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disassembler addv instruction (#20776)

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Walter Bright 2025-01-25 03:29:48 -08:00 • committed by GitHub
parent ab76473eb7
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1 changed files with 13 additions and 3 deletions
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16
compiler/src/dmd/backend/arm/disasmarm.d
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@ -1857,12 +1857,21 @@ void disassemble(uint c) @trusted
uint Rd = field(ins, 4, 0);
//printf("ins:%08x Q:%d U:%d size:%d opcode:%x Rn:%d Rd:%d\n", ins, Q, U, size, opcode, Rn, Rd);
if (U == 1 && opcode == 3)
immutable string[8] sizeQ = ["8b","16b","4h","8h","","4s","",""];
if (U == 0 && opcode == 0x1B) // https://www.scs.stanford.edu/~zyedidia/arm64/addv_advsimd.html
{
p1 = "addv";
p2 = fregString(rbuf[0 .. 4], "bhs "[size], Rd);
uint n = snprintf(buf.ptr, cast(uint)buf.length, "v%d.%s", Rn, sizeQ[size * 2 + Q].ptr);
p3 = buf[0 .. n];
}
else if (U == 1 && opcode == 3) // https://www.scs.stanford.edu/~zyedidia/arm64/uaddlv_advsimd.html
{
p1 = "uaddlv";
p2 = fregString(rbuf[0 .. 4], "hsd "[size], Rd);
immutable string[8] sizeQ = ["8b","16b","4h","8h","","4s","",""];
uint n = snprintf(buf.ptr, cast(uint)buf.length, "v%d.%s", Rn, sizeQ[size * 2 + Q].ptr);
p3 = buf[0 .. n];
}
@ -2759,8 +2768,9 @@ unittest
unittest
{
int line64 = __LINE__;
string[65] cases64 = // 64 bit code gen
string[66] cases64 = // 64 bit code gen
[
"0E 31 BB FF addv b31,v31.8b",
"2E 30 38 00 uaddlv h0,v0.8b",
"0E 20 58 00 cnt v0.8b,v0.8b",
"1E 27 01 00 fmov s0,w8",