[Qemu-devel] [PATCH v5 06/16] tcg/ppc: Add support for vector maximum/minimum

[Aleksandar Markovic <aleksandar.markovic@rt-rk.com>]

From: Richard Henderson <richard.henderson@linaro.org>

Add support for vector maximum/minimum using Altivec instructions
VMAXSB, VMAXSH, VMAXSW, VMAXUB, VMAXUH, VMAXUW, and
VMINSB, VMINSH, VMINSW, VMINUB, VMINUH, VMINUW.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
---
 tcg/ppc/tcg-target.h     |  2 +-
 tcg/ppc/tcg-target.inc.c | 40 +++++++++++++++++++++++++++++++++++++++-
 2 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/tcg/ppc/tcg-target.h b/tcg/ppc/tcg-target.h
index b66a808..a86ed57 100644
--- a/tcg/ppc/tcg-target.h
+++ b/tcg/ppc/tcg-target.h
@@ -156,7 +156,7 @@ extern bool have_isa_3_00;
 #define TCG_TARGET_HAS_cmp_vec          1
 #define TCG_TARGET_HAS_mul_vec          0
 #define TCG_TARGET_HAS_sat_vec          0
-#define TCG_TARGET_HAS_minmax_vec       0
+#define TCG_TARGET_HAS_minmax_vec       1
 #define TCG_TARGET_HAS_bitsel_vec       0
 #define TCG_TARGET_HAS_cmpsel_vec       0
 
diff --git a/tcg/ppc/tcg-target.inc.c b/tcg/ppc/tcg-target.inc.c
index d3e4557..e1142e7 100644
--- a/tcg/ppc/tcg-target.inc.c
+++ b/tcg/ppc/tcg-target.inc.c
@@ -474,6 +474,19 @@ static int tcg_target_const_match(tcg_target_long val, TCGType type,
 #define STVX       XO31(231)
 #define STVEWX     XO31(199)
 
+#define VMAXSB     VX4(258)
+#define VMAXSH     VX4(322)
+#define VMAXSW     VX4(386)
+#define VMAXUB     VX4(2)
+#define VMAXUH     VX4(66)
+#define VMAXUW     VX4(130)
+#define VMINSB     VX4(770)
+#define VMINSH     VX4(834)
+#define VMINSW     VX4(898)
+#define VMINUB     VX4(514)
+#define VMINUH     VX4(578)
+#define VMINUW     VX4(642)
+
 #define VCMPEQUB   VX4(6)
 #define VCMPEQUH   VX4(70)
 #define VCMPEQUW   VX4(134)
@@ -2818,6 +2831,11 @@ int tcg_can_emit_vec_op(TCGOpcode opc, TCGType type, unsigned vece)
     case INDEX_op_andc_vec:
     case INDEX_op_not_vec:
         return 1;
+    case INDEX_op_smax_vec:
+    case INDEX_op_smin_vec:
+    case INDEX_op_umax_vec:
+    case INDEX_op_umin_vec:
+        return vece <= MO_32;
     case INDEX_op_cmp_vec:
         return vece <= MO_32 ? -1 : 0;
     default:
@@ -2916,7 +2934,11 @@ static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc,
     static const uint32_t
         eq_op[4]  = { VCMPEQUB, VCMPEQUH, VCMPEQUW, 0 },
         gts_op[4] = { VCMPGTSB, VCMPGTSH, VCMPGTSW, 0 },
-        gtu_op[4] = { VCMPGTUB, VCMPGTUH, VCMPGTUW, 0 };
+        gtu_op[4] = { VCMPGTUB, VCMPGTUH, VCMPGTUW, 0 },
+        umin_op[4] = { VMINUB, VMINUH, VMINUW, 0 },
+        smin_op[4] = { VMINSB, VMINSH, VMINSW, 0 },
+        umax_op[4] = { VMAXUB, VMAXUH, VMAXUW, 0 },
+        smax_op[4] = { VMAXSB, VMAXSH, VMAXSW, 0 };
 
     TCGType type = vecl + TCG_TYPE_V64;
     TCGArg a0 = args[0], a1 = args[1], a2 = args[2];
@@ -2933,6 +2955,18 @@ static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc,
         tcg_out_dupm_vec(s, type, vece, a0, a1, a2);
         return;
 
+    case INDEX_op_smin_vec:
+        insn = smin_op[vece];
+        break;
+    case INDEX_op_umin_vec:
+        insn = umin_op[vece];
+        break;
+    case INDEX_op_smax_vec:
+        insn = smax_op[vece];
+        break;
+    case INDEX_op_umax_vec:
+        insn = umax_op[vece];
+        break;
     case INDEX_op_and_vec:
         insn = VAND;
         break;
@@ -3225,6 +3259,10 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
     case INDEX_op_andc_vec:
     case INDEX_op_orc_vec:
     case INDEX_op_cmp_vec:
+    case INDEX_op_smax_vec:
+    case INDEX_op_smin_vec:
+    case INDEX_op_umax_vec:
+    case INDEX_op_umin_vec:
         return &v_v_v;
     case INDEX_op_not_vec:
     case INDEX_op_dup_vec:
-- 
2.7.4