target/loongarch: Implement vavg/vavgr
This patch includes:
- VAVG.{B/H/W/D}[U];
- VAVGR.{B/H/W/D}[U].
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230504122810.4094787-11-gaosong@loongson.cn>
diff --git a/target/loongarch/lsx_helper.c b/target/loongarch/lsx_helper.c
index 6d391f7..b683a1c 100644
--- a/target/loongarch/lsx_helper.c
+++ b/target/loongarch/lsx_helper.c
@@ -275,3 +275,35 @@
DO_ODD_U_S(vaddwod_h_bu_b, 16, H, UH, B, UB, DO_ADD)
DO_ODD_U_S(vaddwod_w_hu_h, 32, W, UW, H, UH, DO_ADD)
DO_ODD_U_S(vaddwod_d_wu_w, 64, D, UD, W, UW, DO_ADD)
+
+#define DO_VAVG(a, b) ((a >> 1) + (b >> 1) + (a & b & 1))
+#define DO_VAVGR(a, b) ((a >> 1) + (b >> 1) + ((a | b) & 1))
+
+#define DO_3OP(NAME, BIT, E, DO_OP) \
+void HELPER(NAME)(void *vd, void *vj, void *vk, uint32_t v) \
+{ \
+ int i; \
+ VReg *Vd = (VReg *)vd; \
+ VReg *Vj = (VReg *)vj; \
+ VReg *Vk = (VReg *)vk; \
+ for (i = 0; i < LSX_LEN/BIT; i++) { \
+ Vd->E(i) = DO_OP(Vj->E(i), Vk->E(i)); \
+ } \
+}
+
+DO_3OP(vavg_b, 8, B, DO_VAVG)
+DO_3OP(vavg_h, 16, H, DO_VAVG)
+DO_3OP(vavg_w, 32, W, DO_VAVG)
+DO_3OP(vavg_d, 64, D, DO_VAVG)
+DO_3OP(vavgr_b, 8, B, DO_VAVGR)
+DO_3OP(vavgr_h, 16, H, DO_VAVGR)
+DO_3OP(vavgr_w, 32, W, DO_VAVGR)
+DO_3OP(vavgr_d, 64, D, DO_VAVGR)
+DO_3OP(vavg_bu, 8, UB, DO_VAVG)
+DO_3OP(vavg_hu, 16, UH, DO_VAVG)
+DO_3OP(vavg_wu, 32, UW, DO_VAVG)
+DO_3OP(vavg_du, 64, UD, DO_VAVG)
+DO_3OP(vavgr_bu, 8, UB, DO_VAVGR)
+DO_3OP(vavgr_hu, 16, UH, DO_VAVGR)
+DO_3OP(vavgr_wu, 32, UW, DO_VAVGR)
+DO_3OP(vavgr_du, 64, UD, DO_VAVGR)
