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 DecodeSHUFPMask(MVT::v2f64, MI->getOperand(MI->getNumOperands()-1).getImm(),
168 Src1Name = getRegName(MI->getOperand(0).getReg());
170 case X86::VSHUFPDrri:
171 Src2Name = getRegName(MI->getOperand(2).getReg());
173 case X86::VSHUFPDrmi:
174 DecodeSHUFPMask(MVT::v2f64, MI->getOperand(MI->getNumOperands()-1).getImm(),
176 Src1Name = getRegName(MI->getOperand(1).getReg());
177 DestName = getRegName(MI->getOperand(0).getReg());
179 case X86::VSHUFPDYrri:
180 Src2Name = getRegName(MI->getOperand(2).getReg());
182 case X86::VSHUFPDYrmi:
183 DecodeSHUFPMask(MVT::v4f64, MI->getOperand(MI->getNumOperands()-1).getImm(),
185 Src1Name = getRegName(MI->getOperand(1).getReg());
186 DestName = getRegName(MI->getOperand(0).getReg());
190 Src2Name = getRegName(MI->getOperand(2).getReg());
193 DecodeSHUFPMask(MVT::v4f32, MI->getOperand(MI->getNumOperands()-1).getImm(),
195 Src1Name = getRegName(MI->getOperand(0).getReg());
197 case X86::VSHUFPSrri:
198 Src2Name = getRegName(MI->getOperand(2).getReg());
200 case X86::VSHUFPSrmi:
201 DecodeSHUFPMask(MVT::v4f32, MI->getOperand(MI->getNumOperands()-1).getImm(),
203 Src1Name = getRegName(MI->getOperand(1).getReg());
204 DestName = getRegName(MI->getOperand(0).getReg());
206 case X86::VSHUFPSYrri:
207 Src2Name = getRegName(MI->getOperand(2).getReg());
209 case X86::VSHUFPSYrmi:
210 DecodeSHUFPMask(MVT::v8f32, MI->getOperand(MI->getNumOperands()-1).getImm(),
212 Src1Name = getRegName(MI->getOperand(1).getReg());
213 DestName = getRegName(MI->getOperand(0).getReg());
216 case X86::UNPCKLPDrr:
217 Src2Name = getRegName(MI->getOperand(2).getReg());
219 case X86::UNPCKLPDrm:
220 DecodeUNPCKLPMask(MVT::v2f64, ShuffleMask);
221 Src1Name = getRegName(MI->getOperand(0).getReg());
223 case X86::VUNPCKLPDrr:
224 Src2Name = getRegName(MI->getOperand(2).getReg());
226 case X86::VUNPCKLPDrm:
227 DecodeUNPCKLPMask(MVT::v2f64, ShuffleMask);
228 Src1Name = getRegName(MI->getOperand(1).getReg());
229 DestName = getRegName(MI->getOperand(0).getReg());
231 case X86::VUNPCKLPDYrr:
232 Src2Name = getRegName(MI->getOperand(2).getReg());
234 case X86::VUNPCKLPDYrm:
235 DecodeUNPCKLPMask(MVT::v4f64, ShuffleMask);
236 Src1Name = getRegName(MI->getOperand(1).getReg());
237 DestName = getRegName(MI->getOperand(0).getReg());
239 case X86::UNPCKLPSrr:
240 Src2Name = getRegName(MI->getOperand(2).getReg());
242 case X86::UNPCKLPSrm:
243 DecodeUNPCKLPMask(MVT::v4f32, ShuffleMask);
244 Src1Name = getRegName(MI->getOperand(0).getReg());
246 case X86::VUNPCKLPSrr:
247 Src2Name = getRegName(MI->getOperand(2).getReg());
249 case X86::VUNPCKLPSrm:
250 DecodeUNPCKLPMask(MVT::v4f32, ShuffleMask);
251 Src1Name = getRegName(MI->getOperand(1).getReg());
252 DestName = getRegName(MI->getOperand(0).getReg());
254 case X86::VUNPCKLPSYrr:
255 Src2Name = getRegName(MI->getOperand(2).getReg());
257 case X86::VUNPCKLPSYrm:
258 DecodeUNPCKLPMask(MVT::v8f32, ShuffleMask);
259 Src1Name = getRegName(MI->getOperand(1).getReg());
260 DestName = getRegName(MI->getOperand(0).getReg());
262 case X86::UNPCKHPDrr:
263 Src2Name = getRegName(MI->getOperand(2).getReg());
265 case X86::UNPCKHPDrm:
266 DecodeUNPCKHPMask(MVT::v2f64, ShuffleMask);
267 Src1Name = getRegName(MI->getOperand(0).getReg());
269 case X86::VUNPCKHPDrr:
270 Src2Name = getRegName(MI->getOperand(2).getReg());
272 case X86::VUNPCKHPDrm:
273 DecodeUNPCKHPMask(MVT::v2f64, ShuffleMask);
274 Src1Name = getRegName(MI->getOperand(1).getReg());
275 DestName = getRegName(MI->getOperand(0).getReg());
277 case X86::VUNPCKHPDYrr:
278 Src2Name = getRegName(MI->getOperand(2).getReg());
280 case X86::VUNPCKHPDYrm:
281 DecodeUNPCKLPMask(MVT::v4f64, ShuffleMask);
282 Src1Name = getRegName(MI->getOperand(1).getReg());
283 DestName = getRegName(MI->getOperand(0).getReg());
285 case X86::UNPCKHPSrr:
286 Src2Name = getRegName(MI->getOperand(2).getReg());
288 case X86::UNPCKHPSrm:
289 DecodeUNPCKHPMask(MVT::v4f32, ShuffleMask);
290 Src1Name = getRegName(MI->getOperand(0).getReg());
292 case X86::VUNPCKHPSrr:
293 Src2Name = getRegName(MI->getOperand(2).getReg());
295 case X86::VUNPCKHPSrm:
296 DecodeUNPCKHPMask(MVT::v4f32, ShuffleMask);
297 Src1Name = getRegName(MI->getOperand(1).getReg());
298 DestName = getRegName(MI->getOperand(0).getReg());
300 case X86::VUNPCKHPSYrr:
301 Src2Name = getRegName(MI->getOperand(2).getReg());
303 case X86::VUNPCKHPSYrm:
304 DecodeUNPCKHPMask(MVT::v8f32, ShuffleMask);
305 Src1Name = getRegName(MI->getOperand(1).getReg());
306 DestName = getRegName(MI->getOperand(0).getReg());
308 case X86::VPERMILPSri:
309 Src1Name = getRegName(MI->getOperand(1).getReg());
311 case X86::VPERMILPSmi:
312 DecodeVPERMILPSMask(4, MI->getOperand(MI->getNumOperands()-1).getImm(),
314 DestName = getRegName(MI->getOperand(0).getReg());
316 case X86::VPERMILPSYri:
317 Src1Name = getRegName(MI->getOperand(1).getReg());
319 case X86::VPERMILPSYmi:
320 DecodeVPERMILPSMask(8, MI->getOperand(MI->getNumOperands()-1).getImm(),
322 DestName = getRegName(MI->getOperand(0).getReg());
324 case X86::VPERMILPDri:
325 Src1Name = getRegName(MI->getOperand(1).getReg());
327 case X86::VPERMILPDmi:
328 DecodeVPERMILPDMask(2, MI->getOperand(MI->getNumOperands()-1).getImm(),
330 DestName = getRegName(MI->getOperand(0).getReg());
332 case X86::VPERMILPDYri:
333 Src1Name = getRegName(MI->getOperand(1).getReg());
335 case X86::VPERMILPDYmi:
336 DecodeVPERMILPDMask(4, MI->getOperand(MI->getNumOperands()-1).getImm(),
338 DestName = getRegName(MI->getOperand(0).getReg());
340 case X86::VPERM2F128rr:
341 case X86::VPERM2I128rr:
342 Src2Name = getRegName(MI->getOperand(2).getReg());
344 case X86::VPERM2F128rm:
345 case X86::VPERM2I128rm:
346 DecodeVPERM2F128Mask(MI->getOperand(MI->getNumOperands()-1).getImm(),
348 Src1Name = getRegName(MI->getOperand(1).getReg());
349 DestName = getRegName(MI->getOperand(0).getReg());
354 // If this was a shuffle operation, print the shuffle mask.
355 if (!ShuffleMask.empty()) {
356 if (DestName == 0) DestName = Src1Name;
357 OS << (DestName ? DestName : "mem") << " = ";
359 // If the two sources are the same, canonicalize the input elements to be
360 // from the first src so that we get larger element spans.
361 if (Src1Name == Src2Name) {
362 for (unsigned i = 0, e = ShuffleMask.size(); i != e; ++i) {
363 if ((int)ShuffleMask[i] >= 0 && // Not sentinel.
364 ShuffleMask[i] >= e) // From second mask.
369 // The shuffle mask specifies which elements of the src1/src2 fill in the
370 // destination, with a few sentinel values. Loop through and print them
372 for (unsigned i = 0, e = ShuffleMask.size(); i != e; ++i) {
375 if (ShuffleMask[i] == SM_SentinelZero) {
380 // Otherwise, it must come from src1 or src2. Print the span of elements
381 // that comes from this src.
382 bool isSrc1 = ShuffleMask[i] < ShuffleMask.size();
383 const char *SrcName = isSrc1 ? Src1Name : Src2Name;
384 OS << (SrcName ? SrcName : "mem") << '[';
387 (int)ShuffleMask[i] >= 0 &&
388 (ShuffleMask[i] < ShuffleMask.size()) == isSrc1) {
393 OS << ShuffleMask[i] % ShuffleMask.size();
397 --i; // For loop increments element #.