Changeset d92bf462 in mainline for kernel/arch/ppc32/include/cycle.h

Timestamp:

2010-05-22T22:31:17Z (14 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

ba7371f9

Parents:

d354d57

Message:

coding style changes, no change in functionality

File:

• kernel/arch/ppc32/include/cycle.h (modified) (1 diff)

kernel/arch/ppc32/include/cycle.h

@@ -40 +40 @@
         uint32_t lower;
         uint32_t upper;
-        uint32_t upper2;
+        uint32_t tmp;
         
-        asm volatile (
-                "1: mftbu %0\n"
-                "mftb %1\n"
-                "mftbu %2\n"
-                "cmpw %0, %2\n"
-                "bne- 1b\n"
-                : "=r" (upper),
-                  "=r" (lower),
-                  "=r" (upper2)
-                :: "cr0"
-        );
+        do {
+                asm volatile (
+                        "mftbu %[upper]\n"
+                        "mftb %[lower]\n"
+                        "mftbu %[tmp]\n"
+                        : [upper] "=r" (upper),
+                          [lower] "=r" (lower),
+                          [tmp] "=r" (tmp)
+                );
+        } while (upper != tmp);
         
         return ((uint64_t) upper << 32) + (uint64_t) lower;