Changeset 94755 in vbox for trunk/src/libs/softfloat-3e

Timestamp:

Apr 29, 2022 8:32:59 AM (3 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

151137

Message:

libs/softfloat: softfloat_countLeadingZeros16/32/64 onto ASMBitLastSetU16/32/64 when not on GCC or similar. bugref:9898

File:

• trunk/src/libs/softfloat-3e/build/vbox/platform.h (modified) (2 diffs)

trunk/src/libs/softfloat-3e/build/vbox/platform.h

@@ -51 +51 @@
 #endif
 
+/* Generic IPRT asm.h based optimizations: */
+#if !defined(__GNUC__)
+# include <iprt/asm.h>
+# define softfloat_countLeadingZeros16 softfloat_iprt_countLeadingZeros16
+DECLINLINE(uint_fast8_t) softfloat_iprt_countLeadingZeros16(uint16_t uVal)
+{
+    return 16 - ASMBitLastSetU16(uVal);
+}
+# define softfloat_countLeadingZeros32 softfloat_iprt_countLeadingZeros32
+DECLINLINE(uint_fast8_t) softfloat_iprt_countLeadingZeros32(uint32_t uVal)
+{
+    return 32 - ASMBitLastSetU32(uVal);
+}
+# define softfloat_countLeadingZeros64 softfloat_iprt_countLeadingZeros64
+DECLINLINE(uint_fast8_t) softfloat_iprt_countLeadingZeros64(uint64_t uVal)
+{
+    return 64 - ASMBitLastSetU64(uVal);
+}
+#endif
+
 /* Include GCC optimizations: */
 #ifdef __GNUC__
-# define SOFTFLOAT_BUILTIN_CLZ          1
+# ifndef softfloat_countLeadingZeros16
+#  define SOFTFLOAT_BUILTIN_CLZ         1
+# endif
 # if ARCH_BITS > 32
 #  define SOFTFLOAT_INTRINSIC_INT128    1
@@ -59 +81 @@
 # include "opts-GCC.h"
 #endif
-/** @todo do Visual C++ optimization / generic IPRT based ones. */
 
 /* We've eliminated the global variables and need no TLS variable tricks. */