add a csky-unknown-linux-gnuabiv2hf target

compiler/rustc_target/src/spec/csky_unknown_linux_gnuabiv2.rs

@@ -12,7 +12,7 @@ pub fn target() -> Target {
         options: TargetOptions {
             abi: "abiv2".into(),
             features: "+2e3,+3e7,+7e10,+cache,+dsp1e2,+dspe60,+e1,+e2,+edsp,+elrw,+hard-tp,+high-registers,+hwdiv,+mp,+mp1e2,+nvic,+trust".into(),
-            late_link_args_static: TargetOptions::link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-l:libatomic.a"]),
+            late_link_args: TargetOptions::link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-l:libatomic.a"]),
             max_atomic_width: Some(32),
             ..super::linux_gnu_base::opts()
         },

compiler/rustc_target/src/spec/csky_unknown_linux_gnuabiv2hf.rs

@@ -0,0 +1,21 @@
+use crate::spec::{Cc, LinkerFlavor, Lld, Target, TargetOptions};
+
+// This target is for glibc Linux on Csky
+
+pub fn target() -> Target {
+    Target {
+        //https://github.com/llvm/llvm-project/blob/8b76aea8d8b1b71f6220bc2845abc749f18a19b7/clang/lib/Basic/Targets/CSKY.h
+        llvm_target: "csky-unknown-linux-gnuabiv2".into(),
+        pointer_width: 32,
+        data_layout: "e-m:e-S32-p:32:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:32-v128:32:32-a:0:32-Fi32-n32".into(),
+        arch: "csky".into(),
+        options: TargetOptions {
+            abi: "abiv2hf".into(),
+            cpu: "ck860fv".into(),
+            features: "+hard-float,+hard-float-abi,+2e3,+3e7,+7e10,+cache,+dsp1e2,+dspe60,+e1,+e2,+edsp,+elrw,+hard-tp,+high-registers,+hwdiv,+mp,+mp1e2,+nvic,+trust".into(),
+            late_link_args: TargetOptions::link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-l:libatomic.a", "-mhard-float"]),
+            max_atomic_width: Some(32),
+            ..super::linux_gnu_base::opts()
+        },
+    }
+}

compiler/rustc_target/src/spec/mod.rs

@@ -1344,6 +1344,7 @@ supported_targets! {
     ("loongarch64-unknown-linux-gnu", loongarch64_unknown_linux_gnu),
     ("m68k-unknown-linux-gnu", m68k_unknown_linux_gnu),
     ("csky-unknown-linux-gnuabiv2", csky_unknown_linux_gnuabiv2),
+    ("csky-unknown-linux-gnuabiv2hf", csky_unknown_linux_gnuabiv2hf),
     ("mips-unknown-linux-gnu", mips_unknown_linux_gnu),
     ("mips64-unknown-linux-gnuabi64", mips64_unknown_linux_gnuabi64),
     ("mips64el-unknown-linux-gnuabi64", mips64el_unknown_linux_gnuabi64),

src/doc/rustc/src/SUMMARY.md

@@ -33,7 +33,7 @@
     - [\*-esp-espidf](platform-support/esp-idf.md)
     - [\*-unknown-fuchsia](platform-support/fuchsia.md)
     - [\*-kmc-solid_\*](platform-support/kmc-solid.md)
-    - [csky-unknown-linux-gnuabiv2](platform-support/csky-unknown-linux-gnuabiv2.md)
+    - [csky-unknown-linux-gnuabiv2\*](platform-support/csky-unknown-linux-gnuabiv2.md)
     - [loongarch\*-unknown-linux-\*](platform-support/loongarch-linux.md)
     - [loongarch\*-unknown-none\*](platform-support/loongarch-none.md)
     - [m68k-unknown-linux-gnu](platform-support/m68k-unknown-linux-gnu.md)

src/doc/rustc/src/platform-support.md

@@ -259,7 +259,8 @@ target | std | host | notes
 `avr-unknown-gnu-atmega328` | * |  | AVR. Requires `-Z build-std=core`
 `bpfeb-unknown-none` | * |  | BPF (big endian)
 `bpfel-unknown-none` | * |  | BPF (little endian)
-`csky-unknown-linux-gnuabiv2` | ✓ |  | C-SKY abiv2 Linux(little endian)
+`csky-unknown-linux-gnuabiv2` | ✓ |  | C-SKY abiv2 Linux (little endian)
+`csky-unknown-linux-gnuabiv2hf` | ✓ |  | C-SKY abiv2 Linux, hardfloat (little endian)
 `hexagon-unknown-linux-musl` | ? |  |
 `i386-apple-ios` | ✓ |  | 32-bit x86 iOS [^x86_32-floats-return-ABI]
 [`i586-pc-nto-qnx700`](platform-support/nto-qnx.md) | * |  | 32-bit x86 QNX Neutrino 7.0 RTOS  [^x86_32-floats-return-ABI]

src/doc/rustc/src/platform-support/csky-unknown-linux-gnuabiv2.md

@@ -4,7 +4,14 @@
 
 This target supports [C-SKY](https://github.com/c-sky) CPUs with `abi` v2 and `glibc`.
 
+target | std | host | notes
+-------|:---:|:----:|-------
+`csky-unknown-linux-gnuabiv2` | ✓ |  | C-SKY abiv2 Linux (little endian)
+`csky-unknown-linux-gnuabiv2hf` | ✓ |  | C-SKY abiv2 Linux, hardfloat (little endian)
+
+Reference:
 https://c-sky.github.io/
+
 https://gitlab.com/c-sky/
 
 ## Target maintainers
@@ -13,7 +20,6 @@ https://gitlab.com/c-sky/
 
 ## Requirements
 
-
 ## Building the target
 
 ### Get a C toolchain
@@ -28,13 +34,17 @@ The target can be built by enabling it for a `rustc` build, by placing the follo
 
 ```toml
 [build]
-target = ["x86_64-unknown-linux-gnu", "csky-unknown-linux-gnuabiv2"]
+target = ["x86_64-unknown-linux-gnu", "csky-unknown-linux-gnuabiv2", "csky-unknown-linux-gnuabiv2hf"]
 stage = 2
 
 [target.csky-unknown-linux-gnuabiv2]
 # ADJUST THIS PATH TO POINT AT YOUR TOOLCHAIN
 cc = "${TOOLCHAIN_PATH}/bin/csky-linux-gnuabiv2-gcc"
 
+[target.csky-unknown-linux-gnuabiv2hf]
+# ADJUST THIS PATH TO POINT AT YOUR TOOLCHAIN
+cc = "${TOOLCHAIN_PATH}/bin/csky-linux-gnuabiv2-gcc"
+
 ### Build
 
 ```sh

src/tools/build-manifest/src/main.rs

@@ -102,6 +102,7 @@ static TARGETS: &[&str] = &[
     "loongarch64-unknown-none-softfloat",
     "m68k-unknown-linux-gnu",
     "csky-unknown-linux-gnuabiv2",
+    "csky-unknown-linux-gnuabiv2hf",
     "mips-unknown-linux-gnu",
     "mips-unknown-linux-musl",
     "mips64-unknown-linux-gnuabi64",