target/arm: Convert T16 add pc/sp (immediate)

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-50-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/t16.decode b/target/arm/t16.decode
index 1cf79789ac5296547cbb3f6ea5dfff252b03fe8c..71b3e8f02e1424fd103c48215be76ef66e2fc47f 100644 (file)
--- a/target/arm/t16.decode
+++ b/target/arm/t16.decode
@@ -23,6 +23,7 @@
 &s_rrr_shr       !extern s rn rd rm rs shty
 &s_rri_rot       !extern s rn rd imm rot
 &s_rrrr          !extern s rd rn rm ra
+&ri              !extern rd imm
 &ldst_rr         !extern p w u rn rt rm shimm shtype
 &ldst_ri         !extern p w u rn rt imm
 
@@ -102,3 +103,9 @@ LDRH_ri         10001 ..... ... ...             @ldst_ri_2
 
 STR_ri          10010 ... ........              @ldst_spec_i rn=13
 LDR_ri          10011 ... ........              @ldst_spec_i rn=13
+
+# Add PC/SP (immediate)
+
+ADR             10100 rd:3 ........             imm=%imm8_0x4
+ADD_rri         10101 rd:3 ........ \
+                &s_rri_rot rn=13 s=0 rot=0 imm=%imm8_0x4  # SP

diff --git a/target/arm/translate.c b/target/arm/translate.c
index 4ae73d1c92311ced41c54b69655ad121cfd645ec..d8a4c7bf99397116ab6b5d39f1071a668e37fb3c 100644 (file)
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -10868,19 +10868,9 @@ static void disas_thumb_insn(DisasContext *s, uint32_t insn)
     case 7: /* load/store byte immediate offset, in decodetree */
     case 8: /* load/store halfword immediate offset, in decodetree */
     case 9: /* load/store from stack, in decodetree */
+    case 10: /* add PC/SP (immediate), in decodetree */
         goto illegal_op;
 
-    case 10:
-        /*
-         * 0b1010_xxxx_xxxx_xxxx
-         *  - Add PC/SP (immediate)
-         */
-        rd = (insn >> 8) & 7;
-        val = (insn & 0xff) * 4;
-        tmp = add_reg_for_lit(s, insn & (1 << 11) ? 13 : 15, val);
-        store_reg(s, rd, tmp);
-        break;
-
     case 11:
         /* misc */
         op = (insn >> 8) & 0xf;