[PATCH 47/61] target/arm: Implement SME2 FCVT (widening), FCVTL

[Richard Henderson]

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/tcg/helper-sme.h    |  2 ++
 target/arm/tcg/sme_helper.c    | 38 ++++++++++++++++++++++++++++++++++
 target/arm/tcg/translate-sme.c |  5 +++++
 target/arm/tcg/sme.decode      |  5 +++++
 4 files changed, 50 insertions(+)

diff --git a/target/arm/tcg/helper-sme.h b/target/arm/tcg/helper-sme.h
index cb81f89fb3..04db920299 100644
--- a/target/arm/tcg/helper-sme.h
+++ b/target/arm/tcg/helper-sme.h
@@ -218,3 +218,5 @@ DEF_HELPER_FLAGS_4(sme2_bfcvt, TCG_CALL_NO_RWG, void, ptr, 
ptr, fpst, i32)
 DEF_HELPER_FLAGS_4(sme2_bfcvtn, TCG_CALL_NO_RWG, void, ptr, ptr, fpst, i32)
 DEF_HELPER_FLAGS_4(sme2_fcvt_n, TCG_CALL_NO_RWG, void, ptr, ptr, fpst, i32)
 DEF_HELPER_FLAGS_4(sme2_fcvtn, TCG_CALL_NO_RWG, void, ptr, ptr, fpst, i32)
+DEF_HELPER_FLAGS_4(sme2_fcvt_w, TCG_CALL_NO_RWG, void, ptr, ptr, fpst, i32)
+DEF_HELPER_FLAGS_4(sme2_fcvtl, TCG_CALL_NO_RWG, void, ptr, ptr, fpst, i32)
diff --git a/target/arm/tcg/sme_helper.c b/target/arm/tcg/sme_helper.c
index 6d2b83d26a..8289a02bfa 100644
--- a/target/arm/tcg/sme_helper.c
+++ b/target/arm/tcg/sme_helper.c
@@ -1562,3 +1562,41 @@ void HELPER(sme2_fcvtn)(void *vd, void *vs, float_status 
*fpst, uint32_t desc)
         d[H2(i * 2 + 1)] = d1;
     }
 }
+
+/* Expand and convert */
+void HELPER(sme2_fcvt_w)(void *vd, void *vs, float_status *fpst, uint32_t desc)
+{
+    ARMVectorReg scratch __attribute__((uninitialized));
+    size_t oprsz = simd_oprsz(desc);
+    size_t i, n = oprsz / 4;
+    float16 *s = vs;
+    float32 *d0 = vd;
+    float32 *d1 = vd + sizeof(ARMVectorReg);
+
+    if (vd == vs) {
+        s = memcpy(&scratch, s, oprsz);
+    }
+
+    for (i = 0; i < n; ++i) {
+        d0[H4(i)] = float16_to_float32(s[H2(i)], true, fpst);
+    }
+    for (i = 0; i < n; ++i) {
+        d1[H4(i)] = float16_to_float32(s[H2(n + i)], true, fpst);
+    }
+}
+
+/* Deinterleave and convert. */
+void HELPER(sme2_fcvtl)(void *vd, void *vs, float_status *fpst, uint32_t desc)
+{
+    size_t i, n = simd_oprsz(desc) / 4;
+    float16 *s = vs;
+    float32 *d0 = vd;
+    float32 *d1 = vd + sizeof(ARMVectorReg);
+
+    for (i = 0; i < n; ++i) {
+        float32 v0 = float16_to_float32(s[H2(i * 2 + 0)], true, fpst);
+        float32 v1 = float16_to_float32(s[H2(i * 2 + 1)], true, fpst);
+        d0[H4(i)] = v0;
+        d1[H4(i)] = v1;
+    }
+}
diff --git a/target/arm/tcg/translate-sme.c b/target/arm/tcg/translate-sme.c
index 777ea15a80..2b45244e23 100644
--- a/target/arm/tcg/translate-sme.c
+++ b/target/arm/tcg/translate-sme.c
@@ -1288,3 +1288,8 @@ TRANS_FEAT(FCVT_n, aa64_sme2, do_zz_fpst, a, 0,
            FPST_A64, gen_helper_sme2_fcvt_n)
 TRANS_FEAT(FCVTN, aa64_sme2, do_zz_fpst, a, 0,
            FPST_A64, gen_helper_sme2_fcvtn)
+
+TRANS_FEAT(FCVT_w, aa64_sme2_f16f16, do_zz_fpst, a, 0,
+           FPST_A64_F16, gen_helper_sme2_fcvt_w)
+TRANS_FEAT(FCVTL, aa64_sme2_f16f16, do_zz_fpst, a, 0,
+           FPST_A64_F16, gen_helper_sme2_fcvtl)
diff --git a/target/arm/tcg/sme.decode b/target/arm/tcg/sme.decode
index 8cca7d0d46..644794bdc1 100644
--- a/target/arm/tcg/sme.decode
+++ b/target/arm/tcg/sme.decode
@@ -725,9 +725,14 @@ FMLS_nx_d       11000001 1101 .... 1 .. 00. ...00 10 ...   
 @azx_4x1_i1_o3
 &zz_n           zd zn n
 @zz_1x2         ........ ... ..... ...... ..... zd:5        \
                 &zz_n n=1 zn=%zn_ax2
+@zz_2x1         ........ ... ..... ...... zn:5  .....       \
+                &zz_n n=1 zd=%zd_ax2
 
 BFCVT           11000001 011 00000 111000 ....0 .....       @zz_1x2
 BFCVTN          11000001 011 00000 111000 ....1 .....       @zz_1x2
 
 FCVT_n          11000001 001 00000 111000 ....0 .....       @zz_1x2
 FCVTN           11000001 001 00000 111000 ....1 .....       @zz_1x2
+
+FCVT_w          11000001 101 00000 111000 ..... ....0       @zz_2x1
+FCVTL           11000001 101 00000 111000 ..... ....1       @zz_2x1
-- 
2.43.0