[ALPHA] Expose shifts in virt_to_phys to the compiler.

589ba3d8 · Richard Henderson · 24485ae2 · 589ba3d8
Commit 589ba3d8 authored Jan 14, 2003 by Richard Henderson
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include/asm-alpha/io.h include/asm-alpha/io.h +5 -5

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--- a/include/asm-alpha/io.h
+++ b/include/asm-alpha/io.h
@@ -65,13 +65,13 @@ static inline void * phys_to_virt(unsigned long address)
 #else
 static inline unsigned long virt_to_phys(void *address)
 {
-        unsigned long phys;
+        unsigned long phys = (unsigned long)address;
-        __asm__ (
+	/* Sign-extend from bit 41.  */
-        "sll %1, 63-40, %0\n"
+	phys <<= (64 - 41);
-        "sra %0, 63-40, %0\n"
+	phys = (long)phys >> (64 - 41);
-        : "=r" (phys) : "r" (address));
+	/* Crop to the physical address width of the processor.  */
        phys &= (1ul << hwrpb->pa_bits) - 1;
        return phys;