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tests: Update f16b codegen test for LoongArch and RISC-V #163146

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Merged
rust-bors merged 1 commit into from
Sep 23, 2026
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tests: Update f16b codegen test for LoongArch and RISC-V #163146

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57 changes: 49 additions & 8 deletions tests/codegen-llvm/float/f16b.rs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,13 @@
//@ compile-flags: -Copt-level=3
//@ revisions: GENERIC LOONGARCH32 LOONGARCH64 RISCV32 RISCV64
//@ [GENERIC] ignore-loongarch32
//@ [GENERIC] ignore-loongarch64
//@ [GENERIC] ignore-riscv32
//@ [GENERIC] ignore-riscv64
//@ [LOONGARCH32] only-loongarch32
//@ [LOONGARCH64] only-loongarch64
//@ [RISCV32] only-riscv32
//@ [RISCV64] only-riscv64

#![crate_type = "lib"]
#![feature(f16b)]
Expand All @@ -8,31 +17,63 @@ extern crate core;

use core::num::f16b;

// CHECK-LABEL: define{{.*}} bfloat @identity_f16b(bfloat
// GENERIC-LABEL: define{{.*}} bfloat @identity_f16b(bfloat
// LOONGARCH32-LABEL: define{{.*}} half @identity_f16b(half
// LOONGARCH64-LABEL: define{{.*}} half @identity_f16b(half
// RISCV32-LABEL: define{{.*}} half @identity_f16b(half
// RISCV64-LABEL: define{{.*}} half @identity_f16b(half
#[no_mangle]
pub extern "C" fn identity_f16b(value: f16b) -> f16b {
// CHECK: ret bfloat
// GENERIC: ret bfloat
// LOONGARCH32: ret half
// LOONGARCH64: ret half
// RISCV32: ret half
// RISCV64: ret half
value
}

// CHECK-LABEL: define{{.*}} i16 @f16b_to_bits(bfloat
// GENERIC-LABEL: define{{.*}} i16 @f16b_to_bits(bfloat
// LOONGARCH32-LABEL: define{{.*}} i16 @f16b_to_bits(half
// LOONGARCH64-LABEL: define{{.*}} i16 @f16b_to_bits(half
// RISCV32-LABEL: define{{.*}} i16 @f16b_to_bits(half
// RISCV64-LABEL: define{{.*}} i16 @f16b_to_bits(half
#[no_mangle]
pub extern "C" fn f16b_to_bits(value: f16b) -> u16 {
// CHECK: bitcast bfloat %value to i16
// GENERIC: bitcast bfloat %value to i16
// LOONGARCH32: bitcast half %0 to i16
// LOONGARCH64: bitcast half %0 to i16
// RISCV32: bitcast half %0 to i16
// RISCV64: bitcast half %0 to i16
value.to_bits()
}

// CHECK-LABEL: define{{.*}} bfloat @f16b_from_bits(i16
// GENERIC-LABEL: define{{.*}} bfloat @f16b_from_bits(i16
// LOONGARCH32-LABEL: define{{.*}} half @f16b_from_bits(i16
// LOONGARCH64-LABEL: define{{.*}} half @f16b_from_bits(i16
// RISCV32-LABEL: define{{.*}} half @f16b_from_bits(i16
// RISCV64-LABEL: define{{.*}} half @f16b_from_bits(i16
#[no_mangle]
pub extern "C" fn f16b_from_bits(bits: u16) -> f16b {
// CHECK: bitcast i16 %bits to bfloat
// GENERIC: bitcast i16 %bits to bfloat
// LOONGARCH32: bitcast i16 %bits to half
// LOONGARCH64: bitcast i16 %bits to half
// RISCV32: bitcast i16 %bits to half
// RISCV64: bitcast i16 %bits to half
f16b::from_bits(bits)
}

// CHECK-LABEL: define{{.*}} float @widen_f16b(bfloat
// GENERIC-LABEL: define{{.*}} float @widen_f16b(bfloat
// LOONGARCH32-LABEL: define{{.*}} float @widen_f16b(half
// LOONGARCH64-LABEL: define{{.*}} float @widen_f16b(half
// RISCV32-LABEL: define{{.*}} float @widen_f16b(half
// RISCV64-LABEL: define{{.*}} float @widen_f16b(half
#[no_mangle]
pub extern "C" fn widen_f16b(value: f16b) -> f32 {
// CHECK: bitcast bfloat %value to i16
// GENERIC: bitcast bfloat %value to i16
// LOONGARCH32: bitcast half %0 to i16
// LOONGARCH64: bitcast half %0 to i16
// RISCV32: bitcast half %0 to i16
// RISCV64: bitcast half %0 to i16
// CHECK: zext i16
// CHECK: shl nuw i32 {{.*}}, 16
// CHECK: bitcast i32 {{.*}} to float
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