e_padlock.c: last x86_64 commit didn't work with some optimizers.

diff --git a/engines/e_padlock.c b/engines/e_padlock.c
index 7c64cf38c53c7d056a1d1f0a0702fac6d89c0344..f0142798f49564819165c9a4eb381b5b23b021cb 100644 (file)
--- a/engines/e_padlock.c
+++ b/engines/e_padlock.c
@@ -453,32 +453,33 @@ padlock_available(void)
 {
        char vendor_string[16];
        unsigned int eax, edx;
+       size_t  scratch;
 
        /* Are we running on the Centaur (VIA) CPU? */
        eax = 0x00000000;
        vendor_string[12] = 0;
        asm volatile (
-               "pushq  %%rbx\n"
+               "movq   %%rbx,%1\n"
                "cpuid\n"
-               "movl   %%ebx,(%1)\n"
-               "movl   %%edx,4(%1)\n"
-               "movl   %%ecx,8(%1)\n"
-               "popq   %%rbx"
-               : "+a"(eax) : "r"(vendor_string) : "rcx", "rdx");
+               "movl   %%ebx,(%2)\n"
+               "movl   %%edx,4(%2)\n"
+               "movl   %%ecx,8(%2)\n"
+               "movq   %1,%%rbx"
+               : "+a"(eax), "=&r"(scratch) : "r"(vendor_string) : "rcx", "rdx");
        if (strcmp(vendor_string, "CentaurHauls") != 0)
                return 0;
 
        /* Check for Centaur Extended Feature Flags presence */
        eax = 0xC0000000;
-       asm volatile ("pushq %%rbx; cpuid; popq %%rbx"
-               : "+a"(eax) : : "rcx", "rdx");
+       asm volatile ("movq %%rbx,%1; cpuid; movq %1,%%rbx"
+               : "+a"(eax), "=&r"(scratch) : : "rcx", "rdx");
        if (eax < 0xC0000001)
                return 0;
 
        /* Read the Centaur Extended Feature Flags */
        eax = 0xC0000001;
-       asm volatile ("pushq %%rbx; cpuid; popq %%rbx"
-               : "+a"(eax), "=d"(edx) : : "rcx");
+       asm volatile ("movq %%rbx,%2; cpuid; movq %2,%%rbx"
+               : "+a"(eax), "=d"(edx), "=&r"(scratch) : : "rcx");
 
        /* Fill up some flags */
        padlock_use_ace = ((edx & (0x3<<6)) == (0x3<<6));
@@ -534,12 +535,13 @@ static inline void *name(size_t cnt,              \
        struct padlock_cipher_data *cdata,      \
        void *out, const void *inp)             \
 {      void *iv;                               \
-       asm volatile ( "pushq   %%rbx\n"        \
+       size_t scratch;                         \
+       asm volatile ( "movq    %%rbx,%4\n"     \
                "       leaq    16(%0),%%rdx\n" \
                "       leaq    32(%0),%%rbx\n" \
                        rep_xcrypt "\n"         \
-               "       popq    %%rbx"          \
-               : "=a"(iv), "=c"(cnt), "=D"(out), "=S"(inp) \
+               "       movq    %%rbx,%4"       \
+               : "=a"(iv), "=c"(cnt), "=D"(out), "=S"(inp), "=&r"(scratch) \
                : "0"(cdata), "1"(cnt), "2"(out), "3"(inp)  \
                : "rdx", "cc", "memory");       \
        return iv;                              \