Add volatile qualifications to two blocks of inline asm to stop GCC from

[openssl.git] / crypto / bn / asm / x86_64-gcc.c

diff --git a/crypto/bn/asm/x86_64-gcc.c b/crypto/bn/asm/x86_64-gcc.c
index dfb7506267c41e31ebba74983ad5521c652c89bf..7d97c0bedc4a9cf451b3aa90aba98d8c250d9bd1 100644 (file)
--- a/crypto/bn/asm/x86_64-gcc.c
+++ b/crypto/bn/asm/x86_64-gcc.c
@@ -189,7 +189,7 @@ BN_ULONG bn_add_words (BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int
 
        if (n <= 0) return 0;
 
-       asm (
+       asm volatile (
        "       subq    %0,%0           \n"     /* clear carry */
        "       jmp     1f              \n"
        ".p2align 4                     \n"
@@ -201,7 +201,7 @@ BN_ULONG bn_add_words (BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int
        "       sbbq    %0,%0           \n"
                : "=&r"(ret),"+c"(n),"+r"(i)
                : "r"(rp),"r"(ap),"r"(bp)
-               : "cc"
+               : "cc", "memory"
        );
 
   return ret&1;
@@ -214,7 +214,7 @@ BN_ULONG bn_sub_words (BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int
 
        if (n <= 0) return 0;
 
-       asm (
+       asm volatile (
        "       subq    %0,%0           \n"     /* clear borrow */
        "       jmp     1f              \n"
        ".p2align 4                     \n"
@@ -226,7 +226,7 @@ BN_ULONG bn_sub_words (BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int
        "       sbbq    %0,%0           \n"
                : "=&r"(ret),"+c"(n),"+r"(i)
                : "r"(rp),"r"(ap),"r"(bp)
-               : "cc"
+               : "cc", "memory"
        );
 
   return ret&1;