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35 Commits

Author SHA1 Message Date
Craig Topper b8aec08819 Add more indirection to the disassembler tables to reduce amount of space used to store the operand types and encodings. Store only the unique combinations in a separate table and store indices in the instruction table. Saves about 32K of static data. 
llvm-svn: 161101
 2012-08-01 07:39:18 +00:00
Craig Topper 9caea12bd8 Use uint8_t to store the InstructionContext table. Saves 768 bytes of static data. 
llvm-svn: 161034
 2012-07-31 06:15:39 +00:00
Craig Topper 6f142746e7 Tidy up. Move for loop index declarations into for statements. Use unsigned instead of uint16_t for loop indices. Use unsigned instead of uint32_t for arguments to raw_ostream.indent. 
llvm-svn: 161033
 2012-07-31 06:02:05 +00:00
Craig Topper b61024cfcc Tidy up function argument formatting. 
llvm-svn: 161032
 2012-07-31 05:42:02 +00:00
Craig Topper 0c4253fe29 Remove trailing whitespace 
llvm-svn: 161030
 2012-07-31 05:27:01 +00:00
Craig Topper 6dedbae429 Use uint8_t instead of enums to store values in X86 disassembler table. Shaves 150k off the size of X86DisassemblerDecoder.o 
llvm-svn: 151995
 2012-03-04 02:16:41 +00:00
Craig Topper 6491c8020e X86 disassembler support for jcxz, jecxz, and jrcxz. Fixes PR11643. Patch by Kay Tiong Khoo. 
llvm-svn: 151510
 2012-02-27 01:54:29 +00:00
Ahmed Charles 636a3d618c Remove dead code. Improve llvm_unreachable text. Simplify some control flow. 
llvm-svn: 150918
 2012-02-19 11:37:01 +00:00
Benjamin Kramer 478e8de8ef Reuse the enum names from X86Desc in the X86Disassembler. 
This requires some gymnastics to make it available for C code. Remove the names
from the disassembler tables, making them relocation free.

llvm-svn: 150303
 2012-02-11 14:50:54 +00:00
Craig Topper a0cd970b81 More tweaks to get the size of the X86 disassembler tables down. 
llvm-svn: 150167
 2012-02-09 08:58:07 +00:00
Craig Topper 487e744f66 Flatten some of the arrays in the X86 disassembler tables to reduce space needed to store pointers on 64-bit hosts and reduce relocations needed at startup. Part of PR11953. 
llvm-svn: 150161
 2012-02-09 07:45:30 +00:00
David Blaikie b48ed1a4cb Remove unreachable code. (replace with llvm_unreachable to help GCC where necessary) 
llvm-svn: 148284
 2012-01-17 04:43:56 +00:00
Craig Topper f01f1b5cb9 More AVX2 instructions and their intrinsics. 
llvm-svn: 143895
 2011-11-06 23:04:08 +00:00
Craig Topper a697852386 Fix disassembling of popcntw. Also remove some code that says it accounts for 64BIT_REXW_XD not existing, but it does exist. 
llvm-svn: 141642
 2011-10-11 04:34:23 +00:00
Craig Topper 5aebebe18d Revert part of r141274. Only need to change encoding for xchg %eax, %eax in 64-bit mode. This is because in 64-bit mode xchg %eax, %eax implies zeroing the upper 32-bits of RAX which makes it not a NOP. In 32-bit mode using NOP encoding is fine. 
llvm-svn: 141353
 2011-10-07 05:35:38 +00:00
Craig Topper f18c896337 Add support in the disassembler for ignoring the L-bit on certain VEX instructions. Mark instructions that have this behavior. Fixes PR10676. 
llvm-svn: 141065
 2011-10-04 06:30:42 +00:00
Craig Topper 56ff34f7c5 Fix typo in r140954. 
llvm-svn: 140962
 2011-10-02 04:54:26 +00:00
Craig Topper 88cb33e0d4 Fix disassembler handling of CRC32 which is an odd instruction that uses 0xf2 as an opcode extension and allows the opsize prefix. This necessitated adding IC_XD_OPSIZE and IC_64BIT_XD_OPSIZE contexts. Unfortunately, this increases the size of the disassembler tables. Fixes PR10702. 
llvm-svn: 140954
 2011-10-01 19:54:56 +00:00
Peter Collingbourne 84c287e33c Move TableGen's parser and entry point into a library 
This is the first step towards splitting LLVM and Clang's tblgen executables.

llvm-svn: 140951
 2011-10-01 16:41:13 +00:00
Craig Topper 526adabe87 Don't allow 32-bit only instructions to be disassembled in 64-bit mode. Fixes part of PR10700. 
llvm-svn: 140370
 2011-09-23 06:57:25 +00:00
Craig Topper a948cb9058 Fix disassembling of PAUSE instruction. Fixes PR10900. Also fixed NOP disassembling to ignore OpSize and REX.W. 
llvm-svn: 139484
 2011-09-11 20:23:20 +00:00
Craig Topper 94ce535647 Make IC_VEX* not inherit from IC_*. Prevents instructions with no VEX form from disassembling to their non-VEX form. Also prevents weak filter collisons that were keeping valid VEX instructions from decoding properly. Make VEX_L* not inherit from VEX_* because the VEX.L bit always important. This stops packed int VEX encodings from being disassembled when specified with VEX.L=1. Fixes PR10831 and PR10806. 
llvm-svn: 138997
 2011-09-02 04:17:54 +00:00
Craig Topper 76e3e0b554 Give ATTR_VEX higher priority when generating the disassembler context table. Fixes disassembling of VEX instructions with 'pp'=00. Fixes subset of PR10678. 
llvm-svn: 138552
 2011-08-25 07:42:00 +00:00
Joerg Sonnenberger fc4789da4a Add support for the VIA PadLock instructions. 
llvm-svn: 128826
 2011-04-04 16:58:13 +00:00
Joerg Sonnenberger c94780c539 Use array_lengthof 
llvm-svn: 128823
 2011-04-04 16:25:38 +00:00
Joerg Sonnenberger fb3bce155e Change loops to derive the number of tables automatically 
llvm-svn: 128818
 2011-04-04 14:42:22 +00:00
Sean Callanan c3fd523731 X86 table-generator and disassembler support for the AVX 
instruction set.  This code adds support for the VEX prefix
and for the YMM registers accessible on AVX-enabled
architectures.  Instruction table support that enables AVX
instructions for the disassembler is in an upcoming patch.

llvm-svn: 127644
 2011-03-15 01:23:15 +00:00
Benjamin Kramer 34402c4fe4 Constify another 2 disassembler tables. 
llvm-svn: 117208
 2010-10-23 09:28:42 +00:00
Benjamin Kramer de0a4fbf3b Make the disassembler tables const so they end up in read-only memory. 
llvm-svn: 117206
 2010-10-23 09:10:44 +00:00
Benjamin Kramer 9192e7ab12 Make some symbols static, move classes into anonymous namespaces. 
llvm-svn: 117111
 2010-10-22 17:35:07 +00:00
Dan Gohman b29cda9b3c Fix a bunch of namespace polution. 
llvm-svn: 101376
 2010-04-15 17:08:50 +00:00
Daniel Dunbar c7dccd8ad2 Suppress compiler warning. 
llvm-svn: 91959
 2009-12-23 00:45:10 +00:00
Nuno Lopes 91b866a163 fix build and while at it remove a redudant include 
llvm-svn: 91774
 2009-12-19 11:52:18 +00:00
Daniel Dunbar 3a821f7f0c More bzero -> memset that I missed. 
llvm-svn: 91757
 2009-12-19 04:16:57 +00:00
Sean Callanan 04cc307edd Table-driven disassembler for the X86 architecture (16-, 32-, and 64-bit 
incarnations), integrated into the MC framework.  

The disassembler is table-driven, using a custom TableGen backend to 
generate hierarchical tables optimized for fast decode.  The disassembler 
consumes MemoryObjects and produces arrays of MCInsts, adhering to the 
abstract base class MCDisassembler (llvm/MC/MCDisassembler.h).

The disassembler is documented in detail in

- lib/Target/X86/Disassembler/X86Disassembler.cpp (disassembler runtime)
- utils/TableGen/DisassemblerEmitter.cpp (table emitter)

You can test the disassembler by running llvm-mc -disassemble for i386
or x86_64 targets.  Please let me know if you encounter any problems
with it.

llvm-svn: 91749
 2009-12-19 02:59:52 +00:00