crypto/x86_64cpuid.pl - third_party/openssl - Git at Google

 #! /usr/bin/env perl
 # Copyright 2005-2021 The OpenSSL Project Authors. All Rights Reserved.
 #
 # Licensed under the Apache License 2.0 (the "License").  You may not use
 # this file except in compliance with the License.  You can obtain a copy
 # in the file LICENSE in the source distribution or at
 # https://www.openssl.org/source/license.html


 # $output is the last argument if it looks like a file (it has an extension)
 # $flavour is the first argument if it doesn't look like a file
 $output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
 $flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;

 $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);

 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
 ( $xlate="${dir}perlasm/x86_64-xlate.pl" and -f $xlate) or
 die "can't locate x86_64-xlate.pl";

 open OUT,"| \"$^X\" \"$xlate\" $flavour \"$output\""
      or die "can't call $xlate: $!";
 *STDOUT=*OUT;

 ($arg1,$arg2,$arg3,$arg4)=$win64?("%rcx","%rdx","%r8", "%r9") :	# Win64 order
 				 ("%rdi","%rsi","%rdx","%rcx");	# Unix order

 print<<___;
 .extern		OPENSSL_cpuid_setup
 .hidden		OPENSSL_cpuid_setup
 .section	.init
 	call	OPENSSL_cpuid_setup

 .hidden	OPENSSL_ia32cap_P
 .comm	OPENSSL_ia32cap_P,16,4

 .text

 .globl	OPENSSL_atomic_add
 .type	OPENSSL_atomic_add,\@abi-omnipotent
 .align	16
 OPENSSL_atomic_add:
 .cfi_startproc
 	endbranch
 	movl	($arg1),%eax
 .Lspin:	leaq	($arg2,%rax),%r8
 	.byte	0xf0		# lock
 	cmpxchgl	%r8d,($arg1)
 	jne	.Lspin
 	movl	%r8d,%eax
 	.byte	0x48,0x98	# cltq/cdqe
 	ret
 .cfi_endproc
 .size	OPENSSL_atomic_add,.-OPENSSL_atomic_add

 .globl	OPENSSL_rdtsc
 .type	OPENSSL_rdtsc,\@abi-omnipotent
 .align	16
 OPENSSL_rdtsc:
 .cfi_startproc
 	endbranch
 	rdtsc
 	shl	\$32,%rdx
 	or	%rdx,%rax
 	ret
 .cfi_endproc
 .size	OPENSSL_rdtsc,.-OPENSSL_rdtsc

 .globl	OPENSSL_ia32_cpuid
 .type	OPENSSL_ia32_cpuid,\@function,1
 .align	16
 OPENSSL_ia32_cpuid:
 .cfi_startproc
 	endbranch
 	mov	%rbx,%r8		# save %rbx
 .cfi_register	%rbx,%r8

 	xor	%eax,%eax
 	mov	%rax,8(%rdi)		# clear extended feature flags
 	cpuid
 	mov	%eax,%r11d		# max value for standard query level

 	xor	%eax,%eax
 	cmp	\$0x756e6547,%ebx	# "Genu"
 	setne	%al
 	mov	%eax,%r9d
 	cmp	\$0x49656e69,%edx	# "ineI"
 	setne	%al
 	or	%eax,%r9d
 	cmp	\$0x6c65746e,%ecx	# "ntel"
 	setne	%al
 	or	%eax,%r9d		# 0 indicates Intel CPU
 	jz	.Lintel

 	cmp	\$0x68747541,%ebx	# "Auth"
 	setne	%al
 	mov	%eax,%r10d
 	cmp	\$0x69746E65,%edx	# "enti"
 	setne	%al
 	or	%eax,%r10d
 	cmp	\$0x444D4163,%ecx	# "cAMD"
 	setne	%al
 	or	%eax,%r10d		# 0 indicates AMD CPU
 	jnz	.Lintel

 	# AMD specific
 	mov	\$0x80000000,%eax
 	cpuid
 	cmp	\$0x80000001,%eax
 	jb	.Lintel
 	mov	%eax,%r10d
 	mov	\$0x80000001,%eax
 	cpuid
 	or	%ecx,%r9d
 	and	\$0x00000801,%r9d	# isolate AMD XOP bit, 1<<11

 	cmp	\$0x80000008,%r10d
 	jb	.Lintel

 	mov	\$0x80000008,%eax
 	cpuid
 	movzb	%cl,%r10		# number of cores - 1
 	inc	%r10			# number of cores

 	mov	\$1,%eax
 	cpuid
 	bt	\$28,%edx		# test hyper-threading bit
 	jnc	.Lgeneric
 	shr	\$16,%ebx		# number of logical processors
 	cmp	%r10b,%bl
 	ja	.Lgeneric
 	and	\$0xefffffff,%edx	# ~(1<<28)
 	jmp	.Lgeneric

 .Lintel:
 	cmp	\$4,%r11d
 	mov	\$-1,%r10d
 	jb	.Lnocacheinfo

 	mov	\$4,%eax
 	mov	\$0,%ecx		# query L1D
 	cpuid
 	mov	%eax,%r10d
 	shr	\$14,%r10d
 	and	\$0xfff,%r10d		# number of cores -1 per L1D

 .Lnocacheinfo:
 	mov	\$1,%eax
 	cpuid
 	movd	%eax,%xmm0		# put aside processor id
 	and	\$0xbfefffff,%edx	# force reserved bits to 0
 	cmp	\$0,%r9d
 	jne	.Lnotintel
 	or	\$0x40000000,%edx	# set reserved bit#30 on Intel CPUs
 	and	\$15,%ah
 	cmp	\$15,%ah		# examine Family ID
 	jne	.LnotP4
 	or	\$0x00100000,%edx	# set reserved bit#20 to engage RC4_CHAR
 .LnotP4:
 	cmp	\$6,%ah
 	jne	.Lnotintel
 	and	\$0x0fff0ff0,%eax
 	cmp	\$0x00050670,%eax	# Knights Landing
 	je	.Lknights
 	cmp	\$0x00080650,%eax	# Knights Mill (according to sde)
 	jne	.Lnotintel
 .Lknights:
 	and	\$0xfbffffff,%ecx	# clear XSAVE flag to mimic Silvermont

 .Lnotintel:
 	bt	\$28,%edx		# test hyper-threading bit
 	jnc	.Lgeneric
 	and	\$0xefffffff,%edx	# ~(1<<28)
 	cmp	\$0,%r10d
 	je	.Lgeneric

 	or	\$0x10000000,%edx	# 1<<28
 	shr	\$16,%ebx
 	cmp	\$1,%bl			# see if cache is shared
 	ja	.Lgeneric
 	and	\$0xefffffff,%edx	# ~(1<<28)
 .Lgeneric:
 	and	\$0x00000800,%r9d	# isolate AMD XOP flag
 	and	\$0xfffff7ff,%ecx
 	or	%ecx,%r9d		# merge AMD XOP flag

 	mov	%edx,%r10d		# %r9d:%r10d is copy of %ecx:%edx

 	cmp	\$7,%r11d
 	jb	.Lno_extended_info
 	mov	\$7,%eax
 	xor	%ecx,%ecx
 	cpuid
 	bt	\$26,%r9d		# check XSAVE bit, cleared on Knights
 	jc	.Lnotknights
 	and	\$0xfff7ffff,%ebx	# clear ADCX/ADOX flag
 .Lnotknights:
 	movd	%xmm0,%eax		# restore processor id
 	and	\$0x0fff0ff0,%eax
 	cmp	\$0x00050650,%eax	# Skylake-X
 	jne	.Lnotskylakex
 	and	\$0xfffeffff,%ebx	# ~(1<<16)
 					# suppress AVX512F flag on Skylake-X
 .Lnotskylakex:
 	mov	%ebx,8(%rdi)		# save extended feature flags
 	mov	%ecx,12(%rdi)
 .Lno_extended_info:

 	bt	\$27,%r9d		# check OSXSAVE bit
 	jnc	.Lclear_avx
 	xor	%ecx,%ecx		# XCR0
 	.byte	0x0f,0x01,0xd0		# xgetbv
 	and	\$0xe6,%eax		# isolate XMM, YMM and ZMM state support
 	cmp	\$0xe6,%eax
 	je	.Ldone
 	andl	\$0x3fdeffff,8(%rdi)	# ~(1<<31|1<<30|1<<21|1<<16)
 					# clear AVX512F+BW+VL+IFMA, all of
 					# them are EVEX-encoded, which requires
 					# ZMM state support even if one uses
 					# only XMM and YMM :-(
 	and	\$6,%eax		# isolate XMM and YMM state support
 	cmp	\$6,%eax
 	je	.Ldone
 .Lclear_avx:
 	mov	\$0xefffe7ff,%eax	# ~(1<<28|1<<12|1<<11)
 	and	%eax,%r9d		# clear AVX, FMA and AMD XOP bits
 	mov	\$0x3fdeffdf,%eax	# ~(1<<31|1<<30|1<<21|1<<16|1<<5)
 	and	%eax,8(%rdi)		# clear AVX2 and AVX512* bits
 .Ldone:
 	shl	\$32,%r9
 	mov	%r10d,%eax
 	mov	%r8,%rbx		# restore %rbx
 .cfi_restore	%rbx
 	or	%r9,%rax
 	ret
 .cfi_endproc
 .size	OPENSSL_ia32_cpuid,.-OPENSSL_ia32_cpuid

 .globl  OPENSSL_cleanse
 .type   OPENSSL_cleanse,\@abi-omnipotent
 .align  16
 OPENSSL_cleanse:
 .cfi_startproc
 	endbranch
 	xor	%rax,%rax
 	cmp	\$15,$arg2
 	jae	.Lot
 	cmp	\$0,$arg2
 	je	.Lret
 .Little:
 	mov	%al,($arg1)
 	sub	\$1,$arg2
 	lea	1($arg1),$arg1
 	jnz	.Little
 .Lret:
 	ret
 .align	16
 .Lot:
 	test	\$7,$arg1
 	jz	.Laligned
 	mov	%al,($arg1)
 	lea	-1($arg2),$arg2
 	lea	1($arg1),$arg1
 	jmp	.Lot
 .Laligned:
 	mov	%rax,($arg1)
 	lea	-8($arg2),$arg2
 	test	\$-8,$arg2
 	lea	8($arg1),$arg1
 	jnz	.Laligned
 	cmp	\$0,$arg2
 	jne	.Little
 	ret
 .cfi_endproc
 .size	OPENSSL_cleanse,.-OPENSSL_cleanse

 .globl  CRYPTO_memcmp
 .type   CRYPTO_memcmp,\@abi-omnipotent
 .align  16
 CRYPTO_memcmp:
 .cfi_startproc
 	endbranch
 	xor	%rax,%rax
 	xor	%r10,%r10
 	cmp	\$0,$arg3
 	je	.Lno_data
 	cmp	\$16,$arg3
 	jne	.Loop_cmp
 	mov	($arg1),%r10
 	mov	8($arg1),%r11
 	mov	\$1,$arg3
 	xor	($arg2),%r10
 	xor	8($arg2),%r11
 	or	%r11,%r10
 	cmovnz	$arg3,%rax
 	ret

 .align	16
 .Loop_cmp:
 	mov	($arg1),%r10b
 	lea	1($arg1),$arg1
 	xor	($arg2),%r10b
 	lea	1($arg2),$arg2
 	or	%r10b,%al
 	dec	$arg3
 	jnz	.Loop_cmp
 	neg	%rax
 	shr	\$63,%rax
 .Lno_data:
 	ret
 .cfi_endproc
 .size	CRYPTO_memcmp,.-CRYPTO_memcmp
 ___

 print<<___ if (!$win64);
 .globl	OPENSSL_wipe_cpu
 .type	OPENSSL_wipe_cpu,\@abi-omnipotent
 .align	16
 OPENSSL_wipe_cpu:
 .cfi_startproc
 	endbranch
 	pxor	%xmm0,%xmm0
 	pxor	%xmm1,%xmm1
 	pxor	%xmm2,%xmm2
 	pxor	%xmm3,%xmm3
 	pxor	%xmm4,%xmm4
 	pxor	%xmm5,%xmm5
 	pxor	%xmm6,%xmm6
 	pxor	%xmm7,%xmm7
 	pxor	%xmm8,%xmm8
 	pxor	%xmm9,%xmm9
 	pxor	%xmm10,%xmm10
 	pxor	%xmm11,%xmm11
 	pxor	%xmm12,%xmm12
 	pxor	%xmm13,%xmm13
 	pxor	%xmm14,%xmm14
 	pxor	%xmm15,%xmm15
 	xorq	%rcx,%rcx
 	xorq	%rdx,%rdx
 	xorq	%rsi,%rsi
 	xorq	%rdi,%rdi
 	xorq	%r8,%r8
 	xorq	%r9,%r9
 	xorq	%r10,%r10
 	xorq	%r11,%r11
 	leaq	8(%rsp),%rax
 	ret
 .cfi_endproc
 .size	OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
 ___
 print<<___ if ($win64);
 .globl	OPENSSL_wipe_cpu
 .type	OPENSSL_wipe_cpu,\@abi-omnipotent
 .align	16
 OPENSSL_wipe_cpu:
 	pxor	%xmm0,%xmm0
 	pxor	%xmm1,%xmm1
 	pxor	%xmm2,%xmm2
 	pxor	%xmm3,%xmm3
 	pxor	%xmm4,%xmm4
 	pxor	%xmm5,%xmm5
 	xorq	%rcx,%rcx
 	xorq	%rdx,%rdx
 	xorq	%r8,%r8
 	xorq	%r9,%r9
 	xorq	%r10,%r10
 	xorq	%r11,%r11
 	leaq	8(%rsp),%rax
 	ret
 .size	OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
 ___
 {
 my $out="%r10";
 my $cnt="%rcx";
 my $max="%r11";
 my $lasttick="%r8d";
 my $lastdiff="%r9d";
 my $redzone=win64?8:-8;

 print<<___;
 .globl	OPENSSL_instrument_bus
 .type	OPENSSL_instrument_bus,\@abi-omnipotent
 .align	16
 OPENSSL_instrument_bus:
 .cfi_startproc
 	endbranch
 	mov	$arg1,$out	# tribute to Win64
 	mov	$arg2,$cnt
 	mov	$arg2,$max

 	rdtsc			# collect 1st tick
 	mov	%eax,$lasttick	# lasttick = tick
 	mov	\$0,$lastdiff	# lastdiff = 0
 	clflush	($out)
 	.byte	0xf0		# lock
 	add	$lastdiff,($out)
 	jmp	.Loop
 .align	16
 .Loop:	rdtsc
 	mov	%eax,%edx
 	sub	$lasttick,%eax
 	mov	%edx,$lasttick
 	mov	%eax,$lastdiff
 	clflush	($out)
 	.byte	0xf0		# lock
 	add	%eax,($out)
 	lea	4($out),$out
 	sub	\$1,$cnt
 	jnz	.Loop

 	mov	$max,%rax
 	ret
 .cfi_endproc
 .size	OPENSSL_instrument_bus,.-OPENSSL_instrument_bus

 .globl	OPENSSL_instrument_bus2
 .type	OPENSSL_instrument_bus2,\@abi-omnipotent
 .align	16
 OPENSSL_instrument_bus2:
 .cfi_startproc
 	endbranch
 	mov	$arg1,$out	# tribute to Win64
 	mov	$arg2,$cnt
 	mov	$arg3,$max
 	mov	$cnt,$redzone(%rsp)

 	rdtsc			# collect 1st tick
 	mov	%eax,$lasttick	# lasttick = tick
 	mov	\$0,$lastdiff	# lastdiff = 0

 	clflush	($out)
 	.byte	0xf0		# lock
 	add	$lastdiff,($out)

 	rdtsc			# collect 1st diff
 	mov	%eax,%edx
 	sub	$lasttick,%eax	# diff
 	mov	%edx,$lasttick	# lasttick = tick
 	mov	%eax,$lastdiff	# lastdiff = diff
 .Loop2:
 	clflush	($out)
 	.byte	0xf0		# lock
 	add	%eax,($out)	# accumulate diff

 	sub	\$1,$max
 	jz	.Ldone2

 	rdtsc
 	mov	%eax,%edx
 	sub	$lasttick,%eax	# diff
 	mov	%edx,$lasttick	# lasttick = tick
 	cmp	$lastdiff,%eax
 	mov	%eax,$lastdiff	# lastdiff = diff
 	mov	\$0,%edx
 	setne	%dl
 	sub	%rdx,$cnt	# conditional --$cnt
 	lea	($out,%rdx,4),$out	# conditional ++$out
 	jnz	.Loop2

 .Ldone2:
 	mov	$redzone(%rsp),%rax
 	sub	$cnt,%rax
 	ret
 .cfi_endproc
 .size	OPENSSL_instrument_bus2,.-OPENSSL_instrument_bus2
 ___
 }

 sub gen_random {
 my $rdop = shift;
 print<<___;
 .globl	OPENSSL_ia32_${rdop}_bytes
 .type	OPENSSL_ia32_${rdop}_bytes,\@abi-omnipotent
 .align	16
 OPENSSL_ia32_${rdop}_bytes:
 .cfi_startproc
 	endbranch
 	xor	%rax, %rax	# return value
 	cmp	\$0,$arg2
 	je	.Ldone_${rdop}_bytes

 	mov	\$8,%r11
 .Loop_${rdop}_bytes:
 	${rdop}	%r10
 	jc	.Lbreak_${rdop}_bytes
 	dec	%r11
 	jnz	.Loop_${rdop}_bytes
 	jmp	.Ldone_${rdop}_bytes

 .align	16
 .Lbreak_${rdop}_bytes:
 	cmp	\$8,$arg2
 	jb	.Ltail_${rdop}_bytes
 	mov	%r10,($arg1)
 	lea	8($arg1),$arg1
 	add	\$8,%rax
 	sub	\$8,$arg2
 	jz	.Ldone_${rdop}_bytes
 	mov	\$8,%r11
 	jmp	.Loop_${rdop}_bytes

 .align	16
 .Ltail_${rdop}_bytes:
 	mov	%r10b,($arg1)
 	lea	1($arg1),$arg1
 	inc	%rax
 	shr	\$8,%r10
 	dec	$arg2
 	jnz	.Ltail_${rdop}_bytes

 .Ldone_${rdop}_bytes:
 	xor	%r10,%r10	# Clear sensitive data from register
 	ret
 .cfi_endproc
 .size	OPENSSL_ia32_${rdop}_bytes,.-OPENSSL_ia32_${rdop}_bytes
 ___
 }
 gen_random("rdrand");
 gen_random("rdseed");

 close STDOUT or die "error closing STDOUT: $!";	# flush
	#! /usr/bin/env perl
	# Copyright 2005-2021 The OpenSSL Project Authors. All Rights Reserved.
	#
	# Licensed under the Apache License 2.0 (the "License"). You may not use
	# this file except in compliance with the License. You can obtain a copy
	# in the file LICENSE in the source distribution or at
	# https://www.openssl.org/source/license.html


	# $output is the last argument if it looks like a file (it has an extension)
	# $flavour is the first argument if it doesn't look like a file
	$output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m\|\.\w+$\| ? pop : undef;
	$flavour = $#ARGV >= 0 && $ARGV[0] !~ m\|\.\| ? shift : undef;

	$win64=0; $win64=1 if ($flavour =~ /[nm]asm\|mingw64/ \|\| $output =~ /\.asm$/);

	$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
	( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
	( $xlate="${dir}perlasm/x86_64-xlate.pl" and -f $xlate) or
	die "can't locate x86_64-xlate.pl";

	open OUT,"\| \"$^X\" \"$xlate\" $flavour \"$output\""
	or die "can't call $xlate: $!";
	STDOUT=OUT;

	($arg1,$arg2,$arg3,$arg4)=$win64?("%rcx","%rdx","%r8", "%r9") : # Win64 order
	("%rdi","%rsi","%rdx","%rcx"); # Unix order

	print<<___;
	.extern OPENSSL_cpuid_setup
	.hidden OPENSSL_cpuid_setup
	.section .init
	call OPENSSL_cpuid_setup

	.hidden OPENSSL_ia32cap_P
	.comm OPENSSL_ia32cap_P,16,4

	.text

	.globl OPENSSL_atomic_add
	.type OPENSSL_atomic_add,\@abi-omnipotent
	.align 16
	OPENSSL_atomic_add:
	.cfi_startproc
	endbranch
	movl ($arg1),%eax
	.Lspin: leaq ($arg2,%rax),%r8
	.byte 0xf0 # lock
	cmpxchgl %r8d,($arg1)
	jne .Lspin
	movl %r8d,%eax
	.byte 0x48,0x98 # cltq/cdqe
	ret
	.cfi_endproc
	.size OPENSSL_atomic_add,.-OPENSSL_atomic_add

	.globl OPENSSL_rdtsc
	.type OPENSSL_rdtsc,\@abi-omnipotent
	.align 16
	OPENSSL_rdtsc:
	.cfi_startproc
	endbranch
	rdtsc
	shl \$32,%rdx
	or %rdx,%rax
	ret
	.cfi_endproc
	.size OPENSSL_rdtsc,.-OPENSSL_rdtsc

	.globl OPENSSL_ia32_cpuid
	.type OPENSSL_ia32_cpuid,\@function,1
	.align 16
	OPENSSL_ia32_cpuid:
	.cfi_startproc
	endbranch
	mov %rbx,%r8 # save %rbx
	.cfi_register %rbx,%r8

	xor %eax,%eax
	mov %rax,8(%rdi) # clear extended feature flags
	cpuid
	mov %eax,%r11d # max value for standard query level

	xor %eax,%eax
	cmp \$0x756e6547,%ebx # "Genu"
	setne %al
	mov %eax,%r9d
	cmp \$0x49656e69,%edx # "ineI"
	setne %al
	or %eax,%r9d
	cmp \$0x6c65746e,%ecx # "ntel"
	setne %al
	or %eax,%r9d # 0 indicates Intel CPU
	jz .Lintel

	cmp \$0x68747541,%ebx # "Auth"
	setne %al
	mov %eax,%r10d
	cmp \$0x69746E65,%edx # "enti"
	setne %al
	or %eax,%r10d
	cmp \$0x444D4163,%ecx # "cAMD"
	setne %al
	or %eax,%r10d # 0 indicates AMD CPU
	jnz .Lintel

	# AMD specific
	mov \$0x80000000,%eax
	cpuid
	cmp \$0x80000001,%eax
	jb .Lintel
	mov %eax,%r10d
	mov \$0x80000001,%eax
	cpuid
	or %ecx,%r9d
	and \$0x00000801,%r9d # isolate AMD XOP bit, 1<<11

	cmp \$0x80000008,%r10d
	jb .Lintel

	mov \$0x80000008,%eax
	cpuid
	movzb %cl,%r10 # number of cores - 1
	inc %r10 # number of cores

	mov \$1,%eax
	cpuid
	bt \$28,%edx # test hyper-threading bit
	jnc .Lgeneric
	shr \$16,%ebx # number of logical processors
	cmp %r10b,%bl
	ja .Lgeneric
	and \$0xefffffff,%edx # ~(1<<28)
	jmp .Lgeneric

	.Lintel:
	cmp \$4,%r11d
	mov \$-1,%r10d
	jb .Lnocacheinfo

	mov \$4,%eax
	mov \$0,%ecx # query L1D
	cpuid
	mov %eax,%r10d
	shr \$14,%r10d
	and \$0xfff,%r10d # number of cores -1 per L1D

	.Lnocacheinfo:
	mov \$1,%eax
	cpuid
	movd %eax,%xmm0 # put aside processor id
	and \$0xbfefffff,%edx # force reserved bits to 0
	cmp \$0,%r9d
	jne .Lnotintel
	or \$0x40000000,%edx # set reserved bit#30 on Intel CPUs
	and \$15,%ah
	cmp \$15,%ah # examine Family ID
	jne .LnotP4
	or \$0x00100000,%edx # set reserved bit#20 to engage RC4_CHAR
	.LnotP4:
	cmp \$6,%ah
	jne .Lnotintel
	and \$0x0fff0ff0,%eax
	cmp \$0x00050670,%eax # Knights Landing
	je .Lknights
	cmp \$0x00080650,%eax # Knights Mill (according to sde)
	jne .Lnotintel
	.Lknights:
	and \$0xfbffffff,%ecx # clear XSAVE flag to mimic Silvermont

	.Lnotintel:
	bt \$28,%edx # test hyper-threading bit
	jnc .Lgeneric
	and \$0xefffffff,%edx # ~(1<<28)
	cmp \$0,%r10d
	je .Lgeneric

	or \$0x10000000,%edx # 1<<28
	shr \$16,%ebx
	cmp \$1,%bl # see if cache is shared
	ja .Lgeneric
	and \$0xefffffff,%edx # ~(1<<28)
	.Lgeneric:
	and \$0x00000800,%r9d # isolate AMD XOP flag
	and \$0xfffff7ff,%ecx
	or %ecx,%r9d # merge AMD XOP flag

	mov %edx,%r10d # %r9d:%r10d is copy of %ecx:%edx

	cmp \$7,%r11d
	jb .Lno_extended_info
	mov \$7,%eax
	xor %ecx,%ecx
	cpuid
	bt \$26,%r9d # check XSAVE bit, cleared on Knights
	jc .Lnotknights
	and \$0xfff7ffff,%ebx # clear ADCX/ADOX flag
	.Lnotknights:
	movd %xmm0,%eax # restore processor id
	and \$0x0fff0ff0,%eax
	cmp \$0x00050650,%eax # Skylake-X
	jne .Lnotskylakex
	and \$0xfffeffff,%ebx # ~(1<<16)
	# suppress AVX512F flag on Skylake-X
	.Lnotskylakex:
	mov %ebx,8(%rdi) # save extended feature flags
	mov %ecx,12(%rdi)
	.Lno_extended_info:

	bt \$27,%r9d # check OSXSAVE bit
	jnc .Lclear_avx
	xor %ecx,%ecx # XCR0
	.byte 0x0f,0x01,0xd0 # xgetbv
	and \$0xe6,%eax # isolate XMM, YMM and ZMM state support
	cmp \$0xe6,%eax
	je .Ldone
	andl \$0x3fdeffff,8(%rdi) # ~(1<<31\|1<<30\|1<<21\|1<<16)
	# clear AVX512F+BW+VL+IFMA, all of
	# them are EVEX-encoded, which requires
	# ZMM state support even if one uses
	# only XMM and YMM :-(
	and \$6,%eax # isolate XMM and YMM state support
	cmp \$6,%eax
	je .Ldone
	.Lclear_avx:
	mov \$0xefffe7ff,%eax # ~(1<<28\|1<<12\|1<<11)
	and %eax,%r9d # clear AVX, FMA and AMD XOP bits
	mov \$0x3fdeffdf,%eax # ~(1<<31\|1<<30\|1<<21\|1<<16\|1<<5)
	and %eax,8(%rdi) # clear AVX2 and AVX512* bits
	.Ldone:
	shl \$32,%r9
	mov %r10d,%eax
	mov %r8,%rbx # restore %rbx
	.cfi_restore %rbx
	or %r9,%rax
	ret
	.cfi_endproc
	.size OPENSSL_ia32_cpuid,.-OPENSSL_ia32_cpuid

	.globl OPENSSL_cleanse
	.type OPENSSL_cleanse,\@abi-omnipotent
	.align 16
	OPENSSL_cleanse:
	.cfi_startproc
	endbranch
	xor %rax,%rax
	cmp \$15,$arg2
	jae .Lot
	cmp \$0,$arg2
	je .Lret
	.Little:
	mov %al,($arg1)
	sub \$1,$arg2
	lea 1($arg1),$arg1
	jnz .Little
	.Lret:
	ret
	.align 16
	.Lot:
	test \$7,$arg1
	jz .Laligned
	mov %al,($arg1)
	lea -1($arg2),$arg2
	lea 1($arg1),$arg1
	jmp .Lot
	.Laligned:
	mov %rax,($arg1)
	lea -8($arg2),$arg2
	test \$-8,$arg2
	lea 8($arg1),$arg1
	jnz .Laligned
	cmp \$0,$arg2
	jne .Little
	ret
	.cfi_endproc
	.size OPENSSL_cleanse,.-OPENSSL_cleanse

	.globl CRYPTO_memcmp
	.type CRYPTO_memcmp,\@abi-omnipotent
	.align 16
	CRYPTO_memcmp:
	.cfi_startproc
	endbranch
	xor %rax,%rax
	xor %r10,%r10
	cmp \$0,$arg3
	je .Lno_data
	cmp \$16,$arg3
	jne .Loop_cmp
	mov ($arg1),%r10
	mov 8($arg1),%r11
	mov \$1,$arg3
	xor ($arg2),%r10
	xor 8($arg2),%r11
	or %r11,%r10
	cmovnz $arg3,%rax
	ret

	.align 16
	.Loop_cmp:
	mov ($arg1),%r10b
	lea 1($arg1),$arg1
	xor ($arg2),%r10b
	lea 1($arg2),$arg2
	or %r10b,%al
	dec $arg3
	jnz .Loop_cmp
	neg %rax
	shr \$63,%rax
	.Lno_data:
	ret
	.cfi_endproc
	.size CRYPTO_memcmp,.-CRYPTO_memcmp
	___

	print<<___ if (!$win64);
	.globl OPENSSL_wipe_cpu
	.type OPENSSL_wipe_cpu,\@abi-omnipotent
	.align 16
	OPENSSL_wipe_cpu:
	.cfi_startproc
	endbranch
	pxor %xmm0,%xmm0
	pxor %xmm1,%xmm1
	pxor %xmm2,%xmm2
	pxor %xmm3,%xmm3
	pxor %xmm4,%xmm4
	pxor %xmm5,%xmm5
	pxor %xmm6,%xmm6
	pxor %xmm7,%xmm7
	pxor %xmm8,%xmm8
	pxor %xmm9,%xmm9
	pxor %xmm10,%xmm10
	pxor %xmm11,%xmm11
	pxor %xmm12,%xmm12
	pxor %xmm13,%xmm13
	pxor %xmm14,%xmm14
	pxor %xmm15,%xmm15
	xorq %rcx,%rcx
	xorq %rdx,%rdx
	xorq %rsi,%rsi
	xorq %rdi,%rdi
	xorq %r8,%r8
	xorq %r9,%r9
	xorq %r10,%r10
	xorq %r11,%r11
	leaq 8(%rsp),%rax
	ret
	.cfi_endproc
	.size OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
	___
	print<<___ if ($win64);
	.globl OPENSSL_wipe_cpu
	.type OPENSSL_wipe_cpu,\@abi-omnipotent
	.align 16
	OPENSSL_wipe_cpu:
	pxor %xmm0,%xmm0
	pxor %xmm1,%xmm1
	pxor %xmm2,%xmm2
	pxor %xmm3,%xmm3
	pxor %xmm4,%xmm4
	pxor %xmm5,%xmm5
	xorq %rcx,%rcx
	xorq %rdx,%rdx
	xorq %r8,%r8
	xorq %r9,%r9
	xorq %r10,%r10
	xorq %r11,%r11
	leaq 8(%rsp),%rax
	ret
	.size OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
	___
	{
	my $out="%r10";
	my $cnt="%rcx";
	my $max="%r11";
	my $lasttick="%r8d";
	my $lastdiff="%r9d";
	my $redzone=win64?8:-8;

	print<<___;
	.globl OPENSSL_instrument_bus
	.type OPENSSL_instrument_bus,\@abi-omnipotent
	.align 16
	OPENSSL_instrument_bus:
	.cfi_startproc
	endbranch
	mov $arg1,$out # tribute to Win64
	mov $arg2,$cnt
	mov $arg2,$max

	rdtsc # collect 1st tick
	mov %eax,$lasttick # lasttick = tick
	mov \$0,$lastdiff # lastdiff = 0
	clflush ($out)
	.byte 0xf0 # lock
	add $lastdiff,($out)
	jmp .Loop
	.align 16
	.Loop: rdtsc
	mov %eax,%edx
	sub $lasttick,%eax
	mov %edx,$lasttick
	mov %eax,$lastdiff
	clflush ($out)
	.byte 0xf0 # lock
	add %eax,($out)
	lea 4($out),$out
	sub \$1,$cnt
	jnz .Loop

	mov $max,%rax
	ret
	.cfi_endproc
	.size OPENSSL_instrument_bus,.-OPENSSL_instrument_bus

	.globl OPENSSL_instrument_bus2
	.type OPENSSL_instrument_bus2,\@abi-omnipotent
	.align 16
	OPENSSL_instrument_bus2:
	.cfi_startproc
	endbranch
	mov $arg1,$out # tribute to Win64
	mov $arg2,$cnt
	mov $arg3,$max
	mov $cnt,$redzone(%rsp)

	rdtsc # collect 1st tick
	mov %eax,$lasttick # lasttick = tick
	mov \$0,$lastdiff # lastdiff = 0

	clflush ($out)
	.byte 0xf0 # lock
	add $lastdiff,($out)

	rdtsc # collect 1st diff
	mov %eax,%edx
	sub $lasttick,%eax # diff
	mov %edx,$lasttick # lasttick = tick
	mov %eax,$lastdiff # lastdiff = diff
	.Loop2:
	clflush ($out)
	.byte 0xf0 # lock
	add %eax,($out) # accumulate diff

	sub \$1,$max
	jz .Ldone2

	rdtsc
	mov %eax,%edx
	sub $lasttick,%eax # diff
	mov %edx,$lasttick # lasttick = tick
	cmp $lastdiff,%eax
	mov %eax,$lastdiff # lastdiff = diff
	mov \$0,%edx
	setne %dl
	sub %rdx,$cnt # conditional --$cnt
	lea ($out,%rdx,4),$out # conditional ++$out
	jnz .Loop2

	.Ldone2:
	mov $redzone(%rsp),%rax
	sub $cnt,%rax
	ret
	.cfi_endproc
	.size OPENSSL_instrument_bus2,.-OPENSSL_instrument_bus2
	___
	}

	sub gen_random {
	my $rdop = shift;
	print<<___;
	.globl OPENSSL_ia32_${rdop}_bytes
	.type OPENSSL_ia32_${rdop}_bytes,\@abi-omnipotent
	.align 16
	OPENSSL_ia32_${rdop}_bytes:
	.cfi_startproc
	endbranch
	xor %rax, %rax # return value
	cmp \$0,$arg2
	je .Ldone_${rdop}_bytes

	mov \$8,%r11
	.Loop_${rdop}_bytes:
	${rdop} %r10
	jc .Lbreak_${rdop}_bytes
	dec %r11
	jnz .Loop_${rdop}_bytes
	jmp .Ldone_${rdop}_bytes

	.align 16
	.Lbreak_${rdop}_bytes:
	cmp \$8,$arg2
	jb .Ltail_${rdop}_bytes
	mov %r10,($arg1)
	lea 8($arg1),$arg1
	add \$8,%rax
	sub \$8,$arg2
	jz .Ldone_${rdop}_bytes
	mov \$8,%r11
	jmp .Loop_${rdop}_bytes

	.align 16
	.Ltail_${rdop}_bytes:
	mov %r10b,($arg1)
	lea 1($arg1),$arg1
	inc %rax
	shr \$8,%r10
	dec $arg2
	jnz .Ltail_${rdop}_bytes

	.Ldone_${rdop}_bytes:
	xor %r10,%r10 # Clear sensitive data from register
	ret
	.cfi_endproc
	.size OPENSSL_ia32_${rdop}_bytes,.-OPENSSL_ia32_${rdop}_bytes
	___
	}
	gen_random("rdrand");
	gen_random("rdseed");

	close STDOUT or die "error closing STDOUT: $!"; # flush