diff options
Diffstat (limited to 'library/stdarch/crates/std_detect/src')
| -rw-r--r-- | library/stdarch/crates/std_detect/src/detect/arch/riscv.rs | 204 |
1 files changed, 78 insertions, 126 deletions
diff --git a/library/stdarch/crates/std_detect/src/detect/arch/riscv.rs b/library/stdarch/crates/std_detect/src/detect/arch/riscv.rs index 40e758d44f1..63790537f85 100644 --- a/library/stdarch/crates/std_detect/src/detect/arch/riscv.rs +++ b/library/stdarch/crates/std_detect/src/detect/arch/riscv.rs @@ -22,133 +22,87 @@ features! { /// /// [ISA manual]: https://riscv.org/specifications/ratified/ /// - /// # Platform-specific/agnostic Behavior and Availability - /// - /// Runtime detection depends on the platform-specific feature detection - /// facility and its availability per feature is - /// highly platform/version-specific. - /// - /// Still, a best-effort attempt is performed to enable subset/dependent - /// features if a superset feature is enabled regardless of the platform. - /// For instance, if the A extension (`"a"`) is enabled, its subsets (the - /// Zalrsc and Zaamo extensions; `"zalrsc"` and `"zaamo"`) are also enabled. - /// Likewise, if the F extension (`"f"`) is enabled, one of its dependencies - /// (the Zicsr extension `"zicsr"`) is also enabled. - /// /// # Unprivileged Specification /// - /// The supported ratified RISC-V instruction sets are as follows (OS - /// columns denote runtime feature detection support with or without the - /// minimum supported version): - /// - /// | Literal | Base | Linux | - /// |:---------- |:------- |:---------- | - /// | `"rv32e"` | RV32E | No | - /// | `"rv32i"` | RV32I | Yes [^ima] | - /// | `"rv64i"` | RV64I | Yes [^ima] | - /// - /// | Literal | Extension | Linux | - /// |:--------------- |:----------- |:------------------ | - /// | `"a"` | A | Yes [^ima] | - /// | `"b"` | B | 6.5 | - /// | `"c"` | C | Yes | - /// | `"d"` | D | Yes | - /// | `"f"` | F | Yes | - /// | `"m"` | M | Yes [^ima] | - /// | `"q"` | Q | No | - /// | `"v"` | V | 6.5 | - /// | `"zaamo"` | Zaamo | No [^ima] [^dep] | - /// | `"zacas"` | Zacas | 6.8 | - /// | `"zalrsc"` | Zalrsc | No [^ima] [^dep] | - /// | `"zawrs"` | Zawrs | 6.11 | - /// | `"zba"` | Zba | 6.5 | - /// | `"zbb"` | Zbb | 6.5 | - /// | `"zbc"` | Zbc | 6.8 | - /// | `"zbkb"` | Zbkb | 6.8 | - /// | `"zbkc"` | Zbkc | 6.8 | - /// | `"zbkx"` | Zbkx | 6.8 | - /// | `"zbs"` | Zbs | 6.5 | - /// | `"zca"` | Zca | 6.11 [^dep] | - /// | `"zcb"` | Zcb | 6.11 [^dep] | - /// | `"zcd"` | Zcd | 6.11 [^dep] | - /// | `"zcf"` | Zcf | 6.11 [^dep] | - /// | `"zcmop"` | Zcmop | 6.11 | - /// | `"zdinx"` | Zdinx | No | - /// | `"zfa"` | Zfa | 6.8 | - /// | `"zfh"` | Zfh | 6.8 | - /// | `"zfhmin"` | Zfhmin | 6.8 | - /// | `"zfinx"` | Zfinx | No | - /// | `"zhinx"` | Zhinx | No | - /// | `"zhinxmin"` | Zhinxmin | No | - /// | `"zicboz"` | Zicboz | 6.7 | - /// | `"zicntr"` | Zicntr | No [^ima-cntr] [^cntr] | - /// | `"zicond"` | Zicond | 6.8 | - /// | `"zicsr"` | Zicsr | No [^ima] [^dep] | - /// | `"zifencei"` | Zifencei | No [^ima] | - /// | `"zihintntl"` | Zihintntl | 6.8 | - /// | `"zihintpause"` | Zihintpause | 6.10 | - /// | `"zihpm"` | Zihpm | No | - /// | `"zimop"` | Zimop | 6.11 | - /// | `"zk"` | Zk | No [^zkr] | - /// | `"zkn"` | Zkn | 6.8 | - /// | `"zknd"` | Zknd | 6.8 | - /// | `"zkne"` | Zkne | 6.8 | - /// | `"zknh"` | Zknh | 6.8 | - /// | `"zkr"` | Zkr | No [^zkr] | - /// | `"zks"` | Zks | 6.8 | - /// | `"zksed"` | Zksed | 6.8 | - /// | `"zksh"` | Zksh | 6.8 | - /// | `"zkt"` | Zkt | 6.8 | - /// | `"ztso"` | Ztso | 6.8 | - /// | `"zvbb"` | Zvbb | 6.8 | - /// | `"zvbc"` | Zvbc | 6.8 | - /// | `"zve32f"` | Zve32f | 6.11 [^dep] | - /// | `"zve32x"` | Zve32x | 6.11 [^dep] | - /// | `"zve64d"` | Zve64d | 6.11 [^dep] | - /// | `"zve64f"` | Zve64f | 6.11 [^dep] | - /// | `"zve64x"` | Zve64x | 6.11 [^dep] | - /// | `"zvfh"` | Zvfh | 6.8 | - /// | `"zvfhmin"` | Zvfhmin | 6.8 | - /// | `"zvkb"` | Zvkb | 6.8 | - /// | `"zvkg"` | Zvkg | 6.8 | - /// | `"zvkn"` | Zvkn | 6.8 | - /// | `"zvknc"` | Zvknc | 6.8 | - /// | `"zvkned"` | Zvkned | 6.8 | - /// | `"zvkng"` | Zvkng | 6.8 | - /// | `"zvknha"` | Zvknha | 6.8 | - /// | `"zvknhb"` | Zvknhb | 6.8 | - /// | `"zvks"` | Zvks | 6.8 | - /// | `"zvksc"` | Zvksc | 6.8 | - /// | `"zvksed"` | Zvksed | 6.8 | - /// | `"zvksg"` | Zvksg | 6.8 | - /// | `"zvksh"` | Zvksh | 6.8 | - /// | `"zvkt"` | Zvkt | 6.8 | - /// - /// [^ima]: Or enabled when the IMA base behavior is enabled on the Linux - /// kernel version 6.4 or later (for bases, the only matching one -- either - /// `"rv32i"` or `"rv64i"` -- is enabled). - /// - /// [^ima-cntr]: If the IMA base behavior is enabled on the Linux kernel - /// version 6.4 or later, the Zicntr extension should be also present. - /// However, it seems that Linux does not guarantee its existence. - /// - /// [^cntr]: Even if this extension is available, it does not necessarily - /// mean all performance counters are accessible. - /// For instance, the Linux kernel version 6.6 or later prohibits accesses - /// to performance counters other than `time` (wall-clock) by default. - /// Also beware that, even if performance counters like `cycle` and - /// `instret` are accessible, their value can be unreliable (e.g. returning - /// the constant value) under certain circumstances. - /// - /// [^dep]: Or enabled as a dependency of another extension (a superset) - /// even if runtime detection of this feature itself is not supported (as - /// long as the runtime detection of the superset is supported). + /// The supported ratified RISC-V instruction sets are as follows: /// - /// [^zkr]: Linux does not report existence of this extension even if - /// supported by the hardware mainly because the `seed` CSR is normally - /// inaccessible from the user mode. - /// For the Zk extension features except this CSR, check existence of both - /// `"zkn"` and `"zkt"` features instead. + /// * RV32E: `"rv32e"` + /// * RV32I: `"rv32i"` + /// * RV64I: `"rv64i"` + /// * A: `"a"` + /// * Zaamo: `"zaamo"` + /// * Zalrsc: `"zalrsc"` + /// * B: `"b"` + /// * Zba: `"zba"` + /// * Zbb: `"zbb"` + /// * Zbs: `"zbs"` + /// * C: `"c"` + /// * Zca: `"zca"` + /// * Zcd: `"zcd"` (if D is enabled) + /// * Zcf: `"zcf"` (if F is enabled on RV32) + /// * D: `"d"` + /// * F: `"f"` + /// * M: `"m"` + /// * Q: `"q"` + /// * V: `"v"` + /// * Zve32x: `"zve32x"` + /// * Zve32f: `"zve32f"` + /// * Zve64x: `"zve64x"` + /// * Zve64f: `"zve64f"` + /// * Zve64d: `"zve64d"` + /// * Zicboz: `"zicboz"` + /// * Zicntr: `"zicntr"` + /// * Zicond: `"zicond"` + /// * Zicsr: `"zicsr"` + /// * Zifencei: `"zifencei"` + /// * Zihintntl: `"zihintntl"` + /// * Zihintpause: `"zihintpause"` + /// * Zihpm: `"zihpm"` + /// * Zimop: `"zimop"` + /// * Zacas: `"zacas"` + /// * Zawrs: `"zawrs"` + /// * Zfa: `"zfa"` + /// * Zfh: `"zfh"` + /// * Zfhmin: `"zfhmin"` + /// * Zfinx: `"zfinx"` + /// * Zdinx: `"zdinx"` + /// * Zhinx: `"zhinx"` + /// * Zhinxmin: `"zhinxmin"` + /// * Zcb: `"zcb"` + /// * Zcmop: `"zcmop"` + /// * Zbc: `"zbc"` + /// * Zbkb: `"zbkb"` + /// * Zbkc: `"zbkc"` + /// * Zbkx: `"zbkx"` + /// * Zk: `"zk"` + /// * Zkn: `"zkn"` + /// * Zknd: `"zknd"` + /// * Zkne: `"zkne"` + /// * Zknh: `"zknh"` + /// * Zkr: `"zkr"` + /// * Zks: `"zks"` + /// * Zksed: `"zksed"` + /// * Zksh: `"zksh"` + /// * Zkt: `"zkt"` + /// * Zvbb: `"zvbb"` + /// * Zvbc: `"zvbc"` + /// * Zvfh: `"zvfh"` + /// * Zvfhmin: `"zvfhmin"` + /// * Zvkb: `"zvkb"` + /// * Zvkg: `"zvkg"` + /// * Zvkn: `"zvkn"` + /// * Zvkned: `"zvkned"` + /// * Zvknha: `"zvknha"` + /// * Zvknhb: `"zvknhb"` + /// * Zvknc: `"zvknc"` + /// * Zvkng: `"zvkng"` + /// * Zvks: `"zvks"` + /// * Zvksed: `"zvksed"` + /// * Zvksh: `"zvksh"` + /// * Zvksc: `"zvksc"` + /// * Zvksg: `"zvksg"` + /// * Zvkt: `"zvkt"` + /// * Ztso: `"ztso"` /// /// There's also bases and extensions marked as standard instruction set, /// but they are in frozen or draft state. These instruction sets are also @@ -168,9 +122,7 @@ features! { /// corresponding unaligned memory access is reasonably fast. /// /// * `"unaligned-scalar-mem"` - /// * Runtime detection requires Linux kernel version 6.4 or later. /// * `"unaligned-vector-mem"` - /// * Runtime detection requires Linux kernel version 6.13 or later. #[stable(feature = "riscv_ratified", since = "1.78.0")] @FEATURE: #[unstable(feature = "stdarch_riscv_feature_detection", issue = "111192")] rv32i: "rv32i"; |