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 +1,114 @@
+// 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"
+
+// S390X ELF ABI:
+// - Integer args: R2-R6 (5 registers)
+// - Float args: F0, F2, F4, F6 (4 registers, even-numbered)
+// - Return: R2 (integer), F0 (float)
+// - Stack pointer: R15
+// - Link register: R14
+// - Callee-saved: R6-R13, F8-F15 (but R6 is also used for 5th param)
+//
+// Stack frame layout (aligned to 8 bytes):
+//   0(R15)   - back chain
+//   8(R15)   - reserved
+//  16(R15)   - reserved
+//  ...       - register save area (R6-R15 at 48(R15))
+// 160(R15)  - parameter area start (args beyond registers)
+//
+// We need space for:
+// - 160 bytes standard frame (with register save area)
+// - Stack args a6-a15 (10 * 8 = 80 bytes)
+// - Saved args pointer (8 bytes)
+// - Padding for alignment
+// Total: 264 bytes (rounded to 8-byte alignment)
+
+#define STACK_SIZE 264
+#define STACK_ARGS 160
+#define ARGP_SAVE  248
+
+GLOBL ·syscall15XABI0(SB), NOPTR|RODATA, $8
+DATA ·syscall15XABI0(SB)/8, $syscall15X(SB)
+
+TEXT syscall15X(SB), NOSPLIT, $0
+	// On entry, R2 contains the args pointer
+	// Save callee-saved registers in caller's frame (per ABI)
+	STMG R6, R15, 48(R15)
+
+	// Allocate our stack frame
+	MOVD R15, R1
+	SUB  $STACK_SIZE, R15
+	MOVD R1, 0(R15)       // back chain
+
+	// Save args pointer
+	MOVD R2, ARGP_SAVE(R15)
+
+	// R9 := args pointer (syscall15Args*)
+	MOVD R2, R9
+
+	// Load float args into F0, F2, F4, F6 (s390x uses even-numbered FPRs)
+	FMOVD syscall15Args_f1(R9), F0
+	FMOVD syscall15Args_f2(R9), F2
+	FMOVD syscall15Args_f3(R9), F4
+	FMOVD syscall15Args_f4(R9), F6
+
+	// Load integer args into R2-R6 (5 registers)
+	MOVD syscall15Args_a1(R9), R2
+	MOVD syscall15Args_a2(R9), R3
+	MOVD syscall15Args_a3(R9), R4
+	MOVD syscall15Args_a4(R9), R5
+	MOVD syscall15Args_a5(R9), R6
+
+	// Spill remaining args (a6-a15) onto the stack at 160(R15)
+	MOVD ARGP_SAVE(R15), R9        // reload args pointer
+	MOVD syscall15Args_a6(R9), R1
+	MOVD R1, (STACK_ARGS+0*8)(R15)
+	MOVD syscall15Args_a7(R9), R1
+	MOVD R1, (STACK_ARGS+1*8)(R15)
+	MOVD syscall15Args_a8(R9), R1
+	MOVD R1, (STACK_ARGS+2*8)(R15)
+	MOVD syscall15Args_a9(R9), R1
+	MOVD R1, (STACK_ARGS+3*8)(R15)
+	MOVD syscall15Args_a10(R9), R1
+	MOVD R1, (STACK_ARGS+4*8)(R15)
+	MOVD syscall15Args_a11(R9), R1
+	MOVD R1, (STACK_ARGS+5*8)(R15)
+	MOVD syscall15Args_a12(R9), R1
+	MOVD R1, (STACK_ARGS+6*8)(R15)
+	MOVD syscall15Args_a13(R9), R1
+	MOVD R1, (STACK_ARGS+7*8)(R15)
+	MOVD syscall15Args_a14(R9), R1
+	MOVD R1, (STACK_ARGS+8*8)(R15)
+	MOVD syscall15Args_a15(R9), R1
+	MOVD R1, (STACK_ARGS+9*8)(R15)
+
+	// Call function
+	MOVD syscall15Args_fn(R9), R1
+	BL   (R1)
+
+	// Restore args pointer for storing results
+	MOVD ARGP_SAVE(R15), R9
+
+	// Store integer results back (R2, R3)
+	MOVD R2, syscall15Args_a1(R9)
+	MOVD R3, syscall15Args_a2(R9)
+
+	// Store float return values (F0, F2, F4, F6)
+	FMOVD F0, syscall15Args_f1(R9)
+	FMOVD F2, syscall15Args_f2(R9)
+	FMOVD F4, syscall15Args_f3(R9)
+	FMOVD F6, syscall15Args_f4(R9)
+
+	// Deallocate stack frame
+	ADD $STACK_SIZE, R15
+
+	// Restore callee-saved registers from caller's save area
+	LMG 48(R15), R6, R15
+
+	RET