Author: dim
Date: Tue Oct 8 17:26:28 2013
New Revision: 256157
URL: http://svnweb.freebsd.org/changeset/base/256157
Log:
Now our binutils's assembler supports the Intel Random Number Generator
extensions, we can change the .byte directives in sys/dev/random/ivy.c
to plain 'rdrand' mnemonics. This already worked for clang users, but
now it will also work for gcc users.
Approved by: re (kib)
Approved by: so (des)
MFC after: 1 week
Modified:
head/sys/dev/random/ivy.c
Modified: head/sys/dev/random/ivy.c
==============================================================================
--- head/sys/dev/random/ivy.c Tue Oct 8 16:36:17 2013 (r256156)
+++ head/sys/dev/random/ivy.c Tue Oct 8 17:26:28 2013 (r256157)
@@ -68,12 +68,12 @@ ivy_rng_store(long *tmp)
__asm __volatile(
#ifdef __amd64__
- ".byte\t0x48,0x0f,0xc7,0xf0\n\t" /* rdrand %rax */
+ "rdrand\t%%rax\n\t"
"jnc\t1f\n\t"
"movq\t%%rax,%1\n\t"
"movl\t$8,%%eax\n"
#else /* i386 */
- ".byte\t0x0f,0xc7,0xf0\n\t" /* rdrand %eax */
+ "rdrand\t%%eax\n\t"
"jnc\t1f\n\t"
"movl\t%%eax,%1\n\t"
"movl\t$4,%%eax\n"
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