mmcloughlin · mmcloughlin · Jan 20, 2024 · egonelbre · Jan 20, 2024 · mmcloughlin
diff --git a/build/zinstructions.go b/build/zinstructions.go
diff --git a/build/zinstructions_test.go b/build/zinstructions_test.go
diff --git a/internal/inst/ztable.go b/internal/inst/ztable.go
diff --git a/internal/opcodesextra/instructions.go b/internal/opcodesextra/instructions.go
@@ -9,6 +9,7 @@ import (
 
 // sets of extra instructions.
 var sets = [][]*inst.Instruction{
+	pseudo,
 	movlqzx,
 	gfni,
 	vaes,

diff --git a/internal/opcodesextra/pseudo.go b/internal/opcodesextra/pseudo.go
@@ -0,0 +1,35 @@
+package opcodesextra
+
+import "github.com/mmcloughlin/avo/internal/inst"
+
+// pseudo is pseudo-ops supported by the Go assembler.
+var pseudo = []*inst.Instruction{
+	// Reference: https://github.com/golang/go/blob/go1.22rc1/doc/asm.html#L469-L482
+	//
+	//	<p>
+	//	The <code>PCALIGN</code> pseudo-instruction is used to indicate that the next instruction should be aligned
+	//	to a specified boundary by padding with no-op instructions.
+	//	</p>
+	//
+	//	<p>
+	//	It is currently supported on arm64, amd64, ppc64, loong64 and riscv64.
+	//
+	//	For example, the start of the <code>MOVD</code> instruction below is aligned to 32 bytes:
+	//	<pre>
+	//	PCALIGN $32
+	//	MOVD $2, R0
+	//	</pre>
+	//	</p>
+	//
+	{
+		Opcode:  "PCALIGN",
+		Summary: "Align the next instruction to the specified boundary",
+		Forms: []inst.Form{
+			{
+				Operands: []inst.Operand{
+					{Type: "imm8"},
+				},
+			},
+		},
+	},
+}
diff --git a/x86/zctors.go b/x86/zctors.go
diff --git a/x86/zctors_test.go b/x86/zctors_test.go