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feat(asm): complete the EVEX conversions, narrowing and mask-vector moves

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Assisted-by: Qwen 3.8 Max Preview
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petrbalvin
2026-07-20 16:05:08 +02:00
parent 11f962fbcc
commit 1312122a99
6 changed files with 216 additions and 9 deletions
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asm/vex.go
+14 -1
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@@ -130,9 +130,15 @@ var vexTable = map[string]vexSpec{
// no vvvv).
"VPMOVSXWD": {2, 0x23, 0, 1, -1, vexRM},
"VPMOVSXDQ": {2, 0x25, 0, 1, -1, vexRM},
"VPMOVSXBW": {2, 0x20, 0, 1, -1, vexRM},
"VPMOVSXBD": {2, 0x21, 0, 1, -1, vexRM},
"VPMOVSXBQ": {2, 0x22, 0, 1, -1, vexRM},
"VPMOVSXWQ": {2, 0x24, 0, 1, -1, vexRM},
"VPMOVZXDQ": {2, 0x35, 0, 1, -1, vexRM},
"VPMOVZXBW": {2, 0x30, 0, 1, -1, vexRM},
"VPMOVZXBD": {2, 0x31, 0, 1, -1, vexRM},
"VPMOVZXBQ": {2, 0x32, 0, 1, -1, vexRM},
"VPMOVZXWD": {2, 0x33, 0, 1, -1, vexRM},
"VPMOVZXWQ": {2, 0x34, 0, 1, -1, vexRM},
"VPBROADCASTD": {2, 0x58, 0, 1, -1, vexRM},
"VPBROADCASTQ": {2, 0x59, 0, 1, -1, vexRM},
// VEX.128/256.F3.0F.WIG — signed dword to packed double conversion
@@ -198,6 +204,11 @@ var vexTable = map[string]vexSpec{
// VEX.F3.0F.WIG — replicate even/odd singles (reg=dst, rm=src).
"VMOVSLDUP": {1, 0x12, 0, 2, -1, vexRM},
"VMOVSHDUP": {1, 0x16, 0, 2, -1, vexRM},
// VEX.66.0F.WIG — packed double to packed single conversion, the X/Y
// spellings: the destination is always XMM and the spelling fixes the
// source length (X = 128, Y = 256).
"VCVTPD2PSX": {1, 0x5A, 0, 1, -1, vexRMSrcLen},
"VCVTPD2PSY": {1, 0x5A, 0, 1, -1, vexRMSrcLen},
// VEX.128/256.66.0F.WIG — word shifts (opdigit selects the shift).
"VPSRLW": {1, 0x71, 0, 1, 2, vexShiftImm},
@@ -222,6 +233,8 @@ var vexSrcLen = map[string]int{
"VCVTPD2DQY": 1,
"VCVTTPD2DQX": 0,
"VCVTTPD2DQY": 1,
"VCVTPD2PSX": 0,
"VCVTPD2PSY": 1,
}
// vexVarShift maps the shift mnemonics to their variable-count opcode — the