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tcg-mips: Simplify movcond

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Use the same table to fold comparisons as with setcond.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2014-04-15 22:53:12 -07:00
parent 3401fd259e
commit 33fac20bb2
1 changed files with 17 additions and 49 deletions
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66
tcg/mips/tcg-target.c
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@ -794,65 +794,33 @@ static void tcg_out_brcond2(TCGContext *s, TCGCond cond, TCGReg al, TCGReg ah,
} }
static void tcg_out_movcond(TCGContext *s, TCGCond cond, TCGReg ret, static void tcg_out_movcond(TCGContext *s, TCGCond cond, TCGReg ret,
TCGArg c1, TCGArg c2, TCGArg v) TCGReg c1, TCGReg c2, TCGReg v)
{ {
MIPSInsn m_opc = OPC_MOVN;
switch (cond) { switch (cond) {
case TCG_COND_EQ: case TCG_COND_EQ:
if (c1 == 0) { m_opc = OPC_MOVZ;
tcg_out_opc_reg(s, OPC_MOVZ, ret, v, c2); /* FALLTHRU */
} else if (c2 == 0) {
tcg_out_opc_reg(s, OPC_MOVZ, ret, v, c1);
} else {
tcg_out_opc_reg(s, OPC_XOR, TCG_TMP0, c1, c2);
tcg_out_opc_reg(s, OPC_MOVZ, ret, v, TCG_TMP0);
}
break;
case TCG_COND_NE: case TCG_COND_NE:
if (c1 == 0) { if (c2 != 0) {
tcg_out_opc_reg(s, OPC_MOVN, ret, v, c2);
} else if (c2 == 0) {
tcg_out_opc_reg(s, OPC_MOVN, ret, v, c1);
} else {
tcg_out_opc_reg(s, OPC_XOR, TCG_TMP0, c1, c2); tcg_out_opc_reg(s, OPC_XOR, TCG_TMP0, c1, c2);
tcg_out_opc_reg(s, OPC_MOVN, ret, v, TCG_TMP0); c1 = TCG_TMP0;
} }
break; break;
case TCG_COND_LT:
tcg_out_opc_reg(s, OPC_SLT, TCG_TMP0, c1, c2);
tcg_out_opc_reg(s, OPC_MOVN, ret, v, TCG_TMP0);
break;
case TCG_COND_LTU:
tcg_out_opc_reg(s, OPC_SLTU, TCG_TMP0, c1, c2);
tcg_out_opc_reg(s, OPC_MOVN, ret, v, TCG_TMP0);
break;
case TCG_COND_GE:
tcg_out_opc_reg(s, OPC_SLT, TCG_TMP0, c1, c2);
tcg_out_opc_reg(s, OPC_MOVZ, ret, v, TCG_TMP0);
break;
case TCG_COND_GEU:
tcg_out_opc_reg(s, OPC_SLTU, TCG_TMP0, c1, c2);
tcg_out_opc_reg(s, OPC_MOVZ, ret, v, TCG_TMP0);
break;
case TCG_COND_LE:
tcg_out_opc_reg(s, OPC_SLT, TCG_TMP0, c2, c1);
tcg_out_opc_reg(s, OPC_MOVZ, ret, v, TCG_TMP0);
break;
case TCG_COND_LEU:
tcg_out_opc_reg(s, OPC_SLTU, TCG_TMP0, c2, c1);
tcg_out_opc_reg(s, OPC_MOVZ, ret, v, TCG_TMP0);
break;
case TCG_COND_GT:
tcg_out_opc_reg(s, OPC_SLT, TCG_TMP0, c2, c1);
tcg_out_opc_reg(s, OPC_MOVN, ret, v, TCG_TMP0);
break;
case TCG_COND_GTU:
tcg_out_opc_reg(s, OPC_SLTU, TCG_TMP0, c2, c1);
tcg_out_opc_reg(s, OPC_MOVN, ret, v, TCG_TMP0);
break;
default: default:
tcg_abort(); /* Minimize code size by prefering a compare not requiring INV. */
if (mips_cmp_map[cond] & MIPS_CMP_INV) {
cond = tcg_invert_cond(cond);
m_opc = OPC_MOVZ;
}
tcg_out_setcond(s, cond, TCG_TMP0, c1, c2);
c1 = TCG_TMP0;
break; break;
} }
tcg_out_opc_reg(s, m_opc, ret, v, c1);
} }
static void tcg_out_call_int(TCGContext *s, tcg_insn_unit *arg, bool tail) static void tcg_out_call_int(TCGContext *s, tcg_insn_unit *arg, bool tail)