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 +1,120 @@
+// 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"
+
+// PPC64LE ELFv2 ABI:
+// - Integer args: R3-R10 (8 registers)
+// - Float args: F1-F8 (8 registers)
+// - Return: R3 (integer), F1 (float)
+// - Stack pointer: R1
+// - Link register: LR (special)
+// - TOC pointer: R2 (must preserve)
+
+// Stack layout for ELFv2 ABI (aligned to 16 bytes):
+// From callee's perspective when we call BL (CTR):
+//  0(R1)  - back chain (our old R1)
+//  8(R1)  - CR save word (optional)
+// 16(R1)  - LR save (optional, we save it)
+// 24(R1)  - Reserved (compilers)
+// 32(R1)  - Parameter save area start (8 * 8 = 64 bytes for R3-R10)
+// 96(R1)  - First stack arg (a9) - this is where callee looks
+// 104(R1) - Second stack arg (a10)
+// 112-152 - Stack args a11-a15 (5 * 8 = 40 bytes)
+// 160(R1) - TOC save (we put it here, outside param save area)
+// 168(R1) - saved args pointer
+// 176(R1) - padding for 16-byte alignment
+// Total: 176 bytes
+
+#define STACK_SIZE 176
+#define LR_SAVE    16
+#define TOC_SAVE   160
+#define ARGP_SAVE  168
+
+GLOBL ·syscall15XABI0(SB), NOPTR|RODATA, $8
+DATA ·syscall15XABI0(SB)/8, $syscall15X(SB)
+
+TEXT syscall15X(SB), NOSPLIT, $0
+	// Prologue: create stack frame
+	// R3 contains the args pointer on entry
+	MOVD R1, R12          // save old SP
+	SUB  $STACK_SIZE, R1  // allocate stack frame
+	MOVD R12, 0(R1)       // save back chain
+	MOVD LR, R12
+	MOVD R12, LR_SAVE(R1) // save LR
+	MOVD R2, TOC_SAVE(R1) // save TOC
+
+	// Save args pointer (in R3)
+	MOVD R3, ARGP_SAVE(R1)
+
+	// R11 := args pointer (syscall15Args*)
+	MOVD R3, R11
+
+	// Load float args into F1-F8
+	FMOVD syscall15Args_f1(R11), F1
+	FMOVD syscall15Args_f2(R11), F2
+	FMOVD syscall15Args_f3(R11), F3
+	FMOVD syscall15Args_f4(R11), F4
+	FMOVD syscall15Args_f5(R11), F5
+	FMOVD syscall15Args_f6(R11), F6
+	FMOVD syscall15Args_f7(R11), F7
+	FMOVD syscall15Args_f8(R11), F8
+
+	// Load integer args into R3-R10
+	MOVD syscall15Args_a1(R11), R3
+	MOVD syscall15Args_a2(R11), R4
+	MOVD syscall15Args_a3(R11), R5
+	MOVD syscall15Args_a4(R11), R6
+	MOVD syscall15Args_a5(R11), R7
+	MOVD syscall15Args_a6(R11), R8
+	MOVD syscall15Args_a7(R11), R9
+	MOVD syscall15Args_a8(R11), R10
+
+	// Spill a9-a15 onto the stack (stack parameters start at 96(R1))
+	// Per ELFv2: parameter save area is 32-95, stack args start at 96
+	MOVD ARGP_SAVE(R1), R11          // reload args pointer
+	MOVD syscall15Args_a9(R11), R12
+	MOVD R12, 96(R1)                 // a9 at 96(R1)
+	MOVD syscall15Args_a10(R11), R12
+	MOVD R12, 104(R1)                // a10 at 104(R1)
+	MOVD syscall15Args_a11(R11), R12
+	MOVD R12, 112(R1)                // a11 at 112(R1)
+	MOVD syscall15Args_a12(R11), R12
+	MOVD R12, 120(R1)                // a12 at 120(R1)
+	MOVD syscall15Args_a13(R11), R12
+	MOVD R12, 128(R1)                // a13 at 128(R1)
+	MOVD syscall15Args_a14(R11), R12
+	MOVD R12, 136(R1)                // a14 at 136(R1)
+	MOVD syscall15Args_a15(R11), R12
+	MOVD R12, 144(R1)                // a15 at 144(R1)
+
+	// Call function: load fn and call
+	MOVD syscall15Args_fn(R11), R12
+	MOVD R12, CTR
+	BL   (CTR)
+
+	// Restore TOC after call
+	MOVD TOC_SAVE(R1), R2
+
+	// Restore args pointer for storing results
+	MOVD ARGP_SAVE(R1), R11
+
+	// Store integer results back (R3, R4)
+	MOVD R3, syscall15Args_a1(R11)
+	MOVD R4, syscall15Args_a2(R11)
+
+	// Store float return values (F1-F4)
+	FMOVD F1, syscall15Args_f1(R11)
+	FMOVD F2, syscall15Args_f2(R11)
+	FMOVD F3, syscall15Args_f3(R11)
+	FMOVD F4, syscall15Args_f4(R11)
+
+	// Epilogue: restore and return
+	MOVD LR_SAVE(R1), R12
+	MOVD R12, LR
+	ADD  $STACK_SIZE, R1
+	RET