py/asmarm: Add asm_arm_ldrh_reg_reg_offset() helper func.

Signed-off-by: Damien George <[email protected]>

Author: dpgeorge

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));

py/asmarm.h

@@ -109,6 +109,7 @@ void asm_arm_asr_reg_reg(asm_arm_t *as, uint rd, uint rs);
 // memory
 void asm_arm_ldr_reg_reg(asm_arm_t *as, uint rd, uint rn, uint byte_offset);
 void asm_arm_ldrh_reg_reg(asm_arm_t *as, uint rd, uint rn);
+void asm_arm_ldrh_reg_reg_offset(asm_arm_t *as, uint rd, uint rn, uint byte_offset);
 void asm_arm_ldrb_reg_reg(asm_arm_t *as, uint rd, uint rn);
 void asm_arm_str_reg_reg(asm_arm_t *as, uint rd, uint rm, uint byte_offset);
 void asm_arm_strh_reg_reg(asm_arm_t *as, uint rd, uint rm);