libvpx: Pull from upstream

source/libvpx/build/make/rtcd.sh

-#!/bin/sh
-self=$0
-
-usage() {
-  cat <<EOF >&2
-Usage: $self [options] FILE
-
-Reads the Run Time CPU Detections definitions from FILE and generates a
-C header file on stdout.
-
-Options:
-  --arch=ARCH   Architecture to generate defs for (required)
-  --disable-EXT Disable support for EXT extensions
-  --require-EXT Require support for EXT extensions
-  --sym=SYMBOL  Unique symbol to use for RTCD initialization function
-  --config=FILE File with CONFIG_FOO=yes lines to parse
-EOF
-  exit 1
-}
-
-die() {
-  echo "$@" >&2
-  exit 1
-}
-
-die_argument_required() {
-  die "Option $opt requires argument"
-}
-
-for opt; do
-  optval="${opt#*=}"
-  case "$opt" in
-    --arch) die_argument_required;;
-    --arch=*) arch=${optval};;
-    --disable-*) eval "disable_${opt#--disable-}=true";;
-    --require-*) REQUIRES="${REQUIRES}${opt#--require-} ";;
-    --sym) die_argument_required;;
-    --sym=*) symbol=${optval};;
-    --config=*) config_file=${optval};;
-    -h|--help)
-      usage
-      ;;
-    -*)
-      die "Unrecognized option: ${opt%%=*}"
-      ;;
-    *)
-      defs_file="$defs_file $opt"
-      ;;
-  esac
-  shift
-done
-for f in $defs_file; do [ -f "$f" ] || usage; done
-[ -n "$arch" ] || usage
-
-# Import the configuration
-[ -f "$config_file" ] && eval $(grep CONFIG_ "$config_file")
-
-#
-# Routines for the RTCD DSL to call
-#
-prototype() {
-  rtyp=""
-  case "$1" in
-    unsigned) rtyp="$1 "; shift;;
-  esac
-  rtyp="${rtyp}$1"
-  fn="$2"
-  args="$3"
-
-  eval "${2}_rtyp='$rtyp'"
-  eval "${2}_args='$3'"
-  ALL_FUNCS="$ALL_FUNCS $fn"
-  specialize $fn c
-}
-
-specialize() {
-  fn="$1"
-  shift
-  for opt in "$@"; do
-    eval "${fn}_${opt}=${fn}_${opt}"
-  done
-}
-
-require() {
-  for fn in $ALL_FUNCS; do
-    for opt in "$@"; do
-      ofn=$(eval "echo \$${fn}_${opt}")
-      [ -z "$ofn" ] && continue
-
-      # if we already have a default, then we can disable it, as we know
-      # we can do better.
-      best=$(eval "echo \$${fn}_default")
-      best_ofn=$(eval "echo \$${best}")
-      [ -n "$best" ] && [ "$best_ofn" != "$ofn" ] && eval "${best}_link=false"
-      eval "${fn}_default=${fn}_${opt}"
-      eval "${fn}_${opt}_link=true"
-    done
-  done
-}
-
-forward_decls() {
-  ALL_FORWARD_DECLS="$ALL_FORWARD_DECLS $1"
-}
-
-#
-# Include the user's directives
-#
-for f in $defs_file; do
-  . $f
-done
-
-#
-# Process the directives according to the command line
-#
-process_forward_decls() {
-  for fn in $ALL_FORWARD_DECLS; do
-    eval $fn
-  done
-}
-
-determine_indirection() {
-  [ "$CONFIG_RUNTIME_CPU_DETECT" = "yes" ] || require $ALL_ARCHS
-  for fn in $ALL_FUNCS; do
-    n=""
-    rtyp="$(eval "echo \$${fn}_rtyp")"
-    args="$(eval "echo \"\$${fn}_args\"")"
-    dfn="$(eval "echo \$${fn}_default")"
-    dfn=$(eval "echo \$${dfn}")
-    for opt in "$@"; do
-      ofn=$(eval "echo \$${fn}_${opt}")
-      [ -z "$ofn" ] && continue
-      link=$(eval "echo \$${fn}_${opt}_link")
-      [ "$link" = "false" ] && continue
-      n="${n}x"
-    done
-    if [ "$n" = "x" ]; then
-      eval "${fn}_indirect=false"
-    else
-      eval "${fn}_indirect=true"
-    fi
-  done
-}
-
-declare_function_pointers() {
-  for fn in $ALL_FUNCS; do
-    rtyp="$(eval "echo \$${fn}_rtyp")"
-    args="$(eval "echo \"\$${fn}_args\"")"
-    dfn="$(eval "echo \$${fn}_default")"
-    dfn=$(eval "echo \$${dfn}")
-    for opt in "$@"; do
-      ofn=$(eval "echo \$${fn}_${opt}")
-      [ -z "$ofn" ] && continue
-      echo "$rtyp ${ofn}($args);"
-    done
-    if [ "$(eval "echo \$${fn}_indirect")" = "false" ]; then
-      echo "#define ${fn} ${dfn}"
-    else
-      echo "RTCD_EXTERN $rtyp (*${fn})($args);"
-    fi
-    echo
-  done
-}
-
-set_function_pointers() {
-  for fn in $ALL_FUNCS; do
-    n=""
-    rtyp="$(eval "echo \$${fn}_rtyp")"
-    args="$(eval "echo \"\$${fn}_args\"")"
-    dfn="$(eval "echo \$${fn}_default")"
-    dfn=$(eval "echo \$${dfn}")
-    if $(eval "echo \$${fn}_indirect"); then
-      echo "    $fn = $dfn;"
-      for opt in "$@"; do
-        ofn=$(eval "echo \$${fn}_${opt}")
-        [ -z "$ofn" ] && continue
-        [ "$ofn" = "$dfn" ] && continue;
-        link=$(eval "echo \$${fn}_${opt}_link")
-        [ "$link" = "false" ] && continue
-        cond="$(eval "echo \$have_${opt}")"
-        echo "    if (${cond}) $fn = $ofn;"
-      done
-    fi
-    echo
-  done
-}
-
-filter() {
-  filtered=""
-  for opt in "$@"; do
-    [ -z $(eval "echo \$disable_${opt}") ] && filtered="$filtered $opt"
-  done
-  echo $filtered
-}
-
-#
-# Helper functions for generating the arch specific RTCD files
-#
-common_top() {
-  outfile_basename=$(basename ${symbol:-rtcd})
-  include_guard=$(echo $outfile_basename | tr '[a-z]' '[A-Z]' | \
-    tr -c '[A-Z0-9]' _)H_
-  cat <<EOF
-#ifndef ${include_guard}
-#define ${include_guard}
-
-#ifdef RTCD_C
-#define RTCD_EXTERN
-#else
-#define RTCD_EXTERN extern
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-$(process_forward_decls)
-
-$(declare_function_pointers c $ALL_ARCHS)
-
-void ${symbol:-rtcd}(void);
-EOF
-}
-
-common_bottom() {
-  cat <<EOF
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif
-
-#endif
-EOF
-}
-
-x86() {
-  determine_indirection c $ALL_ARCHS
-
-  # Assign the helper variable for each enabled extension
-  for opt in $ALL_ARCHS; do
-    uc=$(echo $opt | tr '[a-z]' '[A-Z]')
-    eval "have_${opt}=\"flags & HAS_${uc}\""
-  done
-
-  cat <<EOF
-$(common_top)
-
-#ifdef RTCD_C
-#include "vpx_ports/x86.h"
-static void setup_rtcd_internal(void)
-{
-    int flags = x86_simd_caps();
-
-    (void)flags;
-
-$(set_function_pointers c $ALL_ARCHS)
-}
-#endif
-$(common_bottom)
-EOF
-}
-
-arm() {
-  determine_indirection c $ALL_ARCHS
-
-  # Assign the helper variable for each enabled extension
-  for opt in $ALL_ARCHS; do
-    uc=$(echo $opt | tr '[a-z]' '[A-Z]')
-    eval "have_${opt}=\"flags & HAS_${uc}\""
-  done
-
-  cat <<EOF
-$(common_top)
-#include "vpx_config.h"
-
-#ifdef RTCD_C
-#include "vpx_ports/arm.h"
-static void setup_rtcd_internal(void)
-{
-    int flags = arm_cpu_caps();
-
-    (void)flags;
-
-$(set_function_pointers c $ALL_ARCHS)
-}
-#endif
-$(common_bottom)
-EOF
-}
-
-
-mips() {
-  determine_indirection c $ALL_ARCHS
-  cat <<EOF
-$(common_top)
-#include "vpx_config.h"
-
-#ifdef RTCD_C
-static void setup_rtcd_internal(void)
-{
-$(set_function_pointers c $ALL_ARCHS)
-#if HAVE_DSPR2
-#if CONFIG_VP8
-void dsputil_static_init();
-dsputil_static_init();
-#endif
-#if CONFIG_VP9
-void vp9_dsputil_static_init();
-vp9_dsputil_static_init();
-#endif
-#endif
-}
-#endif
-$(common_bottom)
-EOF
-}
-
-unoptimized() {
-  determine_indirection c
-  cat <<EOF
-$(common_top)
-#include "vpx_config.h"
-
-#ifdef RTCD_C
-static void setup_rtcd_internal(void)
-{
-$(set_function_pointers c)
-}
-#endif
-$(common_bottom)
-EOF
-
-}
-#
-# Main Driver
-#
-ALL_FUNCS=$(export LC_ALL=C; echo $ALL_FUNCS | tr ' ' '\n' | sort |tr '\n' ' ')
-require c
-case $arch in
-  x86)
-    ALL_ARCHS=$(filter mmx sse sse2 sse3 ssse3 sse4_1 avx avx2)
-    x86
-    ;;
-  x86_64)
-    ALL_ARCHS=$(filter mmx sse sse2 sse3 ssse3 sse4_1 avx avx2)
-    REQUIRES=${REQUIRES:-mmx sse sse2}
-    require $(filter $REQUIRES)
-    x86
-    ;;
-  mips32)
-    ALL_ARCHS=$(filter mips32)
-    dspr2=$([ -f "$config_file" ] && eval echo $(grep HAVE_DSPR2 "$config_file"))
-    HAVE_DSPR2="${dspr2#*=}"
-    if [ "$HAVE_DSPR2" = "yes" ]; then
-        ALL_ARCHS=$(filter mips32 dspr2)
-    fi
-    mips
-    ;;
-  armv5te)
-    ALL_ARCHS=$(filter edsp)
-    arm
-    ;;
-  armv6)
-    ALL_ARCHS=$(filter edsp media)
-    arm
-    ;;
-  armv7)
-    ALL_ARCHS=$(filter edsp media neon)
-    arm
-    ;;
-  *)
-    unoptimized
-    ;;
-esac