[Qemu-devel] [PATCH 18/23] target/arm: Implement SVE Stack Allocation Group

[Richard Henderson]

Signed-off-by: Richard Henderson <address@hidden>
---
 target/arm/translate-sve.c | 18 ++++++++++++++++++
 target/arm/sve.def         | 12 ++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index 7e1bf7d623..026af7a162 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -639,6 +639,24 @@ void trans_INDEX_rr(DisasContext *s, arg_INDEX_rr *a, 
uint32_t insn)
     do_index(s, a->esz, a->rd, start, incr);
 }
 
+void trans_ADDVL(DisasContext *s, arg_ADDVL *a, uint32_t insn)
+{
+    TCGv_i64 reg = cpu_reg_sp(s, a->rd);
+    tcg_gen_addi_i64(reg, reg, a->imm * vec_full_reg_size(s));
+}
+
+void trans_ADDPL(DisasContext *s, arg_ADDPL *a, uint32_t insn)
+{
+    TCGv_i64 reg = cpu_reg_sp(s, a->rd);
+    tcg_gen_addi_i64(reg, reg, a->imm * pred_full_reg_size(s));
+}
+
+void trans_RDVL(DisasContext *s, arg_RDVL *a, uint32_t insn)
+{
+    TCGv_i64 reg = cpu_reg(s, a->rd);
+    tcg_gen_movi_i64(reg, a->imm * vec_full_reg_size(s));
+}
+
 static uint64_t pred_esz_mask[4] = {
     0xffffffffffffffffull, 0x5555555555555555ull,
     0x1111111111111111ull, 0x0101010101010101ull
diff --git a/target/arm/sve.def b/target/arm/sve.def
index 0cac3a974f..7428ebc5cd 100644
--- a/target/arm/sve.def
+++ b/target/arm/sve.def
@@ -73,6 +73,9 @@
 # One register operand, with governing predicate, vector element size
 @rd_pg_rn_esz          ........ esz:2 ... ... ... pg:3 rn:5 rd:5       &rpr_esz
 
+# Two register operands with a 6-bit signed immediate.
address@hidden          ........ ... rn:5 ..... imm:s6 rd:5             &rri
+
 # Two register operand, one immediate operand, with predicate, element size 
encoded as TSZHL.
 # User must fill in imm.
 @rdn_pg_tszimm         ........ .. ... ... ... pg:3 ..... rd:5         
&rpri_esz rn=%reg_movprfx esz=%tszimm_esz
@@ -218,6 +221,15 @@ INDEX_ri           00000100 esz:2 1 imm:s5 010001 rn:5 rd:5
 # SVE index generation (register start, register increment)
 INDEX_rr               00000100 .. 1 ..... 010011 ..... .....          
@rd_rn_rm_esz
 
+### SVE Stack Allocation Group
+
+# SVE stack frame adjustment
+ADDVL                  00000100 001 ..... 01010 ...... .....           
@rd_rn_i6
+ADDPL                  00000100 011 ..... 01010 ...... .....           
@rd_rn_i6
+
+# SVE stack frame size
+RDVL                   00000100 101 11111 01010 imm:s6 rd:5
+
 ### SVE Predicate Generation Group
 
 # SVE initialize predicate (PTRUE, PTRUES)
-- 
2.14.3