derek/gem5
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ARM: Decode neon memory instructions.

Browse Source
This commit is contained in:
Ali Saidi
2010-08-23 11:18:40 -05:00
parent d1362d582a
commit fc1730044e
1 changed files with 95 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

104
src/arch/arm/isa/formats/fp.isa
View File

@@ -65,27 +65,113 @@ let {{
if (l) {
// Load instructions.
if (a) {
switch (b) {
if (bits(b, 3, 2) != 3) {
switch (bits(b, 1, 0)) {
case 0x0:
return new WarnUnimplemented("vld1 single", machInst);
case 0x1:
return new WarnUnimplemented("vld2 single", machInst);
case 0x2:
return new WarnUnimplemented("vld3 single", machInst);
case 0x3:
return new WarnUnimplemented("vld4 single", machInst);
}
} else {
switch (bits(b, 1, 0)) {
case 0x0:
return new WarnUnimplemented("vld1 single all",
machInst);
case 0x1:
return new WarnUnimplemented("vld2 single all",
machInst);
case 0x2:
return new WarnUnimplemented("vld3 single all",
machInst);
case 0x3:
return new WarnUnimplemented("vld4 single all",
machInst);
}
}
// Single.
} else {
switch (b) {
switch (bits(b, 3, 1)) {
case 0x0:
return new WarnUnimplemented("vld4 multiple", machInst);
case 0x2:
return new WarnUnimplemented("vld3 multiple", machInst);
case 0x3:
return new WarnUnimplemented("vld1 multiple", machInst);
case 0x4:
return new WarnUnimplemented("vld2 multiple", machInst);
case 0x1:
if (b & 0x1) {
return new WarnUnimplemented("vld2 multiple", machInst);
} else {
return new WarnUnimplemented("vld1 multiple", machInst);
}
case 0x5:
if ((b & 0x1) == 0) {
return new WarnUnimplemented("vld1 multiple", machInst);
} else {
break;
}
}
// Multiple.
}
} else {
// Store instructions.
if (a) {
switch (b) {
if (bits(b, 3, 2) != 3) {
switch (bits(b, 1, 0)) {
case 0x0:
return new WarnUnimplemented("vst1 single", machInst);
case 0x1:
return new WarnUnimplemented("vst2 single", machInst);
case 0x2:
return new WarnUnimplemented("vst3 single", machInst);
case 0x3:
return new WarnUnimplemented("vst4 single", machInst);
}
} else {
switch (bits(b, 1, 0)) {
case 0x0:
return new WarnUnimplemented("vst1 single all",
machInst);
case 0x1:
return new WarnUnimplemented("vst2 single all",
machInst);
case 0x2:
return new WarnUnimplemented("vst3 single all",
machInst);
case 0x3:
return new WarnUnimplemented("vst4 single all",
machInst);
}
}
// Single.
} else {
switch (b) {
switch (bits(b, 3, 1)) {
case 0x0:
return new WarnUnimplemented("vst4 multiple", machInst);
case 0x2:
return new WarnUnimplemented("vst3 multiple", machInst);
case 0x3:
return new WarnUnimplemented("vst1 multiple", machInst);
case 0x4:
return new WarnUnimplemented("vst2 multiple", machInst);
case 0x1:
if (b & 0x1) {
return new WarnUnimplemented("vst2 multiple", machInst);
} else {
return new WarnUnimplemented("vst1 multiple", machInst);
}
case 0x5:
if ((b & 0x1) == 0) {
return new WarnUnimplemented("vst1 multiple", machInst);
} else {
break;
}
}
// Multiple.
}
}
return new WarnUnimplemented("neon memory", machInst);
return new Unknown(machInst);
}
'''