crypto/armcap.c: detect hardware-assisted SHA512 support.
[openssl.git] / crypto / arm64cpuid.pl
index b9501eb..68734f5 100755 (executable)
@@ -63,12 +63,71 @@ _armv8_sha256_probe:
        sha256su0       v0.4s, v0.4s
        ret
 .size  _armv8_sha256_probe,.-_armv8_sha256_probe
+
 .globl _armv8_pmull_probe
 .type  _armv8_pmull_probe,%function
 _armv8_pmull_probe:
        pmull   v0.1q, v0.1d, v0.1d
        ret
 .size  _armv8_pmull_probe,.-_armv8_pmull_probe
+
+.globl _armv8_sha512_probe
+.type  _armv8_sha512_probe,%function
+_armv8_sha512_probe:
+       .long   0xcec08000      // sha512su0    v0.2d,v0.2d
+       ret
+.size  _armv8_sha512_probe,.-_armv8_sha512_probe
+
+.globl OPENSSL_cleanse
+.type  OPENSSL_cleanse,%function
+.align 5
+OPENSSL_cleanse:
+       cbz     x1,.Lret        // len==0?
+       cmp     x1,#15
+       b.hi    .Lot            // len>15
+       nop
+.Little:
+       strb    wzr,[x0],#1     // store byte-by-byte
+       subs    x1,x1,#1
+       b.ne    .Little
+.Lret: ret
+
+.align 4
+.Lot:  tst     x0,#7
+       b.eq    .Laligned       // inp is aligned
+       strb    wzr,[x0],#1     // store byte-by-byte
+       sub     x1,x1,#1
+       b       .Lot
+
+.align 4
+.Laligned:
+       str     xzr,[x0],#8     // store word-by-word
+       sub     x1,x1,#8
+       tst     x1,#-8
+       b.ne    .Laligned       // len>=8
+       cbnz    x1,.Little      // len!=0?
+       ret
+.size  OPENSSL_cleanse,.-OPENSSL_cleanse
+
+.globl CRYPTO_memcmp
+.type  CRYPTO_memcmp,%function
+.align 4
+CRYPTO_memcmp:
+       eor     w3,w3,w3
+       cbz     x2,.Lno_data    // len==0?
+.Loop_cmp:
+       ldrb    w4,[x0],#1
+       ldrb    w5,[x1],#1
+       eor     w4,w4,w5
+       orr     w3,w3,w4
+       subs    x2,x2,#1
+       b.ne    .Loop_cmp
+
+.Lno_data:
+       neg     w0,w3
+       lsr     w0,w0,#31
+       ret
+.size  CRYPTO_memcmp,.-CRYPTO_memcmp
 ___
 
 print $code;