RISC-V: Support Smrnmi extension.

Support the Smrnmi extension, which provides new CSRs
for Machine mode Non-Maskable Interrupts.

gcc/ChangeLog:

	* config/riscv/riscv-ext.def: New extension definition.
	* config/riscv/riscv-ext.opt: New extension mask.
	* doc/riscv-ext.texi: Document the new extension.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/arch-smrnmi.c: New test.

Signed-off-by: Jiawei <jiawei@iscas.ac.cn>

diff --git a/gcc/config/riscv/riscv-ext.def b/gcc/config/riscv/riscv-ext.def
index 6c122c3987b08618f778621e5348e967ed154e92..98e7b82c8d17cb289a0ac6a0a0e00412fa63fd74 100644 (file)
--- a/gcc/config/riscv/riscv-ext.def
+++ b/gcc/config/riscv/riscv-ext.def
@@ -1753,6 +1753,19 @@ DEFINE_RISCV_EXT(
   /* BITMASK_BIT_POSITION*/ BITMASK_NOT_YET_ALLOCATED,
   /* EXTRA_EXTENSION_FLAGS */ 0)
 
+DEFINE_RISCV_EXT(
+  /* NAME */ smrnmi,
+  /* UPPERCASE_NAME */ SMRNMI,
+  /* FULL_NAME */ "Resumable non-maskable interrupts",
+  /* DESC */ "",
+  /* URL */ ,
+  /* DEP_EXTS */ ({"zicsr"}),
+  /* SUPPORTED_VERSIONS */ ({{1, 0}}),
+  /* FLAG_GROUP */ sm,
+  /* BITMASK_GROUP_ID */ BITMASK_NOT_YET_ALLOCATED,
+  /* BITMASK_BIT_POSITION*/ BITMASK_NOT_YET_ALLOCATED,
+  /* EXTRA_EXTENSION_FLAGS */ 0)
+
 DEFINE_RISCV_EXT(
   /* NAME */ smstateen,
   /* UPPERCASE_NAME */ SMSTATEEN,

diff --git a/gcc/config/riscv/riscv-ext.opt b/gcc/config/riscv/riscv-ext.opt
index 725dc8793494f20ceacfa9e66872ad7acee2725a..73868798db680d78802b0b7624e6006500a1a756 100644 (file)
--- a/gcc/config/riscv/riscv-ext.opt
+++ b/gcc/config/riscv/riscv-ext.opt
@@ -347,6 +347,8 @@ Mask(SMMPM) Var(riscv_sm_subext)
 
 Mask(SMNPM) Var(riscv_sm_subext)
 
+Mask(SMRNMI) Var(riscv_sm_subext)
+
 Mask(SMSTATEEN) Var(riscv_sm_subext)
 
 Mask(SMDBLTRP) Var(riscv_sm_subext)

diff --git a/gcc/doc/riscv-ext.texi b/gcc/doc/riscv-ext.texi
index ca7414e0c7a00cc7c9a8682684e9c6d40f2a40a2..2d2631e726dcea9137f32ba3ea20d2d662433dc2 100644 (file)
--- a/gcc/doc/riscv-ext.texi
+++ b/gcc/doc/riscv-ext.texi
@@ -518,6 +518,10 @@
 @tab 1.0
 @tab smnpm extension
 
+@item smrnmi
+@tab 1.0
+@tab Resumable Non-Maskable Interrupts
+
 @item smstateen
 @tab 1.0
 @tab State enable extension

diff --git a/gcc/testsuite/gcc.target/riscv/arch-smrnmi.c b/gcc/testsuite/gcc.target/riscv/arch-smrnmi.c
new file mode 100644 (file)
index 0000000..8e62540
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/arch-smrnmi.c
@@ -0,0 +1,5 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64i_smrnmi -mabi=lp64" } */
+int foo()
+{
+}