357 lines
7.0 KiB
Bash
Executable File
357 lines
7.0 KiB
Bash
Executable File
#!/bin/sh
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self=$0
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usage() {
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cat <<EOF >&2
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Usage: $self [options] FILE
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Reads the Run Time CPU Detections definitions from FILE and generates a
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C header file on stdout.
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Options:
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--arch=ARCH Architecture to generate defs for (required)
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--disable-EXT Disable support for EXT extensions
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--require-EXT Require support for EXT extensions
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--sym=SYMBOL Unique symbol to use for RTCD initialization function
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--config=FILE File with CONFIG_FOO=yes lines to parse
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EOF
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exit 1
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}
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die() {
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echo "$@" >&2
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exit 1
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}
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die_argument_required() {
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die "Option $opt requires argument"
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}
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for opt; do
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optval="${opt#*=}"
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case "$opt" in
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--arch) die_argument_required;;
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--arch=*) arch=${optval};;
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--disable-*) eval "disable_${opt#--disable-}=true";;
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--require-*) REQUIRES="${REQUIRES}${opt#--require-} ";;
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--sym) die_argument_required;;
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--sym=*) symbol=${optval};;
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--config=*) config_file=${optval};;
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-h|--help)
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usage
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;;
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-*)
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die "Unrecognized option: ${opt%%=*}"
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;;
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*)
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defs_file="$defs_file $opt"
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;;
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esac
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shift
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done
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for f in $defs_file; do [ -f "$f" ] || usage; done
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[ -n "$arch" ] || usage
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# Import the configuration
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[ -f "$config_file" ] && eval $(grep CONFIG_ "$config_file")
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#
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# Routines for the RTCD DSL to call
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#
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prototype() {
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local rtyp
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case "$1" in
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unsigned) rtyp="$1 "; shift;;
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esac
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rtyp="${rtyp}$1"
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local fn="$2"
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local args="$3"
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eval "${2}_rtyp='$rtyp'"
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eval "${2}_args='$3'"
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ALL_FUNCS="$ALL_FUNCS $fn"
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specialize $fn c
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}
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specialize() {
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local fn="$1"
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shift
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for opt in "$@"; do
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eval "${fn}_${opt}=${fn}_${opt}"
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done
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}
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require() {
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for fn in $ALL_FUNCS; do
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for opt in "$@"; do
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local ofn=$(eval "echo \$${fn}_${opt}")
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[ -z "$ofn" ] && continue
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# if we already have a default, then we can disable it, as we know
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# we can do better.
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local best=$(eval "echo \$${fn}_default")
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local best_ofn=$(eval "echo \$${best}")
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[ -n "$best" ] && [ "$best_ofn" != "$ofn" ] && eval "${best}_link=false"
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eval "${fn}_default=${fn}_${opt}"
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eval "${fn}_${opt}_link=true"
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done
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done
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}
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forward_decls() {
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ALL_FORWARD_DECLS="$ALL_FORWARD_DECLS $1"
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}
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#
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# Include the user's directives
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#
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for f in $defs_file; do
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. $f
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done
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#
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# Process the directives according to the command line
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#
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process_forward_decls() {
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for fn in $ALL_FORWARD_DECLS; do
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eval $fn
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done
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}
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determine_indirection() {
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[ "$CONFIG_RUNTIME_CPU_DETECT" = "yes" ] || require $ALL_ARCHS
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for fn in $ALL_FUNCS; do
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local n=""
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local rtyp="$(eval "echo \$${fn}_rtyp")"
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local args="$(eval "echo \"\$${fn}_args\"")"
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local dfn="$(eval "echo \$${fn}_default")"
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dfn=$(eval "echo \$${dfn}")
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for opt in "$@"; do
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local ofn=$(eval "echo \$${fn}_${opt}")
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[ -z "$ofn" ] && continue
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local link=$(eval "echo \$${fn}_${opt}_link")
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[ "$link" = "false" ] && continue
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n="${n}x"
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done
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if [ "$n" = "x" ]; then
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eval "${fn}_indirect=false"
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else
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eval "${fn}_indirect=true"
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fi
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done
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}
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declare_function_pointers() {
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for fn in $ALL_FUNCS; do
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local rtyp="$(eval "echo \$${fn}_rtyp")"
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local args="$(eval "echo \"\$${fn}_args\"")"
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local dfn="$(eval "echo \$${fn}_default")"
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dfn=$(eval "echo \$${dfn}")
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for opt in "$@"; do
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local ofn=$(eval "echo \$${fn}_${opt}")
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[ -z "$ofn" ] && continue
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echo "$rtyp ${ofn}($args);"
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done
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if [ "$(eval "echo \$${fn}_indirect")" = "false" ]; then
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echo "#define ${fn} ${dfn}"
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else
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echo "RTCD_EXTERN $rtyp (*${fn})($args);"
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fi
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echo
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done
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}
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set_function_pointers() {
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for fn in $ALL_FUNCS; do
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local n=""
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local rtyp="$(eval "echo \$${fn}_rtyp")"
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local args="$(eval "echo \"\$${fn}_args\"")"
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local dfn="$(eval "echo \$${fn}_default")"
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dfn=$(eval "echo \$${dfn}")
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if $(eval "echo \$${fn}_indirect"); then
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echo " $fn = $dfn;"
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for opt in "$@"; do
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local ofn=$(eval "echo \$${fn}_${opt}")
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[ -z "$ofn" ] && continue
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[ "$ofn" = "$dfn" ] && continue;
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local link=$(eval "echo \$${fn}_${opt}_link")
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[ "$link" = "false" ] && continue
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local cond="$(eval "echo \$have_${opt}")"
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echo " if (${cond}) $fn = $ofn;"
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done
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fi
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echo
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done
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}
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filter() {
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local filtered
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for opt in "$@"; do
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[ -z $(eval "echo \$disable_${opt}") ] && filtered="$filtered $opt"
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done
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echo $filtered
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}
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#
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# Helper functions for generating the arch specific RTCD files
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#
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common_top() {
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local outfile_basename=$(basename ${symbol:-rtcd.h})
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local include_guard=$(echo $outfile_basename | tr '[a-z]' '[A-Z]' | tr -c '[A-Z]' _)
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cat <<EOF
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#ifndef ${include_guard}
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#define ${include_guard}
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#ifdef RTCD_C
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#define RTCD_EXTERN
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#else
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#define RTCD_EXTERN extern
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#endif
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$(process_forward_decls)
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$(declare_function_pointers c $ALL_ARCHS)
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void ${symbol:-rtcd}(void);
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EOF
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}
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common_bottom() {
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cat <<EOF
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#endif
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EOF
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}
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x86() {
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determine_indirection c $ALL_ARCHS
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# Assign the helper variable for each enabled extension
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for opt in $ALL_ARCHS; do
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local uc=$(echo $opt | tr '[a-z]' '[A-Z]')
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eval "have_${opt}=\"flags & HAS_${uc}\""
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done
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cat <<EOF
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$(common_top)
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#ifdef RTCD_C
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#include "vpx_ports/x86.h"
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static void setup_rtcd_internal(void)
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{
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int flags = x86_simd_caps();
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(void)flags;
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$(set_function_pointers c $ALL_ARCHS)
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}
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#endif
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$(common_bottom)
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EOF
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}
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arm() {
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determine_indirection c $ALL_ARCHS
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# Assign the helper variable for each enabled extension
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for opt in $ALL_ARCHS; do
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local uc=$(echo $opt | tr '[a-z]' '[A-Z]')
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eval "have_${opt}=\"flags & HAS_${uc}\""
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done
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cat <<EOF
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$(common_top)
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#include "vpx_config.h"
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#ifdef RTCD_C
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#include "vpx_ports/arm.h"
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static void setup_rtcd_internal(void)
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{
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int flags = arm_cpu_caps();
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(void)flags;
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$(set_function_pointers c $ALL_ARCHS)
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}
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#endif
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$(common_bottom)
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EOF
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}
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mips() {
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determine_indirection c $ALL_ARCHS
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cat <<EOF
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$(common_top)
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#include "vpx_config.h"
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#ifdef RTCD_C
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static void setup_rtcd_internal(void)
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{
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$(set_function_pointers c $ALL_ARCHS)
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#if HAVE_DSPR2
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void dsputil_static_init();
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dsputil_static_init();
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#endif
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}
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#endif
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$(common_bottom)
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EOF
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}
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unoptimized() {
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determine_indirection c
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cat <<EOF
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$(common_top)
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#include "vpx_config.h"
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#ifdef RTCD_C
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static void setup_rtcd_internal(void)
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{
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$(set_function_pointers c)
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}
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#endif
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$(common_bottom)
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EOF
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}
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#
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# Main Driver
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#
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require c
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case $arch in
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x86)
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ALL_ARCHS=$(filter mmx sse sse2 sse3 ssse3 sse4_1)
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x86
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;;
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x86_64)
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ALL_ARCHS=$(filter mmx sse sse2 sse3 ssse3 sse4_1)
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REQUIRES=${REQUIRES:-mmx sse sse2}
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require $(filter $REQUIRES)
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x86
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;;
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mips32)
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ALL_ARCHS=$(filter mips32)
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dspr2=$([ -f "$config_file" ] && eval echo $(grep HAVE_DSPR2 "$config_file"))
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HAVE_DSPR2="${dspr2#*=}"
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if [ "$HAVE_DSPR2" = "yes" ]; then
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ALL_ARCHS=$(filter mips32 dspr2)
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fi
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mips
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;;
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armv5te)
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ALL_ARCHS=$(filter edsp)
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arm
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;;
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armv6)
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ALL_ARCHS=$(filter edsp media)
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arm
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;;
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armv7)
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ALL_ARCHS=$(filter edsp media neon)
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arm
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;;
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*)
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unoptimized
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;;
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esac
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