diff --git a/src/mont/fp_montgomery_reduce.c b/src/mont/fp_montgomery_reduce.c
index 6b180de..2279281 100644
--- a/src/mont/fp_montgomery_reduce.c
+++ b/src/mont/fp_montgomery_reduce.c
@@ -62,7 +62,7 @@ asm(                                                      \
    "movq %%rdx,%1 \n\t"                                   \
 :"=g"(_c[LO]), "=r"(cy)                                   \
 :"0"(_c[LO]), "1"(cy), "r"(mu), "r"(*tmpm++)              \
-: "%rax", "%rdx", "%cc")
+: "%rax", "%rdx", "cc")
 
 #define INNERMUL8 \
  asm(                  \
@@ -155,7 +155,7 @@ asm(                                                      \
  \
 :"=r"(_c), "=r"(cy)                    \
 : "0"(_c),  "1"(cy), "g"(mu), "r"(tmpm)\
-: "%rax", "%rdx", "%r10", "%r11", "%cc")
+: "%rax", "%rdx", "%r10", "%r11", "cc")
 
 
 #define PROPCARRY                           \
@@ -165,7 +165,7 @@ asm(                                        \
    "movzbq %%al,%1 \n\t"                    \
 :"=g"(_c[LO]), "=r"(cy)                     \
 :"0"(_c[LO]), "1"(cy)                       \
-: "%rax", "%cc")
+: "%rax", "cc")
 
 /******************************************************************/
 #elif defined(TFM_SSE2)
diff --git a/src/mul/fp_mul_comba.c b/src/mul/fp_mul_comba.c
index b96ce45..fe7d6f2 100644
--- a/src/mul/fp_mul_comba.c
+++ b/src/mul/fp_mul_comba.c
@@ -88,7 +88,7 @@ asm  (                                                    \
      "addq  %%rax,%0     \n\t"                            \
      "adcq  %%rdx,%1     \n\t"                            \
      "adcq  $0,%2        \n\t"                            \
-     :"=r"(c0), "=r"(c1), "=r"(c2): "0"(c0), "1"(c1), "2"(c2), "g"(i), "g"(j)  :"%rax","%rdx","%cc");
+     :"=r"(c0), "=r"(c1), "=r"(c2): "0"(c0), "1"(c1), "2"(c2), "g"(i), "g"(j)  :"%rax","%rdx","cc");
 
 #elif defined(TFM_SSE2)
 /* use SSE2 optimizations */
diff --git a/src/sqr/fp_sqr_comba.c b/src/sqr/fp_sqr_comba.c
index 54613e0..4940f4e 100644
--- a/src/sqr/fp_sqr_comba.c
+++ b/src/sqr/fp_sqr_comba.c
@@ -109,7 +109,7 @@ asm(                                                     \
      "addq  %%rax,%0     \n\t"                            \
      "adcq  %%rdx,%1     \n\t"                            \
      "adcq  $0,%2        \n\t"                            \
-     :"=r"(c0), "=r"(c1), "=r"(c2): "0"(c0), "1"(c1), "2"(c2), "g"(i) :"%rax","%rdx","%cc");
+     :"=r"(c0), "=r"(c1), "=r"(c2): "0"(c0), "1"(c1), "2"(c2), "g"(i) :"%rax","%rdx","cc");
 
 #define SQRADD2(i, j)                                     \
 asm(                                                     \
@@ -121,7 +121,7 @@ asm(                                                     \
      "addq  %%rax,%0     \n\t"                            \
      "adcq  %%rdx,%1     \n\t"                            \
      "adcq  $0,%2        \n\t"                            \
-     :"=r"(c0), "=r"(c1), "=r"(c2): "0"(c0), "1"(c1), "2"(c2), "g"(i), "g"(j)  :"%rax","%rdx","%cc");
+     :"=r"(c0), "=r"(c1), "=r"(c2): "0"(c0), "1"(c1), "2"(c2), "g"(i), "g"(j)  :"%rax","%rdx","cc");
 
 #define SQRADDSC(i, j)                                    \
 asm(                                                     \
@@ -130,7 +130,7 @@ asm(                                                     \
      "movq  %%rax,%0     \n\t"                            \
      "movq  %%rdx,%1     \n\t"                            \
      "xorq  %2,%2        \n\t"                            \
-     :"=r"(sc0), "=r"(sc1), "=r"(sc2): "0"(sc0), "1"(sc1), "2"(sc2), "g"(i), "g"(j) :"%rax","%rdx","%cc");
+     :"=r"(sc0), "=r"(sc1), "=r"(sc2): "0"(sc0), "1"(sc1), "2"(sc2), "g"(i), "g"(j) :"%rax","%rdx","cc");
 
 #define SQRADDAC(i, j)                                                         \
 asm(                                                     \
@@ -139,7 +139,7 @@ asm(                                                     \
      "addq  %%rax,%0     \n\t"                            \
      "adcq  %%rdx,%1     \n\t"                            \
      "adcq  $0,%2        \n\t"                            \
-     :"=r"(sc0), "=r"(sc1), "=r"(sc2): "0"(sc0), "1"(sc1), "2"(sc2), "g"(i), "g"(j) :"%rax","%rdx","%cc");
+     :"=r"(sc0), "=r"(sc1), "=r"(sc2): "0"(sc0), "1"(sc1), "2"(sc2), "g"(i), "g"(j) :"%rax","%rdx","cc");
 
 #define SQRADDDB                                          \
 asm(                                                     \
@@ -149,7 +149,7 @@ asm(                                                     \
      "addq %6,%0         \n\t"                            \
      "adcq %7,%1         \n\t"                            \
      "adcq %8,%2         \n\t"                            \
-     :"=r"(c0), "=r"(c1), "=r"(c2) : "0"(c0), "1"(c1), "2"(c2), "r"(sc0), "r"(sc1), "r"(sc2) : "%cc");
+     :"=r"(c0), "=r"(c1), "=r"(c2) : "0"(c0), "1"(c1), "2"(c2), "r"(sc0), "r"(sc1), "r"(sc2) : "cc");
 
 #elif defined(TFM_SSE2)