target-supports.exp

Mac OS X 10.4.9 for x86 Source Code gcc 实现源代码

	}
    }

    if [info exists et_broken_cplxf_arg_saved] {
	verbose "check_effective_target_broken_cplxf_arg: using cached result" 2
    } else {
	set et_broken_cplxf_arg_saved 0
	# This is only known to affect one target.
	if { ![istarget powerpc64-*-linux*] || ![is-effective-target lp64] } {
	    set et_broken_cplxf_arg_saved 0
	    verbose "check_effective_target_broken_cplxf_arg: caching 0" 2
	    return $et_broken_cplxf_arg_saved
	}

	# Set up, compile, and execute a C test program that calls cabsf.
	set src cabsf[pid].c
	set exe cabsf[pid].x

	set f [open $src "w"]
	puts $f "#include <complex.h>"
	puts $f "extern void abort (void);"
	puts $f "float fabsf (float);"
	puts $f "float cabsf (_Complex float);"
	puts $f "int main ()"
	puts $f "{"
	puts $f "  _Complex float cf;"
	puts $f "  float f;"
	puts $f "  cf = 3 + 4.0fi;"
	puts $f "  f = cabsf (cf);"
	puts $f "  if (fabsf (f - 5.0) > 0.0001) abort ();"
	puts $f "  return 0;"
	puts $f "}"
	close $f

	set lines [${tool}_target_compile $src $exe executable "-lm"]
	file delete $src

	if [string match "" $lines] {
	    # No error message, compilation succeeded.
	    set result [${tool}_load "./$exe" "" ""]
	    set status [lindex $result 0]
	    remote_file build delete $exe

	    verbose "check_effective_target_broken_cplxf_arg: status is <$status>" 2

	    if { $status != "pass" } {
		set et_broken_cplxf_arg_saved 1
	    }
	} else {
	    verbose "check_effective_target_broken_cplxf_arg: compilation failed" 2
	}
    }
    return $et_broken_cplxf_arg_saved
}

proc check_alpha_max_hw_available { } {
    global alpha_max_hw_available_saved
    global tool

    if [info exists alpha_max_hw_available_saved] {
	verbose "check_alpha_max_hw_available returning saved $alpha_max_hw_available_saved" 2
    } else {
	set alpha_max_hw_available_saved 0

	# Set up, compile, and execute a test program probing bit 8 of the
	# architecture mask, which indicates presence of MAX instructions.
	set src max[pid].c
	set exe max[pid].x

	set f [open $src "w"]
	puts $f "int main() { return __builtin_alpha_amask(1<<8) != 0; }"
	close $f

	verbose "check_alpha_max_hw_available compiling testfile $src" 2
	set lines [${tool}_target_compile $src $exe executable ""]
	file delete $src

	if [string match "" $lines] then {
	    # No error message, compilation succeeded.
	    set result [${tool}_load "./$exe" "" ""]
	    set status [lindex $result 0]
	    remote_file build delete $exe
	    verbose "check_alpha_max_hw_available testfile status is <$status>" 2

	    if { $status == "pass" } then {
		set alpha_max_hw_available_saved 1
	    }
	} else {
	    verbose "check_alpha_max_hw_availalble testfile compilation failed" 2
	}
    }

    return $alpha_max_hw_available_saved
}

# Returns true iff the FUNCTION is available on the target system.
# (This is essentially a Tcl implementation of Autoconf's
# AC_CHECK_FUNC.)

proc check_function_available { function } {
    set var "${function}_available_saved"
    global $var
    global tool

    if {![info exists $var]} {
	# Assume it exists.
	set $var 1
	# Check to make sure.
	set src "function[pid].c"
	set exe "function[pid].exe"

	set f [open $src "w"]
	puts $f "int main () { $function (); }"
	close $f

	set lines [${tool}_target_compile $src $exe executable ""]
	file delete $src
	file delete $exe

	if {![string match "" $lines]} then {
	    set $var 0
	    verbose -log "$function is not available"
	} else {
	    verbose -log "$function is available"
	}
    }

    eval return \$$var
}

# Returns true iff "fork" is available on the target system.

proc check_fork_available {} {
    return [check_function_available "fork"]
}

# Returns true iff "mkfifo" is available on the target system.

proc check_mkfifo_available {} {
    if {[istarget *-*-cygwin*]} {
       # Cygwin has mkfifo, but support is incomplete.
       return 0
     }

    return [check_function_available "mkfifo"]
}

# Return 1 if we're generating 32-bit code using default options, 0
# otherwise.
#
# When the target name changes, replace the cached result.

proc check_effective_target_ilp32 { } {
    global et_ilp32_saved
    global et_ilp32_target_name

    if { ![info exists et_ilp32_target_name] } {
	set et_ilp32_target_name ""
    }

    # If the target has changed since we set the cached value, clear it.
    set current_target [current_target_name]
    if { $current_target != $et_ilp32_target_name } {
	verbose "check_effective_target_ilp32: `$et_ilp32_target_name' `$current_target'" 2
	set et_ilp32_target_name $current_target
	if { [info exists et_ilp32_saved] } {
	    verbose "check_effective_target_ilp32: removing cached result" 2
	    unset et_ilp32_saved
	}
    }

    if [info exists et_ilp32_saved] {
	verbose "check-effective_target_ilp32: using cached result" 2
    } else {
	verbose "check_effective_target_ilp32: compiling source" 2
	set et_ilp32_saved [string match "" [get_compiler_messages ilp32 object {
	    int dummy[(sizeof (int) == 4 && sizeof (void *) == 4 && sizeof (long) == 4 ) ? 1 : -1];
	}]]
    }
    verbose "check_effective_target_ilp32: returning $et_ilp32_saved" 2
    return $et_ilp32_saved
}

# Return 1 if we're generating 64-bit code using default options, 0
# otherwise.
#
# When the target name changes, replace the cached result.

proc check_effective_target_lp64 { } {
    global et_lp64_saved
    global et_lp64_target_name

    if { ![info exists et_lp64_target_name] } {
	set et_lp64_target_name ""
    }

    # If the target has changed since we set the cached value, clear it.
    set current_target [current_target_name]
    if { $current_target != $et_lp64_target_name } {
	verbose "check_effective_target_lp64: `$et_lp64_target_name' `$current_target'" 2
	set et_lp64_target_name $current_target
	if [info exists et_lp64_saved] {
	    verbose "check_effective_target_lp64: removing cached result" 2
	    unset et_lp64_saved
	}
    }

    if [info exists et_lp64_saved] {
	verbose "check_effective_target_lp64: using cached result" 2
    } else {
	verbose "check_effective_target_lp64: compiling source" 2
	set et_lp64_saved [string match "" [get_compiler_messages lp64 object {
	    int dummy[(sizeof (int) == 4 && sizeof (void *) == 8 && sizeof (long) == 8 ) ? 1 : -1];
	}]]
    }
    verbose "check_effective_target_lp64: returning $et_lp64_saved" 2
    return $et_lp64_saved
}

# Return 1 if the target supports hardware vectors of int, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_int { } {
    global et_vect_int_saved

    if [info exists et_vect_int_saved] {
	verbose "check_effective_target_vect_int: using cached result" 2
    } else {
	set et_vect_int_saved 0
	if { [istarget i?86-*-*]
	      || [istarget powerpc*-*-*]
	      || [istarget x86_64-*-*]
	      || [istarget sparc*-*-*]
	      || [istarget alpha*-*-*]
	      || [istarget ia64-*-*] } {
	   set et_vect_int_saved 1
	}
    }

    verbose "check_effective_target_vect_int: returning $et_vect_int_saved" 2
    return $et_vect_int_saved
}

# APPLE LOCAL begin mainline 2005-04-05 3972515 
# Return 1 if the target supports hardware vector shift operation.

proc check_effective_target_vect_shift { } {
    if { [istarget powerpc*-*-*] } {
	set answer 1
    } else {
	set answer 0
    }

    verbose "check_effective_target_vect_shift: returning $answer" 2
    return $answer
}

# APPLE LOCAL end mainline 2005-04-05 3972515 

# Return 1 if the target supports hardware vectors of long, 0 otherwise.
#
# This can change for different subtargets so do not cache the result.

proc check_effective_target_vect_long { } {
    if { [istarget i?86-*-*]
	 || ([istarget powerpc*-*-*] && [check_effective_target_ilp32])
	 || [istarget x86_64-*-*]
	 || ([istarget sparc*-*-*] && [check_effective_target_ilp32]) } {
	set answer 1
    } else {
	set answer 0
    }

    verbose "check_effective_target_vect_long: returning $answer" 2
    return $answer
}

# Return 1 if the target supports hardware vectors of float, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_float { } {
    global et_vect_float_saved

    if [info exists et_vect_float_saved] {
	verbose "check_effective_target_vect_float: using cached result" 2
    } else {
	set et_vect_float_saved 0
	if { [istarget i?86-*-*]
	      || [istarget powerpc*-*-*]
	      || [istarget mipsisa64*-*-*]
	      || [istarget x86_64-*-*]
	      || [istarget ia64-*-*] } {
	   set et_vect_float_saved 1
	}
    }

    verbose "check_effective_target_vect_float: returning $et_vect_float_saved" 2
    return $et_vect_float_saved
}

# Return 1 if the target supports hardware vectors of double, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_double { } {
    global et_vect_double_saved

    if [info exists et_vect_double_saved] {
	verbose "check_effective_target_vect_double: using cached result" 2
    } else {
	set et_vect_double_saved 0
	if { [istarget i?86-*-*]
	      || [istarget x86_64-*-*] } {
	   set et_vect_double_saved 1
	}
    }

    verbose "check_effective_target_vect_double: returning $et_vect_double_saved" 2
    return $et_vect_double_saved
}

# Return 1 if the target plus current options does not support a vector
# max instruction, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_no_max { } {
    global et_vect_no_max_saved

    if [info exists et_vect_no_max_saved] {
	verbose "check_effective_target_vect_no_max: using cached result" 2
    } else {
	set et_vect_no_max_saved 0
	if { [istarget i?86-*-*]
	     || [istarget x86_64-*-*]
	     || [istarget sparc*-*-*]
	     || [istarget alpha*-*-*] } {
	    set et_vect_no_max_saved 1
	}
    }
    verbose "check_effective_target_vect_no_max: returning $et_vect_no_max_saved" 2
    return $et_vect_no_max_saved
}

# Return 1 if the target plus current options does not support vector
# bitwise instructions, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_no_bitwise { } {
    global et_vect_no_bitwise_saved

    if [info exists et_vect_no_bitwise_saved] {
	verbose "check_effective_target_vect_no_bitwise: using cached result" 2
    } else {
	set et_vect_no_bitwise_saved 0
    }
    verbose "check_effective_target_vect_no_bitwise: returning $et_vect_no_bitwise_saved" 2
    return $et_vect_no_bitwise_saved
}

# Return 1 if the target plus current options does not support a vector
# alignment mechanism, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_no_align { } {
    global et_vect_no_align_saved

    if [info exists et_vect_no_align_saved] {
	verbose "check_effective_target_vect_no_align: using cached result" 2
    } else {
	set et_vect_no_align_saved 0
	if { [istarget mipsisa64*-*-*]
	     || [istarget sparc*-*-*]
	     || [istarget ia64-*-*] } {
	    set et_vect_no_align_saved 1
	}
    }
    verbose "check_effective_target_vect_no_align: returning $et_vect_no_align_saved" 2
    return $et_vect_no_align_saved
}

# APPLE LOCAL begin mainline 2005-04-18 3972875
# Return 1 if the target supports vector int multiplication, 0 otherwise.

proc check_effective_target_vect_int_mult { } {
    global et_vect_int_mult_saved

    if [info exists et_vect_int_mult] {
 	verbose "check_effective_target_vect_int_mult: using cached result" 2
    } else {
 	set et_vect_int_mult_saved 0
    if { [istarget powerpc*-*-*] } {
	   set et_vect_int_mult_saved 1
	}
    }

    verbose "check_effective_target_vect_int_mult: returning $et_vect_int_mult_saved" 2
    return $et_vect_int_mult_saved
}
# APPLE LOCAL end mainline 2005-04-18 3972875
  
# Return 1 if the target matches the effective target 'arg', 0 otherwise.
# This can be used with any check_* proc that takes no argument and
# returns only 1 or 0.  It could be used with check_* procs that take
# arguments with keywords that pass particular arguments.

proc is-effective-target { arg } {
    set selected 0
    if { [info procs check_effective_target_${arg}] != [list] } {
	set selected [check_effective_target_${arg}]
    } else {
	switch $arg {
	  "vmx_hw"         { set selected [check_vmx_hw_available] }
	  "named_sections" { set selected [check_named_sections_available] }
	  "gc_sections"    { set selected [check_gc_sections_available] }
	  default          { error "unknown effective target keyword `$arg'" }
	}
    }
    verbose "is-effective-target: $arg $selected" 2
    return $selected
}

# Return 1 if the argument is an effective-target keyword, 0 otherwise.

proc is-effective-target-keyword { arg } {
    if { [info procs check_effective_target_${arg}] != [list] } {
	return 1
    } else {
	# These have different names for their check_* procs.
	switch $arg {
	  "vmx_hw"         { return 1 }
	  "named_sections" { return 1 }
	  "gc_sections"    { return 1 }
	  default          { return 0 }
	}
    }
}