diff options
Diffstat (limited to 'tcg/mips')
| -rw-r--r-- | tcg/mips/tcg-target.c | 125 |
1 files changed, 67 insertions, 58 deletions
diff --git a/tcg/mips/tcg-target.c b/tcg/mips/tcg-target.c index 810f351d19..278925c6ff 100644 --- a/tcg/mips/tcg-target.c +++ b/tcg/mips/tcg-target.c @@ -567,6 +567,73 @@ static inline void tcg_out_addi(TCGContext *s, TCGReg reg, TCGArg val) } } +/* Bit 0 set if inversion required; bit 1 set if swapping required. */ +#define MIPS_CMP_INV 1 +#define MIPS_CMP_SWAP 2 + +static const uint8_t mips_cmp_map[16] = { + [TCG_COND_LT] = 0, + [TCG_COND_LTU] = 0, + [TCG_COND_GE] = MIPS_CMP_INV, + [TCG_COND_GEU] = MIPS_CMP_INV, + [TCG_COND_LE] = MIPS_CMP_INV | MIPS_CMP_SWAP, + [TCG_COND_LEU] = MIPS_CMP_INV | MIPS_CMP_SWAP, + [TCG_COND_GT] = MIPS_CMP_SWAP, + [TCG_COND_GTU] = MIPS_CMP_SWAP, +}; + +static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret, + TCGReg arg1, TCGReg arg2) +{ + MIPSInsn s_opc = OPC_SLTU; + int cmp_map; + + switch (cond) { + case TCG_COND_EQ: + if (arg2 != 0) { + tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2); + arg1 = ret; + } + tcg_out_opc_imm(s, OPC_SLTIU, ret, arg1, 1); + break; + + case TCG_COND_NE: + if (arg2 != 0) { + tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2); + arg1 = ret; + } + tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, arg1); + break; + + case TCG_COND_LT: + case TCG_COND_GE: + case TCG_COND_LE: + case TCG_COND_GT: + s_opc = OPC_SLT; + /* FALLTHRU */ + + case TCG_COND_LTU: + case TCG_COND_GEU: + case TCG_COND_LEU: + case TCG_COND_GTU: + cmp_map = mips_cmp_map[cond]; + if (cmp_map & MIPS_CMP_SWAP) { + TCGReg t = arg1; + arg1 = arg2; + arg2 = t; + } + tcg_out_opc_reg(s, s_opc, ret, arg1, arg2); + if (cmp_map & MIPS_CMP_INV) { + tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); + } + break; + + default: + tcg_abort(); + break; + } +} + static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGArg arg1, TCGArg arg2, int label_index) { @@ -767,64 +834,6 @@ static void tcg_out_movcond(TCGContext *s, TCGCond cond, TCGReg ret, } } -static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret, - TCGArg arg1, TCGArg arg2) -{ - switch (cond) { - case TCG_COND_EQ: - if (arg1 == 0) { - tcg_out_opc_imm(s, OPC_SLTIU, ret, arg2, 1); - } else if (arg2 == 0) { - tcg_out_opc_imm(s, OPC_SLTIU, ret, arg1, 1); - } else { - tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2); - tcg_out_opc_imm(s, OPC_SLTIU, ret, ret, 1); - } - break; - case TCG_COND_NE: - if (arg1 == 0) { - tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, arg2); - } else if (arg2 == 0) { - tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, arg1); - } else { - tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2); - tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, ret); - } - break; - case TCG_COND_LT: - tcg_out_opc_reg(s, OPC_SLT, ret, arg1, arg2); - break; - case TCG_COND_LTU: - tcg_out_opc_reg(s, OPC_SLTU, ret, arg1, arg2); - break; - case TCG_COND_GE: - tcg_out_opc_reg(s, OPC_SLT, ret, arg1, arg2); - tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); - break; - case TCG_COND_GEU: - tcg_out_opc_reg(s, OPC_SLTU, ret, arg1, arg2); - tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); - break; - case TCG_COND_LE: - tcg_out_opc_reg(s, OPC_SLT, ret, arg2, arg1); - tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); - break; - case TCG_COND_LEU: - tcg_out_opc_reg(s, OPC_SLTU, ret, arg2, arg1); - tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); - break; - case TCG_COND_GT: - tcg_out_opc_reg(s, OPC_SLT, ret, arg2, arg1); - break; - case TCG_COND_GTU: - tcg_out_opc_reg(s, OPC_SLTU, ret, arg2, arg1); - break; - default: - tcg_abort(); - break; - } -} - /* XXX: we implement it at the target level to avoid having to handle cross basic blocks temporaries */ static void tcg_out_setcond2(TCGContext *s, TCGCond cond, TCGReg ret, |