diff options
Diffstat (limited to 'src/crypto/bn/asm/x86_64-mont5.pl')
| -rw-r--r-- | src/crypto/bn/asm/x86_64-mont5.pl | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/src/crypto/bn/asm/x86_64-mont5.pl b/src/crypto/bn/asm/x86_64-mont5.pl index 38def07..3c5a8fc 100644 --- a/src/crypto/bn/asm/x86_64-mont5.pl +++ b/src/crypto/bn/asm/x86_64-mont5.pl @@ -1770,6 +1770,15 @@ sqr8x_reduction: .align 32 .L8x_tail_done: add (%rdx),%r8 # can this overflow? + adc \$0,%r9 + adc \$0,%r10 + adc \$0,%r11 + adc \$0,%r12 + adc \$0,%r13 + adc \$0,%r14 + adc \$0,%r15 # can't overflow, because we + # started with "overhung" part + # of multiplication xor %rax,%rax neg $carry @@ -3116,6 +3125,15 @@ sqrx8x_reduction: .align 32 .Lsqrx8x_tail_done: add 24+8(%rsp),%r8 # can this overflow? + adc \$0,%r9 + adc \$0,%r10 + adc \$0,%r11 + adc \$0,%r12 + adc \$0,%r13 + adc \$0,%r14 + adc \$0,%r15 # can't overflow, because we + # started with "overhung" part + # of multiplication mov $carry,%rax # xor %rax,%rax sub 16+8(%rsp),$carry # mov 16(%rsp),%cf @@ -3159,13 +3177,11 @@ my ($rptr,$nptr)=("%rdx","%rbp"); my @ri=map("%r$_",(10..13)); my @ni=map("%r$_",(14..15)); $code.=<<___; - xor %rbx,%rbx + xor %ebx,%ebx sub %r15,%rsi # compare top-most words adc %rbx,%rbx mov %rcx,%r10 # -$num - .byte 0x67 or %rbx,%rax - .byte 0x67 mov %rcx,%r9 # -$num xor \$1,%rax sar \$3+2,%rcx # cf=0 |