Latest bn_mont.c modification broke ECDSA test. I've got math wrong, which

[openssl.git] / crypto / bn / asm / via-mont.pl

diff --git a/crypto/bn/asm/via-mont.pl b/crypto/bn/asm/via-mont.pl
index ce3cd61eb39c1f80e6372c4ae49c2ce21c7418a9..c046a514c873fb9e773384b635ac066883f5e565 100644 (file)
--- a/crypto/bn/asm/via-mont.pl
+++ b/crypto/bn/asm/via-mont.pl
@@ -187,17 +187,12 @@ $sp=&DWP(28,"esp");
        &data_byte(0xf3,0x0f,0xa6,0xc0);# rep montmul
 
        &mov    ("ecx","ebp");
-       &xor    ("edx","edx");                  # i=0
        &lea    ("esi",&DWP(64,"esp"));         # tp
        # edi still points at the end of padded np copy...
-       &mov    ("eax",&DWP(-4-$pad,"edi"));    # np[num-1]
        &neg    ("ebp");
        &lea    ("ebp",&DWP(-$pad,"edi","ebp",4));      # so just "rewind"
        &mov    ("edi",$rp);                    # restore rp
-
-       &shr    ("eax",30);                     # boundary condition...
-       &jz     (&label("copy"));               # ... is met
-       &xor    ("edx","edx");                  # clear CF
+       &xor    ("edx","edx");                  # i=0 and clear CF
 
 &set_label("sub",8);
        &mov    ("eax",&DWP(0,"esi","edx",4));