ref: 6386a0391a11fd3c5216dfe1478fda08ae8bccbc
dir: /sys/src/libsec/386/sha1block.s/
TEXT _sha1block+0(SB),$352 /* x = (wp[off-f] ^ wp[off-8] ^ wp[off-14] ^ wp[off-16]) <<< 1; * wp[off] = x; * x += A <<< 5; * E += 0xca62c1d6 + x; * x = FN(B,C,D); * E += x; * B >>> 2 */ #define BSWAPDI BYTE $0x0f; BYTE $0xcf; #define BODY(off,FN,V,A,B,C,D,E)\ MOVL (off-64)(BP),DI;\ XORL (off-56)(BP),DI;\ XORL (off-32)(BP),DI;\ XORL (off-12)(BP),DI;\ ROLL $1,DI;\ MOVL DI,off(BP);\ LEAL V(DI)(E*1),E;\ MOVL A,DI;\ ROLL $5,DI;\ ADDL DI,E;\ FN(B,C,D)\ ADDL DI,E;\ RORL $2,B;\ #define BODY0(off,FN,V,A,B,C,D,E)\ MOVL off(BX),DI;\ BSWAPDI;\ MOVL DI,off(BP);\ LEAL V(DI)(E*1),E;\ MOVL A,DI;\ ROLL $5,DI;\ ADDL DI,E;\ FN(B,C,D)\ ADDL DI,E;\ RORL $2,B;\ /* * fn1 = (((C^D)&B)^D); */ #define FN1(B,C,D)\ MOVL C,DI;\ XORL D,DI;\ ANDL B,DI;\ XORL D,DI;\ /* * fn24 = B ^ C ^ D */ #define FN24(B,C,D)\ MOVL B,DI;\ XORL C,DI;\ XORL D,DI;\ /* * fn3 = ((B ^ C) & (D ^= B)) ^ B * D ^= B to restore D */ #define FN3(B,C,D)\ MOVL B,DI;\ XORL C,DI;\ XORL B,D;\ ANDL D,DI;\ XORL B,DI;\ XORL B,D;\ /* * stack offsets * void sha1block(uchar *DATA, int LEN, ulong *STATE) */ #define DATA 0 #define LEN 4 #define STATE 8 /* * stack offsets for locals * ulong w[80]; * uchar *edata; * ulong *w15, *w40, *w60, *w80; * register local * ulong *wp = BP * ulong a = eax, b = ebx, c = ecx, d = edx, e = esi * ulong tmp = edi */ #define WARRAY (-4-(80*4)) #define TMP1 (-8-(80*4)) #define TMP2 (-12-(80*4)) #define W15 (-16-(80*4)) #define W40 (-20-(80*4)) #define W60 (-24-(80*4)) #define W80 (-28-(80*4)) #define EDATA (-32-(80*4)) MOVL data+DATA(FP),AX ADDL len+LEN(FP),AX MOVL AX,edata+EDATA(SP) LEAL aw15+(WARRAY+15*4)(SP),DI MOVL DI,w15+W15(SP) LEAL aw40+(WARRAY+40*4)(SP),DX MOVL DX,w40+W40(SP) LEAL aw60+(WARRAY+60*4)(SP),CX MOVL CX,w60+W60(SP) LEAL aw80+(WARRAY+80*4)(SP),DI MOVL DI,w80+W80(SP) mainloop: LEAL warray+WARRAY(SP),BP MOVL state+STATE(FP),DI MOVL (DI),AX MOVL 4(DI),BX MOVL BX,tmp1+TMP1(SP) MOVL 8(DI),CX MOVL 12(DI),DX MOVL 16(DI),SI MOVL data+DATA(FP),BX loop1: BODY0(0,FN1,0x5a827999,AX,tmp1+TMP1(SP),CX,DX,SI) MOVL SI,tmp2+TMP2(SP) BODY0(4,FN1,0x5a827999,SI,AX,tmp1+TMP1(SP),CX,DX) MOVL tmp1+TMP1(SP),SI BODY0(8,FN1,0x5a827999,DX,tmp2+TMP2(SP),AX,SI,CX) BODY0(12,FN1,0x5a827999,CX,DX,tmp2+TMP2(SP),AX,SI) MOVL SI,tmp1+TMP1(SP) BODY0(16,FN1,0x5a827999,SI,CX,DX,tmp2+TMP2(SP),AX) MOVL tmp2+TMP2(SP),SI ADDL $20,BX ADDL $20,BP CMPL BP,w15+W15(SP) JCS loop1 BODY0(0,FN1,0x5a827999,AX,tmp1+TMP1(SP),CX,DX,SI) ADDL $4,BX MOVL BX,data+DATA(FP) MOVL tmp1+TMP1(SP),BX BODY(4,FN1,0x5a827999,SI,AX,BX,CX,DX) BODY(8,FN1,0x5a827999,DX,SI,AX,BX,CX) BODY(12,FN1,0x5a827999,CX,DX,SI,AX,BX) BODY(16,FN1,0x5a827999,BX,CX,DX,SI,AX) ADDL $20,BP loop2: BODY(0,FN24,0x6ed9eba1,AX,BX,CX,DX,SI) BODY(4,FN24,0x6ed9eba1,SI,AX,BX,CX,DX) BODY(8,FN24,0x6ed9eba1,DX,SI,AX,BX,CX) BODY(12,FN24,0x6ed9eba1,CX,DX,SI,AX,BX) BODY(16,FN24,0x6ed9eba1,BX,CX,DX,SI,AX) ADDL $20,BP CMPL BP,w40+W40(SP) JCS loop2 loop3: BODY(0,FN3,0x8f1bbcdc,AX,BX,CX,DX,SI) BODY(4,FN3,0x8f1bbcdc,SI,AX,BX,CX,DX) BODY(8,FN3,0x8f1bbcdc,DX,SI,AX,BX,CX) BODY(12,FN3,0x8f1bbcdc,CX,DX,SI,AX,BX) BODY(16,FN3,0x8f1bbcdc,BX,CX,DX,SI,AX) ADDL $20,BP CMPL BP,w60+W60(SP) JCS loop3 loop4: BODY(0,FN24,0xca62c1d6,AX,BX,CX,DX,SI) BODY(4,FN24,0xca62c1d6,SI,AX,BX,CX,DX) BODY(8,FN24,0xca62c1d6,DX,SI,AX,BX,CX) BODY(12,FN24,0xca62c1d6,CX,DX,SI,AX,BX) BODY(16,FN24,0xca62c1d6,BX,CX,DX,SI,AX) ADDL $20,BP CMPL BP,w80+W80(SP) JCS loop4 MOVL state+STATE(FP),DI ADDL AX,0(DI) ADDL BX,4(DI) ADDL CX,8(DI) ADDL DX,12(DI) ADDL SI,16(DI) MOVL edata+EDATA(SP),DI CMPL data+DATA(FP),DI JCS mainloop RET END