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-rw-r--r--absl/copts/GENERATED_AbseilCopts.cmake18
-rw-r--r--absl/copts/GENERATED_copts.bzl18
-rw-r--r--absl/copts/configure_copts.bzl41
-rw-r--r--absl/copts/copts.py14
4 files changed, 91 insertions, 0 deletions
diff --git a/absl/copts/GENERATED_AbseilCopts.cmake b/absl/copts/GENERATED_AbseilCopts.cmake
index c4948d42..88400e98 100644
--- a/absl/copts/GENERATED_AbseilCopts.cmake
+++ b/absl/copts/GENERATED_AbseilCopts.cmake
@@ -218,3 +218,21 @@ list(APPEND ABSL_MSVC_TEST_FLAGS
"/wd4996"
"/DNOMINMAX"
)
+
+list(APPEND ABSL_RANDOM_HWAES_ARM32_FLAGS
+ "-mfpu=neon"
+)
+
+list(APPEND ABSL_RANDOM_HWAES_ARM64_FLAGS
+ "-march=armv8-a+crypto"
+)
+
+list(APPEND ABSL_RANDOM_HWAES_MSVC_X64_FLAGS
+ "/O2"
+ "/Ob2"
+)
+
+list(APPEND ABSL_RANDOM_HWAES_X64_FLAGS
+ "-maes"
+ "-msse4.1"
+)
diff --git a/absl/copts/GENERATED_copts.bzl b/absl/copts/GENERATED_copts.bzl
index 422b3a9b..d7edc936 100644
--- a/absl/copts/GENERATED_copts.bzl
+++ b/absl/copts/GENERATED_copts.bzl
@@ -219,3 +219,21 @@ ABSL_MSVC_TEST_FLAGS = [
"/wd4996",
"/DNOMINMAX",
]
+
+ABSL_RANDOM_HWAES_ARM32_FLAGS = [
+ "-mfpu=neon",
+]
+
+ABSL_RANDOM_HWAES_ARM64_FLAGS = [
+ "-march=armv8-a+crypto",
+]
+
+ABSL_RANDOM_HWAES_MSVC_X64_FLAGS = [
+ "/O2",
+ "/Ob2",
+]
+
+ABSL_RANDOM_HWAES_X64_FLAGS = [
+ "-maes",
+ "-msse4.1",
+]
diff --git a/absl/copts/configure_copts.bzl b/absl/copts/configure_copts.bzl
index 00159317..8c4efe77 100644
--- a/absl/copts/configure_copts.bzl
+++ b/absl/copts/configure_copts.bzl
@@ -16,6 +16,10 @@ load(
"ABSL_MSVC_FLAGS",
"ABSL_MSVC_LINKOPTS",
"ABSL_MSVC_TEST_FLAGS",
+ "ABSL_RANDOM_HWAES_ARM32_FLAGS",
+ "ABSL_RANDOM_HWAES_ARM64_FLAGS",
+ "ABSL_RANDOM_HWAES_MSVC_X64_FLAGS",
+ "ABSL_RANDOM_HWAES_X64_FLAGS",
)
ABSL_DEFAULT_COPTS = select({
@@ -46,3 +50,40 @@ ABSL_DEFAULT_LINKOPTS = select({
"//absl:windows": ABSL_MSVC_LINKOPTS,
"//conditions:default": [],
})
+
+# ABSL_RANDOM_RANDEN_COPTS blaze copts flags which are required by each
+# environment to build an accelerated RandenHwAes library.
+ABSL_RANDOM_RANDEN_COPTS = select({
+ # APPLE
+ ":cpu_darwin_x86_64": ABSL_RANDOM_HWAES_X64_FLAGS,
+ ":cpu_darwin": ABSL_RANDOM_HWAES_X64_FLAGS,
+ ":cpu_x64_windows_msvc": ABSL_RANDOM_HWAES_MSVC_X64_FLAGS,
+ ":cpu_x64_windows": ABSL_RANDOM_HWAES_MSVC_X64_FLAGS,
+ ":cpu_haswell": ABSL_RANDOM_HWAES_X64_FLAGS,
+ ":cpu_ppc": ["-mcrypto"],
+
+ # Supported by default or unsupported.
+ "//conditions:default": [],
+})
+
+# absl_random_randen_copts_init:
+# Initialize the config targets based on cpu, os, etc. used to select
+# the required values for ABSL_RANDOM_RANDEN_COPTS
+def absl_random_randen_copts_init():
+ """Initialize the config_settings used by ABSL_RANDOM_RANDEN_COPTS."""
+
+ # CPU configs.
+ # These configs have consistent flags to enable HWAES intsructions.
+ cpu_configs = [
+ "ppc",
+ "haswell",
+ "darwin_x86_64",
+ "darwin",
+ "x64_windows_msvc",
+ "x64_windows",
+ ]
+ for cpu in cpu_configs:
+ native.config_setting(
+ name = "cpu_%s" % cpu,
+ values = {"cpu": cpu},
+ )
diff --git a/absl/copts/copts.py b/absl/copts/copts.py
index 5bede34c..d850bb4f 100644
--- a/absl/copts/copts.py
+++ b/absl/copts/copts.py
@@ -199,4 +199,18 @@ COPT_VARS = {
# Object file doesn't export any previously undefined symbols
"-ignore:4221",
],
+ # "HWAES" is an abbreviation for "hardware AES" (AES - Advanced Encryption
+ # Standard). These flags are used for detecting whether or not the target
+ # architecture has hardware support for AES instructions which can be used
+ # to improve performance of some random bit generators.
+ "ABSL_RANDOM_HWAES_ARM64_FLAGS": ["-march=armv8-a+crypto"],
+ "ABSL_RANDOM_HWAES_ARM32_FLAGS": ["-mfpu=neon"],
+ "ABSL_RANDOM_HWAES_X64_FLAGS": [
+ "-maes",
+ "-msse4.1",
+ ],
+ "ABSL_RANDOM_HWAES_MSVC_X64_FLAGS": [
+ "/O2", # Maximize speed
+ "/Ob2", # Aggressive inlining
+ ],
}