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-rw-r--r--src/sis_context.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/sis_context.h b/src/sis_context.h
index c349bf9..5fc8267 100644
--- a/src/sis_context.h
+++ b/src/sis_context.h
@@ -401,8 +401,10 @@ struct sis_context
#define MMIO_READ(reg) *(volatile GLint *)(smesa->IOBase + (reg))
#define MMIO_READf(reg) *(volatile GLfloat *)(smesa->IOBase + (reg))
-#if defined(__i386__) || defined(__amd64__)
+#if defined(__i386__) || defined(__x86_64__)
#define MMIO_WMB() __asm __volatile("" : : : "memory")
+#elif defined(__ia64__)
+#define MMIO_WMB() __asm __volatile("mf" : : : "memory")
#else
#error platform needs WMB
#endif