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power10 on ppc32

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We don't support power10 on ppc32, mainly because some instructions
have 34-bit fields for which we don't have relocations on ppc32.
If you try to assemble typical code, you'll see errors saying
"reloc ... not supported by object file format".  Also, on 32-bit
hosts with binutils configured without a 64-bit bfd, you'll see errors
saying "bignum invalid" when using large offsets.  But let's not kill
output of prefix insns entirely on 32-bit hosts.

	* config/tc-ppc.c (md_assemble): Emit prefix insn by parts when
	valueT is smaller than 64 bits.
This commit is contained in:
Alan Modra 2020-09-09 22:10:47 +09:30
parent 6a1ed9106f
commit 15a32af52f
2 changed files with 7 additions and 1 deletions
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5
gas/ChangeLog
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@ -1,3 +1,8 @@
2020-09-09 Alan Modra <amodra@gmail.com>
* config/tc-ppc.c (md_assemble): Emit prefix insn by parts when
valueT is smaller than 64 bits.
2020-09-07 Cooper Qu <cooper.qu@linux.alibaba.com>
* config/tc-csky.c (CSKYV2_ISA_DSP): CSKY_ISA_DSPE60.

3
gas/config/tc-ppc.c
View File

@ -3882,7 +3882,8 @@ md_assemble (char *str)
/* The prefix part of an 8-byte instruction always occupies the lower
addressed word in a doubleword, regardless of endianness. */
if (!target_big_endian && insn_length == 8)
if (insn_length == 8
&& (sizeof (insn) > sizeof (valueT) || !target_big_endian))
{
md_number_to_chars (f, PPC_GET_PREFIX (insn), 4);
md_number_to_chars (f + 4, PPC_GET_SUFFIX (insn), 4);