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#!/usr/bin/env perl
$output=shift;
$masm=1 if ($output =~ /\.asm/);
open STDOUT,">$output" || die "can't open $output: $!";
print<<___ if(defined($masm));
_TEXT SEGMENT
PUBLIC OPENSSL_rdtsc
PUBLIC OPENSSL_atomic_add
ALIGN 16
OPENSSL_atomic_add PROC
mov eax,DWORD PTR[rcx]
\$Lspin: lea r8,DWORD PTR[rdx+rax]
lock cmpxchg DWORD PTR[rcx],r8d
jne \$Lspin
mov eax,r8d
cdqe
ret
OPENSSL_atomic_add ENDP
PUBLIC OPENSSL_wipe_cpu
ALIGN 16
OPENSSL_wipe_cpu PROC
pxor xmm0,xmm0
pxor xmm1,xmm1
pxor xmm2,xmm2
pxor xmm3,xmm3
pxor xmm4,xmm4
pxor xmm5,xmm5
xor rcx,rcx
xor rdx,rdx
xor r8,r8
xor r9,r9
xor r10,r10
xor r11,r11
lea rax,QWORD PTR[rsp+8]
ret
OPENSSL_wipe_cpu ENDP
_TEXT ENDS
CRT\$XIU SEGMENT
EXTRN OPENSSL_cpuid_setup:PROC
DQ OPENSSL_cpuid_setup
CRT\$XIU ENDS
___
print<<___ if(!defined($masm));
.text
.globl OPENSSL_atomic_add
.type OPENSSL_atomic_add,\@function
.align 16
OPENSSL_atomic_add:
movl (%rdi),%eax
.Lspin: leaq (%rsi,%rax),%r8
lock; cmpxchgl %r8d,(%rdi)
jne .Lspin
movl %r8d,%eax
.byte 0x48,0x98
ret
.size OPENSSL_atomic_add,.-OPENSSL_atomic_add
.globl OPENSSL_wipe_cpu
.type OPENSSL_wipe_cpu,\@function
.align 16
OPENSSL_wipe_cpu:
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
.size OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
.section .init
call OPENSSL_cpuid_setup
___
open STDOUT,"| $^X perlasm/x86_64-xlate.pl $output";
print<<___;
.text
.globl OPENSSL_rdtsc
.type OPENSSL_rdtsc,\@abi-omnipotent
.align 16
OPENSSL_rdtsc:
rdtsc
shl \$32,%rdx
or %rdx,%rax
ret
.size OPENSSL_rdtsc,.-OPENSSL_rdtsc
.globl OPENSSL_ia32_cpuid
.type OPENSSL_ia32_cpuid,\@abi-omnipotent
.align 16
OPENSSL_ia32_cpuid:
mov %rbx,%r8
xor %eax,%eax
cpuid
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
mov \$1,%eax
cpuid
cmp \$0,%r9d
jne .Lnotintel
or \$0x00100000,%edx # use reserved 20th bit to engage RC4_CHAR
and \$15,%ah
cmp \$15,%ah # examine Family ID
je .Lnotintel
or \$0x40000000,%edx # use reserved bit to skip unrolled loop
.Lnotintel:
bt \$28,%edx # test hyper-threading bit
jnc .Ldone
shr \$16,%ebx
cmp \$1,%bl # see if cache is shared
ja .Ldone
and \$0xefffffff,%edx # ~(1<<28)
.Ldone:
shl \$32,%rcx
mov %edx,%eax
mov %r8,%rbx
or %rcx,%rax
ret
.size OPENSSL_ia32_cpuid,.-OPENSSL_ia32_cpuid
___
close STDOUT; # flush
|
