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| author | H.J. Lu <hjl.tools@gmail.com> | 2018-07-22 12:00:39 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2018-07-22 12:00:39 -0700 |
| commit | c7213af9b3e47d3341f95fe24549681029a53853 (patch) | |
| tree | 19c67f5fe49cc8756f6e81d57cc1faf4246561fd | |
| parent | 17cbafdbbef78d7e05ade53d4cc867fa8ac2f432 (diff) | |
| download | gdb-c7213af9b3e47d3341f95fe24549681029a53853.zip gdb-c7213af9b3e47d3341f95fe24549681029a53853.tar.gz gdb-c7213af9b3e47d3341f95fe24549681029a53853.tar.bz2 | |
x86: Determine vector length from the last vector operand
Determine VEX/EVEXE vector length from the last multi-length vector
operand.
* config/tc-i386.c (build_vex_prefix): Determine vector
length from the last multi-length vector operand.
(build_evex_prefix): Likewise.
| -rw-r--r-- | gas/ChangeLog | 6 | ||||
| -rw-r--r-- | gas/config/tc-i386.c | 35 |
2 files changed, 31 insertions, 10 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog index 3253a9f..5df35569 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,9 @@ +2018-07-22 H.J. Lu <hongjiu.lu@intel.com> + + * config/tc-i386.c (build_vex_prefix): Determine vector + length from the last multi-length vector operand. + (build_evex_prefix): Likewise. + 2018-07-20 H.J. Lu <hongjiu.lu@intel.com> * config/tc-i386.c (match_simd_size): Break long line. diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index c4ccffc..575b017 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -3363,10 +3363,12 @@ build_vex_prefix (const insn_template *t) vector_length = 1; else { - unsigned int op; + int op; + /* Determine vector length from the last multi-length vector + operand. */ vector_length = 0; - for (op = 0; op < t->operands; ++op) + for (op = t->operands - 1; op >= 0; op--) if (t->operand_types[op].bitfield.xmmword && t->operand_types[op].bitfield.ymmword && i.types[op].bitfield.ymmword) @@ -3611,20 +3613,31 @@ build_evex_prefix (void) if (!i.tm.opcode_modifier.evex || i.tm.opcode_modifier.evex == EVEXDYN) { - unsigned int op; + int op; + /* Determine vector length from the last multi-length vector + operand. */ vec_length = 0; - for (op = 0; op < i.tm.operands; ++op) + for (op = i.operands - 1; op >= 0; op--) if (i.tm.operand_types[op].bitfield.xmmword + i.tm.operand_types[op].bitfield.ymmword + i.tm.operand_types[op].bitfield.zmmword > 1) { if (i.types[op].bitfield.zmmword) - i.tm.opcode_modifier.evex = EVEX512; + { + i.tm.opcode_modifier.evex = EVEX512; + break; + } else if (i.types[op].bitfield.ymmword) - i.tm.opcode_modifier.evex = EVEX256; + { + i.tm.opcode_modifier.evex = EVEX256; + break; + } else if (i.types[op].bitfield.xmmword) - i.tm.opcode_modifier.evex = EVEX128; + { + i.tm.opcode_modifier.evex = EVEX128; + break; + } else if (i.broadcast && (int) op == i.broadcast->operand) { switch ((i.tm.operand_types[op].bitfield.dword ? 4 : 8) @@ -3640,12 +3653,14 @@ build_evex_prefix (void) i.tm.opcode_modifier.evex = EVEX128; break; default: - continue; + abort (); } + break; } - continue; - break; } + + if (op < 0) + abort (); } switch (i.tm.opcode_modifier.evex) |