Merge nanoos

2022-09-06 08:30:16 +02:00
parent 5947cd60cc
commit f3b0eb4a59
16 changed files with 814 additions and 0 deletions
@@ -0,0 +1,43 @@
+.thumb
+.syntax unified
+
+.text
+
+.globl  atomic_inc32
+.type   atomic_inc32, %function
+
+atomic_inc32:
+1:      ldrex           r2, [r0]
+        add             r2, r2, r1
+        strex           r3, r2, [r0]
+        teq             r3, #0
+        bne             1b
+        mov             r0, r2
+        bx              lr
+
+
+.globl  atomic_dec32
+.type   atomic_dec32, %function
+
+atomic_dec32:
+1:      ldrex           r2, [r0]
+        sub             r2, r2, r1
+        strex           r3, r2, [r0]
+        teq             r3, #0
+        bne             1b
+        mov             r0, r2
+        bx              lr
+
+.globl  atomic_dec32le0
+.type   atomic_dec32le0, %function
+
+atomic_dec32le0:
+1:      ldrex           r2, [r0]
+        cmp             r2, #0
+        ble             1b
+        sub             r2, r2, r1
+        strex           r3, r2, [r0]
+        teq             r3, #0
+        bne             1b
+        mov             r0, r2
+        bx              lr