From: Tsukasa OI <research_tra...@irq.a4lg.com>
After commit c283c4774d1c ("RISC-V: Throw compilation error for unknown
extensions") changed how do we handle unknown extensions, we have no
guarantee that we can share the same architectural string with Binutils
(specifically, the assembler).
To avoid compilation errors on shared Assembler-C/C++ projects, GCC should
support almost all extensions that Binutils support, even if the GCC does
not touch a thing.
This commit adds stub supported standard unprivileged extensions to
riscv_ext_version_table and its implications to riscv_implied_info
(all information is copied from Binutils' bfd/elfxx-riscv.c except not yet
merged 'Zce', 'Zcmp' and 'Zcmt' support).
gcc/ChangeLog:
* common/config/riscv/riscv-common.cc
(riscv_implied_info): Add implications from unprivileged extensions.
(riscv_ext_version_table): Add stub support for all unprivileged
extensions supported by Binutils as well as 'Zce', 'Zcmp', 'Zcmt'.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/predef-31.c: New test for a stub unprivileged
extension 'Zcb' with some implications.
---
gcc/common/config/riscv/riscv-common.cc | 24 +++++++++++++++++
gcc/testsuite/gcc.target/riscv/predef-31.c | 31 ++++++++++++++++++++++
2 files changed, 55 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/riscv/predef-31.c
diff --git a/gcc/common/config/riscv/riscv-common.cc
b/gcc/common/config/riscv/riscv-common.cc
index 0c351105e015..27e9072899bf 100644
--- a/gcc/common/config/riscv/riscv-common.cc
+++ b/gcc/common/config/riscv/riscv-common.cc
@@ -121,6 +121,20 @@ static const riscv_implied_info_t riscv_implied_info[] =
{"zvksg", "zvks"},
{"zvksg", "zvkg"},
+ {"zcb", "zca"},
+ {"zcd", "zca"},
+ {"zcd", "d"},
+ {"zcf", "zca"},
+ {"zcf", "f"},
+ {"zce", "zca"},
+ {"zce", "zcb"},
+ {"zce", "zcmp"},
+ {"zce", "zcmt"},
+ {"zcmp", "zca"},
+ {"zcmt", "zca"},
+ {"zcmt", "zcicsr"},
+
+ {"zfa", "f"},
{"zfh", "zfhmin"},
{"zfhmin", "f"},
{"zvfhmin", "zve32f"},
@@ -197,6 +211,14 @@ static const struct riscv_ext_version
riscv_ext_version_table[] =
{"zawrs", ISA_SPEC_CLASS_NONE, 1, 0},
+ {"zca", ISA_SPEC_CLASS_NONE, 1, 0},
+ {"zcb", ISA_SPEC_CLASS_NONE, 1, 0},
+ {"zce", ISA_SPEC_CLASS_NONE, 1, 0},
+ {"zcmp", ISA_SPEC_CLASS_NONE, 1, 0},
+ {"zcmt", ISA_SPEC_CLASS_NONE, 1, 0},
+ {"zcd", ISA_SPEC_CLASS_NONE, 1, 0},
+ {"zcf", ISA_SPEC_CLASS_NONE, 1, 0},
+
{"zba", ISA_SPEC_CLASS_NONE, 1, 0},
{"zbb", ISA_SPEC_CLASS_NONE, 1, 0},
{"zbc", ISA_SPEC_CLASS_NONE, 1, 0},
@@ -219,6 +241,7 @@ static const struct riscv_ext_version
riscv_ext_version_table[] =
{"zkt", ISA_SPEC_CLASS_NONE, 1, 0},
{"zihintntl", ISA_SPEC_CLASS_NONE, 1, 0},
+ {"zihintpause", ISA_SPEC_CLASS_NONE, 2, 0},
{"zicboz",ISA_SPEC_CLASS_NONE, 1, 0},
{"zicbom",ISA_SPEC_CLASS_NONE, 1, 0},
@@ -265,6 +288,7 @@ static const struct riscv_ext_version
riscv_ext_version_table[] =
{"zvl32768b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl65536b", ISA_SPEC_CLASS_NONE, 1, 0},
+ {"zfa", ISA_SPEC_CLASS_NONE, 0, 1},
{"zfh", ISA_SPEC_CLASS_NONE, 1, 0},
{"zfhmin", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvfhmin", ISA_SPEC_CLASS_NONE, 1, 0},
diff --git a/gcc/testsuite/gcc.target/riscv/predef-31.c
b/gcc/testsuite/gcc.target/riscv/predef-31.c
new file mode 100644
index 000000000000..4ea11442f995
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/predef-31.c
@@ -0,0 +1,31 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64i_zcb -mabi=lp64 -mcmodel=medlow
-misa-spec=20191213" } */
+
+int main () {
+
+#ifndef __riscv_arch_test
+#error "__riscv_arch_test"
+#endif
+
+#if __riscv_xlen != 64
+#error "__riscv_xlen"
+#endif
+
+#if !defined(__riscv_i) || (__riscv_i != (2 * 1000 * 1000 + 1 * 1000))
+#error "__riscv_i"
+#endif
+
+#if defined(__riscv_e)
+#error "__riscv_e"
+#endif
+
+#if !defined(__riscv_zca)
+#error "__riscv_zca"
+#endif
+
+#if !defined(__riscv_zcb)
+#error "__riscv_zcb"
+#endif
+
+ return 0;
+}
--
2.41.0
