9907ad6ed9
- Round to zero, and representable values cast directly.
- `NaN` goes to 0
- Values beyond the limits of the type are saturated to the "nearest value"
(essentially rounding to zero, in some sense) in the integral type, so e.g.
`f32::INFINITY` would go to `{u,i}N::MAX.`
35 lines
757 B
Rust
35 lines
757 B
Rust
// This file tests that we don't generate any code for saturation when using the
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// unchecked intrinsics.
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// compile-flags: -C opt-level=3
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#![crate_type = "lib"]
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// CHECK-LABEL: @f32_to_u32
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#[no_mangle]
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pub fn f32_to_u32(x: f32) -> u32 {
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// CHECK: fptoui
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// CHECK-NOT: fcmp
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// CHECK-NOT: icmp
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// CHECK-NOT: select
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unsafe { x.to_int_unchecked() }
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}
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// CHECK-LABEL: @f32_to_i32
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#[no_mangle]
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pub fn f32_to_i32(x: f32) -> i32 {
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// CHECK: fptosi
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// CHECK-NOT: fcmp
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// CHECK-NOT: icmp
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// CHECK-NOT: select
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unsafe { x.to_int_unchecked() }
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}
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#[no_mangle]
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pub fn f64_to_u16(x: f64) -> u16 {
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// CHECK: fptoui
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// CHECK-NOT: fcmp
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// CHECK-NOT: icmp
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// CHECK-NOT: select
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unsafe { x.to_int_unchecked() }
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}
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