diff mbox series

[v2,2/7] target/sparc: Fix FEXPAND

Message ID 20240502165528.244004-3-richard.henderson@linaro.org
State Superseded
Headers show
Series target/sparc: vis fixes | expand

Commit Message

Richard Henderson May 2, 2024, 4:55 p.m. UTC 
This is a 2-operand instruction, not 3-operand.
Worse, we took the source from the wrong operand.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/sparc/helper.h     |  2 +-
 target/sparc/insns.decode |  2 +-
 target/sparc/translate.c  | 20 +++++++++++++++++++-
 target/sparc/vis_helper.c |  6 +++---
 4 files changed, 24 insertions(+), 6 deletions(-)

Comments

Philippe Mathieu-Daudé May 3, 2024, 6:34 p.m. UTC | #1 
On 2/5/24 18:55, Richard Henderson wrote:
> This is a 2-operand instruction, not 3-operand.
> Worse, we took the source from the wrong operand.
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   target/sparc/helper.h     |  2 +-
>   target/sparc/insns.decode |  2 +-
>   target/sparc/translate.c  | 20 +++++++++++++++++++-
>   target/sparc/vis_helper.c |  6 +++---
>   4 files changed, 24 insertions(+), 6 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff mbox series

Patch

diff --git a/target/sparc/helper.h b/target/sparc/helper.h
index b8087d0d2b..57ab755ffd 100644
--- a/target/sparc/helper.h
+++ b/target/sparc/helper.h
@@ -102,7 +102,7 @@  DEF_HELPER_FLAGS_2(fmul8sux16, TCG_CALL_NO_RWG_SE, i64, i64, i64)
 DEF_HELPER_FLAGS_2(fmul8ulx16, TCG_CALL_NO_RWG_SE, i64, i64, i64)
 DEF_HELPER_FLAGS_2(fmuld8sux16, TCG_CALL_NO_RWG_SE, i64, i64, i64)
 DEF_HELPER_FLAGS_2(fmuld8ulx16, TCG_CALL_NO_RWG_SE, i64, i64, i64)
-DEF_HELPER_FLAGS_2(fexpand, TCG_CALL_NO_RWG_SE, i64, i64, i64)
+DEF_HELPER_FLAGS_1(fexpand, TCG_CALL_NO_RWG_SE, i64, i32)
 DEF_HELPER_FLAGS_3(pdist, TCG_CALL_NO_RWG_SE, i64, i64, i64, i64)
 DEF_HELPER_FLAGS_2(fpack16, TCG_CALL_NO_RWG_SE, i32, i64, i64)
 DEF_HELPER_FLAGS_3(fpack32, TCG_CALL_NO_RWG_SE, i64, i64, i64, i64)
diff --git a/target/sparc/insns.decode b/target/sparc/insns.decode
index 2d26404cb2..e2d8a07dc4 100644
--- a/target/sparc/insns.decode
+++ b/target/sparc/insns.decode
@@ -352,7 +352,7 @@  FCMPEq      10 000 cc:2 110101 rs1:5  0 0101 0111 rs2:5
     FALIGNDATAg 10 ..... 110110 ..... 0 0100 1000 .....    @r_r_r
     FPMERGE     10 ..... 110110 ..... 0 0100 1011 .....    @r_r_r
     BSHUFFLE    10 ..... 110110 ..... 0 0100 1100 .....    @r_r_r
-    FEXPAND     10 ..... 110110 ..... 0 0100 1101 .....    @r_r_r
+    FEXPAND     10 ..... 110110 00000 0 0100 1101 .....    @r_r2
 
     FSRCd       10 ..... 110110 ..... 0 0111 0100 00000    @r_r1  # FSRC1d
     FSRCs       10 ..... 110110 ..... 0 0111 0101 00000    @r_r1  # FSRC1s
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index 571b3e3f03..dfcfe855a1 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -4358,6 +4358,25 @@  TRANS(FSQRTd, ALL, do_env_dd, a, gen_helper_fsqrtd)
 TRANS(FxTOd, 64, do_env_dd, a, gen_helper_fxtod)
 TRANS(FdTOx, 64, do_env_dd, a, gen_helper_fdtox)
 
+static bool do_df(DisasContext *dc, arg_r_r *a,
+                  void (*func)(TCGv_i64, TCGv_i32))
+{
+    TCGv_i64 dst;
+    TCGv_i32 src;
+
+    if (gen_trap_ifnofpu(dc)) {
+        return true;
+    }
+
+    dst = tcg_temp_new_i64();
+    src = gen_load_fpr_F(dc, a->rs);
+    func(dst, src);
+    gen_store_fpr_D(dc, a->rd, dst);
+    return advance_pc(dc);
+}
+
+TRANS(FEXPAND, VIS1, do_df, a, gen_helper_fexpand)
+
 static bool do_env_df(DisasContext *dc, arg_r_r *a,
                       void (*func)(TCGv_i64, TCGv_env, TCGv_i32))
 {
@@ -4589,7 +4608,6 @@  TRANS(FMUL8ULx16, VIS1, do_ddd, a, gen_helper_fmul8ulx16)
 TRANS(FMULD8SUx16, VIS1, do_ddd, a, gen_helper_fmuld8sux16)
 TRANS(FMULD8ULx16, VIS1, do_ddd, a, gen_helper_fmuld8ulx16)
 TRANS(FPMERGE, VIS1, do_ddd, a, gen_helper_fpmerge)
-TRANS(FEXPAND, VIS1, do_ddd, a, gen_helper_fexpand)
 
 TRANS(FPADD16, VIS1, do_ddd, a, tcg_gen_vec_add16_i64)
 TRANS(FPADD32, VIS1, do_ddd, a, tcg_gen_vec_add32_i64)
diff --git a/target/sparc/vis_helper.c b/target/sparc/vis_helper.c
index 7763b16c24..db2e6dd6c1 100644
--- a/target/sparc/vis_helper.c
+++ b/target/sparc/vis_helper.c
@@ -260,13 +260,13 @@  uint64_t helper_fmuld8ulx16(uint64_t src1, uint64_t src2)
     return d.ll;
 }
 
-uint64_t helper_fexpand(uint64_t src1, uint64_t src2)
+uint64_t helper_fexpand(uint32_t src2)
 {
     VIS32 s;
     VIS64 d;
 
-    s.l = (uint32_t)src1;
-    d.ll = src2;
+    s.l = src2;
+    d.ll = 0;
     d.VIS_W64(0) = s.VIS_B32(0) << 4;
     d.VIS_W64(1) = s.VIS_B32(1) << 4;
     d.VIS_W64(2) = s.VIS_B32(2) << 4;