Remove the CRYPTO_is_*_capable_at_runtime indirection

I think this dates to when CRYPTO_is_*_capable were inline functions in
public headers, so they couldn't access OPENSSL_armcap_P directly. Now
they can.

Change-Id: Ic06fffa7f5056401118b62d690dfe6b21bc30f86
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/62345
Auto-Submit: David Benjamin <davidben@google.com>
Commit-Queue: Bob Beck <bbe@google.com>
Reviewed-by: Bob Beck <bbe@google.com>

crypto/CMakeLists.txt

@@ -134,7 +134,6 @@ add_library(
   cpu_aarch64_win.c
   cpu_arm_freebsd.c
   cpu_arm_linux.c
-  cpu_arm.c
   cpu_intel.c
   crypto.c
   curve25519/curve25519.c

crypto/cpu_arm.c

@@ -1,36 +0,0 @@
-/* Copyright (c) 2014, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
-#include "internal.h"
-
-#if (defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)) && \
-    !defined(OPENSSL_STATIC_ARMCAP)
-
-#include <openssl/arm_arch.h>
-
-
-int CRYPTO_is_NEON_capable_at_runtime(void) {
-  return (OPENSSL_armcap_P & ARMV7_NEON) != 0;
-}
-
-int CRYPTO_is_ARMv8_AES_capable_at_runtime(void) {
-  return (OPENSSL_armcap_P & ARMV8_AES) != 0;
-}
-
-int CRYPTO_is_ARMv8_PMULL_capable_at_runtime(void) {
-  return (OPENSSL_armcap_P & ARMV8_PMULL) != 0;
-}
-
-#endif  /* (defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)) &&
-           !defined(OPENSSL_STATIC_ARMCAP) */

crypto/internal.h

@@ -109,6 +109,7 @@
 #ifndef OPENSSL_HEADER_CRYPTO_INTERNAL_H
 #define OPENSSL_HEADER_CRYPTO_INTERNAL_H
 
+#include <openssl/arm_arch.h>
 #include <openssl/crypto.h>
 #include <openssl/ex_data.h>
 #include <openssl/stack.h>
@@ -1379,21 +1380,6 @@ extern uint32_t OPENSSL_armcap_P;
 #endif
 #endif
 
-#if !defined(OPENSSL_STATIC_ARMCAP)
-// CRYPTO_is_NEON_capable_at_runtime returns true if the current CPU has a NEON
-// unit. Note that |OPENSSL_armcap_P| also exists and contains the same
-// information in a form that's easier for assembly to use.
-OPENSSL_EXPORT int CRYPTO_is_NEON_capable_at_runtime(void);
-
-// CRYPTO_is_ARMv8_AES_capable_at_runtime returns true if the current CPU
-// supports the ARMv8 AES instruction.
-int CRYPTO_is_ARMv8_AES_capable_at_runtime(void);
-
-// CRYPTO_is_ARMv8_PMULL_capable_at_runtime returns true if the current CPU
-// supports the ARMv8 PMULL instruction.
-int CRYPTO_is_ARMv8_PMULL_capable_at_runtime(void);
-#endif  // !OPENSSL_STATIC_ARMCAP
-
 // CRYPTO_is_NEON_capable returns true if the current CPU has a NEON unit. If
 // this is known statically, it is a constant inline function.
 OPENSSL_INLINE int CRYPTO_is_NEON_capable(void) {
@@ -1402,7 +1388,7 @@ OPENSSL_INLINE int CRYPTO_is_NEON_capable(void) {
 #elif defined(OPENSSL_STATIC_ARMCAP)
   return 0;
 #else
-  return CRYPTO_is_NEON_capable_at_runtime();
+  return (OPENSSL_armcap_P & ARMV7_NEON) != 0;
 #endif
 }
 
@@ -1412,7 +1398,7 @@ OPENSSL_INLINE int CRYPTO_is_ARMv8_AES_capable(void) {
 #elif defined(OPENSSL_STATIC_ARMCAP)
   return 0;
 #else
-  return CRYPTO_is_ARMv8_AES_capable_at_runtime();
+  return (OPENSSL_armcap_P & ARMV8_AES) != 0;
 #endif
 }
 
@@ -1422,7 +1408,7 @@ OPENSSL_INLINE int CRYPTO_is_ARMv8_PMULL_capable(void) {
 #elif defined(OPENSSL_STATIC_ARMCAP)
   return 0;
 #else
-  return CRYPTO_is_ARMv8_PMULL_capable_at_runtime();
+  return (OPENSSL_armcap_P & ARMV8_PMULL) != 0;
 #endif
 }