[PATCH v3 072/162] tcg/mips: Support negsetcond

[Richard Henderson]

Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
 tcg/mips/tcg-target-has.h |  4 ++--
 tcg/mips/tcg-target.c.inc | 25 +++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/tcg/mips/tcg-target-has.h b/tcg/mips/tcg-target-has.h
index 05701fd228..c77d4296cf 100644
--- a/tcg/mips/tcg-target-has.h
+++ b/tcg/mips/tcg-target-has.h
@@ -41,7 +41,7 @@ extern bool use_mips32r2_instructions;
 /* optional instructions */
 #define TCG_TARGET_HAS_bswap16_i32      1
 #define TCG_TARGET_HAS_bswap32_i32      1
-#define TCG_TARGET_HAS_negsetcond_i32   0
+#define TCG_TARGET_HAS_negsetcond_i32   1
 
 #if TCG_TARGET_REG_BITS == 64
 #define TCG_TARGET_HAS_add2_i32         0
@@ -51,7 +51,7 @@ extern bool use_mips32r2_instructions;
 #define TCG_TARGET_HAS_sub2_i64         0
 #define TCG_TARGET_HAS_ext32s_i64       1
 #define TCG_TARGET_HAS_ext32u_i64       1
-#define TCG_TARGET_HAS_negsetcond_i64   0
+#define TCG_TARGET_HAS_negsetcond_i64   1
 #endif
 
 /* optional instructions detected at runtime */
diff --git a/tcg/mips/tcg-target.c.inc b/tcg/mips/tcg-target.c.inc
index 94e79c13e5..f6593b2627 100644
--- a/tcg/mips/tcg-target.c.inc
+++ b/tcg/mips/tcg-target.c.inc
@@ -959,6 +959,25 @@ static void tcg_out_setcond(TCGContext *s, TCGCond cond, 
TCGReg ret,
     tcg_out_setcond_end(s, ret, tmpflags);
 }
 
+static void tcg_out_negsetcond(TCGContext *s, TCGCond cond, TCGReg ret,
+                               TCGReg arg1, TCGReg arg2)
+{
+    int tmpflags = tcg_out_setcond_int(s, cond, ret, arg1, arg2);
+    TCGReg tmp = tmpflags & ~SETCOND_FLAGS;
+
+    /* If intermediate result is zero/non-zero: test != 0. */
+    if (tmpflags & SETCOND_NEZ) {
+        tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, tmp);
+        tmp = ret;
+    }
+    /* Produce the 0/-1 result. */
+    if (tmpflags & SETCOND_INV) {
+        tcg_out_opc_imm(s, OPC_ADDIU, ret, tmp, -1);
+    } else {
+        tcg_out_opc_reg(s, OPC_SUBU, ret, TCG_REG_ZERO, tmp);
+    }
+}
+
 static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1,
                            TCGReg arg2, TCGLabel *l)
 {
@@ -2276,6 +2295,10 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, 
TCGType type,
     case INDEX_op_setcond_i64:
         tcg_out_setcond(s, args[3], a0, a1, a2);
         break;
+    case INDEX_op_negsetcond_i32:
+    case INDEX_op_negsetcond_i64:
+        tcg_out_negsetcond(s, args[3], a0, a1, a2);
+        break;
     case INDEX_op_setcond2_i32:
         tcg_out_setcond2(s, args[5], a0, a1, a2, args[3], args[4]);
         break;
@@ -2370,6 +2393,8 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned 
flags)
 
     case INDEX_op_setcond_i32:
     case INDEX_op_setcond_i64:
+    case INDEX_op_negsetcond_i32:
+    case INDEX_op_negsetcond_i64:
         return C_O1_I2(r, rz, rz);
 
     case INDEX_op_deposit_i32:
-- 
2.43.0