Remove unused vpaes_ecb_decrypt from ARMv8 vpaes assembly

vpaes_ecb_decrypt in vpaes-armv8.pl was never referenced.  It also
contained a bug: the single-block path called _vpaes_encrypt_core
instead of _vpaes_decrypt_core.  Delete the dead function.

Resolves: https://github.com/openssl/openssl/issues/30341
CLA: trivial

Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Eugene Syromiatnikov <esyr@openssl.org>
MergeDate: Thu Mar 19 20:36:27 2026
(Merged from https://github.com/openssl/openssl/pull/30423)

diff --git a/crypto/aes/asm/vpaes-armv8.pl b/crypto/aes/asm/vpaes-armv8.pl
index a8cc8c3f78e270cb48206ae53beb060161340d70..1e348aafc7edd257fa0b4c0694d9ccb337c878aa 100755 (executable)
--- a/crypto/aes/asm/vpaes-armv8.pl
+++ b/crypto/aes/asm/vpaes-armv8.pl
@@ -1254,48 +1254,6 @@ vpaes_ecb_encrypt:
        AARCH64_VALIDATE_LINK_REGISTER
        ret
 .size  vpaes_ecb_encrypt,.-vpaes_ecb_encrypt
-
-.globl vpaes_ecb_decrypt
-.type  vpaes_ecb_decrypt,%function
-.align 4
-vpaes_ecb_decrypt:
-       AARCH64_SIGN_LINK_REGISTER
-       stp     x29,x30,[sp,#-16]!
-       add     x29,sp,#0
-       stp     d8,d9,[sp,#-16]!        // ABI spec says so
-       stp     d10,d11,[sp,#-16]!
-       stp     d12,d13,[sp,#-16]!
-       stp     d14,d15,[sp,#-16]!
-
-       mov     x17, $len
-       mov     x2,  $key
-       bl      _vpaes_decrypt_preheat
-       tst     x17, #16
-       b.eq    .Lecb_dec_loop
-
-       ld1     {v7.16b}, [$inp],#16
-       bl      _vpaes_encrypt_core
-       st1     {v0.16b}, [$out],#16
-       subs    x17, x17, #16
-       b.ls    .Lecb_dec_done
-
-.align 4
-.Lecb_dec_loop:
-       ld1     {v14.16b,v15.16b}, [$inp], #32
-       bl      _vpaes_decrypt_2x
-       st1     {v0.16b,v1.16b}, [$out], #32
-       subs    x17, x17, #32
-       b.hi    .Lecb_dec_loop
-
-.Lecb_dec_done:
-       ldp     d14,d15,[sp],#16
-       ldp     d12,d13,[sp],#16
-       ldp     d10,d11,[sp],#16
-       ldp     d8,d9,[sp],#16
-       ldp     x29,x30,[sp],#16
-       AARCH64_VALIDATE_LINK_REGISTER
-       ret
-.size  vpaes_ecb_decrypt,.-vpaes_ecb_decrypt
 ___
 }      }
 print $code;