[PATCH] RISC-V: Add vxsat as a register

[Palmer Dabbelt <palmer@rivosinc.com>]

We aren't doing anything with vxsat right now, but I'd like to add it as
an accepted register to the clobber list.  If we get this into GCC-14
then we'll avoid some preprocessor-based twiddling if we ever start
using vxsat in the future.

gcc/ChangeLog:

	* config/riscv/riscv.h (REGISTER_NAMES): Add vxsat.
---
IIUC we aren't using these N/A regnos for anything, they're just there to pad
out the types.  So I think this is safe, but Juzhe would likely know best here.

See
https://inbox.sourceware.org/libc-alpha/20240327193601.28903-2-palmer@rivosinc.com/
a use of this.
---
 gcc/config/riscv/riscv.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/riscv/riscv.h b/gcc/config/riscv/riscv.h
index da089a03e9d..d5779512994 100644
--- a/gcc/config/riscv/riscv.h
+++ b/gcc/config/riscv/riscv.h
@@ -933,7 +933,7 @@ extern enum riscv_cc get_riscv_cc (const rtx use);
   "fs0", "fs1", "fa0", "fa1", "fa2", "fa3", "fa4", "fa5",	\
   "fa6", "fa7", "fs2", "fs3", "fs4", "fs5", "fs6", "fs7",	\
   "fs8", "fs9", "fs10","fs11","ft8", "ft9", "ft10","ft11",	\
-  "arg", "frame", "vl", "vtype", "vxrm", "frm", "N/A", "N/A",   \
+  "arg", "frame", "vl", "vtype", "vxrm", "frm", "vxsat", "N/A", \
   "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A",	\
   "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A",	\
   "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A",	\
-- 
2.44.0