Rename the 'cretonne' crate to 'cretonne-codegen'.

This fixes the next part of #287.
2018-04-17 08:48:02 -07:00
parent 7767186dd0
commit 24fa169e1f
254 changed files with 265 additions and 264 deletions
--- a/lib/codegen/meta/base/settings.py
+++ b/lib/codegen/meta/base/settings.py
@@ -0,0 +1,100 @@
+"""
+Cretonne shared settings.
+
+This module defines settings relevant for all code generators.
+"""
+from __future__ import absolute_import
+from cdsl.settings import SettingGroup, BoolSetting, EnumSetting, NumSetting
+
+group = SettingGroup('shared')
+
+opt_level = EnumSetting(
+        """
+        Optimization level:
+
+        - default: Very profitable optimizations enabled, none slow.
+        - best: Enable all optimizations
+        - fastest: Optimize for compile time by disabling most optimizations.
+        """,
+        'default', 'best', 'fastest')
+
+enable_verifier = BoolSetting(
+        """
+        Run the Cretonne IR verifier at strategic times during compilation.
+
+        This makes compilation slower but catches many bugs. The verifier is
+        disabled by default, except when reading Cretonne IR from a text file.
+        """,
+        default=True)
+
+is_64bit = BoolSetting("Enable 64-bit code generation")
+
+is_pic = BoolSetting("Enable Position-Independent Code generation")
+
+return_at_end = BoolSetting(
+        """
+        Generate functions with at most a single return instruction at the
+        end of the function.
+
+        This guarantees that functions do not have any internal return
+        instructions. Either they never return, or they have a single return
+        instruction at the end.
+        """)
+
+avoid_div_traps = BoolSetting(
+        """
+        Generate explicit checks around native division instructions to avoid
+        their trapping.
+
+        This is primarily used by SpiderMonkey which doesn't install a signal
+        handler for SIGFPE, but expects a SIGILL trap for division by zero.
+
+        On ISAs like ARM where the native division instructions don't trap,
+        this setting has no effect - explicit checks are always inserted.
+        """)
+
+is_compressed = BoolSetting("Enable compressed instructions")
+
+enable_float = BoolSetting(
+        """
+        Enable the use of floating-point instructions
+
+        Disabling use of floating-point instructions is not yet implemented.
+        """,
+        default=True)
+
+enable_simd = BoolSetting(
+        """Enable the use of SIMD instructions.""",
+        default=True)
+
+enable_atomics = BoolSetting(
+        """Enable the use of atomic instructions""",
+        default=True)
+
+#
+# Settings specific to the `spiderwasm` calling convention.
+#
+spiderwasm_prologue_words = NumSetting(
+        """
+        Number of pointer-sized words pushed by the spiderwasm prologue.
+
+        Functions with the `spiderwasm` calling convention don't generate their
+        own prologue and epilogue. They depend on externally generated code
+        that pushes a fixed number of words in the prologue and restores them
+        in the epilogue.
+
+        This setting configures the number of pointer-sized words pushed on the
+        stack when the Cretonne-generated code is entered. This includes the
+        pushed return address on x86.
+        """)
+
+#
+# BaldrMonkey requires that not-yet-relocated function addresses be encoded
+# as all-ones bitpatterns.
+#
+allones_funcaddrs = BoolSetting(
+        """
+        Emit not-yet-relocated function addresses as all-ones bit patterns.
+        """)
+
+group.close(globals())