diff --git a/py/asmarm.h b/py/asmarm.h
index 561d69a4b..81c3f7b1c 100644
--- a/py/asmarm.h
+++ b/py/asmarm.h
@@ -183,8 +183,6 @@ void asm_arm_bx_reg(asm_arm_t *as, uint reg_src);
 
 #define ASM_MOV_LOCAL_REG(as, local_num, reg_src) asm_arm_mov_local_reg((as), (local_num), (reg_src))
 #define ASM_MOV_REG_IMM(as, reg_dest, imm) asm_arm_mov_reg_i32_optimised((as), (reg_dest), (imm))
-#define ASM_MOV_REG_IMM_FIX_U16(as, reg_dest, imm) asm_arm_mov_reg_i32((as), (reg_dest), (imm))
-#define ASM_MOV_REG_IMM_FIX_WORD(as, reg_dest, imm) asm_arm_mov_reg_i32((as), (reg_dest), (imm))
 #define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_arm_mov_reg_local((as), (reg_dest), (local_num))
 #define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_arm_mov_reg_reg((as), (reg_dest), (reg_src))
 #define ASM_MOV_REG_LOCAL_ADDR(as, reg_dest, local_num) asm_arm_mov_reg_local_addr((as), (reg_dest), (local_num))
diff --git a/py/asmthumb.h b/py/asmthumb.h
index 86b816657..2829ac4c7 100644
--- a/py/asmthumb.h
+++ b/py/asmthumb.h
@@ -401,7 +401,6 @@ void asm_thumb_b_rel12(asm_thumb_t *as, int rel);
 
 #define ASM_MOV_LOCAL_REG(as, local_num, reg) asm_thumb_mov_local_reg((as), (local_num), (reg))
 #define ASM_MOV_REG_IMM(as, reg_dest, imm) asm_thumb_mov_reg_i32_optimised((as), (reg_dest), (imm))
-#define ASM_MOV_REG_IMM_FIX_WORD(as, reg_dest, imm) asm_thumb_mov_reg_i32((as), (reg_dest), (imm))
 #define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_thumb_mov_reg_local((as), (reg_dest), (local_num))
 #define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_thumb_mov_reg_reg((as), (reg_dest), (reg_src))
 #define ASM_MOV_REG_LOCAL_ADDR(as, reg_dest, local_num) asm_thumb_mov_reg_local_addr((as), (reg_dest), (local_num))
diff --git a/py/asmx64.h b/py/asmx64.h
index d132ee193..a8efc2bf6 100644
--- a/py/asmx64.h
+++ b/py/asmx64.h
@@ -186,8 +186,6 @@ void asm_x64_call_ind(asm_x64_t *as, size_t fun_id, int temp_r32);
 
 #define ASM_MOV_LOCAL_REG(as, local_num, reg_src) asm_x64_mov_r64_to_local((as), (reg_src), (local_num))
 #define ASM_MOV_REG_IMM(as, reg_dest, imm) asm_x64_mov_i64_to_r64_optimised((as), (imm), (reg_dest))
-#define ASM_MOV_REG_IMM_FIX_U16(as, reg_dest, imm) asm_x64_mov_i32_to_r64((as), (imm), (reg_dest))
-#define ASM_MOV_REG_IMM_FIX_WORD(as, reg_dest, imm) asm_x64_mov_i32_to_r64((as), (imm), (reg_dest))
 #define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_x64_mov_local_to_r64((as), (local_num), (reg_dest))
 #define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_x64_mov_r64_r64((as), (reg_dest), (reg_src))
 #define ASM_MOV_REG_LOCAL_ADDR(as, reg_dest, local_num) asm_x64_mov_local_addr_to_r64((as), (local_num), (reg_dest))
diff --git a/py/asmx86.h b/py/asmx86.h
index e02e6c954..ac98643a6 100644
--- a/py/asmx86.h
+++ b/py/asmx86.h
@@ -181,8 +181,6 @@ void asm_x86_call_ind(asm_x86_t *as, size_t fun_id, mp_uint_t n_args, int temp_r
 
 #define ASM_MOV_LOCAL_REG(as, local_num, reg_src) asm_x86_mov_r32_to_local((as), (reg_src), (local_num))
 #define ASM_MOV_REG_IMM(as, reg_dest, imm) asm_x86_mov_i32_to_r32((as), (imm), (reg_dest))
-#define ASM_MOV_REG_IMM_FIX_U16(as, reg_dest, imm) asm_x86_mov_i32_to_r32((as), (imm), (reg_dest))
-#define ASM_MOV_REG_IMM_FIX_WORD(as, reg_dest, imm) asm_x86_mov_i32_to_r32((as), (imm), (reg_dest))
 #define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_x86_mov_local_to_r32((as), (local_num), (reg_dest))
 #define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_x86_mov_r32_r32((as), (reg_dest), (reg_src))
 #define ASM_MOV_REG_LOCAL_ADDR(as, reg_dest, local_num) asm_x86_mov_local_addr_to_r32((as), (local_num), (reg_dest))
diff --git a/py/asmxtensa.h b/py/asmxtensa.h
index 5aa86d3b2..5bd6426a1 100644
--- a/py/asmxtensa.h
+++ b/py/asmxtensa.h
@@ -366,8 +366,6 @@ void asm_xtensa_call_ind_win(asm_xtensa_t *as, uint idx);
 
 #define ASM_MOV_LOCAL_REG(as, local_num, reg_src) asm_xtensa_mov_local_reg((as), ASM_NUM_REGS_SAVED + (local_num), (reg_src))
 #define ASM_MOV_REG_IMM(as, reg_dest, imm) asm_xtensa_mov_reg_i32_optimised((as), (reg_dest), (imm))
-#define ASM_MOV_REG_IMM_FIX_U16(as, reg_dest, imm) asm_xtensa_mov_reg_i32((as), (reg_dest), (imm))
-#define ASM_MOV_REG_IMM_FIX_WORD(as, reg_dest, imm) asm_xtensa_mov_reg_i32((as), (reg_dest), (imm))
 #define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_xtensa_mov_reg_local((as), (reg_dest), ASM_NUM_REGS_SAVED + (local_num))
 #define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_xtensa_op_mov_n((as), (reg_dest), (reg_src))
 #define ASM_MOV_REG_LOCAL_ADDR(as, reg_dest, local_num) asm_xtensa_mov_reg_local_addr((as), (reg_dest), ASM_NUM_REGS_SAVED + (local_num))