diff options
Diffstat (limited to 'py/asmrv32.c')
| -rw-r--r-- | py/asmrv32.c | 73 |
1 files changed, 33 insertions, 40 deletions
diff --git a/py/asmrv32.c b/py/asmrv32.c index c24d05a138..158b552191 100644 --- a/py/asmrv32.c +++ b/py/asmrv32.c @@ -450,18 +450,24 @@ void asm_rv32_emit_mov_reg_local_addr(asm_rv32_t *state, mp_uint_t rd, mp_uint_t asm_rv32_opcode_cadd(state, rd, ASM_RV32_REG_SP); } -void asm_rv32_emit_load_reg_reg_offset(asm_rv32_t *state, mp_uint_t rd, mp_uint_t rs, mp_int_t offset) { - mp_int_t scaled_offset = offset * sizeof(ASM_WORD_SIZE); +static const uint8_t RV32_LOAD_OPCODE_TABLE[3] = { + 0x04, 0x05, 0x02 +}; - if (scaled_offset >= 0 && RV32_IS_IN_C_REGISTER_WINDOW(rd) && RV32_IS_IN_C_REGISTER_WINDOW(rs) && FIT_UNSIGNED(scaled_offset, 6)) { +void asm_rv32_emit_load_reg_reg_offset(asm_rv32_t *state, mp_uint_t rd, mp_uint_t rs, int32_t offset, mp_uint_t operation_size) { + assert(operation_size <= 2 && "Operation size value out of range."); + + int32_t scaled_offset = offset << operation_size; + + if (scaled_offset >= 0 && operation_size == 2 && RV32_IS_IN_C_REGISTER_WINDOW(rd) && RV32_IS_IN_C_REGISTER_WINDOW(rs) && MP_FIT_UNSIGNED(6, scaled_offset)) { // c.lw rd', offset(rs') asm_rv32_opcode_clw(state, RV32_MAP_IN_C_REGISTER_WINDOW(rd), RV32_MAP_IN_C_REGISTER_WINDOW(rs), scaled_offset); return; } - if (FIT_SIGNED(scaled_offset, 12)) { - // lw rd, offset(rs) - asm_rv32_opcode_lw(state, rd, rs, scaled_offset); + if (MP_FIT_SIGNED(12, scaled_offset)) { + // lbu|lhu|lw rd, offset(rs) + asm_rv32_emit_word_opcode(state, RV32_ENCODE_TYPE_I(0x03, RV32_LOAD_OPCODE_TABLE[operation_size], rd, rs, scaled_offset)); return; } @@ -469,12 +475,12 @@ void asm_rv32_emit_load_reg_reg_offset(asm_rv32_t *state, mp_uint_t rd, mp_uint_ mp_uint_t lower = 0; split_immediate(scaled_offset, &upper, &lower); - // lui rd, HI(offset) ; Or c.lui if possible - // c.add rd, rs - // lw rd, LO(offset)(rd) + // lui rd, HI(offset) ; Or c.lui if possible + // c.add rd, rs + // lbu|lhu|lw rd, LO(offset)(rd) load_upper_immediate(state, rd, upper); asm_rv32_opcode_cadd(state, rd, rs); - asm_rv32_opcode_lw(state, rd, rd, lower); + asm_rv32_emit_word_opcode(state, RV32_ENCODE_TYPE_I(0x03, RV32_LOAD_OPCODE_TABLE[operation_size], rd, rd, lower)); } void asm_rv32_emit_jump(asm_rv32_t *state, mp_uint_t label) { @@ -497,12 +503,20 @@ void asm_rv32_emit_jump(asm_rv32_t *state, mp_uint_t label) { asm_rv32_opcode_jalr(state, ASM_RV32_REG_ZERO, REG_TEMP2, lower); } -void asm_rv32_emit_store_reg_reg_offset(asm_rv32_t *state, mp_uint_t rd, mp_uint_t rs, mp_int_t offset) { - mp_int_t scaled_offset = offset * ASM_WORD_SIZE; +void asm_rv32_emit_store_reg_reg_offset(asm_rv32_t *state, mp_uint_t rd, mp_uint_t rs, int32_t offset, mp_uint_t operation_size) { + assert(operation_size <= 2 && "Operation size value out of range."); + + int32_t scaled_offset = offset << operation_size; - if (FIT_SIGNED(scaled_offset, 12)) { - // sw rd, offset(rs) - asm_rv32_opcode_sw(state, rd, rs, scaled_offset); + if (scaled_offset >= 0 && operation_size == 2 && RV32_IS_IN_C_REGISTER_WINDOW(rd) && RV32_IS_IN_C_REGISTER_WINDOW(rs) && MP_FIT_UNSIGNED(6, scaled_offset)) { + // c.sw rd', offset(rs') + asm_rv32_opcode_csw(state, RV32_MAP_IN_C_REGISTER_WINDOW(rd), RV32_MAP_IN_C_REGISTER_WINDOW(rs), scaled_offset); + return; + } + + if (MP_FIT_SIGNED(12, scaled_offset)) { + // sb|sh|sw rd, offset(rs) + asm_rv32_emit_word_opcode(state, RV32_ENCODE_TYPE_S(0x23, operation_size, rs, rd, scaled_offset)); return; } @@ -510,12 +524,12 @@ void asm_rv32_emit_store_reg_reg_offset(asm_rv32_t *state, mp_uint_t rd, mp_uint mp_uint_t lower = 0; split_immediate(scaled_offset, &upper, &lower); - // lui temporary, HI(offset) ; Or c.lui if possible - // c.add temporary, rs - // sw rd, LO(offset)(temporary) + // lui temporary, HI(offset) ; Or c.lui if possible + // c.add temporary, rs + // sb|sh|sw rd, LO(offset)(temporary) load_upper_immediate(state, REG_TEMP2, upper); asm_rv32_opcode_cadd(state, REG_TEMP2, rs); - asm_rv32_opcode_sw(state, rd, REG_TEMP2, lower); + asm_rv32_emit_word_opcode(state, RV32_ENCODE_TYPE_S(0x23, operation_size, REG_TEMP2, rd, lower)); } void asm_rv32_emit_mov_reg_pcrel(asm_rv32_t *state, mp_uint_t rd, mp_uint_t label) { @@ -530,27 +544,6 @@ void asm_rv32_emit_mov_reg_pcrel(asm_rv32_t *state, mp_uint_t rd, mp_uint_t labe asm_rv32_opcode_addi(state, rd, rd, lower); } -void asm_rv32_emit_load16_reg_reg_offset(asm_rv32_t *state, mp_uint_t rd, mp_uint_t rs, mp_int_t offset) { - mp_int_t scaled_offset = offset * sizeof(uint16_t); - - if (FIT_SIGNED(scaled_offset, 12)) { - // lhu rd, offset(rs) - asm_rv32_opcode_lhu(state, rd, rs, scaled_offset); - return; - } - - mp_uint_t upper = 0; - mp_uint_t lower = 0; - split_immediate(scaled_offset, &upper, &lower); - - // lui rd, HI(offset) ; Or c.lui if possible - // c.add rd, rs - // lhu rd, LO(offset)(rd) - load_upper_immediate(state, rd, upper); - asm_rv32_opcode_cadd(state, rd, rs); - asm_rv32_opcode_lhu(state, rd, rd, lower); -} - void asm_rv32_emit_optimised_xor(asm_rv32_t *state, mp_uint_t rd, mp_uint_t rs) { if (rs == rd) { // c.li rd, 0 |