From: Luke Kenneth Casson Leighton Date: Sat, 23 Sep 2023 15:00:05 +0000 (+0100) Subject: provide intercepts of 64/128-bit math primitives that still look X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fe188d6f9e5624f4a4c1b8cc4ab0cfbf097d0f7a;p=openpower-isa.git provide intercepts of 64/128-bit math primitives that still look like poly1305-donna-64bit.h --- diff --git a/src/openpower/decoder/isa/poly1305-donna.py b/src/openpower/decoder/isa/poly1305-donna.py index e76231b5..8149f590 100644 --- a/src/openpower/decoder/isa/poly1305-donna.py +++ b/src/openpower/decoder/isa/poly1305-donna.py @@ -12,11 +12,11 @@ poly1305_block_size = 16 mask128 = (1<<128)-1 mask64 = (1<<64)-1 -def MUL(x, y): out = (x&mask64) * (y&mask64); print("mul %x*%x=%x" % (x, y, out)); return out -def ADD(out, i): return (out + i) -def ADDLO(out, i): return (out + (i & mask64)) -def SHR(i, shift): out = (i >> shift) & mask64; print("shr %x>>%d=%x mask %x" % (i,shift,out,mask64)); return out -def LO(i): return i & mask64 +def _MUL(x, y): out = (x&mask64) * (y&mask64); print("mul %x*%x=%x" % (x, y, out)); return out +def _ADD(out, i): return (out + i) +def _ADDLO(out, i): return (out + (i & mask64)) +def _SHR(i, shift): out = (i >> shift) & mask64; print("shr %x>>%d=%x mask %x" % (i,shift,out,mask64)); return out +def _LO(i): return i & mask64 # this function is extracted from bigint_cases.py (should be in a library) @@ -39,6 +39,14 @@ class Poly1305Donna(object): P = 0x3fffffffffffffffffffffffffffffffb # 2^130-5 + # suite of primitives (128-bit and 64-bit) which can be intercepted + # here in order to analyse carry-roll-over + def MUL(self, x, y): return _MUL(x, y) + def ADD(self, out, i): return _ADD(out, i) + def ADDLO(self, out, i): return _ADDLO(out, i) + def SHR(self, i, shift): return _SHR(i, shift) + def LO(self, i): return _LO(i) + @staticmethod def le_bytes_to_num(data): """Convert a number from little endian byte format""" @@ -92,6 +100,11 @@ class Poly1305Donna(object): self.final = 0 def poly1305_blocks(self, m): + + # get local-names for math-primitives to look like poly1305-donna-64.h + MUL, ADD, ADDLO, SHR, LO = \ + self.MUL, self.ADD, self.ADDLO, self.SHR, self.LO + hibit = 0 if self.final else 1 << 40 # 1 << 128 #unsigned long long r0,r1,r2; #unsigned long long s1,s2; @@ -152,6 +165,11 @@ class Poly1305Donna(object): self.h[2] = h2; def poly1305_finish(self): + + # get local-names for math-primitives to look like poly1305-donna-64.h + MUL, ADD, ADDLO, SHR, LO = \ + self.MUL, self.ADD, self.ADDLO, self.SHR, self.LO + #unsigned long long h0,h1,h2,c; #unsigned long long g0,g1,g2; #unsigned long long t0,t1;