1 files changed, 10 insertions, 13 deletions

diff --git a/src/lib/libcrypto/bn/asm/ppc.pl b/src/lib/libcrypto/bn/asm/ppc.pl
index 307c7ccb35..08e0053473 100644
--- a/src/lib/libcrypto/bn/asm/ppc.pl
+++ b/src/lib/libcrypto/bn/asm/ppc.pl
@@ -116,7 +116,7 @@ if ($opf =~ /32\.s/) {
         $UDIV=  "divwu";        # unsigned divide
         $UCMPI= "cmplwi";       # unsigned compare with immediate
         $UCMP=  "cmplw";        # unsigned compare
-        $COUNTZ="cntlzw";       # count leading zeros
+        $CNTLZ= "cntlzw";       # count leading zeros
         $SHL=   "slw";          # shift left
         $SHR=   "srw";          # unsigned shift right
         $SHRI=  "srwi";         # unsigned shift right by immediate     
@@ -124,6 +124,7 @@ if ($opf =~ /32\.s/) {
         $CLRU=  "clrlwi";       # clear upper bits
         $INSR=  "insrwi";       # insert right
         $ROTL=  "rotlwi";       # rotate left by immediate
+        $TR=    "tw";           # conditional trap
 } elsif ($opf =~ /64\.s/) {
         $BITS=  64;
         $BNSZ=  $BITS/8;
@@ -139,7 +140,7 @@ if ($opf =~ /32\.s/) {
         $UDIV=  "divdu";        # unsigned divide
         $UCMPI= "cmpldi";       # unsigned compare with immediate
         $UCMP=  "cmpld";        # unsigned compare
-        $COUNTZ="cntlzd";       # count leading zeros
+        $CNTLZ= "cntlzd";       # count leading zeros
         $SHL=   "sld";          # shift left
         $SHR=   "srd";          # unsigned shift right
         $SHRI=  "srdi";         # unsigned shift right by immediate     
@@ -147,6 +148,7 @@ if ($opf =~ /32\.s/) {
         $CLRU=  "clrldi";       # clear upper bits
         $INSR=  "insrdi";       # insert right 
         $ROTL=  "rotldi";       # rotate left by immediate
+        $TR=    "td";           # conditional trap
 } else { die "nonsense $opf"; }
 
 ( defined shift || open STDOUT,">$opf" ) || die "can't open $opf: $!";
@@ -1710,17 +1712,12 @@ Lppcasm_add_adios:
         bclr    BO_ALWAYS,CR0_LT        
 Lppcasm_div1:
         xor     r0,r0,r0                #r0=0
-        $COUNTZ r7,r5                   #r7 = num leading 0s in d.
-        subfic  r8,r7,$BITS             #r8 = BN_num_bits_word(d)
-        cmpi    0,0,r8,$BITS            #
-        bc      BO_IF,CR0_EQ,Lppcasm_div2       #proceed if (r8==$BITS) 
-        li      r9,1                    # r9=1
-        $SHL    r10,r9,r8               # r9<<=r8
-        $UCMP   0,r3,r10                #       
-        bc      BO_IF,CR0_GT,Lppcasm_div2       #or if (h > (1<<r8))
-        $UDIV   r3,r3,r0                #if not assert(0) divide by 0!
-                                        #that's how we signal overflow
-        bclr    BO_ALWAYS,CR0_LT        #return. NEVER REACHED.
+        li      r8,$BITS
+        $CNTLZ. r7,r5                   #r7 = num leading 0s in d.
+        bc      BO_IF,CR0_EQ,Lppcasm_div2       #proceed if no leading zeros
+        subf    r8,r7,r8                #r8 = BN_num_bits_word(d)
+        $SHR.   r9,r3,r8                #are there any bits above r8'th?
+        $TR     16,r9,r0                #if there're, signal to dump core...
 Lppcasm_div2:
         $UCMP   0,r3,r5                 #h>=d?
         bc      BO_IF,CR0_LT,Lppcasm_div3       #goto Lppcasm_div3 if not