pcsxr-1.9.92

1 files changed, 124 insertions, 0 deletions

diff --git a/libpcsxcore/ppc/pasm.s b/libpcsxcore/ppc/pasm.s
new file mode 100644
index 0000000..96891b4
--- /dev/null
+++ b/libpcsxcore/ppc/pasm.s
@@ -0,0 +1,124 @@
+
+
+#define OLD_REGISTER_OFFSET	(19*4)
+#define SP_SIZE			(OLD_REGISTER_OFFSET+4+8)
+
+/*asm void recRun(register void (*func)(), register u32 hw1, register u32 hw2)*/
+        .text
+        .align  4
+        .globl  recRun
+recRun:
+	/* prologue code */
+	mflr	r0
+	stmw	r13, -(32-13)*4(r1)
+	stw		r0, 4(r1)
+	stwu	r1, -((32-13)*4+8)(r1)
+	
+	/* execute code */
+	mtctr	r3
+	mr	r31, r4
+	mr	r30, r5
+	bctrl
+/*
+}
+asm void returnPC()
+{*/
+        .text
+        .align  4
+        .globl  returnPC
+returnPC:
+	// end code
+	lwz		r0, (32-13)*4+8+4(r1)
+	addi	r1, r1, (32-13)*4+8
+	mtlr	r0
+	lmw		r13, -(32-13)*4(r1)
+	blr
+//}*/
+
+// Memory functions that only works with a linear memory
+
+        .text
+        .align  4
+        .globl  dynMemRead8
+dynMemRead8:
+// assumes that memory pointer is in r30
+	addis    r2,r3,-0x1f80
+	srwi.     r4,r2,16
+	bne+     .norm8
+	cmplwi   r2,0x1000
+	blt-     .norm8
+	b        psxHwRead8
+.norm8:
+	clrlwi   r5,r3,3
+	lbzx     r3,r5,r30
+	blr
+
+        .text
+        .align  4
+        .globl  dynMemRead16
+dynMemRead16:
+// assumes that memory pointer is in r30
+	addis    r2,r3,-0x1f80
+	srwi.     r4,r2,16
+	bne+     .norm16
+	cmplwi   r2,0x1000
+	blt-     .norm16
+	b        psxHwRead16
+.norm16:
+	clrlwi   r5,r3,3
+	lhbrx    r3,r5,r30
+	blr
+
+        .text
+        .align  4
+        .globl  dynMemRead32
+dynMemRead32:
+// assumes that memory pointer is in r30
+	addis    r2,r3,-0x1f80
+	srwi.     r4,r2,16
+	bne+     .norm32
+	cmplwi   r2,0x1000
+	blt-     .norm32
+	b        psxHwRead32
+.norm32:
+	clrlwi   r5,r3,3
+	lwbrx    r3,r5,r30
+	blr
+
+/*
+	N P Z
+	0 0 0 X
+-	0 0 1 X
+	1 0 0 X
+	1 0 1 X
+
+P | (!N & Z)
+P | !(N | !Z)
+*/
+
+        .text
+        .align  4
+        .globl  dynMemWrite32
+dynMemWrite32:
+// assumes that memory pointer is in r30
+	addis    r2,r3,-0x1f80
+	srwi.    r5,r2,16
+	bne+     .normw32
+	cmplwi   r2,0x1000
+	blt      .normw32
+	b        psxHwWrite32
+.normw32:
+	mtcrf    0xFF, r3
+	clrlwi   r5,r3,3
+	crandc   0, 2, 0
+	cror     2, 1, 0
+	bne+     .okw32
+	// write test
+	li			r2,0x0130
+	addis    r2,r2,0xfffe
+	cmplw    r3,r2
+	bnelr
+.okw32:
+	stwbrx   r4,r5,r30
+	blr
+