| //@ add-core-stubs |
| //@ assembly-output: emit-asm |
| //@ compile-flags: --target riscv64imac-unknown-none-elf -Ctarget-feature=+f,+d |
| //@ needs-llvm-components: riscv |
| //@ revisions: LLVM-PRE-20 LLVM-POST-20 |
| //@ [LLVM-PRE-20] max-llvm-major-version: 19 |
| //@ [LLVM-POST-20] min-llvm-version: 20 |
| |
| #![feature(no_core, lang_items, f16)] |
| #![crate_type = "lib"] |
| #![no_core] |
| |
| extern crate minicore; |
| use minicore::*; |
| |
| // This test checks that the floats are all returned in `a0` as required by the `lp64` ABI. |
| |
| // CHECK-LABEL: read_f16 |
| #[no_mangle] |
| pub extern "C" fn read_f16(x: &f16) -> f16 { |
| // CHECK: lh a0, 0(a0) |
| // CHECK-NEXT: lui a1, 1048560 |
| // CHECK-NEXT: or a0, a0, a1 |
| // CHECK-NEXT: ret |
| *x |
| } |
| |
| // CHECK-LABEL: read_f32 |
| #[no_mangle] |
| pub extern "C" fn read_f32(x: &f32) -> f32 { |
| // LLVM-PRE-20: flw fa5, 0(a0) |
| // LLVM-PRE-20-NEXT: fmv.x.w a0, fa5 |
| // LLVM-PRE-20-NEXT: ret |
| // LLVM-POST-20: lw a0, 0(a0) |
| // LLVM-POST-20-NEXT: ret |
| *x |
| } |
| |
| // CHECK-LABEL: read_f64 |
| #[no_mangle] |
| pub extern "C" fn read_f64(x: &f64) -> f64 { |
| // CHECK: ld a0, 0(a0) |
| // CHECK-NEXT: ret |
| *x |
| } |
