py/asmarm: Add asm_arm_ldrh_reg_reg_offset() helper func.

Signed-off-by: Damien George <damien@micropython.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/py/asmarm.c b/py/asmarm.c
index 4ba93d080..42724e4d4 100644
--- a/py/asmarm.c
+++ b/py/asmarm.c
@@ -304,6 +304,11 @@ void asm_arm_ldrh_reg_reg(asm_arm_t *as, uint rd, uint rn) {
     emit_al(as, 0x1d000b0 | (rn << 16) | (rd << 12));
 }
 
+void asm_arm_ldrh_reg_reg_offset(asm_arm_t *as, uint rd, uint rn, uint byte_offset) {
+    // ldrh rd, [rn, #off]
+    emit_al(as, 0x1f000b0 | (rn << 16) | (rd << 12) | ((byte_offset & 0xf0) << 4) | (byte_offset & 0xf));
+}
+
 void asm_arm_ldrb_reg_reg(asm_arm_t *as, uint rd, uint rn) {
     // ldrb rd, [rn]
     emit_al(as, 0x5d00000 | (rn << 16) | (rd << 12));