From: Philippe Mathieu-Daudé <philmd@linaro.org>
Date: Mon, 21 Oct 2024 14:33:19 +0000 (-0300)
Subject: target/mips: Introduce ase_3d_available() helper
X-Git-Tag: v9.2.0-rc0~20^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=09968fc96cee3d32e03b26b916bd6195f959c3d7;p=thirdparty%2Fqemu.git

target/mips: Introduce ase_3d_available() helper

Determine if the MIPS-3D ASE is implemented by checking
the state of the 3D bit in the FIR CP1 control register.
Remove the then unused ASE_MIPS3D definition.

Note, this allows using MIPS-3D on the mips64dspr2 model.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241021145832.34920-1-philmd@linaro.org>
---

diff --git a/target/mips/cpu-defs.c.inc b/target/mips/cpu-defs.c.inc
index 1ab026c57e7..09bd62d430a 100644
--- a/target/mips/cpu-defs.c.inc
+++ b/target/mips/cpu-defs.c.inc
@@ -663,7 +663,7 @@ const mips_def_t mips_defs[] =
         .CP1_fcr31_rw_bitmask = 0xFF83FFFF,
         .SEGBITS = 40,
         .PABITS = 36,
-        .insn_flags = CPU_MIPS64R1 | ASE_MIPS3D,
+        .insn_flags = CPU_MIPS64R1,
         .mmu_type = MMU_TYPE_R4000,
     },
     {
@@ -692,7 +692,7 @@ const mips_def_t mips_defs[] =
         .CP1_fcr31_rw_bitmask = 0xFF83FFFF,
         .SEGBITS = 42,
         .PABITS = 36,
-        .insn_flags = CPU_MIPS64R2 | ASE_MIPS3D,
+        .insn_flags = CPU_MIPS64R2,
         .mmu_type = MMU_TYPE_R4000,
     },
     {
diff --git a/target/mips/cpu.h b/target/mips/cpu.h
index a4a46ebbe98..3dbfbfdb3d3 100644
--- a/target/mips/cpu.h
+++ b/target/mips/cpu.h
@@ -1319,6 +1319,12 @@ bool cpu_type_supports_cps_smp(const char *cpu_type);
 bool cpu_supports_isa(const CPUMIPSState *env, uint64_t isa_mask);
 bool cpu_type_supports_isa(const char *cpu_type, uint64_t isa);
 
+/* Check presence of MIPS-3D ASE */
+static inline bool ase_3d_available(const CPUMIPSState *env)
+{
+    return env->active_fpu.fcr0 & (1 << FCR0_3D);
+}
+
 /* Check presence of MSA implementation */
 static inline bool ase_msa_available(CPUMIPSState *env)
 {
diff --git a/target/mips/mips-defs.h b/target/mips/mips-defs.h
index a6cebe0265c..6b5cd0d8f53 100644
--- a/target/mips/mips-defs.h
+++ b/target/mips/mips-defs.h
@@ -26,7 +26,6 @@
  *   bits 24-39: MIPS ASEs
  */
 #define ASE_MIPS16        0x0000000001000000ULL
-#define ASE_MIPS3D        0x0000000002000000ULL
 #define ASE_MDMX          0x0000000004000000ULL
 #define ASE_DSP           0x0000000008000000ULL
 #define ASE_DSP_R2        0x0000000010000000ULL
diff --git a/target/mips/tcg/micromips_translate.c.inc b/target/mips/tcg/micromips_translate.c.inc
index 3cbf53bf2b3..c479bec1081 100644
--- a/target/mips/tcg/micromips_translate.c.inc
+++ b/target/mips/tcg/micromips_translate.c.inc
@@ -2484,7 +2484,10 @@ static void decode_micromips32_opc(CPUMIPSState *env, DisasContext *ctx)
             mips32_op = OPC_BC1TANY4;
         do_cp1mips3d:
             check_cop1x(ctx);
-            check_insn(ctx, ASE_MIPS3D);
+            if (!ase_3d_available(env)) {
+                gen_reserved_instruction(ctx);
+                break;
+            }
             /* Fall through */
         do_cp1branch:
             if (env->CP0_Config1 & (1 << CP0C1_FP)) {
diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c
index 2d01f5c4a8b..9a3ae10a919 100644
--- a/target/mips/tcg/translate.c
+++ b/target/mips/tcg/translate.c
@@ -14710,7 +14710,9 @@ static bool decode_opc_legacy(CPUMIPSState *env, DisasContext *ctx)
             } else {
                 /* OPC_BC1ANY2 */
                 check_cop1x(ctx);
-                check_insn(ctx, ASE_MIPS3D);
+                if (!ase_3d_available(env)) {
+                    return false;
+                }
                 gen_compute_branch1(ctx, MASK_BC1(ctx->opcode),
                                     (rt >> 2) & 0x7, imm << 2);
             }
@@ -14725,7 +14727,9 @@ static bool decode_opc_legacy(CPUMIPSState *env, DisasContext *ctx)
             check_cp1_enabled(ctx);
             check_insn_opc_removed(ctx, ISA_MIPS_R6);
             check_cop1x(ctx);
-            check_insn(ctx, ASE_MIPS3D);
+            if (!ase_3d_available(env)) {
+                return false;
+            }
             /* fall through */
         case OPC_BC1:
             check_cp1_enabled(ctx);