feat: gasm-devkit 0.1.0 — GAsm lexer, parser, linter, formatter, LSP and amd64 assembler

Assisted-by: Qwen 3.8 Max Preview

testdata/sample_amd64.s

@@ -0,0 +1,56 @@
+// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include "textflag.h"
+
+// Index vector for the order-2 ramp.
+GLOBL ·idx16(SB), RODATA, $64
+DATA ·idx16+0(SB)/4, $1
+DATA ·idx16+4(SB)/4, $2
+
+// A file-local (static) constant table.
+GLOBL mask24<>(SB), RODATA, $16
+DATA mask24<>+0(SB)/4, $0x80020100
+DATA mask24<>+4(SB)/4, $0x80050403
+
+// func analyzeO1RangeAVX2(swin []int32, dstP []uint32, hist *[32]uint16) (partSum uint64, overflow bool)
+TEXT ·analyzeO1RangeAVX2(SB), NOSPLIT, $0-65
+	MOVQ swin_base+0(FP), SI
+	MOVQ dstP_base+24(FP), DI
+	MOVQ dstP_len+32(FP), BX
+	MOVQ hist+48(FP), R13
+
+	VPCMPEQD Y0, Y0, Y0
+	VPSLLD   $31, Y0, Y0
+
+	LEAQ (SI)(BX*4), R9
+	MOVQ BX, R10
+	ANDQ $-8, R10
+
+vec1:
+	CMPQ    SI, R10
+	JGE     vec1done
+	VMOVDQU (SI), Y1
+	VMOVDQU 4(SI), Y2
+	VPSUBD  Y1, Y2, Y3
+	ADDQ    $32, SI
+	JMP     vec1
+vec1done:
+
+	MOVQ AX, partSum+56(FP)
+	MOVB AL, overflow+64(FP)
+	VZEROUPPER
+	RET
+
+// func decodeFixedO1AVX512(samples []int32, residual []int32)
+TEXT ·decodeFixedO1AVX512(SB), NOSPLIT, $0-48
+	MOVQ samples_base+0(FP), SI
+	VPBROADCASTD AX, Z15
+	VMOVDQU32 (DI)(AX*1), Z0
+	VALIGND   $15, Z9, Z0, Z1
+	VFMADD231PD Z14, Z12, Z10
+	VPCMPEQD  Z0, Z3, K1
+	KTESTW    K1, K1
+	VPSRAQ    X31, Z8, Z8
+	VMOVDQU32 Z0, 4(SI)(AX*1)
+	RET