.0
+; run: %trunc_f32(-0x0.800002p-126) == -0x0.0
+
+; F32 NaN's
+; For NaN's this operation is specified as producing a value that is a NaN
+function %trunc_is_nan_f32(f32) -> i32 {
+block0(v0: f32):
+    v1 = trunc v0
+    v2 = fcmp ne v1, v1
+    v3 = bint.i32 v2
+    return v3
+}
+; run: %trunc_is_nan_f32(+NaN) == 1
+; run: %trunc_is_nan_f32(-NaN) == 1
+; run: %trunc_is_nan_f32(+NaN:0x0) == 1
+; run: %trunc_is_nan_f32(+NaN:0x1) == 1
+; run: %trunc_is_nan_f32(+NaN:0x300001) == 1
+; run: %trunc_is_nan_f32(-NaN:0x0) == 1
+; run: %trunc_is_nan_f32(-NaN:0x1) == 1
+; run: %trunc_is_nan_f32(-NaN:0x300001) == 1
+; run: %trunc_is_nan_f32(+sNaN:0x1) == 1
+; run: %trunc_is_nan_f32(-sNaN:0x1) == 1
+; run: %trunc_is_nan_f32(+sNaN:0x200001) == 1
+; run: %trunc_is_nan_f32(-sNaN:0x200001) == 1
+
+
+
+function %trunc_f64(f64) -> f64 {
+block0(v0: f64):
+    v1 = trunc v0
+    return v1
+}
+; run: %trunc_f64(0x0.5) == 0x0.0
+; run: %trunc_f64(0x1.0) == 0x1.0
+; run: %trunc_f64(0x1.5) == 0x1.0
+; run: %trunc_f64(0x2.9) == 0x1.0p1
+; run: %trunc_f64(0x1.1p10) == 0x1.1p10
+
+; Negatives
+; run: %trunc_f64(-0x0.5) == -0x0.0
+; run: %trunc_f64(-0x1.0) == -0x1.0
+; run: %trunc_f64(-0x1.5) == -0x1.0
+; run: %trunc_f64(-0x2.9) == -0x1.0p1
+; run: %trunc_f64(-0x1.1p10) == -0x1.1p10
+
+; Specials
+; run: %trunc_f64(0x0.0) == 0x0.0
+; run: %trunc_f64(-0x0.0) == -0x0.0
+; run: %trunc_f64(+Inf) == +Inf
+; run: %trunc_f64(-Inf) == -Inf
+
+; F64 Epsilon / Max / Min Positive
+; run: %trunc_f64(0x1.0000000000000p-52) == 0x0.0
+; run: %trunc_f64(0x1.fffffffffffffp1023) == 0x1.fffffffffffffp1023
+; run: %trunc_f64(0x1.0000000000000p-1022) == 0x0.0
+
+; F64 Subnormals
+; run: %trunc_f64(0x0.8000000000000p-1022) == 0x0.0
+; run: %trunc_f64(-0x0.8000000000000p-1022) == -0x0.0
+
+
+
+; F64 NaN's
+; For NaN's this operation is specified as producing a value that is a NaN
+function %trunc_is_nan_f64(f64) -> i32 {
+block0(v0: f64):
+    v1 = trunc v0
+    v2 = fcmp ne v1, v1
+    v3 = bint.i32 v2
+    return v3
+}
+; run: %trunc_is_nan_f64(+NaN) == 1
+; run: %trunc_is_nan_f64(-NaN) == 1
+; run: %trunc_is_nan_f64(+NaN:0x0) == 1
+; run: %trunc_is_nan_f64(+NaN:0x1) == 1
+; run: %trunc_is_nan_f64(+NaN:0x4000000000001) == 1
+; run: %trunc_is_nan_f64(-NaN:0x0) == 1
+; run: %trunc_is_nan_f64(-NaN:0x1) == 1
+; run: %trunc_is_nan_f64(-NaN:0x4000000000001) == 1
+; run: %trunc_is_nan_f64(+sNaN:0x1) == 1
+; run: %trunc_is_nan_f64(-sNaN:0x1) == 1
+; run: %trunc_is_nan_f64(+sNaN:0x4000000000001) == 1
+; run: %trunc_is_nan_f64(-sNaN:0x4000000000001) == 1

cranelift/interpreter/src/step.rs

@@ -728,10 +728,10 @@ where
             (a, b) if a.is_zero()? && b.is_zero()? => a,
             (a, b) => a.max(b)?,
         }),
-        Opcode::Ceil => unimplemented!("Ceil"),
+        Opcode::Ceil => assign(Value::ceil(arg(0)?)?),
-        Opcode::Floor => unimplemented!("Floor"),
+        Opcode::Floor => assign(Value::floor(arg(0)?)?),
-        Opcode::Trunc => unimplemented!("Trunc"),
+        Opcode::Trunc => assign(Value::trunc(arg(0)?)?),
-        Opcode::Nearest => unimplemented!("Nearest"),
+        Opcode::Nearest => assign(Value::nearest(arg(0)?)?),
         Opcode::IsNull => unimplemented!("IsNull"),
         Opcode::IsInvalid => unimplemented!("IsInvalid"),
         Opcode::Trueif => choose(

cranelift/interpreter/src/value.rs

@@ -60,6 +60,10 @@ pub trait Value: Clone + From<DataValue> {
     // Float operations
     fn neg(self) -> ValueResult<Self>;
     fn copysign(self, sign: Self) -> ValueResult<Self>;
+    fn ceil(self) -> ValueResult<Self>;
+    fn floor(self) -> ValueResult<Self>;
+    fn trunc(self) -> ValueResult<Self>;
+    fn nearest(self) -> ValueResult<Self>;
 
     // Saturating arithmetic.
     fn add_sat(self, other: Self) -> ValueResult<Self>;
@@ -517,6 +521,22 @@ impl Value for DataValue {
         binary_match!(copysign(&self, &sign); [F32, F64])
     }
 
+    fn ceil(self) -> ValueResult<Self> {
+        unary_match!(ceil(&self); [F32, F64])
+    }
+
+    fn floor(self) -> ValueResult<Self> {
+        unary_match!(floor(&self); [F32, F64])
+    }
+
+    fn trunc(self) -> ValueResult<Self> {
+        unary_match!(trunc(&self); [F32, F64])
+    }
+
+    fn nearest(self) -> ValueResult<Self> {
+        unary_match!(nearest(&self); [F32, F64])
+    }
+
     fn add_sat(self, other: Self) -> ValueResult<Self> {
         binary_match!(saturating_add(self, &other); [I8, I16, I32, I64, I128, U8, U16, U32, U64, U128])
     }