52 lines
1.2 KiB
Rust
52 lines
1.2 KiB
Rust
//@ assembly-output: emit-asm
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//@ compile-flags: --target riscv64imac-unknown-none-elf -Ctarget-feature=+f,+d
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//@ needs-llvm-components: riscv
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//@ revisions: LLVM-PRE-20 LLVM-POST-20
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//@ [LLVM-PRE-20] ignore-llvm-version: 20 - 99
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//@ [LLVM-POST-20] min-llvm-version: 20
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#![feature(no_core, lang_items, f16)]
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#![crate_type = "lib"]
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#![no_core]
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#[lang = "sized"]
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trait Sized {}
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#[lang = "copy"]
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trait Copy {}
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impl Copy for f16 {}
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impl Copy for f32 {}
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impl Copy for f64 {}
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// This test checks that the floats are all returned in `a0` as required by the `lp64` ABI.
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// CHECK-LABEL: read_f16
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#[no_mangle]
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pub extern "C" fn read_f16(x: &f16) -> f16 {
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// CHECK: lh a0, 0(a0)
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// CHECK-NEXT: lui a1, 1048560
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// CHECK-NEXT: or a0, a0, a1
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// CHECK-NEXT: ret
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*x
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}
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// CHECK-LABEL: read_f32
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#[no_mangle]
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pub extern "C" fn read_f32(x: &f32) -> f32 {
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// LLVM-PRE-20: flw fa5, 0(a0)
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// LLVM-PRE-20-NEXT: fmv.x.w a0, fa5
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// LLVM-PRE-20-NEXT: ret
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// LLVM-POST-20: lw a0, 0(a0)
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// LLVM-POST-20-NEXT: ret
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*x
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}
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// CHECK-LABEL: read_f64
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#[no_mangle]
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pub extern "C" fn read_f64(x: &f64) -> f64 {
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// CHECK: ld a0, 0(a0)
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// CHECK-NEXT: ret
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*x
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}
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