Implementation notes: amd64, cryptothinkx, crypto_encrypt/ntruees593ep1

Computer: cryptothinkx
Architecture: amd64
CPU ID: GenuineIntel-00040651-bfebfbff
SUPERCOP version: 20170105
Operation: crypto_encrypt
Primitive: ntruees593ep1

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
181215	? ? ?	? ? ?	`ref`	`clang_-O3_-fwrapv_-march=native_-fomit-frame-pointer_-Qunused-arguments`	20170216	20170105
181296	? ? ?	? ? ?	`ref`	`clang_-march=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments`	20170216	20170105
183021	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx2_-O3_-fomit-frame-pointer`	20170216	20170105
184449	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=native_-mtune=native_-O3_-fomit-frame-pointer`	20170216	20170105
185958	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv`	20170216	20170105
190236	? ? ?	? ? ?	`ref`	`clang_-O3_-fwrapv_-mavx_-maes_-mpclmul_-fomit-frame-pointer_-Qunused-arguments`	20170216	20170105
194025	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx2_-O2_-fomit-frame-pointer`	20170216	20170105
194913	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv`	20170216	20170105
195336	? ? ?	? ? ?	`ref`	`clang_-O3_-fwrapv_-mavx_-fomit-frame-pointer_-Qunused-arguments`	20170216	20170105
195801	? ? ?	? ? ?	`ref`	`clang_-O3_-fwrapv_-march=x86-64_-mcpu=core-avx2_-mavx2_-maes_-mpclmul_-fomit-frame-pointer_-Qunused-arguments`	20170216	20170105
197433	? ? ?	? ? ?	`ref`	`clang_-O3_-fwrapv_-mavx2_-fomit-frame-pointer_-Qunused-arguments`	20170216	20170105
198177	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=native_-mtune=native_-O_-fomit-frame-pointer`	20170216	20170105
198780	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7_-O3_-fomit-frame-pointer`	20170216	20170105
198891	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx-i_-O3_-fomit-frame-pointer`	20170216	20170105
199083	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7-avx_-O3_-fomit-frame-pointer`	20170216	20170105
199608	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4.1_-O3_-fomit-frame-pointer`	20170216	20170105
199614	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx2_-O_-fomit-frame-pointer`	20170216	20170105
199680	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4_-O3_-fomit-frame-pointer`	20170216	20170105
199917	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-O3_-fomit-frame-pointer`	20170216	20170105
200535	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=native_-mtune=native_-O2_-fomit-frame-pointer`	20170216	20170105
200871	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv`	20170216	20170105
210669	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7_-O2_-fomit-frame-pointer`	20170216	20170105
210840	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7-avx_-O2_-fomit-frame-pointer`	20170216	20170105
211032	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4_-O2_-fomit-frame-pointer`	20170216	20170105
211647	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-O2_-fomit-frame-pointer`	20170216	20170105
211887	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4.1_-O2_-fomit-frame-pointer`	20170216	20170105
214242	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4_-O_-fomit-frame-pointer`	20170216	20170105
215307	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx-i_-O_-fomit-frame-pointer`	20170216	20170105
215436	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-O_-fomit-frame-pointer`	20170216	20170105
216126	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7_-O_-fomit-frame-pointer`	20170216	20170105
222294	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7-avx_-O_-fomit-frame-pointer`	20170216	20170105
225696	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx-i_-O2_-fomit-frame-pointer`	20170216	20170105
233757	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-O3_-fomit-frame-pointer`	20170216	20170105
233796	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=k8_-O3_-fomit-frame-pointer`	20170216	20170105
233826	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-fno-schedule-insns_-O3_-fomit-frame-pointer`	20170216	20170105
234009	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=k8_-O3_-fomit-frame-pointer`	20170216	20170105
234024	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=barcelona_-O3_-fomit-frame-pointer`	20170216	20170105
234324	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-O3_-fomit-frame-pointer`	20170216	20170105
234402	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=barcelona_-O3_-fomit-frame-pointer`	20170216	20170105
236946	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-O3_-fomit-frame-pointer`	20170216	20170105
237225	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-O3_-fomit-frame-pointer`	20170216	20170105
237789	? ? ?	? ? ?	`ref`	`gcc_-march=barcelona_-O3_-fomit-frame-pointer`	20170216	20170105
238026	? ? ?	? ? ?	`ref`	`gcc_-O3_-fomit-frame-pointer`	20170216	20170105
238131	? ? ?	? ? ?	`ref`	`gcc_-fno-schedule-insns_-O3_-fomit-frame-pointer`	20170216	20170105
238374	? ? ?	? ? ?	`ref`	`gcc_-m64_-O3_-fomit-frame-pointer`	20170216	20170105
238572	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=nocona_-O3_-fomit-frame-pointer`	20170216	20170105
238767	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=nocona_-O3_-fomit-frame-pointer`	20170216	20170105
238974	? ? ?	? ? ?	`ref`	`gcc_-march=k8_-O3_-fomit-frame-pointer`	20170216	20170105
239406	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=k8_-O3_-fomit-frame-pointer`	20170216	20170105
240663	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=native_-mtune=native_-Os_-fomit-frame-pointer`	20170216	20170105
241809	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx2_-Os_-fomit-frame-pointer`	20170216	20170105
243108	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv`	20170216	20170105
243891	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=nocona_-O3_-fomit-frame-pointer`	20170216	20170105
243992	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4.1_-O_-fomit-frame-pointer`	20170216	20170105
244065	? ? ?	? ? ?	`ref`	`gcc_-march=nocona_-O3_-fomit-frame-pointer`	20170216	20170105
245073	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-O_-fomit-frame-pointer`	20170216	20170105
245139	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-O_-fomit-frame-pointer`	20170216	20170105
245712	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=barcelona_-O2_-fomit-frame-pointer`	20170216	20170105
246081	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=barcelona_-O2_-fomit-frame-pointer`	20170216	20170105
246138	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=barcelona_-O_-fomit-frame-pointer`	20170216	20170105
246219	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=k8_-O2_-fomit-frame-pointer`	20170216	20170105
246339	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=barcelona_-O_-fomit-frame-pointer`	20170216	20170105
246792	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-O2_-fomit-frame-pointer`	20170216	20170105
247026	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7-avx_-Os_-fomit-frame-pointer`	20170216	20170105
247284	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-fno-schedule-insns_-O2_-fomit-frame-pointer`	20170216	20170105
247500	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx-i_-Os_-fomit-frame-pointer`	20170216	20170105
247794	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7_-Os_-fomit-frame-pointer`	20170216	20170105
248424	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4_-Os_-fomit-frame-pointer`	20170216	20170105
248601	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4.1_-Os_-fomit-frame-pointer`	20170216	20170105
249228	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=nocona_-O2_-fomit-frame-pointer`	20170216	20170105
249387	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-Os_-fomit-frame-pointer`	20170216	20170105
252555	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=k8_-O_-fomit-frame-pointer`	20170216	20170105
257787	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=nocona_-O_-fomit-frame-pointer`	20170216	20170105
259488	? ? ?	? ? ?	`ref`	`gcc_-O2_-fomit-frame-pointer`	20170216	20170105
259536	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-O2_-fomit-frame-pointer`	20170216	20170105
260001	? ? ?	? ? ?	`ref`	`gcc_-march=barcelona_-O2_-fomit-frame-pointer`	20170216	20170105
260022	? ? ?	? ? ?	`ref`	`gcc_-m64_-O2_-fomit-frame-pointer`	20170216	20170105
260091	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-O2_-fomit-frame-pointer`	20170216	20170105
260202	? ? ?	? ? ?	`ref`	`gcc_-fno-schedule-insns_-O2_-fomit-frame-pointer`	20170216	20170105
261750	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-fno-schedule-insns_-O_-fomit-frame-pointer`	20170216	20170105
262218	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=k8_-O2_-fomit-frame-pointer`	20170216	20170105
263352	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-O_-fomit-frame-pointer`	20170216	20170105
264330	? ? ?	? ? ?	`ref`	`gcc_-march=barcelona_-O_-fomit-frame-pointer`	20170216	20170105
265782	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=nocona_-O_-fomit-frame-pointer`	20170216	20170105
266586	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=nocona_-O2_-fomit-frame-pointer`	20170216	20170105
266664	? ? ?	? ? ?	`ref`	`gcc_-march=k8_-O_-fomit-frame-pointer`	20170216	20170105
267468	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=k8_-O_-fomit-frame-pointer`	20170216	20170105
267540	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=nocona_-O2_-fomit-frame-pointer`	20170216	20170105
269916	? ? ?	? ? ?	`ref`	`gcc_-march=nocona_-O_-fomit-frame-pointer`	20170216	20170105
270072	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=nocona_-O_-fomit-frame-pointer`	20170216	20170105
270186	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=k8_-O_-fomit-frame-pointer`	20170216	20170105
270396	? ? ?	? ? ?	`ref`	`gcc_-m64_-O_-fomit-frame-pointer`	20170216	20170105
270534	? ? ?	? ? ?	`ref`	`gcc_-O_-fomit-frame-pointer`	20170216	20170105
277041	? ? ?	? ? ?	`ref`	`gcc_-march=nocona_-O2_-fomit-frame-pointer`	20170216	20170105
278031	? ? ?	? ? ?	`ref`	`gcc_-march=k8_-O2_-fomit-frame-pointer`	20170216	20170105
279258	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=k8_-O2_-fomit-frame-pointer`	20170216	20170105
279804	? ? ?	? ? ?	`ref`	`gcc_-fno-schedule-insns_-O_-fomit-frame-pointer`	20170216	20170105
284740	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-O2_-fomit-frame-pointer`	20170216	20170105
292041	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-O_-fomit-frame-pointer`	20170216	20170105
297501	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=nocona_-Os_-fomit-frame-pointer`	20170216	20170105
297873	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-Os_-fomit-frame-pointer`	20170216	20170105
297906	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=k8_-Os_-fomit-frame-pointer`	20170216	20170105
297960	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-Os_-fomit-frame-pointer`	20170216	20170105
299013	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-fno-schedule-insns_-Os_-fomit-frame-pointer`	20170216	20170105
300600	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=nocona_-Os_-fomit-frame-pointer`	20170216	20170105
303006	? ? ?	? ? ?	`ref`	`gcc_-fno-schedule-insns_-Os_-fomit-frame-pointer`	20170216	20170105
303105	? ? ?	? ? ?	`ref`	`gcc_-march=barcelona_-Os_-fomit-frame-pointer`	20170216	20170105
303177	? ? ?	? ? ?	`ref`	`gcc_-m64_-Os_-fomit-frame-pointer`	20170216	20170105
303357	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-Os_-fomit-frame-pointer`	20170216	20170105
303702	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=k8_-Os_-fomit-frame-pointer`	20170216	20170105
305706	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=k8_-Os_-fomit-frame-pointer`	20170216	20170105
312345	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-Os_-fomit-frame-pointer`	20170216	20170105
318675	? ? ?	? ? ?	`ref`	`clang_-mcpu=cortex-a8_-mfpu=neon_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments`	20170216	20170105
318777	? ? ?	? ? ?	`ref`	`gcc_-march=nocona_-Os_-fomit-frame-pointer`	20170216	20170105
319962	? ? ?	? ? ?	`ref`	`clang_-mcpu=native_-mfpu=neon_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments`	20170216	20170105
327243	? ? ?	? ? ?	`ref`	`clang_-O3_-fomit-frame-pointer_-Qunused-arguments`	20170216	20170105
327330	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=barcelona_-Os_-fomit-frame-pointer`	20170216	20170105
331344	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=barcelona_-Os_-fomit-frame-pointer`	20170216	20170105
333090	? ? ?	? ? ?	`ref`	`gcc_-Os_-fomit-frame-pointer`	20170216	20170105
338616	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=nocona_-Os_-fomit-frame-pointer`	20170216	20170105
346479	? ? ?	? ? ?	`ref`	`gcc_-march=k8_-Os_-fomit-frame-pointer`	20170216	20170105
363976	? ? ?	? ? ?	`ref`	`clang_-mcpu=cortex-a9_-mfpu=neon_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments`	20170216	20170105
709152	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops`	20170216	20170105
732627	? ? ?	? ? ?	`ref`	`gcc`	20170216	20170105
824793	? ? ?	? ? ?	`ref`	`cc`	20170216	20170105

Compiler output

Implementation: crypto_encrypt/ntruees593ep1/ref
Compiler: clang -O3 -fomit-frame-pointer -Qunused-arguments

ntru_crypto_sha1.c: ntru_crypto_sha1.c:85:33: warning: '&' within '^' [-Wbitwise-op-parentheses]
ntru_crypto_sha1.c: E += RL(A, 5) + K00_19 + (B & (C ^ D) ^ D) + data[ 0]; B = RL(B, 30);
ntru_crypto_sha1.c: ~~^~~~~~~~~ ~
ntru_crypto_sha1.c: ntru_crypto_sha1.c:85:33: note: place parentheses around the '&' expression to silence this warning
ntru_crypto_sha1.c: E += RL(A, 5) + K00_19 + (B & (C ^ D) ^ D) + data[ 0]; B = RL(B, 30);
ntru_crypto_sha1.c: ^
ntru_crypto_sha1.c: ( )
ntru_crypto_sha1.c: ntru_crypto_sha1.c:86:33: warning: '&' within '^' [-Wbitwise-op-parentheses]
ntru_crypto_sha1.c: D += RL(E, 5) + K00_19 + (A & (B ^ C) ^ C) + data[ 1]; A = RL(A, 30);
ntru_crypto_sha1.c: ~~^~~~~~~~~ ~
ntru_crypto_sha1.c: ...
ntru_crypto_sha1.c: ^
ntru_crypto_sha1.c: ( )
ntru_crypto_sha1.c: ntru_crypto_sha1.c:111:33: warning: '&' within '^' [-Wbitwise-op-parentheses]
ntru_crypto_sha1.c: A += RL(B, 5) + K00_19 + (C & (D ^ E) ^ E) + w[ 3]; C = RL(C, 30);
ntru_crypto_sha1.c: ~~^~~~~~~~~ ~
ntru_crypto_sha1.c: ntru_crypto_sha1.c:111:33: note: place parentheses around the '&' expression to silence this warning
ntru_crypto_sha1.c: A += RL(B, 5) + K00_19 + (C & (D ^ E) ^ E) + w[ 3]; C = RL(C, 30);
ntru_crypto_sha1.c: ^
ntru_crypto_sha1.c: ( )
ntru_crypto_sha1.c: 20 warnings generated.
ntru_crypto_sha2.c: ntru_crypto_sha2.c:90:21: warning: '&' within '^' [-Wbitwise-op-parentheses]
ntru_crypto_sha2.c: H += S1(E) + (E & (F ^ G) ^ G) + 0x428A2F98UL + data[ 0]; D += H;
ntru_crypto_sha2.c: ~~^~~~~~~~~ ~
ntru_crypto_sha2.c: ntru_crypto_sha2.c:90:21: note: place parentheses around the '&' expression to silence this warning
ntru_crypto_sha2.c: H += S1(E) + (E & (F ^ G) ^ G) + 0x428A2F98UL + data[ 0]; D += H;
ntru_crypto_sha2.c: ^
ntru_crypto_sha2.c: ( )
ntru_crypto_sha2.c: ntru_crypto_sha2.c:92:21: warning: '&' within '^' [-Wbitwise-op-parentheses]
ntru_crypto_sha2.c: G += S1(D) + (D & (E ^ F) ^ F) + 0x71374491UL + data[ 1]; C += G;
ntru_crypto_sha2.c: ~~^~~~~~~~~ ~
ntru_crypto_sha2.c: ...
ntru_crypto_sha2.c: ^
ntru_crypto_sha2.c: ( )
ntru_crypto_sha2.c: ntru_crypto_sha2.c:267:21: warning: '&' within '^' [-Wbitwise-op-parentheses]
ntru_crypto_sha2.c: A += S1(F) + (F & (G ^ H) ^ H) + 0xC67178F2UL + w[15]; E += A;
ntru_crypto_sha2.c: ~~^~~~~~~~~ ~
ntru_crypto_sha2.c: ntru_crypto_sha2.c:267:21: note: place parentheses around the '&' expression to silence this warning
ntru_crypto_sha2.c: A += S1(F) + (F & (G ^ H) ^ H) + 0xC67178F2UL + w[15]; E += A;
ntru_crypto_sha2.c: ^
ntru_crypto_sha2.c: ( )
ntru_crypto_sha2.c: 64 warnings generated.

Number of similar (compiler,implementation) pairs: 10, namely:

Compiler	Implementations
clang -O3 -fomit-frame-pointer -Qunused-arguments	ref
clang -O3 -fwrapv -march=native -fomit-frame-pointer -Qunused-arguments	ref
clang -O3 -fwrapv -march=x86-64 -mcpu=core-avx2 -mavx2 -maes -mpclmul -fomit-frame-pointer -Qunused-arguments	ref
clang -O3 -fwrapv -mavx2 -fomit-frame-pointer -Qunused-arguments	ref
clang -O3 -fwrapv -mavx -fomit-frame-pointer -Qunused-arguments	ref
clang -O3 -fwrapv -mavx -maes -mpclmul -fomit-frame-pointer -Qunused-arguments	ref
clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments	ref
clang -mcpu=cortex-a8 -mfpu=neon -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments	ref
clang -mcpu=cortex-a9 -mfpu=neon -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments	ref
clang -mcpu=native -mfpu=neon -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments	ref