aes-ppc: use target and optimize attributes for P8 and P9

* cipher/rijndael-ppc-functions.h: Add PPC_OPT_ATTR attribute
macro for all functions.
* cipher/rijndael-ppc.c (FUNC_ATTR_OPT, PPC_OPT_ATTR): New.
(_gcry_aes_ppc8_setkey, _gcry_aes_ppc8_prepare_decryption): Add
PPC_OPT_ATTR attribute macro.
* cipher/rijndael-ppc9le.c (FUNC_ATTR_OPT, PPC_OPT_ATTR): New.
--

This change makes sure that PPC accelerated AES gets compiled
with proper optimization level and right target setting.

Benchmark on POWER9:
 AES            |  nanosecs/byte   mebibytes/sec   cycles/byte
        ECB enc |     0.305 ns/B      3129 MiB/s     0.701 c/B
        ECB dec |     0.305 ns/B      3127 MiB/s     0.701 c/B
        CBC enc |      1.66 ns/B     575.3 MiB/s      3.81 c/B
        CBC dec |     0.318 ns/B      2997 MiB/s     0.732 c/B
        CFB enc |      1.66 ns/B     574.7 MiB/s      3.82 c/B
        CFB dec |     0.319 ns/B      2987 MiB/s     0.734 c/B
        OFB enc |      2.15 ns/B     443.4 MiB/s      4.95 c/B
        OFB dec |      2.15 ns/B     443.3 MiB/s      4.95 c/B
        CTR enc |     0.328 ns/B      2907 MiB/s     0.754 c/B
        CTR dec |     0.328 ns/B      2906 MiB/s     0.755 c/B
        XTS enc |     0.516 ns/B      1849 MiB/s      1.19 c/B
        XTS dec |     0.515 ns/B      1850 MiB/s      1.19 c/B
        CCM enc |      1.98 ns/B     480.6 MiB/s      4.56 c/B
        CCM dec |      1.98 ns/B     480.5 MiB/s      4.56 c/B
       CCM auth |      1.66 ns/B     574.9 MiB/s      3.82 c/B
        EAX enc |      1.99 ns/B     480.2 MiB/s      4.57 c/B
        EAX dec |      1.99 ns/B     480.2 MiB/s      4.57 c/B
       EAX auth |      1.66 ns/B     575.2 MiB/s      3.81 c/B
        GCM enc |     0.552 ns/B      1727 MiB/s      1.27 c/B
        GCM dec |     0.552 ns/B      1728 MiB/s      1.27 c/B
       GCM auth |     0.225 ns/B      4240 MiB/s     0.517 c/B
        OCB enc |     0.381 ns/B      2504 MiB/s     0.876 c/B
        OCB dec |     0.385 ns/B      2477 MiB/s     0.886 c/B
       OCB auth |     0.356 ns/B      2682 MiB/s     0.818 c/B
        SIV enc |      1.98 ns/B     480.9 MiB/s      4.56 c/B
        SIV dec |      2.11 ns/B     452.9 MiB/s      4.84 c/B
       SIV auth |      1.66 ns/B     575.4 MiB/s      3.81 c/B
    GCM-SIV enc |     0.726 ns/B      1314 MiB/s      1.67 c/B
    GCM-SIV dec |     0.843 ns/B      1131 MiB/s      1.94 c/B
   GCM-SIV auth |     0.377 ns/B      2527 MiB/s     0.868 c/B

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>

1 files changed, 15 insertions, 2 deletions

diff --git a/cipher/rijndael-ppc.c b/cipher/rijndael-ppc.c
index d16fbb40..f376e0f1 100644
--- a/cipher/rijndael-ppc.c
+++ b/cipher/rijndael-ppc.c
@@ -34,6 +34,19 @@
 #include "rijndael-ppc-common.h"
 
 
+#ifdef HAVE_GCC_ATTRIBUTE_OPTIMIZE
+# define FUNC_ATTR_OPT __attribute__((optimize("-O2")))
+#else
+# define FUNC_ATTR_OPT
+#endif
+
+#ifdef HAVE_GCC_ATTRIBUTE_PPC_TARGET
+# define PPC_OPT_ATTR __attribute__((target("cpu=power8"))) FUNC_ATTR_OPT
+#else
+# define PPC_OPT_ATTR FUNC_ATTR_OPT
+#endif
+
+
 #ifndef WORDS_BIGENDIAN
 static const block vec_bswap32_const_neg =
   { ~3, ~2, ~1, ~0, ~7, ~6, ~5, ~4, ~11, ~10, ~9, ~8, ~15, ~14, ~13, ~12 };
@@ -124,7 +137,7 @@ keysched_idx(unsigned int in)
 }
 
 
-void
+void PPC_OPT_ATTR
 _gcry_aes_ppc8_setkey (RIJNDAEL_context *ctx, const byte *key)
 {
   u32 tk_u32[MAXKC];
@@ -179,7 +192,7 @@ _gcry_aes_ppc8_setkey (RIJNDAEL_context *ctx, const byte *key)
 }
 
 
-void
+void PPC_OPT_ATTR
 _gcry_aes_ppc8_prepare_decryption (RIJNDAEL_context *ctx)
 {
   internal_aes_ppc_prepare_decryption (ctx);