Require Vivado 2020.2
Switch to Vivado 2020.2 as minimum requirement. This version fixes a
critical synthesis mismatch bug, as discussed in more detail at
https://forums.xilinx.com/t5/Synthesis/Simulation-Synthesis-Mismatch-with-Vivado-2018-3/m-p/1065923#M33849.
We did work around this Vivado bug in the past (see #1355, #1408),
but can avoid these workarounds now, as they collide slightly with
syntax that is works better for Verilator (#6639).
Signed-off-by: Philipp Wagner <phw@lowrisc.org>
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 4bb6f6c..9a3f9b0 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -19,7 +19,7 @@
TOOLCHAIN_VERSION: 20210412-1
# This controls where builds happen, and gets picked up by build_consts.sh.
BUILD_ROOT: $(Build.ArtifactStagingDirectory)
- VIVADO_VERSION: "2020.1"
+ VIVADO_VERSION: "2020.2"
trigger:
batch: true
diff --git a/doc/ug/install_instructions/index.md b/doc/ug/install_instructions/index.md
index 6bcdf24..9d70f25 100644
--- a/doc/ug/install_instructions/index.md
+++ b/doc/ug/install_instructions/index.md
@@ -65,6 +65,7 @@
* [Verilator](https://verilator.org) {{< tool_version "verilator" >}}
* Xilinx Vivado {{< tool_version "vivado" >}}
+ (Do not use versions earlier than 2020.2 due to a [critical synthesis bug](https://forums.xilinx.com/t5/Synthesis/Simulation-Synthesis-Mismatch-with-Vivado-2018-3/m-p/1065923#M33849).)
* Synopsys VCS
* Cadence Xcelium
* Cadence JasperGold
diff --git a/tool_requirements.py b/tool_requirements.py
index 1943533..9036fdb 100644
--- a/tool_requirements.py
+++ b/tool_requirements.py
@@ -42,7 +42,7 @@
'as_needed': True
},
'vivado': {
- 'min_version': '2020.1',
+ 'min_version': '2020.2',
'as_needed': True
},
}
