Minor optimization in AES_set_encryption_key for x86_64. (e59f992b) · Commits · CYBER - Cyber Security / TS 103 523 MSP / TLMSP / TLMSP OpenSSL

crypto/aes/asm/aes-x86_64.pl

+24 −39

Original line number	Diff line number	Diff line
		@@ -1313,15 +1313,12 @@ AES_set_encrypt_key:
		jmp .Lexit

		.L10rounds:
		mov 0(%rsi),%eax # copy first 4 dwords
		mov 4(%rsi),%ebx
		mov 8(%rsi),%ecx
		mov 12(%rsi),%edx
		mov %eax,0(%rdi)
		mov %ebx,4(%rdi)
		mov %ecx,8(%rdi)
		mov %edx,12(%rdi)
		mov 0(%rsi),%rax # copy first 4 dwords
		mov 8(%rsi),%rdx
		mov %rax,0(%rdi)
		mov %rdx,8(%rdi)

		shr \$32,%rdx
		xor %ecx,%ecx
		jmp .L10shortcut
		.align 4
		@@ -1349,19 +1346,14 @@ $code.=<<___;
		jmp .Lexit

		.L12rounds:
		mov 0(%rsi),%eax # copy first 6 dwords
		mov 4(%rsi),%ebx
		mov 8(%rsi),%ecx
		mov 12(%rsi),%edx
		mov %eax,0(%rdi)
		mov %ebx,4(%rdi)
		mov %ecx,8(%rdi)
		mov %edx,12(%rdi)
		mov 16(%rsi),%ecx
		mov 20(%rsi),%edx
		mov %ecx,16(%rdi)
		mov %edx,20(%rdi)
		mov 0(%rsi),%rax # copy first 6 dwords
		mov 8(%rsi),%rbx
		mov 16(%rsi),%rdx
		mov %rax,0(%rdi)
		mov %rbx,8(%rdi)
		mov %rdx,16(%rdi)

		shr \$32,%rdx
		xor %ecx,%ecx
		jmp .L12shortcut
		.align 4
		@@ -1397,30 +1389,23 @@ $code.=<<___;
		jmp .Lexit

		.L14rounds:
		mov 0(%rsi),%eax # copy first 8 dwords
		mov 4(%rsi),%ebx
		mov 8(%rsi),%ecx
		mov 12(%rsi),%edx
		mov %eax,0(%rdi)
		mov %ebx,4(%rdi)
		mov %ecx,8(%rdi)
		mov %edx,12(%rdi)
		mov 16(%rsi),%eax
		mov 20(%rsi),%ebx
		mov 24(%rsi),%ecx
		mov 28(%rsi),%edx
		mov %eax,16(%rdi)
		mov %ebx,20(%rdi)
		mov %ecx,24(%rdi)
		mov %edx,28(%rdi)
		mov 0(%rsi),%rax # copy first 8 dwords
		mov 8(%rsi),%rbx
		mov 16(%rsi),%rcx
		mov 24(%rsi),%rdx
		mov %rax,0(%rdi)
		mov %rbx,8(%rdi)
		mov %rcx,16(%rdi)
		mov %rdx,24(%rdi)

		shr \$32,%rdx
		xor %ecx,%ecx
		jmp .L14shortcut
		.align 4
		.L14loop:
		mov 0(%rdi),%eax # rk[0]
		mov 28(%rdi),%edx # rk[4]
		.L14shortcut:
		mov 0(%rdi),%eax # rk[0]
		___
		&enckey ();
		$code.=<<___;