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authorH.J. Lu <hjl.tools@gmail.com>2020-10-05 05:23:29 -0700
committerH.J. Lu <hjl.tools@gmail.com>2020-10-05 05:23:39 -0700
commit0e9f3bf12616b108682bb6f6e2a5ef04df9586a8 (patch)
treefed8d852a0d65cf6b461151725aaa817369d2f8d /binutils
parentb58e7f729ebd85ff62a29357a01c15a29d458829 (diff)
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x86: Clear modrm if not needed
The MODRM byte can be checked to display the instruction name only if the MODRM byte needed. Clear modrm if the MODRM byte isn't needed so that modrm field checks in putop like, modrm.mod == N with N != 0, can be done without checking need_modrm. gas/ PR binutils/26705 * testsuite/gas/i386/x86-64-suffix.s: Add "mov %rsp,%rbp" before sysretq. * testsuite/gas/i386/x86-64-suffix-intel.d: Updated. * testsuite/gas/i386/x86-64-suffix.d: Likewise. opcodes/ PR binutils/26705 * i386-dis.c (print_insn): Clear modrm if not needed. (putop): Check need_modrm for modrm.mod != 3. Don't check need_modrm for modrm.mod == 3.
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