VirtualAlloc
winsock2_h
xform_asm
+ xmm_clobbers
yasm
"
check_asm ebx_available '""::"b"(0)' &&
check_asm ebx_available '"":::"%ebx"'
+ # check whether xmm clobbers are supported
+ check_asm xmm_clobbers '"":::"%xmm0"'
+
# check whether more than 10 operands are supported
check_cc <<EOF && enable ten_operands
int main(void) {
# define BROKEN_RELOCATIONS 1
#endif
+/*
+ * If gcc is not set to support sse (-msse) it will not accept xmm registers
+ * in the clobber list for inline asm. XMM_CLOBBERS takes a list of xmm
+ * registers to be marked as clobbered and evaluates to nothing if they are
+ * not supported, or to the list itself if they are supported. Since a clobber
+ * list may not be empty, XMM_CLOBBERS_ONLY should be used if the xmm
+ * registers are the only in the clobber list.
+ * For example a list with "eax" and "xmm0" as clobbers should become:
+ * : XMM_CLOBBERS("xmm0",) "eax"
+ * and a list with only "xmm0" should become:
+ * XMM_CLOBBERS_ONLY("xmm0")
+ */
+#if HAVE_XMM_CLOBBERS
+# define XMM_CLOBBERS(...) __VA_ARGS__
+# define XMM_CLOBBERS_ONLY(...) : __VA_ARGS__
+#else
+# define XMM_CLOBBERS(...)
+# define XMM_CLOBBERS_ONLY(...)
+#endif
+
#endif /* AVUTIL_X86_CPU_H */