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s390: Add brasl edge test cases from ESA to z/Architecture

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The ESA opcode test cases for IBM z900 contain a few edge cases. They
exercise the brasl mnemonic with its largest allowed negative and
positive offsets. Linux on zSeries in ESA mode executes in 31-bit
addressing mode. Therefore the ESA test cases are assembled with -m31.
In 31-bit addressing mode the address computation using those large
offsets wraps, which is correctly reflected in the disassembly.

Linux on Z in z/Architecture mode executes in 64-bit addressing mode.
Therefore the z/Architecture (zarch) test cases are assembled with -m64.
In 64-bit addressing mode the address computation using those large
offsets does not necessarily wrap.

gas/
	* testsuite/gas/s390/zarch-z900.s: Add brasl tests from ESA that
	  exercise edge cases.
	* testsuite/gas/s390/zarch-z900.d: Likewise.

Signed-off-by: Jens Remus <jremus@linux.ibm.com>
Reviewed-by: Andreas Krebbel <krebbel@linux.ibm.com>
This commit is contained in:
Jens Remus 2023-11-23 15:44:41 +01:00 committed by Andreas Krebbel
parent 9c422a5995
commit 3f3c1e513b
2 changed files with 12 additions and 0 deletions
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6
gas/testsuite/gas/s390/zarch-z900.d
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@ -149,4 +149,10 @@ Disassembly of section .text:
.*: eb 96 5f ff 00 0f [ ]*tracg %r9,%r6,4095\(%r5\)
.*: e3 95 af ff 00 82 [ ]*xg %r9,4095\(%r5,%r10\)
.*: b9 82 00 96 [ ]*xgr %r9,%r6
*([\da-f]+): c0 65 00 00 00 00 [ ]*brasl %r6,\1 <foo\+0x\1>
*([\da-f]+): c0 65 00 00 00 00 [ ]*brasl %r6,\1 <foo\+0x\1>
*([\da-f]+): c0 65 80 00 00 00 [ ]*brasl %r6,ffffffff0+\1 <foo\+0xffffffff0+\1>
*([\da-f]+): c0 65 80 00 00 00 [ ]*brasl %r6,ffffffff0+\1 <foo\+0xffffffff0+\1>
.*: c0 65 7f ff ff ff [ ]*brasl %r6,1000002d0 <foo\+0x1000002d0>
.*: c0 65 7f ff ff ff [ ]*brasl %r6,1000002d6 <foo\+0x1000002d6>
.*: 07 07 [ ]*nopr %r7

6
gas/testsuite/gas/s390/zarch-z900.s
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@ -143,3 +143,9 @@ foo:
tracg %r9,%r6,4095(%r5)
xg %r9,4095(%r5,%r10)
xgr %r9,%r6
brasl %r6,.
jasl %r6,.
brasl %r6,.-0x100000000
jasl %r6,.-0x100000000
brasl %r6,.+0xfffffffe
jasl %r6,.+0xfffffffe