target/mips: Introduce 32 R5900 multimedia registers

The 32 R5900 128-bit registers are split into two 64-bit halves:
the lower halves are the GPRs and the upper halves are accessible
by the R5900-specific multimedia instructions.

Reviewed-by: Aleksandar Markovic <[email protected]>
Signed-off-by: Fredrik Noring <[email protected]>
Signed-off-by: Aleksandar Markovic <[email protected]>

diff --git a/target/mips/cpu.h b/target/mips/cpu.h
index 21daf501cec10c3b5a72652569316821a37a23ab..c4da7dfbfd7510db78f9ce491b33f25f78504b81 100644 (file)
--- a/target/mips/cpu.h
+++ b/target/mips/cpu.h
@@ -429,6 +429,9 @@ struct TCState {
 
     float_status msa_fp_status;
 
+    /* Upper 64-bit MMRs (multimedia registers); the lower 64-bit are GPRs */
+    uint64_t mmr[32];
+
 #define NUMBER_OF_MXU_REGISTERS 16
     target_ulong mxu_gpr[NUMBER_OF_MXU_REGISTERS - 1];
     target_ulong mxu_cr;

diff --git a/target/mips/translate.c b/target/mips/translate.c
index 3ac0b1fdbd8e2edc8afc90d05595315dcf03bfda..ab307c410ca121b90cd342424ac3256de8096173 100644 (file)
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -2455,6 +2455,11 @@ static TCGv_i32 fpu_fcr0, fpu_fcr31;
 static TCGv_i64 fpu_f64[32];
 static TCGv_i64 msa_wr_d[64];
 
+#if defined(TARGET_MIPS64)
+/* Upper halves of R5900's 128-bit registers: MMRs (multimedia registers) */
+static TCGv_i64 cpu_mmr[32];
+#endif
+
 #if !defined(TARGET_MIPS64)
 /* MXU registers */
 static TCGv mxu_gpr[NUMBER_OF_MXU_REGISTERS - 1];
@@ -29845,6 +29850,17 @@ void mips_tcg_init(void)
     fpu_fcr31 = tcg_global_mem_new_i32(cpu_env,
                                        offsetof(CPUMIPSState, active_fpu.fcr31),
                                        "fcr31");
+
+#if defined(TARGET_MIPS64)
+    cpu_mmr[0] = NULL;
+    for (i = 1; i < 32; i++) {
+        cpu_mmr[i] = tcg_global_mem_new_i64(cpu_env,
+                                            offsetof(CPUMIPSState,
+                                                     active_tc.mmr[i]),
+                                            regnames[i]);
+    }
+#endif
+
 #if !defined(TARGET_MIPS64)
     for (i = 0; i < NUMBER_OF_MXU_REGISTERS - 1; i++) {
         mxu_gpr[i] = tcg_global_mem_new(cpu_env,