[Bug binutils/23025] New: inconsistent disassemble of vcvtpd2dq

[herumi at nifty dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23025

            Bug ID: 23025
           Summary: inconsistent disassemble of vcvtpd2dq
           Product: binutils
           Version: 2.30
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: herumi at nifty dot com
  Target Milestone: ---

Created attachment 10930
  --> https://sourceware.org/bugzilla/attachment.cgi?id=10930&action=edit
target binary for disassemble

objdump(version 2.3.0) shows inconsistent disassemble of vcvtpd2dq.

The results differ before and after the byte sequence 67 62 f1 ff 18 e6 40 04 .

% od -tx1 -Ax vcvtpd2dq.bin
000000 67 c5 fb e6 40 20 67 c5 ff e6 40 20 67 62 f1 ff
000010 18 e6 40 04 67 c5 fb e6 40 20 67 c5 ff e6 40 20

% objdump -M x86-64 -D -b binary -m i386 vcvtpd2dq.bin

vcvtpd2dq.bin:     file format binary

Disassembly of section .data:

00000000 <.data>:
   0:   67 c5 fb e6 40 20       vcvtpd2dqx 0x20(%eax),%xmm0      ; (X)
   6:   67 c5 ff e6 40 20       vcvtpd2dqy 0x20(%eax),%xmm0      ; (Y)
   c:   67 62 f1 ff 18 e6 40    vcvtpd2dq 0x20(%eax){1to2},%xmm0 ; (Z)
  13:   04
  14:   67 c5 fb e6 40 20       vcvtpd2dq 0x20(%eax),%xmm0       ; (X')
  1a:   67 c5 ff e6 40 20       vcvtpd2dq 0x20(%eax),%xmm0       ; (Y')

The results for (X) and (X'), for (Y) and (Y') should be same.
Strangely, the results are correct if the byte sequence for (Z) is omitted.

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