[PATCH v5 14/36] tcg: Add basic data movement for TCGv_i128

From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: alex.bennee@linaro.org, "Philippe Mathieu-Daudé" <philmd@linaro.org>
Subject: [PATCH v5 14/36] tcg: Add basic data movement for TCGv_i128
Date: Wed, 25 Jan 2023 18:38:02 -1000	[thread overview]
Message-ID: <20230126043824.54819-15-richard.henderson@linaro.org> (raw)
In-Reply-To: <20230126043824.54819-1-richard.henderson@linaro.org>

Add code generation functions for data movement between
TCGv_i128 (mov) and to/from TCGv_i64 (concat, extract).

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/tcg/tcg-op.h |  4 ++++
 tcg/tcg-internal.h   | 13 +++++++++++++
 tcg/tcg-op.c         | 20 ++++++++++++++++++++
 3 files changed, 37 insertions(+)

diff --git a/include/tcg/tcg-op.h b/include/tcg/tcg-op.h
index 79b1cf786f..c4276767d1 100644
--- a/include/tcg/tcg-op.h
+++ b/include/tcg/tcg-op.h
@@ -712,6 +712,10 @@ void tcg_gen_extrh_i64_i32(TCGv_i32 ret, TCGv_i64 arg);
 void tcg_gen_extr_i64_i32(TCGv_i32 lo, TCGv_i32 hi, TCGv_i64 arg);
 void tcg_gen_extr32_i64(TCGv_i64 lo, TCGv_i64 hi, TCGv_i64 arg);
 
+void tcg_gen_mov_i128(TCGv_i128 dst, TCGv_i128 src);
+void tcg_gen_extr_i128_i64(TCGv_i64 lo, TCGv_i64 hi, TCGv_i128 arg);
+void tcg_gen_concat_i64_i128(TCGv_i128 ret, TCGv_i64 lo, TCGv_i64 hi);
+
 static inline void tcg_gen_concat32_i64(TCGv_i64 ret, TCGv_i64 lo, TCGv_i64 hi)
 {
     tcg_gen_deposit_i64(ret, lo, hi, 32, 32);
diff --git a/tcg/tcg-internal.h b/tcg/tcg-internal.h
index 33f1d8b411..e542a4e9b7 100644
--- a/tcg/tcg-internal.h
+++ b/tcg/tcg-internal.h
@@ -117,4 +117,17 @@ extern TCGv_i32 TCGV_LOW(TCGv_i64) QEMU_ERROR("32-bit code path is reachable");
 extern TCGv_i32 TCGV_HIGH(TCGv_i64) QEMU_ERROR("32-bit code path is reachable");
 #endif
 
+static inline TCGv_i64 TCGV128_LOW(TCGv_i128 t)
+{
+    /* For 32-bit, offset by 2, which may then have TCGV_{LOW,HIGH} applied. */
+    int o = HOST_BIG_ENDIAN ? 64 / TCG_TARGET_REG_BITS : 0;
+    return temp_tcgv_i64(tcgv_i128_temp(t) + o);
+}
+
+static inline TCGv_i64 TCGV128_HIGH(TCGv_i128 t)
+{
+    int o = HOST_BIG_ENDIAN ? 0 : 64 / TCG_TARGET_REG_BITS;
+    return temp_tcgv_i64(tcgv_i128_temp(t) + o);
+}
+
 #endif /* TCG_INTERNAL_H */
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index 326a9180ef..cb83d2375d 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -2747,6 +2747,26 @@ void tcg_gen_extr32_i64(TCGv_i64 lo, TCGv_i64 hi, TCGv_i64 arg)
     tcg_gen_shri_i64(hi, arg, 32);
 }
 
+void tcg_gen_extr_i128_i64(TCGv_i64 lo, TCGv_i64 hi, TCGv_i128 arg)
+{
+    tcg_gen_mov_i64(lo, TCGV128_LOW(arg));
+    tcg_gen_mov_i64(hi, TCGV128_HIGH(arg));
+}
+
+void tcg_gen_concat_i64_i128(TCGv_i128 ret, TCGv_i64 lo, TCGv_i64 hi)
+{
+    tcg_gen_mov_i64(TCGV128_LOW(ret), lo);
+    tcg_gen_mov_i64(TCGV128_HIGH(ret), hi);
+}
+
+void tcg_gen_mov_i128(TCGv_i128 dst, TCGv_i128 src)
+{
+    if (dst != src) {
+        tcg_gen_mov_i64(TCGV128_LOW(dst), TCGV128_LOW(src));
+        tcg_gen_mov_i64(TCGV128_HIGH(dst), TCGV128_HIGH(src));
+    }
+}
+
 /* QEMU specific operations.  */
 
 void tcg_gen_exit_tb(const TranslationBlock *tb, unsigned idx)
-- 
2.34.1


