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authorRoland McGrath <roland@gnu.org>2002-12-27 23:05:53 +0000
committerRoland McGrath <roland@gnu.org>2002-12-27 23:05:53 +0000
commitaad08dbad983a352492542a61478074e5869dec6 (patch)
treea834bf94b853e8ac0331bbf0eed8e4862c44ff38
parent4f172c25f1c39e86b433075d36f3e6c19e06f136 (diff)
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2002-12-27 Roland McGrath <roland@redhat.com>
* scripts/gen-as-const.awk: New file. * Makefile (distribute): Add it. * Makerules ($(common-objpfx)%.h %.h.d: %.sym): New pattern rule. (before-compile): Add $(gen-as-const-headers:%.sym=$(common-objpfx)%.h) to the list. (+depfiles): Add $(addprefix $(common-objpfx),$(gen-as-const-headers)).
-rw-r--r--Makefile2
-rw-r--r--Makerules20
-rw-r--r--scripts/gen-as-const.awk29
3 files changed, 49 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 3a92ccb..b48738c 100644
--- a/Makefile
+++ b/Makefile
@@ -280,7 +280,7 @@ distribute := README README.libm INSTALL FAQ FAQ.in NOTES NEWS BUGS \
test-installation.pl gen-FAQ.pl versions.awk\
gen-sorted.awk abi-versions.awk abilist.awk \
firstversions.awk documented.sh cpp \
- output-format.sed)
+ output-format.sed gen-as-const.awk)
distribute := $(strip $(distribute))
generated := $(generated) stubs.h
diff --git a/Makerules b/Makerules
index df56d7a..7e31ef7 100644
--- a/Makerules
+++ b/Makerules
@@ -663,7 +663,8 @@ ifeq ($(build-programs),yes)
endif
+depfiles := $(addprefix $(objpfx),\
$(filter-out $(addsuffix .d,$(omit-deps)),\
- $(+depfiles)))
+ $(+depfiles))) \
+ $(addprefix $(common-objpfx),$(gen-as-const-headers:.sym=.h.d))
ifdef +depfiles
ifneq ($(no_deps),t)
@@ -1177,6 +1178,23 @@ common-generated += libc.symlist
endif
endif
+
+# Generating headers for assembly constants.
+$(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.awk %.sym
+ $(AWK) -f $^ \
+ | $(CC) -S -o - $(CFLAGS) $(CPPFLAGS) -x c - \
+ -MD -MF $(@:.h=.h.d)T -MT '$(@:.h=.h.d) $(@:.h.d=.h)' \
+ | sed -n 's/^.*@@@name@@@\([^@]*\)@@@value@@@[^@]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$$/#define \1 \2/p' > $(@:.h.d=.h)T
+ sed $(sed-remove-objpfx) \
+ -e 's@ *\([^ \/][^ \]*\)@ $$(..)\1@g' \
+ -e 's@ *\.\.\/\([^ \]*\)@ $$(..)\1@g' \
+ $(@:.h=.h.d)T > $(@:.h=.h.d)T2
+ rm -f $(@:.h=.h.d)T
+ mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
+ mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
+vpath %.sym $(sysdirs)
+
+before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
.PHONY: TAGS
TAGS: $(objpfx)distinfo $(..)MakeTAGS
diff --git a/scripts/gen-as-const.awk b/scripts/gen-as-const.awk
new file mode 100644
index 0000000..b29656e
--- /dev/null
+++ b/scripts/gen-as-const.awk
@@ -0,0 +1,29 @@
+# Script used in producing headers of assembly constants from C expressions.
+# The input to this script looks like:
+# #cpp-directive ...
+# NAME1
+# NAME2 expression ...
+# The output of this script is C code to be run through gcc -S and then
+# massaged to extract the integer constant values of the given C expressions.
+# A line giving just a name implies an expression consisting of just that name.
+
+BEGIN { started = 0 }
+
+# cpp directives go straight through.
+/^#/ { print; next }
+
+NF >= 1 && !started {
+ print "void dummy(void) {";
+ started = 1;
+}
+
+NF == 1 { sub(/^.*$/, "& &"); }
+
+NF > 1 {
+ name = $1;
+ sub(/^[^ ]+[ ]+/, "");
+ printf "asm (\"@@@name@@@%s@@@value@@@%%0@@@end@@@\" : : \"i\" (%s));\n",
+ name, $0;
+}
+
+END { if (started) print "}" }