[clang] [RISCV] Update Zfa extension version to 1.0 (PR #67964)
Alex Bradbury via cfe-commits
cfe-commits at lists.llvm.org
Tue Oct 3 07:21:38 PDT 2023
https://github.com/asb updated https://github.com/llvm/llvm-project/pull/67964
>From 79ab61e07a01e503f22e717c4b0e64b7741c59a0 Mon Sep 17 00:00:00 2001
From: Alex Bradbury <asb at igalia.com>
Date: Mon, 2 Oct 2023 11:06:44 +0100
Subject: [PATCH 1/3] [RISCV] Update Zfa extension version to 1.0
The Zfa specification was recently ratified
<https://wiki.riscv.org/display/HOME/Recently+Ratified+Extensions>. This
commit bumps the version to 1.0, but leaves it as an experimental
extension (to be done in a follow-on patch), so reviews can focus on
confirming there haven't been spec changes we have missed (which as
noted below, is more difficult than usual).
Because the development of the Zfa spec overlapped with the transition
of riscv-isa-manual from LaTeX to AsciiDoc, it's more difficult than
usual to confirm version changes. The linked PDF in RISCVUsage is for
some reason a 404. Key commit histories to review are:
* Changes to zfa.adoc on the main branch
<https://github.com/riscv/riscv-isa-manual/commits/main/src/zfa.adoc>
* Changes to zfa.tex on the now defunct latex branch
<https://github.com/riscv/riscv-isa-manual/commits/latex/src/zfa.tex>
>From reviewing these, I believe there have been no changes to the spec
since version 0.1/0.2 (sadly the AsciiDoc and LaTeX versions of the spec
are inconsistent about version numbering).
There hasn't been a GitHub release of the spec since Zfa was ratified
(though I've requested one
<https://github.com/riscv/riscv-isa-manual/issues/1137>), so RISCVUsage
is updated to link to the current Zfa.adoc. I don't think we need to
block on this, as we expect to shortly move Zfa to non-experimental, at
which point we don't link to individual spec documents in RISCVUsage.
---
clang/test/Driver/riscv-arch.c | 4 ++--
clang/test/Preprocessor/riscv-target-features.c | 6 +++---
llvm/docs/RISCVUsage.rst | 2 +-
llvm/docs/ReleaseNotes.rst | 1 +
llvm/lib/Support/RISCVISAInfo.cpp | 2 +-
llvm/test/CodeGen/RISCV/attributes.ll | 4 ++--
llvm/test/MC/RISCV/attribute-arch.s | 4 ++--
7 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/clang/test/Driver/riscv-arch.c b/clang/test/Driver/riscv-arch.c
index 92a6a59cba2317c..4896c0184507dd4 100644
--- a/clang/test/Driver/riscv-arch.c
+++ b/clang/test/Driver/riscv-arch.c
@@ -385,9 +385,9 @@
// RUN: not %clang --target=riscv32-unknown-elf -march=rv32izfa0p1 -menable-experimental-extensions -### %s \
// RUN: -fsyntax-only 2>&1 | FileCheck -check-prefix=RV32-EXPERIMENTAL-BADVERS %s
// RV32-EXPERIMENTAL-BADVERS: error: invalid arch name 'rv32izfa0p1'
-// RV32-EXPERIMENTAL-BADVERS: unsupported version number 0.1 for experimental extension 'zfa' (this compiler supports 0.2)
+// RV32-EXPERIMENTAL-BADVERS: unsupported version number 0.1 for experimental extension 'zfa' (this compiler supports 1.0)
-// RUN: %clang --target=riscv32-unknown-elf -march=rv32izfa0p2 -menable-experimental-extensions -### %s \
+// RUN: %clang --target=riscv32-unknown-elf -march=rv32izfa1p0 -menable-experimental-extensions -### %s \
// RUN: -fsyntax-only 2>&1 | FileCheck -check-prefix=RV32-EXPERIMENTAL-GOODVERS %s
// RV32-EXPERIMENTAL-GOODVERS: "-target-feature" "+experimental-zfa"
diff --git a/clang/test/Preprocessor/riscv-target-features.c b/clang/test/Preprocessor/riscv-target-features.c
index 4dd83cfa0620b90..4b9ec423200017f 100644
--- a/clang/test/Preprocessor/riscv-target-features.c
+++ b/clang/test/Preprocessor/riscv-target-features.c
@@ -1002,12 +1002,12 @@
// CHECK-ZACAS-EXT: __riscv_zacas 1000000{{$}}
// RUN: %clang --target=riscv32-unknown-linux-gnu -menable-experimental-extensions \
-// RUN: -march=rv32izfa0p2 -x c -E -dM %s \
+// RUN: -march=rv32izfa1p0 -x c -E -dM %s \
// RUN: -o - | FileCheck --check-prefix=CHECK-ZFA-EXT %s
// RUN: %clang --target=riscv64-unknown-linux-gnu -menable-experimental-extensions \
-// RUN: -march=rv64izfa0p2 -x c -E -dM %s \
+// RUN: -march=rv64izfa1p0 -x c -E -dM %s \
// RUN: -o - | FileCheck --check-prefix=CHECK-ZFA-EXT %s
-// CHECK-ZFA-EXT: __riscv_zfa 2000{{$}}
+// CHECK-ZFA-EXT: __riscv_zfa 1000000{{$}}
// RUN: %clang --target=riscv32 -menable-experimental-extensions \
// RUN: -march=rv32izfbfmin0p8 -x c -E -dM %s \
diff --git a/llvm/docs/RISCVUsage.rst b/llvm/docs/RISCVUsage.rst
index 8d12d58738c609a..647c4c49500c161 100644
--- a/llvm/docs/RISCVUsage.rst
+++ b/llvm/docs/RISCVUsage.rst
@@ -197,7 +197,7 @@ The primary goal of experimental support is to assist in the process of ratifica
LLVM implements the `1.0-rc1 draft specification <https://github.com/riscv/riscv-zacas/releases/tag/v1.0-rc1>`_.
``experimental-zfa``
- LLVM implements the `0.2 draft specification <https://github.com/riscv/riscv-isa-manual/releases/download/draft-20230131-c0b298a/zfa-20230414.pdf>`__.
+ LLVM implements the `1.0 specification <https://github.com/riscv/riscv-isa-manual/blob/056b6ff467c7a9cf86ba0cef34d3b6a65740cc64/src/zfa.adoc>`__.
``experimental-zfbfmin``, ``experimental-zvfbfmin``, ``experimental-zvfbfwma``
LLVM implements assembler support for the `0.8.0 draft specification <https://github.com/riscv/riscv-bfloat16/releases/tag/20230629>`_.
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index 660bb4e70a5a707..f68a1cae73412e7 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -109,6 +109,7 @@ Changes to the PowerPC Backend
Changes to the RISC-V Backend
-----------------------------
+* The Zfa extension version was upgraded to 1.0.
* Zihintntl extension version was upgraded to 1.0 and is no longer experimental.
Changes to the WebAssembly Backend
diff --git a/llvm/lib/Support/RISCVISAInfo.cpp b/llvm/lib/Support/RISCVISAInfo.cpp
index c4f50b7773b75df..9c7670d35a7c899 100644
--- a/llvm/lib/Support/RISCVISAInfo.cpp
+++ b/llvm/lib/Support/RISCVISAInfo.cpp
@@ -166,7 +166,7 @@ static const RISCVSupportedExtension SupportedExperimentalExtensions[] = {
{"zacas", RISCVExtensionVersion{1, 0}},
- {"zfa", RISCVExtensionVersion{0, 2}},
+ {"zfa", RISCVExtensionVersion{1, 0}},
{"zfbfmin", RISCVExtensionVersion{0, 8}},
{"zicfilp", RISCVExtensionVersion{0, 2}},
diff --git a/llvm/test/CodeGen/RISCV/attributes.ll b/llvm/test/CodeGen/RISCV/attributes.ll
index 29eaaee57868a83..5c8812cd55a5064 100644
--- a/llvm/test/CodeGen/RISCV/attributes.ll
+++ b/llvm/test/CodeGen/RISCV/attributes.ll
@@ -243,7 +243,7 @@
; RV32ZIFENCEI: .attribute 5, "rv32i2p1_zifencei2p0"
; RV32ZICNTR: .attribute 5, "rv32i2p1_zicntr2p0_zicsr2p0"
; RV32ZIHPM: .attribute 5, "rv32i2p1_zicsr2p0_zihpm2p0"
-; RV32ZFA: .attribute 5, "rv32i2p1_f2p2_zicsr2p0_zfa0p2"
+; RV32ZFA: .attribute 5, "rv32i2p1_f2p2_zicsr2p0_zfa1p0"
; RV32ZVBB: .attribute 5, "rv32i2p1_zicsr2p0_zvbb1p0_zve32x1p0_zvkb1p0_zvl32b1p0"
; RV32ZVBC: .attribute 5, "rv32i2p1_zicsr2p0_zvbc1p0_zve32x1p0_zve64x1p0_zvl32b1p0_zvl64b1p0"
; RV32ZVKB: .attribute 5, "rv32i2p1_zicsr2p0_zve32x1p0_zvkb1p0_zvl32b1p0"
@@ -332,7 +332,7 @@
; RV64ZIFENCEI: .attribute 5, "rv64i2p1_zifencei2p0"
; RV64ZICNTR: .attribute 5, "rv64i2p1_zicntr2p0_zicsr2p0"
; RV64ZIHPM: .attribute 5, "rv64i2p1_zicsr2p0_zihpm2p0"
-; RV64ZFA: .attribute 5, "rv64i2p1_f2p2_zicsr2p0_zfa0p2"
+; RV64ZFA: .attribute 5, "rv64i2p1_f2p2_zicsr2p0_zfa1p0"
; RV64ZVBB: .attribute 5, "rv64i2p1_zicsr2p0_zvbb1p0_zve32x1p0_zvkb1p0_zvl32b1p0"
; RV64ZVBC: .attribute 5, "rv64i2p1_zicsr2p0_zvbc1p0_zve32x1p0_zve64x1p0_zvl32b1p0_zvl64b1p0"
; RV64ZVKB: .attribute 5, "rv64i2p1_zicsr2p0_zve32x1p0_zvkb1p0_zvl32b1p0"
diff --git a/llvm/test/MC/RISCV/attribute-arch.s b/llvm/test/MC/RISCV/attribute-arch.s
index bf40eda456edf13..12c494dc896a0ad 100644
--- a/llvm/test/MC/RISCV/attribute-arch.s
+++ b/llvm/test/MC/RISCV/attribute-arch.s
@@ -261,8 +261,8 @@
.attribute arch, "rv32izifencei2p0"
# CHECK: attribute 5, "rv32i2p1_zifencei2p0"
-.attribute arch, "rv32izfa0p2"
-# CHECK: attribute 5, "rv32i2p1_f2p2_zicsr2p0_zfa0p2"
+.attribute arch, "rv32izfa1p0"
+# CHECK: attribute 5, "rv32i2p1_f2p2_zicsr2p0_zfa1p0"
.attribute arch, "rv32izicond1p0"
# CHECK: attribute 5, "rv32i2p1_zicond1p0"
>From 60d063fefe3454d321a1ff87f632ab5d7e0df488 Mon Sep 17 00:00:00 2001
From: Alex Bradbury <asb at igalia.com>
Date: Mon, 2 Oct 2023 19:48:45 +0100
Subject: [PATCH 2/3] Update zfa spec link to new riscv-isa-manual GH release
---
llvm/docs/RISCVUsage.rst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/llvm/docs/RISCVUsage.rst b/llvm/docs/RISCVUsage.rst
index 647c4c49500c161..23edaa6f29941de 100644
--- a/llvm/docs/RISCVUsage.rst
+++ b/llvm/docs/RISCVUsage.rst
@@ -197,7 +197,7 @@ The primary goal of experimental support is to assist in the process of ratifica
LLVM implements the `1.0-rc1 draft specification <https://github.com/riscv/riscv-zacas/releases/tag/v1.0-rc1>`_.
``experimental-zfa``
- LLVM implements the `1.0 specification <https://github.com/riscv/riscv-isa-manual/blob/056b6ff467c7a9cf86ba0cef34d3b6a65740cc64/src/zfa.adoc>`__.
+ LLVM implements the `1.0 specification <https://github.com/riscv/riscv-isa-manual/releases/tag/riscv-isa-release-056b6ff-2023-10-02>`__.
``experimental-zfbfmin``, ``experimental-zvfbfmin``, ``experimental-zvfbfwma``
LLVM implements assembler support for the `0.8.0 draft specification <https://github.com/riscv/riscv-bfloat16/releases/tag/20230629>`_.
>From f21c479811de5cb476ef8d2abe0265b1bf8ea24f Mon Sep 17 00:00:00 2001
From: Alex Bradbury <asb at igalia.com>
Date: Tue, 3 Oct 2023 15:20:51 +0100
Subject: [PATCH 3/3] Fix missed change in RISCVISAInfoTest.cpp unit test
---
llvm/unittests/Support/RISCVISAInfoTest.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/llvm/unittests/Support/RISCVISAInfoTest.cpp b/llvm/unittests/Support/RISCVISAInfoTest.cpp
index e893e0d6f91685e..4eeaab727c5c01b 100644
--- a/llvm/unittests/Support/RISCVISAInfoTest.cpp
+++ b/llvm/unittests/Support/RISCVISAInfoTest.cpp
@@ -729,7 +729,7 @@ Experimental extensions
zicfilp 0.2 This is a long dummy description
zicond 1.0
zacas 1.0
- zfa 0.2
+ zfa 1.0
zfbfmin 0.8
ztso 0.1
zvbb 1.0
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