[gcc r14-6104] RISC-V: Add sifive-x280 to -mcpu

[gcc r14-6104] RISC-V: Add sifive-x280 to -mcpu

[Kito Cheng]

https://gcc.gnu.org/g:ba94969bad24d57895b02cc2d4663462f8fb5bc5

commit r14-6104-gba94969bad24d57895b02cc2d4663462f8fb5bc5
Author: Kito Cheng <kito.cheng@sifive.com>
Date:   Mon Dec 4 14:17:52 2023 +0800

    RISC-V: Add sifive-x280 to -mcpu
    
    x280 is one of SiFive core, and it release for a while, also
    upstream LLVM already support that.
    
    [1] https://www.sifive.com/cores/intelligence-x280
    
    gcc/ChangeLog:
    
            * config/riscv/riscv-cores.def: Add sifive-x280.
            * doc/invoke.texi (RISC-V Options): Add sifive-x280
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/riscv/mcpu-sifive-x280.c: New test.

Diff:
---
 gcc/config/riscv/riscv-cores.def                  |  1 +
 gcc/doc/invoke.texi                               |  2 +-
 gcc/testsuite/gcc.target/riscv/mcpu-sifive-x280.c | 20 ++++++++++++++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/gcc/config/riscv/riscv-cores.def b/gcc/config/riscv/riscv-cores.def
index 91deabb6079..34df59e8d61 100644
--- a/gcc/config/riscv/riscv-cores.def
+++ b/gcc/config/riscv/riscv-cores.def
@@ -73,6 +73,7 @@ RISCV_CORE("sifive-s76",      "rv64imafdc", "sifive-7-series")
 
 RISCV_CORE("sifive-u54",      "rv64imafdc", "sifive-5-series")
 RISCV_CORE("sifive-u74",      "rv64imafdc", "sifive-7-series")
+RISCV_CORE("sifive-x280",     "rv64imafdcv_zfh_zba_zbb_zvfh_zvl512b", "sifive-7-series")
 
 RISCV_CORE("thead-c906",      "rv64imafdc_xtheadba_xtheadbb_xtheadbs_xtheadcmo_"
 			      "xtheadcondmov_xtheadfmemidx_xtheadmac_"
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 2fab4c5d71f..6fe63b5f999 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -29776,7 +29776,7 @@ by particular CPU name.
 Permissible values for this option are: @samp{sifive-e20}, @samp{sifive-e21},
 @samp{sifive-e24}, @samp{sifive-e31}, @samp{sifive-e34}, @samp{sifive-e76},
 @samp{sifive-s21}, @samp{sifive-s51}, @samp{sifive-s54}, @samp{sifive-s76},
-@samp{sifive-u54}, and @samp{sifive-u74}.
+@samp{sifive-u54}, @samp{sifive-u74}, and @samp{sifive-x280}.
 
 @opindex mtune
 @item -mtune=@var{processor-string}
diff --git a/gcc/testsuite/gcc.target/riscv/mcpu-sifive-x280.c b/gcc/testsuite/gcc.target/riscv/mcpu-sifive-x280.c
new file mode 100644
index 00000000000..be6e13f810b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/mcpu-sifive-x280.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-skip-if "-march given" { *-*-* } { "-march=*" } } */
+/* { dg-options "-mcpu=sifive-x280 -mabi=lp64" } */
+/* SiFive x280 => rv64imafdcv_zfh_zba_zbb_zvfh_zvl512b */
+
+#if !((__riscv_xlen == 64)		\
+      && !defined(__riscv_32e)		\
+      && (__riscv_flen == 64)		\
+      && defined(__riscv_c)		\
+      && defined(__riscv_zfh)		\
+      && defined(__riscv_zvfh)		\
+      && defined(__riscv_zvl512b)	\
+      && defined(__riscv_v))
+#error "unexpected arch"
+#endif
+
+int main()
+{
+  return 0;
+}