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path: root/tcg/mips/tcg-target.c
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Diffstat (limited to 'tcg/mips/tcg-target.c')
-rw-r--r--tcg/mips/tcg-target.c40
1 files changed, 36 insertions, 4 deletions
diff --git a/tcg/mips/tcg-target.c b/tcg/mips/tcg-target.c
index 1429ec715e..ccf262b217 100644
--- a/tcg/mips/tcg-target.c
+++ b/tcg/mips/tcg-target.c
@@ -701,6 +701,40 @@ static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1,
tcg_out_nop(s);
}
+static TCGReg tcg_out_reduce_eq2(TCGContext *s, TCGReg tmp0, TCGReg tmp1,
+ TCGReg al, TCGReg ah,
+ TCGReg bl, TCGReg bh)
+{
+ /* Merge highpart comparison into AH. */
+ if (bh != 0) {
+ if (ah != 0) {
+ tcg_out_opc_reg(s, OPC_XOR, tmp0, ah, bh);
+ ah = tmp0;
+ } else {
+ ah = bh;
+ }
+ }
+ /* Merge lowpart comparison into AL. */
+ if (bl != 0) {
+ if (al != 0) {
+ tcg_out_opc_reg(s, OPC_XOR, tmp1, al, bl);
+ al = tmp1;
+ } else {
+ al = bl;
+ }
+ }
+ /* Merge high and low part comparisons into AL. */
+ if (ah != 0) {
+ if (al != 0) {
+ tcg_out_opc_reg(s, OPC_OR, tmp0, ah, al);
+ al = tmp0;
+ } else {
+ al = ah;
+ }
+ }
+ return al;
+}
+
static void tcg_out_setcond2(TCGContext *s, TCGCond cond, TCGReg ret,
TCGReg al, TCGReg ah, TCGReg bl, TCGReg bh)
{
@@ -716,10 +750,8 @@ static void tcg_out_setcond2(TCGContext *s, TCGCond cond, TCGReg ret,
switch (cond) {
case TCG_COND_EQ:
case TCG_COND_NE:
- tcg_out_setcond(s, cond, tmp0, ah, bh);
- tcg_out_setcond(s, cond, ret, al, bl);
- tcg_out_opc_reg(s, (cond == TCG_COND_EQ ? OPC_AND : OPC_OR),
- ret, ret, tmp0);
+ tmp1 = tcg_out_reduce_eq2(s, tmp0, tmp1, al, ah, bl, bh);
+ tcg_out_setcond(s, cond, ret, tmp1, TCG_REG_ZERO);
break;
default: