[PATCH 23/35] tcg/mips: Implement neg opcodes

[Richard Henderson]

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20231026041404.1229328-5-richard.henderson@linaro.org>
---
 tcg/mips/tcg-target.h     | 4 ++--
 tcg/mips/tcg-target.c.inc | 8 ++++++++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/tcg/mips/tcg-target.h b/tcg/mips/tcg-target.h
index 5b3fdcc726..20c14224fb 100644
--- a/tcg/mips/tcg-target.h
+++ b/tcg/mips/tcg-target.h
@@ -184,12 +184,12 @@ extern bool use_mips32r2_instructions;
 #endif
 
 /* optional instructions automatically implemented */
-#define TCG_TARGET_HAS_neg_i32          0 /* sub  rd, zero, rt   */
+#define TCG_TARGET_HAS_neg_i32          1
 #define TCG_TARGET_HAS_ext8u_i32        0 /* andi rt, rs, 0xff   */
 #define TCG_TARGET_HAS_ext16u_i32       0 /* andi rt, rs, 0xffff */
 
 #if TCG_TARGET_REG_BITS == 64
-#define TCG_TARGET_HAS_neg_i64          0 /* sub  rd, zero, rt   */
+#define TCG_TARGET_HAS_neg_i64          1
 #define TCG_TARGET_HAS_ext8u_i64        0 /* andi rt, rs, 0xff   */
 #define TCG_TARGET_HAS_ext16u_i64       0 /* andi rt, rs, 0xffff */
 #endif
diff --git a/tcg/mips/tcg-target.c.inc b/tcg/mips/tcg-target.c.inc
index 82b078b9c5..8328dbdecc 100644
--- a/tcg/mips/tcg-target.c.inc
+++ b/tcg/mips/tcg-target.c.inc
@@ -1920,6 +1920,12 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
         tcg_out_opc_reg(s, OPC_MFHI, a1, 0, 0);
         break;
 
+    case INDEX_op_neg_i32:
+        i1 = OPC_SUBU;
+        goto do_unary;
+    case INDEX_op_neg_i64:
+        i1 = OPC_DSUBU;
+        goto do_unary;
     case INDEX_op_not_i32:
     case INDEX_op_not_i64:
         i1 = OPC_NOR;
@@ -2144,6 +2150,7 @@ static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode 
op)
     case INDEX_op_ld16u_i32:
     case INDEX_op_ld16s_i32:
     case INDEX_op_ld_i32:
+    case INDEX_op_neg_i32:
     case INDEX_op_not_i32:
     case INDEX_op_bswap16_i32:
     case INDEX_op_bswap32_i32:
@@ -2157,6 +2164,7 @@ static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode 
op)
     case INDEX_op_ld32s_i64:
     case INDEX_op_ld32u_i64:
     case INDEX_op_ld_i64:
+    case INDEX_op_neg_i64:
     case INDEX_op_not_i64:
     case INDEX_op_bswap16_i64:
     case INDEX_op_bswap32_i64:
-- 
2.34.1