diff options
Diffstat (limited to 'gcc/config/avr/avr.c')
| -rw-r--r-- | gcc/config/avr/avr.c | 75 |
1 files changed, 74 insertions, 1 deletions
diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c index 5167ee65..67e6d52 100644 --- a/gcc/config/avr/avr.c +++ b/gcc/config/avr/avr.c @@ -5233,7 +5233,7 @@ jump_over_one_insn_p (insn, dest) : dest); int jump_addr = INSN_ADDRESSES (INSN_UID (insn)); int dest_addr = INSN_ADDRESSES (uid); - return dest_addr - jump_addr == 2; + return dest_addr - jump_addr == get_attr_length (insn) + 1; } /* Returns 1 if a value of mode MODE can be stored starting with hard @@ -5451,3 +5451,76 @@ avr_peep2_scratch_safe (scratch) } return 1; } + +/* Output a branch that tests a single bit of a register (QI, HI or SImode) + or memory location in the I/O space (QImode only). + + Operand 0: comparison operator (must be EQ or NE, compare bit to zero). + Operand 1: register operand to test, or CONST_INT memory address. + Operand 2: bit number (for QImode operand) or mask (HImode, SImode). + Operand 3: label to jump to if the test is true. */ + +const char * +avr_out_sbxx_branch (insn, operands) + rtx insn; + rtx operands[]; +{ + enum rtx_code comp = GET_CODE (operands[0]); + int long_jump = (get_attr_length (insn) >= 4); + int reverse = long_jump || jump_over_one_insn_p (insn, operands[3]); + + if (comp == GE) + comp = EQ; + else if (comp == LT) + comp = NE; + + if (reverse) + comp = reverse_condition (comp); + + if (GET_CODE (operands[1]) == CONST_INT) + { + if (INTVAL (operands[1]) < 0x40) + { + if (comp == EQ) + output_asm_insn (AS2 (sbis,%1-0x20,%2), operands); + else + output_asm_insn (AS2 (sbic,%1-0x20,%2), operands); + } + else + { + output_asm_insn (AS2 (in,__tmp_reg__,%1-0x20), operands); + if (comp == EQ) + output_asm_insn (AS2 (sbrs,__tmp_reg__,%2), operands); + else + output_asm_insn (AS2 (sbrc,__tmp_reg__,%2), operands); + } + } + else /* GET_CODE (operands[1]) == REG */ + { + if (GET_MODE (operands[1]) == QImode) + { + if (comp == EQ) + output_asm_insn (AS2 (sbrs,%1,%2), operands); + else + output_asm_insn (AS2 (sbrc,%1,%2), operands); + } + else /* HImode or SImode */ + { + static char buf[] = "sbrc %A1,0"; + int bit_nr = exact_log2 (INTVAL (operands[2]) + & GET_MODE_MASK (GET_MODE (operands[1]))); + + buf[3] = (comp == EQ) ? 's' : 'c'; + buf[6] = 'A' + (bit_nr >> 3); + buf[9] = '0' + (bit_nr & 7); + output_asm_insn (buf, operands); + } + } + + if (long_jump) + return (AS1 (rjmp,_PC_+4) CR_TAB + AS1 (jmp,%3)); + if (!reverse) + return AS1 (rjmp,%3); + return ""; +} |