moved crates in lib/ to src/, renamed crates, modified some files' text (#660)

moved crates in lib/ to src/, renamed crates, modified some files' text (#660)

cranelift/codegen/meta-python/isa/x86/settings.py

@@ -0,0 +1,54 @@
+"""
+x86 settings.
+"""
+from __future__ import absolute_import
+from cdsl.settings import SettingGroup, BoolSetting, Preset
+from cdsl.predicates import And
+import base.settings as shared
+from .defs import ISA
+
+ISA.settings = SettingGroup('x86', parent=shared.group)
+
+# The has_* settings here correspond to CPUID bits.
+
+# CPUID.01H:ECX
+has_sse3 = BoolSetting("SSE3: CPUID.01H:ECX.SSE3[bit 0]")
+has_ssse3 = BoolSetting("SSSE3: CPUID.01H:ECX.SSSE3[bit 9]")
+has_sse41 = BoolSetting("SSE4.1: CPUID.01H:ECX.SSE4_1[bit 19]")
+has_sse42 = BoolSetting("SSE4.2: CPUID.01H:ECX.SSE4_2[bit 20]")
+has_popcnt = BoolSetting("POPCNT: CPUID.01H:ECX.POPCNT[bit 23]")
+has_avx = BoolSetting("AVX: CPUID.01H:ECX.AVX[bit 28]")
+
+# CPUID.(EAX=07H, ECX=0H):EBX
+has_bmi1 = BoolSetting("BMI1: CPUID.(EAX=07H, ECX=0H):EBX.BMI1[bit 3]")
+has_bmi2 = BoolSetting("BMI2: CPUID.(EAX=07H, ECX=0H):EBX.BMI2[bit 8]")
+
+# CPUID.EAX=80000001H:ECX
+has_lzcnt = BoolSetting("LZCNT: CPUID.EAX=80000001H:ECX.LZCNT[bit 5]")
+
+
+# The use_* settings here are used to determine if a feature can be used.
+
+use_sse41 = And(has_sse41)
+use_sse42 = And(has_sse42, use_sse41)
+use_popcnt = And(has_popcnt, has_sse42)
+use_bmi1 = And(has_bmi1)
+use_lzcnt = And(has_lzcnt)
+
+# Presets corresponding to x86 CPUs.
+
+baseline = Preset()
+
+nehalem = Preset(
+        has_sse3, has_ssse3, has_sse41, has_sse42, has_popcnt)
+haswell = Preset(nehalem, has_bmi1, has_bmi2, has_lzcnt)
+broadwell = Preset(haswell)
+skylake = Preset(broadwell)
+cannonlake = Preset(skylake)
+icelake = Preset(cannonlake)
+
+znver1 = Preset(
+        has_sse3, has_ssse3, has_sse41, has_sse42, has_popcnt,
+        has_bmi1, has_bmi2, has_lzcnt)
+
+ISA.settings.close(globals())