diff options
Diffstat (limited to 'crypto/openssl/crypto/bn/asm/x86_64-mont.pl')
| -rwxr-xr-x | crypto/openssl/crypto/bn/asm/x86_64-mont.pl | 185 |
1 files changed, 107 insertions, 78 deletions
diff --git a/crypto/openssl/crypto/bn/asm/x86_64-mont.pl b/crypto/openssl/crypto/bn/asm/x86_64-mont.pl index 8fb6c99..044fd7e 100755 --- a/crypto/openssl/crypto/bn/asm/x86_64-mont.pl +++ b/crypto/openssl/crypto/bn/asm/x86_64-mont.pl @@ -97,6 +97,8 @@ $code=<<___; .type bn_mul_mont,\@function,6 .align 16 bn_mul_mont: + mov ${num}d,${num}d + mov %rsp,%rax test \$3,${num}d jnz .Lmul_enter cmp \$8,${num}d @@ -121,29 +123,36 @@ $code.=<<___; push %r14 push %r15 - mov ${num}d,${num}d - lea 2($num),%r10 + neg $num mov %rsp,%r11 - neg %r10 - lea (%rsp,%r10,8),%rsp # tp=alloca(8*(num+2)) - and \$-1024,%rsp # minimize TLB usage + lea -16(%rsp,$num,8),%r10 # future alloca(8*(num+2)) + neg $num # restore $num + and \$-1024,%r10 # minimize TLB usage - mov %r11,8(%rsp,$num,8) # tp[num+1]=%rsp -.Lmul_body: # Some OSes, *cough*-dows, insist on stack being "wired" to # physical memory in strictly sequential manner, i.e. if stack # allocation spans two pages, then reference to farmost one can # be punishable by SEGV. But page walking can do good even on # other OSes, because it guarantees that villain thread hits # the guard page before it can make damage to innocent one... - sub %rsp,%r11 + sub %r10,%r11 and \$-4096,%r11 + lea (%r10,%r11),%rsp + mov (%rsp),%r11 + cmp %r10,%rsp + ja .Lmul_page_walk + jmp .Lmul_page_walk_done + +.align 16 .Lmul_page_walk: - mov (%rsp,%r11),%r10 - sub \$4096,%r11 - .byte 0x66,0x2e # predict non-taken - jnc .Lmul_page_walk + lea -4096(%rsp),%rsp + mov (%rsp),%r11 + cmp %r10,%rsp + ja .Lmul_page_walk +.Lmul_page_walk_done: + mov %rax,8(%rsp,$num,8) # tp[num+1]=%rsp +.Lmul_body: mov $bp,%r12 # reassign $bp ___ $bp="%r12"; @@ -314,13 +323,13 @@ $code.=<<___; mov 8(%rsp,$num,8),%rsi # restore %rsp mov \$1,%rax - mov (%rsi),%r15 - mov 8(%rsi),%r14 - mov 16(%rsi),%r13 - mov 24(%rsi),%r12 - mov 32(%rsi),%rbp - mov 40(%rsi),%rbx - lea 48(%rsi),%rsp + mov -48(%rsi),%r15 + mov -40(%rsi),%r14 + mov -32(%rsi),%r13 + mov -24(%rsi),%r12 + mov -16(%rsi),%rbp + mov -8(%rsi),%rbx + lea (%rsi),%rsp .Lmul_epilogue: ret .size bn_mul_mont,.-bn_mul_mont @@ -332,6 +341,8 @@ $code.=<<___; .type bn_mul4x_mont,\@function,6 .align 16 bn_mul4x_mont: + mov ${num}d,${num}d + mov %rsp,%rax .Lmul4x_enter: ___ $code.=<<___ if ($addx); @@ -347,23 +358,29 @@ $code.=<<___; push %r14 push %r15 - mov ${num}d,${num}d - lea 4($num),%r10 + neg $num mov %rsp,%r11 - neg %r10 - lea (%rsp,%r10,8),%rsp # tp=alloca(8*(num+4)) - and \$-1024,%rsp # minimize TLB usage + lea -32(%rsp,$num,8),%r10 # future alloca(8*(num+4)) + neg $num # restore + and \$-1024,%r10 # minimize TLB usage - mov %r11,8(%rsp,$num,8) # tp[num+1]=%rsp -.Lmul4x_body: - sub %rsp,%r11 + sub %r10,%r11 and \$-4096,%r11 + lea (%r10,%r11),%rsp + mov (%rsp),%r11 + cmp %r10,%rsp + ja .Lmul4x_page_walk + jmp .Lmul4x_page_walk_done + .Lmul4x_page_walk: - mov (%rsp,%r11),%r10 - sub \$4096,%r11 - .byte 0x2e # predict non-taken - jnc .Lmul4x_page_walk + lea -4096(%rsp),%rsp + mov (%rsp),%r11 + cmp %r10,%rsp + ja .Lmul4x_page_walk +.Lmul4x_page_walk_done: + mov %rax,8(%rsp,$num,8) # tp[num+1]=%rsp +.Lmul4x_body: mov $rp,16(%rsp,$num,8) # tp[num+2]=$rp mov %rdx,%r12 # reassign $bp ___ @@ -742,13 +759,13 @@ ___ $code.=<<___; mov 8(%rsp,$num,8),%rsi # restore %rsp mov \$1,%rax - mov (%rsi),%r15 - mov 8(%rsi),%r14 - mov 16(%rsi),%r13 - mov 24(%rsi),%r12 - mov 32(%rsi),%rbp - mov 40(%rsi),%rbx - lea 48(%rsi),%rsp + mov -48(%rsi),%r15 + mov -40(%rsi),%r14 + mov -32(%rsi),%r13 + mov -24(%rsi),%r12 + mov -16(%rsi),%rbp + mov -8(%rsi),%rbx + lea (%rsi),%rsp .Lmul4x_epilogue: ret .size bn_mul4x_mont,.-bn_mul4x_mont @@ -778,14 +795,15 @@ $code.=<<___; .type bn_sqr8x_mont,\@function,6 .align 32 bn_sqr8x_mont: -.Lsqr8x_enter: mov %rsp,%rax +.Lsqr8x_enter: push %rbx push %rbp push %r12 push %r13 push %r14 push %r15 +.Lsqr8x_prologue: mov ${num}d,%r10d shl \$3,${num}d # convert $num to bytes @@ -798,33 +816,42 @@ bn_sqr8x_mont: # do its job. # lea -64(%rsp,$num,2),%r11 + mov %rsp,%rbp mov ($n0),$n0 # *n0 sub $aptr,%r11 and \$4095,%r11 cmp %r11,%r10 jb .Lsqr8x_sp_alt - sub %r11,%rsp # align with $aptr - lea -64(%rsp,$num,2),%rsp # alloca(frame+2*$num) + sub %r11,%rbp # align with $aptr + lea -64(%rbp,$num,2),%rbp # future alloca(frame+2*$num) jmp .Lsqr8x_sp_done .align 32 .Lsqr8x_sp_alt: lea 4096-64(,$num,2),%r10 # 4096-frame-2*$num - lea -64(%rsp,$num,2),%rsp # alloca(frame+2*$num) + lea -64(%rbp,$num,2),%rbp # future alloca(frame+2*$num) sub %r10,%r11 mov \$0,%r10 cmovc %r10,%r11 - sub %r11,%rsp + sub %r11,%rbp .Lsqr8x_sp_done: - and \$-64,%rsp - mov %rax,%r11 - sub %rsp,%r11 + and \$-64,%rbp + mov %rsp,%r11 + sub %rbp,%r11 and \$-4096,%r11 + lea (%rbp,%r11),%rsp + mov (%rsp),%r10 + cmp %rbp,%rsp + ja .Lsqr8x_page_walk + jmp .Lsqr8x_page_walk_done + +.align 16 .Lsqr8x_page_walk: - mov (%rsp,%r11),%r10 - sub \$4096,%r11 - .byte 0x2e # predict non-taken - jnc .Lsqr8x_page_walk + lea -4096(%rsp),%rsp + mov (%rsp),%r10 + cmp %rbp,%rsp + ja .Lsqr8x_page_walk +.Lsqr8x_page_walk_done: mov $num,%r10 neg $num @@ -948,30 +975,38 @@ $code.=<<___; .type bn_mulx4x_mont,\@function,6 .align 32 bn_mulx4x_mont: -.Lmulx4x_enter: mov %rsp,%rax +.Lmulx4x_enter: push %rbx push %rbp push %r12 push %r13 push %r14 push %r15 +.Lmulx4x_prologue: shl \$3,${num}d # convert $num to bytes - .byte 0x67 xor %r10,%r10 sub $num,%r10 # -$num mov ($n0),$n0 # *n0 - lea -72(%rsp,%r10),%rsp # alloca(frame+$num+8) - and \$-128,%rsp - mov %rax,%r11 - sub %rsp,%r11 + lea -72(%rsp,%r10),%rbp # future alloca(frame+$num+8) + and \$-128,%rbp + mov %rsp,%r11 + sub %rbp,%r11 and \$-4096,%r11 + lea (%rbp,%r11),%rsp + mov (%rsp),%r10 + cmp %rbp,%rsp + ja .Lmulx4x_page_walk + jmp .Lmulx4x_page_walk_done + +.align 16 .Lmulx4x_page_walk: - mov (%rsp,%r11),%r10 - sub \$4096,%r11 - .byte 0x66,0x2e # predict non-taken - jnc .Lmulx4x_page_walk + lea -4096(%rsp),%rsp + mov (%rsp),%r10 + cmp %rbp,%rsp + ja .Lmulx4x_page_walk +.Lmulx4x_page_walk_done: lea ($bp,$num),%r10 ############################################################## @@ -1332,22 +1367,8 @@ mul_handler: mov 192($context),%r10 # pull $num mov 8(%rax,%r10,8),%rax # pull saved stack pointer - lea 48(%rax),%rax - - mov -8(%rax),%rbx - mov -16(%rax),%rbp - mov -24(%rax),%r12 - mov -32(%rax),%r13 - mov -40(%rax),%r14 - mov -48(%rax),%r15 - mov %rbx,144($context) # restore context->Rbx - mov %rbp,160($context) # restore context->Rbp - mov %r12,216($context) # restore context->R12 - mov %r13,224($context) # restore context->R13 - mov %r14,232($context) # restore context->R14 - mov %r15,240($context) # restore context->R15 - jmp .Lcommon_seh_tail + jmp .Lcommon_pop_regs .size mul_handler,.-mul_handler .type sqr_handler,\@abi-omnipotent @@ -1375,15 +1396,21 @@ sqr_handler: cmp %r10,%rbx # context->Rip<.Lsqr_body jb .Lcommon_seh_tail + mov 4(%r11),%r10d # HandlerData[1] + lea (%rsi,%r10),%r10 # body label + cmp %r10,%rbx # context->Rip>=.Lsqr_epilogue + jb .Lcommon_pop_regs + mov 152($context),%rax # pull context->Rsp - mov 4(%r11),%r10d # HandlerData[1] + mov 8(%r11),%r10d # HandlerData[2] lea (%rsi,%r10),%r10 # epilogue label cmp %r10,%rbx # context->Rip>=.Lsqr_epilogue jae .Lcommon_seh_tail mov 40(%rax),%rax # pull saved stack pointer +.Lcommon_pop_regs: mov -8(%rax),%rbx mov -16(%rax),%rbp mov -24(%rax),%r12 @@ -1470,13 +1497,15 @@ $code.=<<___; .LSEH_info_bn_sqr8x_mont: .byte 9,0,0,0 .rva sqr_handler - .rva .Lsqr8x_body,.Lsqr8x_epilogue # HandlerData[] + .rva .Lsqr8x_prologue,.Lsqr8x_body,.Lsqr8x_epilogue # HandlerData[] +.align 8 ___ $code.=<<___ if ($addx); .LSEH_info_bn_mulx4x_mont: .byte 9,0,0,0 .rva sqr_handler - .rva .Lmulx4x_body,.Lmulx4x_epilogue # HandlerData[] + .rva .Lmulx4x_prologue,.Lmulx4x_body,.Lmulx4x_epilogue # HandlerData[] +.align 8 ___ } |
