gas-test.scm from Gdb at Krugle
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; CPU description file generator for the GNU assembler testsuite.
; Copyright (C) 2000, 2001 Red Hat, Inc.
; This file is part of CGEN.
; See file COPYING.CGEN for details.
; This is invoked to build allinsn.exp and a script to run to
; generate allinsn.s and allinsn.d.
; Specify which application.
(set! APPLICATION 'GAS-TEST)
; Called before/after the .cpu file has been read.
(define (gas-test-init!) (opcodes-init!))
(define (gas-test-finish!) (opcodes-finish!))
; Called after .cpu file has been read and global error checks are done.
; We use the `tmp' member to record the syntax split up into its components.
(define (gas-test-analyze!)
(opcodes-analyze!)
(map (lambda (insn)
(elm-xset! insn 'tmp (syntax-break-out (insn-syntax insn))))
(non-multi-insns (current-insn-list)))
*UNSPECIFIED*
)
; Methods to compute test data.
; The result is a list of strings to be inserted in the assembler
; in the operand's position.
; For a general assembler operand, just turn the value into a string.
(method-make!
<hw-asm> 'test-data
(lambda (self ops)
(map number->string ops))
)
; For a keyword operand, choose the appropriate keyword.
(method-make!
<keyword> 'test-data
(lambda (self ops)
(let* ((test-cases (elm-get self 'values))
(prefix (elm-get self 'prefix)))
(map (lambda (n)
(string-append
(if (and (not (string=? prefix ""))
(eq? (string-ref prefix 0) #\$))
"\\" "")
prefix
(car (list-ref test-cases n))))
ops)))
)
(method-make!
<hw-address> 'test-data
(lambda (self ops)
(let* ((test-cases '("foodata" "4" "footext" "-4"))
(n (length ops))
(selection (map (lambda (z) (random (length test-cases))) (iota n))))
(map (lambda (n) (list-ref test-cases n)) selection)))
)
(method-make!
<hw-iaddress> 'test-data
(lambda (self ops)
(let* ((test-cases '("footext" "4" "foodata" "-4"))
(n (length ops))
(selection (map (lambda (z) (random (length test-cases))) (iota n))))
(map (lambda (n) (list-ref test-cases n)) selection)))
)
(method-make-forward! <hw-register> 'indices '(test-data))
(method-make-forward! <hw-immediate> 'values '(test-data))
; Test data for a field is chosen firstly out of some bit patterns,
; then randomly. It is then interpreted based on whether there
; is a decode method.
(method-make!
<ifield> 'test-data
(lambda (self n)
(let* ((bf-len (ifld-length self))
(field-max (inexact->exact (round (expt 2 bf-len))))
(highbit (quotient field-max 2))
(values (map (lambda (n)
(case n
((0) 0)
((1) (- field-max 1))
((2) highbit)
((3) (- highbit 1))
((4) 1)
(else (random field-max))))
(iota n)))
(decode (ifld-decode self)))
(if decode
; FIXME: need to run the decoder.
values
; no decode method
(case (mode:class (ifld-mode self))
((INT) (map (lambda (n) (if (>= n highbit) (- n field-max) n))
values))
((UINT) values)
(else (error "unsupported mode class"
(mode:class (ifld-mode self))))))))
)
(method-make!
<hw-index> 'test-data
(lambda (self n)
(case (hw-index:type self)
((ifield operand) (send (hw-index:value self) 'test-data n))
((constant) (hw-index:value self))
(else nil)))
)
(method-make!
<operand> 'test-data
(lambda (self n)
(send (op:type self) 'test-data (send (op:index self) 'test-data n)))
)
; Given an operand, return a set of N test data.
; e.g. For a keyword operand, return a random subset.
; For a number, return N numbers.
(define (operand-test-data op n)
(send op 'test-data n)
)
; Given the broken out assembler syntax string, return the list of operand
; objects.
(define (extract-operands syntax-list)
(let loop ((result nil) (l syntax-list))
(cond ((null? l) (reverse! result))
((object? (car l)) (loop (cons (car l) result) (cdr l)))
(else (loop result (cdr l)))))
)
; Collate a list of operands into a test test.
; Input is a list of operand lists. Returns a collated set of test
; inputs. For example:
; ((r0 r1 r2) (r3 r4 r5) (2 3 8)) => ((r0 r3 2) (r1 r4 3) (r2 r5 8))
(define (-collate-test-set L)
(if (=? (length (car L)) 0)
'()
(cons (map car L)
(-collate-test-set (map cdr L))))
)
; Given a list of operands for an instruction, return the test set
; (all possible combinations).
; N is the number of testcases for each operand.
; The result has N to-the-power (length OP-LIST) elements.
(define (build-test-set op-list n)
(let ((test-data (map (lambda (op) (operand-test-data op n)) op-list))
(len (length op-list)))
(cond ((=? len 0) (list (list)))
(else (-collate-test-set test-data))))
)
; Given an assembler expression and a set of operands build a testcase.
; TEST-DATA is a list of strings, one element per operand.
(define (build-asm-testcase syntax-list test-data)
(let loop ((result nil) (sl syntax-list) (td test-data))
;(display (list result sl td "\n"))
(cond ((null? sl)
(string-append "\t"
(apply string-append (reverse result))
"\n"))
((string? (car sl))
(loop (cons (car sl) result) (cdr sl) td))
(else (loop (cons (car td) result) (cdr sl) (cdr td)))))
)
; Generate the testsuite for INSN.
; FIXME: make the number of cases an argument to this application.
(define (gen-gas-test insn)
(logit 2 "Generating gas test data for " (obj:name insn) " ...\n")
(string-append
"\t.text\n"
"\t.global " (gen-sym insn) "\n"
(gen-sym insn) ":\n"
(let* ((syntax-list (insn-tmp insn))
(op-list (extract-operands syntax-list))
(test-set (build-test-set op-list 8)))
(string-map (lambda (test-data)
(build-asm-testcase syntax-list test-data))
test-set))
)
)
; Generate the shell script that builds the .d file.
; .d files contain the objdump result that is used to see whether the
; testcase passed.
; We do this by running gas and objdump.
; Obviously this isn't quite right - bugs in gas or
; objdump - the things we're testing - will cause an incorrect testsuite to
; be built and thus the bugs will be missed. It is *not* intended that this
; be run immediately before running the testsuite! Rather, this is run to
; generate the testsuite which is then inspected for accuracy and checked
; into CVS. As bugs in the testsuite are found they are corrected by hand.
; Or if they're due to bugs in the generator the generator can be rerun and
; the output diff'd to ensure no errors have crept back in.
; The point of doing things this way is TO SAVE A HELL OF A LOT OF TYPING!
; Clearly some hand generated testcases will also be needed, but this
; provides a good test for each instruction.
(define (cgen-build.sh)
(logit 1 "Generating gas-build.sh ...\n")
(string-append
"\
#/bin/sh
# Generate test result data for " (current-arch-name) " GAS testing.
# This script is machine generated.
# It is intended to be run in the testsuite source directory.
#
# Syntax: build.sh /path/to/build/gas
if [ $# = 0 ] ; then
if [ ! -x ../gas/as-new ] ; then
echo \"Usage: $0 [/path/to/gas/build]\"
else
BUILD=`pwd`/../gas
fi
else
BUILD=$1
fi
if [ ! -x $BUILD/as-new ] ; then
echo \"$BUILD is not a gas build directory\"
exit 1
fi
# Put results here, so we preserve the existing set for comparison.
rm -rf tmpdir
mkdir tmpdir
cd tmpdir
function gentest {
rm -f a.out
$BUILD/as-new ${1}.s -o a.out
echo \"#as:\" >${1}.d
echo \"#objdump: -dr\" >>${1}.d
echo \"#name: $1\" >>${1}.d
$BUILD/../binutils/objdump -dr a.out | \
sed -e 's/(/\\\\(/g' \
-e 's/)/\\\\)/g' \
-e 's/\\$/\\\\$/g' \
-e 's/\\[/\\\\\\[/g' \
-e 's/\\]/\\\\\\]/g' \
-e 's/[+]/\\\\+/g' \
-e 's/[.]/\\\\./g' \
-e 's/[*]/\\\\*/g' | \
sed -e 's/^.*file format.*$/.*: +file format .*/' \
>>${1}.d
rm -f a.out
}
# Now come all the testcases.
cat > allinsn.s <<EOF
.data
foodata: .word 42
.text
footext:\n"
(string-map (lambda (insn)
(gen-gas-test insn))
(non-multi-insns (current-insn-list)))
"EOF\n"
"\n"
"# Finally, generate the .d file.\n"
"gentest allinsn\n"
)
)
; Generate the dejagnu allinsn.exp file that drives the tests.
(define (cgen-allinsn.exp)
(logit 1 "Generating allinsn.exp ...\n")
(string-append
"\
# " (string-upcase (current-arch-name)) " assembler testsuite. -*- Tcl -*-
if [istarget " (current-arch-name) "*-*-*] {
run_dump_test \"allinsn\"
}\n"
)
)
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