vendor raymenu dependencies

2026-05-10 01:49:00 +02:00
parent a2f05963bb
commit 35c229182b
346 changed files with 391647 additions and 1 deletions
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2026 The Ebitengine Authors
+
+//go:build linux
+
+#include "textflag.h"
+#include "go_asm.h"
+#include "funcdata.h"
+
+TEXT callbackasm1(SB), NOFRAME, $0
+	NO_LOCAL_POINTERS
+
+	// On entry, the trampoline in zcallback_riscv64.s left
+	// the callback index in X7.
+
+	// Save callback register arguments X10-X17 and F10-F17.
+	// Stack args (if any) are at 0(SP), 8(SP), etc.
+	// We save register args at SP-128, making them contiguous with stack args.
+	ADD $-(16*8), SP, X6
+
+	// Save float arg regs fa0-fa7 (F10-F17)
+	MOVD F10, 0(X6)
+	MOVD F11, 8(X6)
+	MOVD F12, 16(X6)
+	MOVD F13, 24(X6)
+	MOVD F14, 32(X6)
+	MOVD F15, 40(X6)
+	MOVD F16, 48(X6)
+	MOVD F17, 56(X6)
+
+	// Save integer arg regs a0-a7 (X10-X17)
+	MOV X10, 64(X6)
+	MOV X11, 72(X6)
+	MOV X12, 80(X6)
+	MOV X13, 88(X6)
+	MOV X14, 96(X6)
+	MOV X15, 104(X6)
+	MOV X16, 112(X6)
+	MOV X17, 120(X6)
+
+	// Allocate space on stack for RA, saved regs, and callbackArgs.
+	// We need: 8 (RA) + 8 (X9 callee-saved) + 24 (callbackArgs) = 40, round to 176 (22*8)
+	// to match loong64 and ensure we don't overlap with saved register args.
+	// The saved regs end at SP-8 (original), so we need new SP below SP-128.
+	ADD $-(22*8), SP
+
+	// Save link register (RA/X1) and callee-saved register X9
+	// (X9 is used by the assembler for some instructions)
+	MOV X1, 0(SP)
+	MOV X9, 8(SP)
+
+	// Create a struct callbackArgs on our stack.
+	// callbackArgs struct: index(0), args(8), result(16)
+	// Place it at 16(SP) to avoid overlap
+	ADD $16, SP, X9
+	MOV X7, 0(X9)   // callback index
+	MOV X6, 8(X9)   // address of args vector
+	MOV X0, 16(X9)  // result = 0
+
+	// Call crosscall2 with arguments in registers
+	MOV ·callbackWrap_call(SB), X10 // Get the ABIInternal function pointer
+	MOV (X10), X10                  // without <ABIInternal> by using a closure.  X10 = fn
+	MOV X9, X11                     // X11 = frame (address of callbackArgs)
+	MOV X0, X13                     // X13 = ctxt = 0
+
+	CALL crosscall2(SB)
+
+	// Get callback result.
+	ADD $16, SP, X9
+	MOV 16(X9), X10
+
+	// Restore link register and callee-saved X9
+	MOV 8(SP), X9
+	MOV 0(SP), X1
+
+	// Restore stack pointer
+	ADD $(22*8), SP
+
+	RET