From: Bernhard Urban <lewurm@gmail.com>
Date: Tue, 11 Jan 2011 17:11:32 +0000 (+0100)
Subject: fibmmem_real.s: fibmmem mit uart ausgaben
X-Git-Url: http://wien.tomnetworks.com/gitweb/?p=calu.git;a=commitdiff_plain;h=4690b2c532b72d5dd2e418ab75e6133144f65cc6

fibmmem_real.s: fibmmem mit uart ausgaben
---

diff --git a/3_test/fibmmem_real.s b/3_test/fibmmem_real.s
new file mode 100644
index 0000000..9e9f31b
--- /dev/null
+++ b/3_test/fibmmem_real.s
@@ -0,0 +1,174 @@
+.data
+.org 0x10
+list:
+	.fill 0x1 ;1. element = 1 ;0x10
+	.fill 0x1 ;2. element = 1 ;0x14
+	.fill 0x10, 0x0 ;nullen..
+int2hex:
+	;3210
+	.fill 0x33323130 
+	;7654
+	.fill 0x37363534
+	;ba98
+	.fill 0x62613938
+	;fedc
+	.fill 0x66656463
+.text
+	.define UART_BASE, 0x2000
+	.define UART_STATUS, 0x0
+	.define UART_RECV, 0xc
+	.define UART_TRANS, 0x8
+
+	.define UART_TRANS_EMPTY, 0x1
+	.define UART_RECV_NEW, 0x2
+start:
+	br+ main
+	br+ main
+	ret
+main:
+	call+ uart_init
+	call+ recv_byte
+
+	ldi r1, 9;
+	ldi r10, list@lo ; global pointer
+	ldih r10, list@hi
+	call+ fibcall;
+
+	push r0
+	addi r12, r0, 0
+	call+ uart_init
+	addi r1, r12, 0
+	call debug_uint
+
+	; stack tests:
+	; newline
+	xor r1, r1, r1
+	ldi r1, 0x0a
+	call send_byte
+	ldi r1, 0x0d
+	call send_byte
+
+	; wert vom stack zurueckgeben
+	xor r1, r1, r1
+	pop r1
+	call debug_uint
+
+	; newline
+	xor r1, r1, r1
+	ldi r1, 0x0a
+	call send_byte
+	ldi r1, 0x0d
+	call send_byte
+
+	xor r1, r1, r1
+	ldi r1, 0x41
+	push r1
+	ldi r1, 0x42
+	push r1
+	ldi r1, 0x43
+	push r1
+	ldi r1, 0x44
+	push r1
+	ldi r1, 0x45
+	push r1
+
+	pop r1
+	call send_byte
+	pop r1
+	call send_byte
+	pop r1
+	call send_byte
+	pop r1
+	call send_byte
+	pop r1
+	call send_byte
+
+hang:
+	br hang
+
+	; fib(n) {
+	;   if (list[n] > 0) {
+	;   	return list[n]
+	;   }
+	;   a = fib(n-1)
+	;   list[n] = a + list[n-2]
+	;   return list[n]
+	; }
+fibcall:
+	;update counter for aligned access
+	lls r1, r1, 2 ; *4
+	;calculate adress of top element
+	add r2, r10, r1
+fibmem:
+	;load top element
+	ldw r0, 0(r2)
+	;compare if set
+	cmpi r0, 0
+	;return if set
+	retnz-
+	;decrement adress for next lopp
+	subi r2, r2, 4
+	;iterative call for n-1 element
+	call+ fibmem
+	;load n-2 element
+	ldw r3, 0-4(r2)
+	;add n-1 and n-2 element
+	add r0, r3, r0
+	;increment address for n element
+	;is needed because after return
+	;we need r2 to be set to the address
+	;of element n
+	addi r2, r2, 4
+	;store fib n
+	stw r0, 0(r2)
+	ret+
+
+recv_byte:
+	ldw r3, UART_STATUS(r10)
+	andx r3, UART_RECV_NEW
+	brzs+ recv_byte; branch if zero
+	xor r0, r0, r0
+	ldw r0, UART_RECV(r10)
+	ret
+
+send_byte:
+	ldw r9, UART_STATUS(r10)
+	andx r9, UART_TRANS_EMPTY
+	brnz+ send_byte ; branch if not zero
+	stb r1, UART_TRANS(r10)
+	ret
+
+debug_uint:
+	addi r8, r1, 0
+	;usb_sendbuffersafe ("0x", 2);
+	xor r1, r1, r1
+	ldi r1, 0x30
+	call send_byte
+	xor r1, r1, r1
+	ldi r1, 0x78
+	call send_byte
+	;j = 0
+	xor r7, r7, r7
+	xor r6, r6, r6
+	ldi r6, int2hex@lo
+	ldih r6, int2hex@hi
+debug_unit_loop:
+	;for (j = 0; j < 8; ++j) {
+	cmpi r7, 8
+	reteq
+	;usb_sendbuffersafe (&int2hex[(i >> 28) & 0xf], 1);
+	lrs r1, r8, 28
+	andx r1, 0xf
+	add r9, r6, r1
+	ldb r1, 0(r9)
+	call send_byte
+	;i <<= 4;
+	lls r8, r8, 4
+	addi r7, r7, 1
+	br debug_unit_loop
+
+uart_init:
+	xor r10, r10, r10
+	ldi r10, UART_BASE@lo
+	ldih r10, UART_BASE@hi
+	ret