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| author | Damien George <damien.p.george@gmail.com> | 2018-08-16 13:45:24 +1000 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2018-08-16 13:45:24 +1000 |
| commit | 2964b41c282917bfb3f6e3a1d6e3fd7a078abed6 (patch) | |
| tree | 82e8039004d9a19790878c9cff77413d87cf2f81 /py/asmxtensa.h | |
| parent | f7d6108d1ad83f26598e73d3b163f3de411c902b (diff) | |
py/asm*: Support assembling code to jump to a register, and get PC+off.
Useful for position independent code, and implementing state machines.
Diffstat (limited to 'py/asmxtensa.h')
| -rw-r--r-- | py/asmxtensa.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/py/asmxtensa.h b/py/asmxtensa.h index 041844e6d..5198e0199 100644 --- a/py/asmxtensa.h +++ b/py/asmxtensa.h @@ -133,6 +133,10 @@ static inline void asm_xtensa_op_bccz(asm_xtensa_t *as, uint cond, uint reg_src, asm_xtensa_op24(as, ASM_XTENSA_ENCODE_BRI12(6, reg_src, cond, 1, rel12 & 0xfff)); } +static inline void asm_xtensa_op_call0(asm_xtensa_t *as, int32_t rel18) { + asm_xtensa_op24(as, ASM_XTENSA_ENCODE_CALL(5, 0, rel18 & 0x3ffff)); +} + static inline void asm_xtensa_op_callx0(asm_xtensa_t *as, uint reg) { asm_xtensa_op24(as, ASM_XTENSA_ENCODE_CALLX(0, 0, 0, 0, reg, 3, 0)); } @@ -238,6 +242,7 @@ void asm_xtensa_mov_reg_i32(asm_xtensa_t *as, uint reg_dest, uint32_t i32); void asm_xtensa_mov_local_reg(asm_xtensa_t *as, int local_num, uint reg_src); void asm_xtensa_mov_reg_local(asm_xtensa_t *as, uint reg_dest, int local_num); void asm_xtensa_mov_reg_local_addr(asm_xtensa_t *as, uint reg_dest, int local_num); +void asm_xtensa_mov_reg_pcrel(asm_xtensa_t *as, uint reg_dest, uint label); #if GENERIC_ASM_API @@ -274,6 +279,7 @@ void asm_xtensa_mov_reg_local_addr(asm_xtensa_t *as, uint reg_dest, int local_nu asm_xtensa_bccz_reg_label(as, ASM_XTENSA_CCZ_NE, reg, label) #define ASM_JUMP_IF_REG_EQ(as, reg1, reg2, label) \ asm_xtensa_bcc_reg_reg_label(as, ASM_XTENSA_CC_EQ, reg1, reg2, label) +#define ASM_JUMP_REG(as, reg) asm_xtensa_op_jx((as), (reg)) #define ASM_CALL_IND(as, ptr, idx) \ do { \ asm_xtensa_mov_reg_i32(as, ASM_XTENSA_REG_A0, (uint32_t)ptr); \ @@ -286,6 +292,7 @@ void asm_xtensa_mov_reg_local_addr(asm_xtensa_t *as, uint reg_dest, int local_nu #define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_xtensa_mov_reg_local((as), (reg_dest), (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), (local_num)) +#define ASM_MOV_REG_PCREL(as, reg_dest, label) asm_xtensa_mov_reg_pcrel((as), (reg_dest), (label)) #define ASM_LSL_REG_REG(as, reg_dest, reg_shift) \ do { \ |