Initial drop

Add some riscv code

Signed-off-by: Carlos Maiolino <[email protected]>

1 files changed, 39 insertions, 0 deletions

diff --git a/riscv/array_search.s b/riscv/array_search.s
new file mode 100644
index 0000000..bae9800
--- /dev/null
+++ b/riscv/array_search.s
@@ -0,0 +1,39 @@
+.section .data
+arr: .word 3, 5, 9, 33, 10, 59, 22, 95, 23, 24
+
+.section .text
+.globl _start
+
+
+#
+# a5 - Holds the current array index address
+# a1 - The loop counter
+# t4 - total elements in the array
+# t1 - the index - actually used to calculate the next
+#      item, always the array member size, can be a loop invariant
+# t2 - holds the new index address, I'm pretty sure this can use a5 again
+get_largest_number:
+	la	a5, arr
+	lw	a0, (a5)
+
+	li	a1, 1
+	li	t4, 10
+	slli	t1, a1, 2
+
+for:
+	bge	a1, t4, for_exit
+	add	a5, a5, t1
+	lw	t3, (a5)
+	blt	t3, a0, skip
+	mv	a0, t3
+skip:
+	addi	a1, a1, 1
+	j	for
+
+for_exit:
+	ret
+
+_start:
+	call	get_largest_number
+	li	a7, 93
+	ecall