cranelift: Use round_ties_even for nearest in interpreter (#4413)

As @MaxGraey pointed out (thanks!) in #4397, `round` has different
 behavior from `nearest`. And it looks like the native rust
 implementation is still pending stabilization.

 Right now we duplicate the wasmtime implementation, merged in #2171.

 However, we definitely should switch to the rust native version
 when it is available.

cranelift/filetests/filetests/runtests/ceil.clif

@@ -14,6 +14,13 @@ block0(v0: f32):
 ; run: %ceil_f32(0x1.5) == 0x1.0p1
 ; run: %ceil_f32(0x2.9) == 0x1.8p1
 ; run: %ceil_f32(0x1.1p10) == 0x1.1p10
+; run: %ceil_f32(0x1.400000p1) == 0x1.8p1
+; run: %ceil_f32(0x1.4cccccp0) == 0x1.0p1
+; run: %ceil_f32(0x1.800000p0) == 0x1.0p1
+; run: %ceil_f32(0x1.b33334p0) == 0x1.0p1
+; run: %ceil_f32(0x1.99999ap-2) == 0x1.0
+; run: %ceil_f32(0x1.333334p-1) == 0x1.0
+; run: %ceil_f32(0x1.666666p1) == 0x1.8p1
 
 ; Negatives
 ; run: %ceil_f32(-0x0.5) == -0x0.0
@@ -21,6 +28,13 @@ block0(v0: f32):
 ; run: %ceil_f32(-0x1.5) == -0x1.0
 ; run: %ceil_f32(-0x2.9) == -0x1.0p1
 ; run: %ceil_f32(-0x1.1p10) == -0x1.1p10
+; run: %ceil_f32(-0x1.333334p-1) == -0x0.0
+; run: %ceil_f32(-0x1.99999ap-2) == -0x0.0
+; run: %ceil_f32(-0x1.4cccccp0) == -0x1.0
+; run: %ceil_f32(-0x1.800000p0) == -0x1.0
+; run: %ceil_f32(-0x1.b33334p0) == -0x1.0
+; run: %ceil_f32(-0x1.400000p1) == -0x1.0p1
+; run: %ceil_f32(-0x1.666666p1) == -0x1.0p1
 
 ; Specials
 ; run: %ceil_f32(0x0.0) == 0x0.0
@@ -71,6 +85,13 @@ block0(v0: f64):
 ; run: %ceil_f64(0x1.5) == 0x1.0p1
 ; run: %ceil_f64(0x2.9) == 0x1.8p1
 ; run: %ceil_f64(0x1.1p10) == 0x1.1p10
+; run: %ceil_f64(0x1.4000000000000p1) == 0x1.8p1
+; run: %ceil_f64(0x1.4cccccccccccdp0) == 0x1.0p1
+; run: %ceil_f64(0x1.8000000000000p0) == 0x1.0p1
+; run: %ceil_f64(0x1.b333333333333p0) == 0x1.0p1
+; run: %ceil_f64(0x1.999999999999ap-2) == 0x1.0
+; run: %ceil_f64(0x1.3333333333333p-1) == 0x1.0
+; run: %ceil_f64(0x1.6666666666666p1) == 0x1.8p1
 
 ; Negatives
 ; run: %ceil_f64(-0x0.5) == -0x0.0
@@ -78,6 +99,13 @@ block0(v0: f64):
 ; run: %ceil_f64(-0x1.5) == -0x1.0
 ; run: %ceil_f64(-0x2.9) == -0x1.0p1
 ; run: %ceil_f64(-0x1.1p10) == -0x1.1p10
+; run: %ceil_f64(-0x1.3333333333333p-1) == -0x0.0
+; run: %ceil_f64(-0x1.999999999999ap-2) == -0x0.0
+; run: %ceil_f64(-0x1.4cccccccccccdp0) == -0x1.0
+; run: %ceil_f64(-0x1.8000000000000p0) == -0x1.0
+; run: %ceil_f64(-0x1.b333333333333p0) == -0x1.0
+; run: %ceil_f64(-0x1.4000000000000p1) == -0x1.0p1
+; run: %ceil_f64(-0x1.6666666666666p1) == -0x1.0p1
 
 ; Specials
 ; run: %ceil_f64(0x0.0) == 0x0.0

cranelift/filetests/filetests/runtests/floor.clif

@@ -14,6 +14,13 @@ block0(v0: f32):
 ; run: %floor_f32(0x1.5) == 0x1.0
 ; run: %floor_f32(0x2.9) == 0x1.0p1
 ; run: %floor_f32(0x1.1p10) == 0x1.1p10
+; run: %floor_f32(0x1.400000p1) == 0x1.0p1
+; run: %floor_f32(0x1.4cccccp0) == 0x1.0
+; run: %floor_f32(0x1.800000p0) == 0x1.0
+; run: %floor_f32(0x1.b33334p0) == 0x1.0
+; run: %floor_f32(0x1.99999ap-2) == 0x0.0
+; run: %floor_f32(0x1.333334p-1) == 0x0.0
+; run: %floor_f32(0x1.666666p1) == 0x1.0p1
 
 ; Negatives
 ; run: %floor_f32(-0x0.5) == -0x1.0
@@ -21,6 +28,13 @@ block0(v0: f32):
 ; run: %floor_f32(-0x1.5) == -0x1.0p1
 ; run: %floor_f32(-0x2.9) == -0x1.8p1
 ; run: %floor_f32(-0x1.1p10) == -0x1.1p10
+; run: %floor_f32(-0x1.333334p-1) == -0x1.0
+; run: %floor_f32(-0x1.99999ap-2) == -0x1.0
+; run: %floor_f32(-0x1.4cccccp0) == -0x1.0p1
+; run: %floor_f32(-0x1.800000p0) == -0x1.0p1
+; run: %floor_f32(-0x1.b33334p0) == -0x1.0p1
+; run: %floor_f32(-0x1.400000p1) == -0x1.8p1
+; run: %floor_f32(-0x1.666666p1) == -0x1.8p1
 
 ; Specials
 ; run: %floor_f32(0x0.0) == 0x0.0
@@ -71,6 +85,13 @@ block0(v0: f64):
 ; run: %floor_f64(0x1.5) == 0x1.0
 ; run: %floor_f64(0x2.9) == 0x1.0p1
 ; run: %floor_f64(0x1.1p10) == 0x1.1p10
+; run: %floor_f64(0x1.4000000000000p1) == 0x1.0p1
+; run: %floor_f64(0x1.4cccccccccccdp0) == 0x1.0
+; run: %floor_f64(0x1.8000000000000p0) == 0x1.0
+; run: %floor_f64(0x1.b333333333333p0) == 0x1.0
+; run: %floor_f64(0x1.999999999999ap-2) == 0x0.0
+; run: %floor_f64(0x1.3333333333333p-1) == 0x0.0
+; run: %floor_f64(0x1.6666666666666p1) == 0x1.0p1
 
 ; Negatives
 ; run: %floor_f64(-0x0.5) == -0x1.0
@@ -78,6 +99,13 @@ block0(v0: f64):
 ; run: %floor_f64(-0x1.5) == -0x1.0p1
 ; run: %floor_f64(-0x2.9) == -0x1.8p1
 ; run: %floor_f64(-0x1.1p10) == -0x1.1p10
+; run: %floor_f64(-0x1.3333333333333p-1) == -0x1.0
+; run: %floor_f64(-0x1.999999999999ap-2) == -0x1.0
+; run: %floor_f64(-0x1.4cccccccccccdp0) == -0x1.0p1
+; run: %floor_f64(-0x1.8000000000000p0) == -0x1.0p1
+; run: %floor_f64(-0x1.b333333333333p0) == -0x1.0p1
+; run: %floor_f64(-0x1.4000000000000p1) == -0x1.8p1
+; run: %floor_f64(-0x1.6666666666666p1) == -0x1.8p1
 
 ; Specials
 ; run: %floor_f64(0x0.0) == 0x0.0

cranelift/filetests/filetests/runtests/nearest.clif

@@ -14,6 +14,13 @@ block0(v0: f32):
 ; run: %nearest_f32(0x1.5) == 0x1.0
 ; run: %nearest_f32(0x2.9) == 0x1.8p1
 ; run: %nearest_f32(0x1.1p10) == 0x1.1p10
+; run: %nearest_f32(0x1.400000p1) == 0x1.0p1
+; run: %nearest_f32(0x1.4cccccp0) == 0x1.0
+; run: %nearest_f32(0x1.800000p0) == 0x1.0p1
+; run: %nearest_f32(0x1.b33334p0) == 0x1.0p1
+; run: %nearest_f32(0x1.99999ap-2) == 0x0.0
+; run: %nearest_f32(0x1.333334p-1) == 0x1.0
+; run: %nearest_f32(0x1.666666p1) == 0x1.8p1
 
 ; Negatives
 ; run: %nearest_f32(-0x0.5) == -0x0.0
@@ -21,6 +28,13 @@ block0(v0: f32):
 ; run: %nearest_f32(-0x1.5) == -0x1.0
 ; run: %nearest_f32(-0x2.9) == -0x1.8p1
 ; run: %nearest_f32(-0x1.1p10) == -0x1.1p10
+; run: %nearest_f32(-0x1.333334p-1) == -0x1.0
+; run: %nearest_f32(-0x1.99999ap-2) == -0x0.0
+; run: %nearest_f32(-0x1.4cccccp0) == -0x1.0
+; run: %nearest_f32(-0x1.800000p0) == -0x1.0p1
+; run: %nearest_f32(-0x1.b33334p0) == -0x1.0p1
+; run: %nearest_f32(-0x1.400000p1) == -0x1.0p1
+; run: %nearest_f32(-0x1.666666p1) == -0x1.8p1
 
 ; Specials
 ; run: %nearest_f32(0x0.0) == 0x0.0
@@ -71,6 +85,13 @@ block0(v0: f64):
 ; run: %nearest_f64(0x1.5) == 0x1.0
 ; run: %nearest_f64(0x2.9) == 0x1.8p1
 ; run: %nearest_f64(0x1.1p10) == 0x1.1p10
+; run: %nearest_f64(0x1.4000000000000p1) == 0x1.0p1
+; run: %nearest_f64(0x1.4cccccccccccdp0) == 0x1.0
+; run: %nearest_f64(0x1.8000000000000p0) == 0x1.0p1
+; run: %nearest_f64(0x1.b333333333333p0) == 0x1.0p1
+; run: %nearest_f64(0x1.999999999999ap-2) == 0x0.0
+; run: %nearest_f64(0x1.3333333333333p-1) == 0x1.0
+; run: %nearest_f64(0x1.6666666666666p1) == 0x1.8p1
 
 ; Negatives
 ; run: %nearest_f64(-0x0.5) == -0x0.0
@@ -78,6 +99,13 @@ block0(v0: f64):
 ; run: %nearest_f64(-0x1.5) == -0x1.0
 ; run: %nearest_f64(-0x2.9) == -0x1.8p1
 ; run: %nearest_f64(-0x1.1p10) == -0x1.1p10
+; run: %nearest_f64(-0x1.3333333333333p-1) == -0x1.0
+; run: %nearest_f64(-0x1.999999999999ap-2) == -0x0.0
+; run: %nearest_f64(-0x1.4cccccccccccdp0) == -0x1.0
+; run: %nearest_f64(-0x1.8000000000000p0) == -0x1.0p1
+; run: %nearest_f64(-0x1.b333333333333p0) == -0x1.0p1
+; run: %nearest_f64(-0x1.4000000000000p1) == -0x1.0p1
+; run: %nearest_f64(-0x1.6666666666666p1) == -0x1.8p1
 
 ; Specials
 ; run: %nearest_f64(0x0.0) == 0x0.0

cranelift/filetests/filetests/runtests/trunc.clif

@@ -14,6 +14,13 @@ block0(v0: f32):
 ; run: %trunc_f32(0x1.5) == 0x1.0
 ; run: %trunc_f32(0x2.9) == 0x1.0p1
 ; run: %trunc_f32(0x1.1p10) == 0x1.1p10
+; run: %trunc_f32(0x1.400000p1) == 0x1.0p1
+; run: %trunc_f32(0x1.4cccccp0) == 0x1.0
+; run: %trunc_f32(0x1.800000p0) == 0x1.0
+; run: %trunc_f32(0x1.b33334p0) == 0x1.0
+; run: %trunc_f32(0x1.99999ap-2) == 0x0.0
+; run: %trunc_f32(0x1.333334p-1) == 0x0.0
+; run: %trunc_f32(0x1.666666p1) == 0x1.0p1
 
 ; Negatives
 ; run: %trunc_f32(-0x0.5) == -0x0.0
@@ -21,6 +28,13 @@ block0(v0: f32):
 ; run: %trunc_f32(-0x1.5) == -0x1.0
 ; run: %trunc_f32(-0x2.9) == -0x1.0p1
 ; run: %trunc_f32(-0x1.1p10) == -0x1.1p10
+; run: %trunc_f32(-0x1.333334p-1) == -0x0.0
+; run: %trunc_f32(-0x1.99999ap-2) == -0x0.0
+; run: %trunc_f32(-0x1.4cccccp0) == -0x1.0
+; run: %trunc_f32(-0x1.800000p0) == -0x1.0
+; run: %trunc_f32(-0x1.b33334p0) == -0x1.0
+; run: %trunc_f32(-0x1.400000p1) == -0x1.0p1
+; run: %trunc_f32(-0x1.666666p1) == -0x1.0p1
 
 ; Specials
 ; run: %trunc_f32(0x0.0) == 0x0.0
@@ -71,6 +85,13 @@ block0(v0: f64):
 ; run: %trunc_f64(0x1.5) == 0x1.0
 ; run: %trunc_f64(0x2.9) == 0x1.0p1
 ; run: %trunc_f64(0x1.1p10) == 0x1.1p10
+; run: %trunc_f64(0x1.4000000000000p1) == 0x1.0p1
+; run: %trunc_f64(0x1.4cccccccccccdp0) == 0x1.0
+; run: %trunc_f64(0x1.8000000000000p0) == 0x1.0
+; run: %trunc_f64(0x1.b333333333333p0) == 0x1.0
+; run: %trunc_f64(0x1.999999999999ap-2) == 0x0.0
+; run: %trunc_f64(0x1.3333333333333p-1) == 0x0.0
+; run: %trunc_f64(0x1.6666666666666p1) == 0x1.0p1
 
 ; Negatives
 ; run: %trunc_f64(-0x0.5) == -0x0.0
@@ -78,6 +99,13 @@ block0(v0: f64):
 ; run: %trunc_f64(-0x1.5) == -0x1.0
 ; run: %trunc_f64(-0x2.9) == -0x1.0p1
 ; run: %trunc_f64(-0x1.1p10) == -0x1.1p10
+; run: %trunc_f64(-0x1.3333333333333p-1) == -0x0.0
+; run: %trunc_f64(-0x1.999999999999ap-2) == -0x0.0
+; run: %trunc_f64(-0x1.4cccccccccccdp0) == -0x1.0
+; run: %trunc_f64(-0x1.8000000000000p0) == -0x1.0
+; run: %trunc_f64(-0x1.b333333333333p0) == -0x1.0
+; run: %trunc_f64(-0x1.4000000000000p1) == -0x1.0p1
+; run: %trunc_f64(-0x1.6666666666666p1) == -0x1.0p1
 
 ; Specials
 ; run: %trunc_f64(0x0.0) == 0x0.0