*** empty log message ***

Rev: nettle/x86/sha1-f2.nlms:1.1

diff --git a/x86/sha1-f2.nlms b/x86/sha1-f2.nlms
new file mode 100644 (file)
index 0000000..2eb6ed6
--- /dev/null
+++ b/x86/sha1-f2.nlms
@@ -0,0 +1,76 @@
+/* The f2 phase of sha1 */
+/* !!! arch x86_32 */
+/* !!! signature n */
+/* !!! count 0 mod 5 */
+
+/* Run with loopmix -f -s -m -i sha1-f2.nlms */
+
+/* Current version can be loop-mixed down to 31 cycles. */
+define(`SA',`%eax')
+define(`SB',`%ebx')
+define(`SC',`%ecx')
+define(`SD',`%edx')
+define(`SE',`%ebp')
+define(`DATA',`%esp')
+define(`TMP',`%edi')
+dnl define(`TMP2',`%esi')
+define(`KVALUE',`%esi')
+
+define(`COUNT', `84(%esp)')
+
+dnl Expands to 4*i, or to the empty string if i is zero
+define(`OFFSET', `ifelse($1,0,,eval(4*$1))')
+
+dnl ROUND(a, b, c, d, e, i)
+define(`ROUND', `
+       mov     OFFSET(eval($6 % 16)) (DATA), TMP
+       xor     OFFSET(eval(($6 +  2) % 16)) (DATA), TMP
+       xor     OFFSET(eval(($6 +  8) % 16)) (DATA), TMP
+       xor     OFFSET(eval(($6 + 13) % 16)) (DATA), TMP
+       rol     `$'1, TMP
+       mov     TMP, OFFSET(eval($6 % 16)) (DATA)
+
+       add     KVALUE, $5
+       add     TMP, $5
+
+       mov     $2, TMP
+       xor     $3, TMP
+       xor     $4, TMP
+       add     TMP, $5
+
+       mov     $1, TMP
+       rol     `$'5, TMP
+       add     TMP, $5
+
+       rol     `$'30, $2
+')
+
+.text
+.p2align 4,15
+.globl loop_entry
+loop_entry:
+       push    %ebx            
+       push    %ebp            
+       push    %esi            
+       push    %edi            
+
+       sub     $64, %esp
+
+.align 32
+loop_begin:
+       ROUND(SA, SB, SC, SD, SE, 20)
+       ROUND(SE, SA, SB, SC, SD, 21)
+       ROUND(SD, SE, SA, SB, SC, 22)
+       ROUND(SC, SD, SE, SA, SB, 23)
+       ROUND(SB, SC, SD, SE, SA, 24)
+       sub       $5, COUNT
+       jnz       loop_begin
+
+loop_end:
+       add     $64, %esp
+       pop     %edi
+       pop     %esi
+       pop     %ebp
+       pop     %ebx
+       ret
+