diff options
Diffstat (limited to 'lib/libcrypto/bn/asm/x86/mul_add.pl')
-rw-r--r-- | lib/libcrypto/bn/asm/x86/mul_add.pl | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/lib/libcrypto/bn/asm/x86/mul_add.pl b/lib/libcrypto/bn/asm/x86/mul_add.pl new file mode 100644 index 00000000000..61830d3a906 --- /dev/null +++ b/lib/libcrypto/bn/asm/x86/mul_add.pl @@ -0,0 +1,87 @@ +#!/usr/local/bin/perl +# x86 assember + +sub bn_mul_add_words + { + local($name)=@_; + + &function_begin($name,""); + + &comment(""); + $Low="eax"; + $High="edx"; + $a="ebx"; + $w="ebp"; + $r="edi"; + $c="esi"; + + &xor($c,$c); # clear carry + &mov($r,&wparam(0)); # + + &mov("ecx",&wparam(2)); # + &mov($a,&wparam(1)); # + + &and("ecx",0xfffffff8); # num / 8 + &mov($w,&wparam(3)); # + + &push("ecx"); # Up the stack for a tmp variable + + &jz(&label("maw_finish")); + + &set_label("maw_loop",0); + + &mov(&swtmp(0),"ecx"); # + + for ($i=0; $i<32; $i+=4) + { + &comment("Round $i"); + + &mov("eax",&DWP($i,$a,"",0)); # *a + &mul($w); # *a * w + &add("eax",$c); # L(t)+= *r + &mov($c,&DWP($i,$r,"",0)); # L(t)+= *r + &adc("edx",0); # H(t)+=carry + &add("eax",$c); # L(t)+=c + &adc("edx",0); # H(t)+=carry + &mov(&DWP($i,$r,"",0),"eax"); # *r= L(t); + &mov($c,"edx"); # c= H(t); + } + + &comment(""); + &mov("ecx",&swtmp(0)); # + &add($a,32); + &add($r,32); + &sub("ecx",8); + &jnz(&label("maw_loop")); + + &set_label("maw_finish",0); + &mov("ecx",&wparam(2)); # get num + &and("ecx",7); + &jnz(&label("maw_finish2")); # helps branch prediction + &jmp(&label("maw_end")); + + &set_label("maw_finish2",1); + for ($i=0; $i<7; $i++) + { + &comment("Tail Round $i"); + &mov("eax",&DWP($i*4,$a,"",0));# *a + &mul($w); # *a * w + &add("eax",$c); # L(t)+=c + &mov($c,&DWP($i*4,$r,"",0)); # L(t)+= *r + &adc("edx",0); # H(t)+=carry + &add("eax",$c); + &adc("edx",0); # H(t)+=carry + &dec("ecx") if ($i != 7-1); + &mov(&DWP($i*4,$r,"",0),"eax"); # *r= L(t); + &mov($c,"edx"); # c= H(t); + &jz(&label("maw_end")) if ($i != 7-1); + } + &set_label("maw_end",0); + &mov("eax",$c); + + &pop("ecx"); # clear variable from + + &function_end($name); + } + +1; |