1 //===-- X86InstComments.cpp - Generate verbose-asm comments for instrs ----===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This defines functionality used to emit comments about X86 instructions to
11 // an output stream for -fverbose-asm.
13 //===----------------------------------------------------------------------===//
15 #include "X86InstComments.h"
16 #include "MCTargetDesc/X86MCTargetDesc.h"
17 #include "Utils/X86ShuffleDecode.h"
18 #include "llvm/MC/MCInst.h"
19 #include "llvm/Support/raw_ostream.h"
22 //===----------------------------------------------------------------------===//
23 // Top Level Entrypoint
24 //===----------------------------------------------------------------------===//
26 /// EmitAnyX86InstComments - This function decodes x86 instructions and prints
27 /// newline terminated strings to the specified string if desired. This
28 /// information is shown in disassembly dumps when verbose assembly is enabled.
29 void llvm::EmitAnyX86InstComments(const MCInst *MI, raw_ostream &OS,
30 const char *(*getRegName)(unsigned)) {
31 // If this is a shuffle operation, the switch should fill in this state.
32 SmallVector<unsigned, 8> ShuffleMask;
33 const char *DestName = 0, *Src1Name = 0, *Src2Name = 0;
35 switch (MI->getOpcode()) {
37 Src1Name = getRegName(MI->getOperand(0).getReg());
38 Src2Name = getRegName(MI->getOperand(2).getReg());
39 DecodeINSERTPSMask(MI->getOperand(3).getImm(), ShuffleMask);
41 case X86::VINSERTPSrr:
42 DestName = getRegName(MI->getOperand(0).getReg());
43 Src1Name = getRegName(MI->getOperand(1).getReg());
44 Src2Name = getRegName(MI->getOperand(2).getReg());
45 DecodeINSERTPSMask(MI->getOperand(3).getImm(), ShuffleMask);
49 Src2Name = getRegName(MI->getOperand(2).getReg());
50 Src1Name = getRegName(MI->getOperand(0).getReg());
51 DecodeMOVLHPSMask(2, ShuffleMask);
54 Src2Name = getRegName(MI->getOperand(2).getReg());
55 Src1Name = getRegName(MI->getOperand(1).getReg());
56 DestName = getRegName(MI->getOperand(0).getReg());
57 DecodeMOVLHPSMask(2, ShuffleMask);
61 Src2Name = getRegName(MI->getOperand(2).getReg());
62 Src1Name = getRegName(MI->getOperand(0).getReg());
63 DecodeMOVHLPSMask(2, ShuffleMask);
66 Src2Name = getRegName(MI->getOperand(2).getReg());
67 Src1Name = getRegName(MI->getOperand(1).getReg());
68 DestName = getRegName(MI->getOperand(0).getReg());
69 DecodeMOVHLPSMask(2, ShuffleMask);
74 Src1Name = getRegName(MI->getOperand(1).getReg());
78 DestName = getRegName(MI->getOperand(0).getReg());
79 DecodePSHUFMask(4, MI->getOperand(MI->getNumOperands()-1).getImm(),
85 Src1Name = getRegName(MI->getOperand(1).getReg());
89 DestName = getRegName(MI->getOperand(0).getReg());
90 DecodePSHUFHWMask(MI->getOperand(MI->getNumOperands()-1).getImm(),
95 Src1Name = getRegName(MI->getOperand(1).getReg());
99 DestName = getRegName(MI->getOperand(0).getReg());
100 DecodePSHUFLWMask(MI->getOperand(MI->getNumOperands()-1).getImm(),
104 case X86::PUNPCKHBWrr:
105 Src2Name = getRegName(MI->getOperand(2).getReg());
107 case X86::PUNPCKHBWrm:
108 Src1Name = getRegName(MI->getOperand(0).getReg());
109 DecodePUNPCKHMask(16, ShuffleMask);
111 case X86::PUNPCKHWDrr:
112 Src2Name = getRegName(MI->getOperand(2).getReg());
114 case X86::PUNPCKHWDrm:
115 Src1Name = getRegName(MI->getOperand(0).getReg());
116 DecodePUNPCKHMask(8, ShuffleMask);
118 case X86::PUNPCKHDQrr:
119 Src2Name = getRegName(MI->getOperand(2).getReg());
121 case X86::PUNPCKHDQrm:
122 Src1Name = getRegName(MI->getOperand(0).getReg());
123 DecodePUNPCKHMask(4, ShuffleMask);
125 case X86::PUNPCKHQDQrr:
126 Src2Name = getRegName(MI->getOperand(2).getReg());
128 case X86::PUNPCKHQDQrm:
129 Src1Name = getRegName(MI->getOperand(0).getReg());
130 DecodePUNPCKHMask(2, ShuffleMask);
133 case X86::PUNPCKLBWrr:
134 Src2Name = getRegName(MI->getOperand(2).getReg());
136 case X86::PUNPCKLBWrm:
137 Src1Name = getRegName(MI->getOperand(0).getReg());
138 DecodePUNPCKLBWMask(16, ShuffleMask);
140 case X86::PUNPCKLWDrr:
141 Src2Name = getRegName(MI->getOperand(2).getReg());
143 case X86::PUNPCKLWDrm:
144 Src1Name = getRegName(MI->getOperand(0).getReg());
145 DecodePUNPCKLWDMask(8, ShuffleMask);
147 case X86::PUNPCKLDQrr:
148 Src2Name = getRegName(MI->getOperand(2).getReg());
150 case X86::PUNPCKLDQrm:
151 Src1Name = getRegName(MI->getOperand(0).getReg());
152 DecodePUNPCKLDQMask(4, ShuffleMask);
154 case X86::PUNPCKLQDQrr:
155 Src2Name = getRegName(MI->getOperand(2).getReg());
157 case X86::PUNPCKLQDQrm:
158 Src1Name = getRegName(MI->getOperand(0).getReg());
159 DecodePUNPCKLQDQMask(2, ShuffleMask);
163 Src2Name = getRegName(MI->getOperand(2).getReg());
166 DecodeSHUFPSMask(2, MI->getOperand(3).getImm(), ShuffleMask);
167 Src1Name = getRegName(MI->getOperand(0).getReg());
169 case X86::VSHUFPDrri:
170 Src2Name = getRegName(MI->getOperand(2).getReg());
172 case X86::VSHUFPDrmi:
173 DecodeSHUFPSMask(2, MI->getOperand(3).getImm(), ShuffleMask);
174 Src1Name = getRegName(MI->getOperand(1).getReg());
175 DestName = getRegName(MI->getOperand(0).getReg());
179 Src2Name = getRegName(MI->getOperand(2).getReg());
182 DecodeSHUFPSMask(4, MI->getOperand(3).getImm(), ShuffleMask);
183 Src1Name = getRegName(MI->getOperand(0).getReg());
185 case X86::VSHUFPSrri:
186 Src2Name = getRegName(MI->getOperand(2).getReg());
188 case X86::VSHUFPSrmi:
189 DecodeSHUFPSMask(4, MI->getOperand(3).getImm(), ShuffleMask);
190 Src1Name = getRegName(MI->getOperand(1).getReg());
191 DestName = getRegName(MI->getOperand(0).getReg());
194 case X86::UNPCKLPDrr:
195 Src2Name = getRegName(MI->getOperand(2).getReg());
197 case X86::UNPCKLPDrm:
198 DecodeUNPCKLPMask(MVT::v2f64, ShuffleMask);
199 Src1Name = getRegName(MI->getOperand(0).getReg());
201 case X86::VUNPCKLPDrr:
202 Src2Name = getRegName(MI->getOperand(2).getReg());
204 case X86::VUNPCKLPDrm:
205 DecodeUNPCKLPMask(MVT::v2f64, ShuffleMask);
206 Src1Name = getRegName(MI->getOperand(1).getReg());
207 DestName = getRegName(MI->getOperand(0).getReg());
209 case X86::VUNPCKLPDYrr:
210 Src2Name = getRegName(MI->getOperand(2).getReg());
212 case X86::VUNPCKLPDYrm:
213 DecodeUNPCKLPMask(MVT::v4f64, ShuffleMask);
214 Src1Name = getRegName(MI->getOperand(1).getReg());
215 DestName = getRegName(MI->getOperand(0).getReg());
217 case X86::UNPCKLPSrr:
218 Src2Name = getRegName(MI->getOperand(2).getReg());
220 case X86::UNPCKLPSrm:
221 DecodeUNPCKLPMask(MVT::v4f32, ShuffleMask);
222 Src1Name = getRegName(MI->getOperand(0).getReg());
224 case X86::VUNPCKLPSrr:
225 Src2Name = getRegName(MI->getOperand(2).getReg());
227 case X86::VUNPCKLPSrm:
228 DecodeUNPCKLPMask(MVT::v4f32, ShuffleMask);
229 Src1Name = getRegName(MI->getOperand(1).getReg());
230 DestName = getRegName(MI->getOperand(0).getReg());
232 case X86::VUNPCKLPSYrr:
233 Src2Name = getRegName(MI->getOperand(2).getReg());
235 case X86::VUNPCKLPSYrm:
236 DecodeUNPCKLPMask(MVT::v8f32, ShuffleMask);
237 Src1Name = getRegName(MI->getOperand(1).getReg());
238 DestName = getRegName(MI->getOperand(0).getReg());
240 case X86::UNPCKHPDrr:
241 Src2Name = getRegName(MI->getOperand(2).getReg());
243 case X86::UNPCKHPDrm:
244 DecodeUNPCKHPMask(MVT::v2f64, ShuffleMask);
245 Src1Name = getRegName(MI->getOperand(0).getReg());
247 case X86::VUNPCKHPDrr:
248 Src2Name = getRegName(MI->getOperand(2).getReg());
250 case X86::VUNPCKHPDrm:
251 DecodeUNPCKHPMask(MVT::v2f64, ShuffleMask);
252 Src1Name = getRegName(MI->getOperand(1).getReg());
253 DestName = getRegName(MI->getOperand(0).getReg());
255 case X86::VUNPCKHPDYrr:
256 Src2Name = getRegName(MI->getOperand(2).getReg());
258 case X86::VUNPCKHPDYrm:
259 DecodeUNPCKLPMask(MVT::v4f64, ShuffleMask);
260 Src1Name = getRegName(MI->getOperand(1).getReg());
261 DestName = getRegName(MI->getOperand(0).getReg());
263 case X86::UNPCKHPSrr:
264 Src2Name = getRegName(MI->getOperand(2).getReg());
266 case X86::UNPCKHPSrm:
267 DecodeUNPCKHPMask(MVT::v4f32, ShuffleMask);
268 Src1Name = getRegName(MI->getOperand(0).getReg());
270 case X86::VUNPCKHPSrr:
271 Src2Name = getRegName(MI->getOperand(2).getReg());
273 case X86::VUNPCKHPSrm:
274 DecodeUNPCKHPMask(MVT::v4f32, ShuffleMask);
275 Src1Name = getRegName(MI->getOperand(1).getReg());
276 DestName = getRegName(MI->getOperand(0).getReg());
278 case X86::VUNPCKHPSYrr:
279 Src2Name = getRegName(MI->getOperand(2).getReg());
281 case X86::VUNPCKHPSYrm:
282 DecodeUNPCKHPMask(MVT::v8f32, ShuffleMask);
283 Src1Name = getRegName(MI->getOperand(1).getReg());
284 DestName = getRegName(MI->getOperand(0).getReg());
286 case X86::VPERMILPSri:
287 DecodeVPERMILPSMask(4, MI->getOperand(2).getImm(),
289 Src1Name = getRegName(MI->getOperand(0).getReg());
291 case X86::VPERMILPSYri:
292 DecodeVPERMILPSMask(8, MI->getOperand(2).getImm(),
294 Src1Name = getRegName(MI->getOperand(0).getReg());
296 case X86::VPERMILPDri:
297 DecodeVPERMILPDMask(2, MI->getOperand(2).getImm(),
299 Src1Name = getRegName(MI->getOperand(0).getReg());
301 case X86::VPERMILPDYri:
302 DecodeVPERMILPDMask(4, MI->getOperand(2).getImm(),
304 Src1Name = getRegName(MI->getOperand(0).getReg());
306 case X86::VPERM2F128rr:
307 DecodeVPERM2F128Mask(MI->getOperand(3).getImm(), ShuffleMask);
308 Src1Name = getRegName(MI->getOperand(1).getReg());
309 Src2Name = getRegName(MI->getOperand(2).getReg());
314 // If this was a shuffle operation, print the shuffle mask.
315 if (!ShuffleMask.empty()) {
316 if (DestName == 0) DestName = Src1Name;
317 OS << (DestName ? DestName : "mem") << " = ";
319 // If the two sources are the same, canonicalize the input elements to be
320 // from the first src so that we get larger element spans.
321 if (Src1Name == Src2Name) {
322 for (unsigned i = 0, e = ShuffleMask.size(); i != e; ++i) {
323 if ((int)ShuffleMask[i] >= 0 && // Not sentinel.
324 ShuffleMask[i] >= e) // From second mask.
329 // The shuffle mask specifies which elements of the src1/src2 fill in the
330 // destination, with a few sentinel values. Loop through and print them
332 for (unsigned i = 0, e = ShuffleMask.size(); i != e; ++i) {
335 if (ShuffleMask[i] == SM_SentinelZero) {
340 // Otherwise, it must come from src1 or src2. Print the span of elements
341 // that comes from this src.
342 bool isSrc1 = ShuffleMask[i] < ShuffleMask.size();
343 const char *SrcName = isSrc1 ? Src1Name : Src2Name;
344 OS << (SrcName ? SrcName : "mem") << '[';
347 (int)ShuffleMask[i] >= 0 &&
348 (ShuffleMask[i] < ShuffleMask.size()) == isSrc1) {
353 OS << ShuffleMask[i] % ShuffleMask.size();
357 --i; // For loop increments element #.