(WIP) Add a native PowerPC testing frontend

src/xenia/cpu/ppc/testing/ppc_testing_native_thunks.s

@@ -0,0 +1,195 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2017 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+ // r3 = context
+ // this does not touch r1, r3, r4, r13
+.load_registers_ctx:
+  ld r0,  0x00(r3)
+  // r1 cannot be used
+  ld r2,  0x10(r3)
+  // r3 will be loaded before the call
+  // r4 will be loaded before the call
+  ld r5,  0x28(r3)
+  ld r6,  0x30(r3)
+  ld r7,  0x38(r3)
+  ld r8,  0x40(r3)
+  ld r9,  0x48(r3)
+  ld r10, 0x50(r3)
+  ld r11, 0x58(r3)
+  ld r12, 0x60(r3)
+  // r13 cannot be used (OS use only)
+  ld r14, 0x70(r3)
+  ld r15, 0x78(r3)
+  ld r16, 0x80(r3)
+  ld r17, 0x88(r3)
+  ld r18, 0x90(r3)
+  ld r19, 0x98(r3)
+  ld r20, 0xA0(r3)
+  ld r21, 0xA8(r3)
+  ld r22, 0xB0(r3)
+  ld r23, 0xB8(r3)
+  ld r24, 0xC0(r3)
+  ld r25, 0xC8(r3)
+  ld r26, 0xD0(r3)
+  ld r27, 0xD8(r3)
+  ld r28, 0xE0(r3)
+  ld r29, 0xE8(r3)
+  ld r30, 0xF0(r3)
+  ld r31, 0xF8(r3)
+  blr
+
+// r3 = context
+// this does not save r1, r3, r13
+.save_registers_ctx:
+  std r0,  0x00(r3)
+  // r1 cannot be used
+  std r2,  0x10(r3)
+  // r3 will be saved later
+  std r4,  0x20(r3)
+  std r5,  0x28(r3)
+  std r6,  0x30(r3)
+  std r7,  0x38(r3)
+  std r8,  0x40(r3)
+  std r9,  0x48(r3)
+  std r10, 0x50(r3)
+  std r11, 0x58(r3)
+  std r12, 0x60(r3)
+  // r13 cannot be used (OS use only)
+  std r14, 0x70(r3)
+  std r15, 0x78(r3)
+  std r16, 0x80(r3)
+  std r17, 0x88(r3)
+  std r18, 0x90(r3)
+  std r19, 0x98(r3)
+  std r20, 0xA0(r3)
+  std r21, 0xA8(r3)
+  std r22, 0xB0(r3)
+  std r23, 0xB8(r3)
+  std r24, 0xC0(r3)
+  std r25, 0xC8(r3)
+  std r26, 0xD0(r3)
+  std r27, 0xD8(r3)
+  std r28, 0xE0(r3)
+  std r29, 0xE8(r3)
+  std r30, 0xF0(r3)
+  std r31, 0xF8(r3)
+  blr
+
+// void xe_call_native(Context* ctx, void* func)
+.globl xe_call_native
+xe_call_native:
+  mflr r12
+  stw  r12, -0x8(r1)
+  stwu r1, -0x380(r1) // 0x200(gpr + fp) + 0x200(vr)
+
+  // Save nonvolatile registers on the stack.
+  std r2, 0x110(r1)
+  std r3, 0x118(r1)  // Store the context, this will be needed later.
+  std r14, 0x170(r1)
+  std r15, 0x178(r1)
+  std r16, 0x180(r1)
+  std r17, 0x188(r1)
+  std r18, 0x190(r1)
+  std r19, 0x198(r1)
+  std r20, 0x1A0(r1)
+  std r21, 0x1A8(r1)
+  std r22, 0x1B0(r1)
+  std r23, 0x1B8(r1)
+  std r24, 0x1C0(r1)
+  std r25, 0x1C8(r1)
+  std r26, 0x1D0(r1)
+  std r27, 0x1D8(r1)
+  std r28, 0x1E0(r1)
+  std r29, 0x1E8(r1)
+  std r30, 0x1F0(r1)
+  std r31, 0x1F8(r1)
+
+  stfd f14, 0x270(r1)
+  stfd f15, 0x278(r1)
+  stfd f16, 0x280(r1)
+  stfd f17, 0x288(r1)
+  stfd f18, 0x290(r1)
+  stfd f19, 0x298(r1)
+  stfd f20, 0x2A0(r1)
+  stfd f21, 0x2A8(r1)
+  stfd f22, 0x2B0(r1)
+  stfd f23, 0x2B8(r1)
+  stfd f24, 0x2C0(r1)
+  stfd f25, 0x2C8(r1)
+  stfd f26, 0x2D0(r1)
+  stfd f27, 0x2D8(r1)
+  stfd f28, 0x2E0(r1)
+  stfd f29, 0x2E8(r1)
+  stfd f30, 0x2F0(r1)
+  stfd f31, 0x2F8(r1)
+
+  // Load registers from context
+  bl load_registers_ctx
+
+  // Call the test routine
+  mtctr r4
+  ld r4, 0x28(r3)
+  ld r3, 0x20(r3)
+  bctrl
+
+  // Temporarily store r3 into the stack (in the place of r0)
+  std r3, 0x100(r1)
+
+  // Store registers into context
+  ld r3, 0x118(r1)
+  bl save_registers_ctx
+
+  // Now store r3
+  ld r4, 0x100(r1)
+  std r4, 0x20(r3)
+
+  // Restore nonvolatile registers from the stack
+  ld r2, 0x110(r1)
+  ld r14, 0x170(r1)
+  ld r15, 0x178(r1)
+  ld r16, 0x180(r1)
+  ld r17, 0x188(r1)
+  ld r18, 0x190(r1)
+  ld r19, 0x198(r1)
+  ld r20, 0x1A0(r1)
+  ld r21, 0x1A8(r1)
+  ld r22, 0x1B0(r1)
+  ld r23, 0x1B8(r1)
+  ld r24, 0x1C0(r1)
+  ld r25, 0x1C8(r1)
+  ld r26, 0x1D0(r1)
+  ld r27, 0x1D8(r1)
+  ld r28, 0x1E0(r1)
+  ld r29, 0x1E8(r1)
+  ld r30, 0x1F0(r1)
+  ld r31, 0x1F8(r1)
+
+  lfd f14, 0x270(r1)
+  lfd f15, 0x278(r1)
+  lfd f16, 0x280(r1)
+  lfd f17, 0x288(r1)
+  lfd f18, 0x290(r1)
+  lfd f19, 0x298(r1)
+  lfd f20, 0x2A0(r1)
+  lfd f21, 0x2A8(r1)
+  lfd f22, 0x2B0(r1)
+  lfd f23, 0x2B8(r1)
+  lfd f24, 0x2C0(r1)
+  lfd f25, 0x2C8(r1)
+  lfd f26, 0x2D0(r1)
+  lfd f27, 0x2D8(r1)
+  lfd f28, 0x2E0(r1)
+  lfd f29, 0x2E8(r1)
+  lfd f30, 0x2F0(r1)
+  lfd f31, 0x2F8(r1)
+
+  addi r1, r1, 0x380
+  lwz  r12, -0x8(r1)
+  mtlr r12
+  blr