[PATCH 22/41] target/sparc: Implement FPADDS, FPSUBS

From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: mark.cave-ayland@ilande.co.uk, atar4qemu@gmail.com
Subject: [PATCH 22/41] target/sparc: Implement FPADDS, FPSUBS
Date: Fri,  1 Mar 2024 19:15:42 -1000	[thread overview]
Message-ID: <20240302051601.53649-23-richard.henderson@linaro.org> (raw)
In-Reply-To: <20240302051601.53649-1-richard.henderson@linaro.org>

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/sparc/translate.c  | 82 +++++++++++++++++++++++++++++++++++++++
 target/sparc/insns.decode |  9 +++++
 2 files changed, 91 insertions(+)

diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index 9af30d8fa7..0dc02a3d6e 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -707,6 +707,78 @@ static void gen_op_fpack32(TCGv_i64 dst, TCGv_i64 src1, TCGv_i64 src2)
 #endif
 }
 
+static void gen_op_fpadds16s(TCGv_i32 d, TCGv_i32 src1, TCGv_i32 src2)
+{
+    TCGv_i32 t[2];
+
+    for (int i = 0; i < 2; i++) {
+        TCGv_i32 u = tcg_temp_new_i32();
+        TCGv_i32 v = tcg_temp_new_i32();
+
+        tcg_gen_sextract_i32(u, src1, i * 16, 16);
+        tcg_gen_sextract_i32(v, src2, i * 16, 16);
+        tcg_gen_add_i32(u, u, v);
+        tcg_gen_smax_i32(u, u, tcg_constant_i32(INT16_MIN));
+        tcg_gen_smin_i32(u, u, tcg_constant_i32(INT16_MAX));
+        t[i] = u;
+    }
+    tcg_gen_deposit_i32(d, t[0], t[1], 16, 16);
+}
+
+static void gen_op_fpsubs16s(TCGv_i32 d, TCGv_i32 src1, TCGv_i32 src2)
+{
+    TCGv_i32 t[2];
+
+    for (int i = 0; i < 2; i++) {
+        TCGv_i32 u = tcg_temp_new_i32();
+        TCGv_i32 v = tcg_temp_new_i32();
+
+        tcg_gen_sextract_i32(u, src1, i * 16, 16);
+        tcg_gen_sextract_i32(v, src2, i * 16, 16);
+        tcg_gen_sub_i32(u, u, v);
+        tcg_gen_smax_i32(u, u, tcg_constant_i32(INT16_MIN));
+        tcg_gen_smin_i32(u, u, tcg_constant_i32(INT16_MAX));
+        t[i] = u;
+    }
+    tcg_gen_deposit_i32(d, t[0], t[1], 16, 16);
+}
+
+static void gen_op_fpadds32s(TCGv_i32 d, TCGv_i32 src1, TCGv_i32 src2)
+{
+    TCGv_i32 r = tcg_temp_new_i32();
+    TCGv_i32 t = tcg_temp_new_i32();
+    TCGv_i32 v = tcg_temp_new_i32();
+    TCGv_i32 z = tcg_constant_i32(0);
+
+    tcg_gen_add_i32(r, src1, src2);
+    tcg_gen_xor_i32(t, src1, src2);
+    tcg_gen_xor_i32(v, r, src2);
+    tcg_gen_andc_i32(v, v, t);
+
+    tcg_gen_setcond_i32(TCG_COND_GE, t, r, z);
+    tcg_gen_addi_i32(t, t, INT32_MAX);
+
+    tcg_gen_movcond_i32(TCG_COND_LT, d, v, z, t, r);
+}
+
+static void gen_op_fpsubs32s(TCGv_i32 d, TCGv_i32 src1, TCGv_i32 src2)
+{
+    TCGv_i32 r = tcg_temp_new_i32();
+    TCGv_i32 t = tcg_temp_new_i32();
+    TCGv_i32 v = tcg_temp_new_i32();
+    TCGv_i32 z = tcg_constant_i32(0);
+
+    tcg_gen_sub_i32(r, src1, src2);
+    tcg_gen_xor_i32(t, src1, src2);
+    tcg_gen_xor_i32(v, r, src2);
+    tcg_gen_and_i32(v, v, t);
+
+    tcg_gen_setcond_i32(TCG_COND_GE, t, r, z);
+    tcg_gen_addi_i32(t, t, INT32_MAX);
+
+    tcg_gen_movcond_i32(TCG_COND_LT, d, v, z, t, r);
+}
+
 static void gen_op_faligndata(TCGv_i64 dst, TCGv_i64 s1, TCGv_i64 s2)
 {
 #ifdef TARGET_SPARC64
@@ -4785,6 +4857,11 @@ TRANS(FHSUBs, VIS3, do_fff, a, gen_op_fhsubs)
 TRANS(FNHADDs, VIS3, do_fff, a, gen_op_fnhadds)
 TRANS(FNADDs, VIS3, do_fff, a, gen_op_fnadds)
 
+TRANS(FPADDS16s, VIS3, do_fff, a, gen_op_fpadds16s)
+TRANS(FPSUBS16s, VIS3, do_fff, a, gen_op_fpsubs16s)
+TRANS(FPADDS32s, VIS3, do_fff, a, gen_op_fpadds32s)
+TRANS(FPSUBS32s, VIS3, do_fff, a, gen_op_fpsubs32s)
+
 static bool do_env_fff(DisasContext *dc, arg_r_r_r *a,
                        void (*func)(TCGv_i32, TCGv_env, TCGv_i32, TCGv_i32))
 {
@@ -4867,6 +4944,11 @@ TRANS(FPSUB32, VIS1, do_gvec_ddd, a, MO_32, tcg_gen_gvec_sub)
 TRANS(FCHKSM16, VIS3, do_gvec_ddd, a, MO_16, gen_op_fchksm16)
 TRANS(FMEAN16, VIS3, do_gvec_ddd, a, MO_16, gen_op_fmean16)
 
+TRANS(FPADDS16, VIS3, do_gvec_ddd, a, MO_16, tcg_gen_gvec_ssadd)
+TRANS(FPADDS32, VIS3, do_gvec_ddd, a, MO_32, tcg_gen_gvec_ssadd)
+TRANS(FPSUBS16, VIS3, do_gvec_ddd, a, MO_16, tcg_gen_gvec_sssub)
+TRANS(FPSUBS32, VIS3, do_gvec_ddd, a, MO_32, tcg_gen_gvec_sssub)
+
 static bool do_ddd(DisasContext *dc, arg_r_r_r *a,
                    void (*func)(TCGv_i64, TCGv_i64, TCGv_i64))
 {
diff --git a/target/sparc/insns.decode b/target/sparc/insns.decode
index c9dab4236d..602b4cc648 100644
--- a/target/sparc/insns.decode
+++ b/target/sparc/insns.decode
@@ -448,6 +448,15 @@ FCMPEq      10 000 cc:2 110101 .....  0 0101 0111 .....    \
     FPSUB32s    10 ..... 110110 ..... 0 0101 0111 .....    @r_r_r
     FPSUB64     10 ..... 110110 ..... 0 0100 0110 .....    @d_d_d
 
+    FPADDS16    10 ..... 110110 ..... 0 0101 1000 .....    @d_d_d
+    FPADDS16s   10 ..... 110110 ..... 0 0101 1001 .....    @r_r_r
+    FPADDS32    10 ..... 110110 ..... 0 0101 1010 .....    @d_d_d
+    FPADDS32s   10 ..... 110110 ..... 0 0101 1011 .....    @r_r_r
+    FPSUBS16    10 ..... 110110 ..... 0 0101 1100 .....    @d_d_d
+    FPSUBS16s   10 ..... 110110 ..... 0 0101 1101 .....    @r_r_r
+    FPSUBS32    10 ..... 110110 ..... 0 0101 1110 .....    @d_d_d
+    FPSUBS32s   10 ..... 110110 ..... 0 0101 1111 .....    @r_r_r
+
     FNORd       10 ..... 110110 ..... 0 0110 0010 .....    @d_d_d
     FNORs       10 ..... 110110 ..... 0 0110 0011 .....    @r_r_r
     FANDNOTd    10 ..... 110110 ..... 0 0110 0100 .....    @d_d_d   # FANDNOT2d
-- 
2.34.1


