From fd3549099110fc114ed7024afedade8891f79499 Mon Sep 17 00:00:00 2001
From: Richard Henderson <richard.henderson@linaro.org>
Date: Thu, 16 May 2019 16:37:31 -0400
Subject: [PATCH] tcg/i386: Support vector absolute value

Backports commit 18f9b65f1a4225dd314cb9b0a8dea968c5bc2ef3 from qemu
---
 qemu/tcg/i386/tcg-target.h     |  2 +-
 qemu/tcg/i386/tcg-target.inc.c | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/qemu/tcg/i386/tcg-target.h b/qemu/tcg/i386/tcg-target.h
index 74eaaa45..fd6e18e7 100644
--- a/qemu/tcg/i386/tcg-target.h
+++ b/qemu/tcg/i386/tcg-target.h
@@ -215,7 +215,7 @@ extern bool have_avx2;
 #define TCG_TARGET_HAS_orc_vec          0
 #define TCG_TARGET_HAS_not_vec          0
 #define TCG_TARGET_HAS_neg_vec          0
-#define TCG_TARGET_HAS_abs_vec          0
+#define TCG_TARGET_HAS_abs_vec          1
 #define TCG_TARGET_HAS_shi_vec          1
 #define TCG_TARGET_HAS_shs_vec          1
 #define TCG_TARGET_HAS_shv_vec          have_avx2
diff --git a/qemu/tcg/i386/tcg-target.inc.c b/qemu/tcg/i386/tcg-target.inc.c
index 4c486508..cd7fc14e 100644
--- a/qemu/tcg/i386/tcg-target.inc.c
+++ b/qemu/tcg/i386/tcg-target.inc.c
@@ -375,6 +375,9 @@ static inline int tcg_target_const_match(tcg_target_long val, TCGType type,
 #define OPC_MOVSLQ	(0x63 | P_REXW)
 #define OPC_MOVZBL	(0xb6 | P_EXT)
 #define OPC_MOVZWL	(0xb7 | P_EXT)
+#define OPC_PABSB       (0x1c | P_EXT38 | P_DATA16)
+#define OPC_PABSW       (0x1d | P_EXT38 | P_DATA16)
+#define OPC_PABSD       (0x1e | P_EXT38 | P_DATA16)
 #define OPC_PACKSSDW    (0x6b | P_EXT | P_DATA16)
 #define OPC_PACKSSWB    (0x63 | P_EXT | P_DATA16)
 #define OPC_PACKUSDW    (0x2b | P_EXT38 | P_DATA16)
@@ -2769,6 +2772,10 @@ static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc,
     static int const sars_insn[4] = {
         OPC_UD2, OPC_PSRAW, OPC_PSRAD, OPC_UD2
     };
+    static int const abs_insn[4] = {
+        /* TODO: AVX512 adds support for MO_64.  */
+        OPC_PABSB, OPC_PABSW, OPC_PABSD, OPC_UD2
+    };
 
     TCGType type = vecl + TCG_TYPE_V64;
     int insn, sub;
@@ -2857,6 +2864,11 @@ static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc,
         insn = OPC_PUNPCKLDQ;
         goto gen_simd;
 #endif
+    case INDEX_op_abs_vec:
+        insn = abs_insn[vece];
+        a2 = a1;
+        a1 = 0;
+        goto gen_simd;
     gen_simd:
         tcg_debug_assert(insn != OPC_UD2);
         if (type == TCG_TYPE_V256) {
@@ -3235,6 +3247,7 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
     case INDEX_op_dup2_vec:
 #endif
         return &x_x_x;
+    case INDEX_op_abs_vec:
     case INDEX_op_dup_vec:
     case INDEX_op_shli_vec:
     case INDEX_op_shri_vec:
@@ -3312,6 +3325,8 @@ int tcg_can_emit_vec_op(TCGOpcode opc, TCGType type, unsigned vece)
     case INDEX_op_umin_vec:
     case INDEX_op_umax_vec:
         return vece <= MO_32 ? 1 : -1;
+    case INDEX_op_abs_vec:
+        return vece <= MO_32;
 
     default:
         return 0;