[PULL 15/85] target/arm: Convert disas_adc_sbc to decodetree

[Peter Maydell]

From: Richard Henderson <richard.henderson@linaro.org>

This includes ADC, SBC, ADCS, SBCS.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241211163036.2297116-16-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/tcg/a64.decode      |  6 +++++
 target/arm/tcg/translate-a64.c | 43 +++++++++++++---------------------
 2 files changed, 22 insertions(+), 27 deletions(-)

diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode
index b0cc8bd476e..7a40ca455e4 100644
--- a/target/arm/tcg/a64.decode
+++ b/target/arm/tcg/a64.decode
@@ -746,6 +746,12 @@ ADDS_ext        . 01 01011001 ..... ... ... ..... .....    
 @addsub_ext
 SUBS_ext        . 11 01011001 ..... ... ... ..... .....     @addsub_ext
 
 # Add/subtract (carry)
+
+ADC             . 00 11010000 ..... 000000 ..... .....  @rrr_sf
+ADCS            . 01 11010000 ..... 000000 ..... .....  @rrr_sf
+SBC             . 10 11010000 ..... 000000 ..... .....  @rrr_sf
+SBCS            . 11 11010000 ..... 000000 ..... .....  @rrr_sf
+
 # Rotate right into flags
 # Evaluate into flags
 # Conditional compare (regster)
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 99ff787c61f..d7747fcf575 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -8017,42 +8017,34 @@ TRANS(SMSUBL, do_muladd, a, true, true, MO_SL)
 TRANS(UMADDL, do_muladd, a, true, false, MO_UL)
 TRANS(UMSUBL, do_muladd, a, true, true, MO_UL)
 
-/* Add/subtract (with carry)
- *  31 30 29 28 27 26 25 24 23 22 21  20  16  15       10  9    5 4   0
- * +--+--+--+------------------------+------+-------------+------+-----+
- * |sf|op| S| 1  1  0  1  0  0  0  0 |  rm  | 0 0 0 0 0 0 |  Rn  |  Rd |
- * +--+--+--+------------------------+------+-------------+------+-----+
- */
-
-static void disas_adc_sbc(DisasContext *s, uint32_t insn)
+static bool do_adc_sbc(DisasContext *s, arg_rrr_sf *a,
+                       bool is_sub, bool setflags)
 {
-    unsigned int sf, op, setflags, rm, rn, rd;
     TCGv_i64 tcg_y, tcg_rn, tcg_rd;
 
-    sf = extract32(insn, 31, 1);
-    op = extract32(insn, 30, 1);
-    setflags = extract32(insn, 29, 1);
-    rm = extract32(insn, 16, 5);
-    rn = extract32(insn, 5, 5);
-    rd = extract32(insn, 0, 5);
+    tcg_rd = cpu_reg(s, a->rd);
+    tcg_rn = cpu_reg(s, a->rn);
 
-    tcg_rd = cpu_reg(s, rd);
-    tcg_rn = cpu_reg(s, rn);
-
-    if (op) {
+    if (is_sub) {
         tcg_y = tcg_temp_new_i64();
-        tcg_gen_not_i64(tcg_y, cpu_reg(s, rm));
+        tcg_gen_not_i64(tcg_y, cpu_reg(s, a->rm));
     } else {
-        tcg_y = cpu_reg(s, rm);
+        tcg_y = cpu_reg(s, a->rm);
     }
 
     if (setflags) {
-        gen_adc_CC(sf, tcg_rd, tcg_rn, tcg_y);
+        gen_adc_CC(a->sf, tcg_rd, tcg_rn, tcg_y);
     } else {
-        gen_adc(sf, tcg_rd, tcg_rn, tcg_y);
+        gen_adc(a->sf, tcg_rd, tcg_rn, tcg_y);
     }
+    return true;
 }
 
+TRANS(ADC, do_adc_sbc, a, false, false)
+TRANS(SBC, do_adc_sbc, a, true, false)
+TRANS(ADCS, do_adc_sbc, a, false, true)
+TRANS(SBCS, do_adc_sbc, a, true, true)
+
 /*
  * Rotate right into flags
  *  31 30 29                21       15          10      5  4      0
@@ -8305,10 +8297,6 @@ static void disas_data_proc_reg(DisasContext *s, 
uint32_t insn)
     switch (op2) {
     case 0x0:
         switch (op3) {
-        case 0x00: /* Add/subtract (with carry) */
-            disas_adc_sbc(s, insn);
-            break;
-
         case 0x01: /* Rotate right into flags */
         case 0x21:
             disas_rotate_right_into_flags(s, insn);
@@ -8322,6 +8310,7 @@ static void disas_data_proc_reg(DisasContext *s, uint32_t 
insn)
             break;
 
         default:
+        case 0x00: /* Add/subtract (with carry) */
             goto do_unallocated;
         }
         break;
-- 
2.34.1