[RV64_DYNAREC] A8 TEST opcode (#586)

3 files changed, 37 insertions, 2 deletions

diff --git a/src/dynarec/rv64/dynarec_rv64_00.c b/src/dynarec/rv64/dynarec_rv64_00.c
index 882f3e52..df747374 100644
--- a/src/dynarec/rv64/dynarec_rv64_00.c
+++ b/src/dynarec/rv64/dynarec_rv64_00.c
@@ -483,7 +483,14 @@ uintptr_t dynarec64_00(dynarec_rv64_t* dyn, uintptr_t addr, uintptr_t ip, int ni
                 ZEROUP(xRDX);
             }
             break;
-
+        case 0xA8:
+            INST_NAME("TEST AL, Ib");
+            SETFLAGS(X_ALL, SF_SET_PENDING);
+            ANDI(x1, xRAX, 0xff);
+            u8 = F8;
+            MOV32w(x2, u8);
+            emit_test8(dyn, ninst, x1, x2, x3, x4, x5);
+            break;
         case 0xB8:
         case 0xB9:
         case 0xBA:
diff --git a/src/dynarec/rv64/dynarec_rv64_emit_tests.c b/src/dynarec/rv64/dynarec_rv64_emit_tests.c
index 9ea95d20..4aa41f5b 100644
--- a/src/dynarec/rv64/dynarec_rv64_emit_tests.c
+++ b/src/dynarec/rv64/dynarec_rv64_emit_tests.c
@@ -157,6 +157,34 @@ void emit_cmp32_0(dynarec_rv64_t* dyn, int ninst, rex_t rex, int s1, int s3, int
     }
 }
 
+// emit TEST8 instruction, from test s1, s2, using s3, s4 and s5 as scratch
+void emit_test8(dynarec_rv64_t* dyn, int ninst, int s1, int s2, int s3, int s4, int s5) {
+    CLEAR_FLAGS();
+    IFX_PENDOR0 {
+        SET_DF(s3, d_tst8);
+    } else {
+        SET_DFNONE(s4);
+    }
+
+    AND(s3, s1, s2); // res = s1 & s2
+
+    IFX_PENDOR0 {
+        SD(s3, xEmu, offsetof(x64emu_t, res));
+    }
+    IFX(X_SF) {
+        SRLI(s4, s3, 7);
+        BEQZ(s4, 8);
+        ORI(xFlags, xFlags, 1 << F_SF);
+    }
+    IFX(X_ZF) {
+        BNEZ(s3, 8);
+        ORI(xFlags, xFlags, 1 << F_ZF);
+    }
+    IFX(X_PF) {
+        emit_pf(dyn, ninst, s3, s4, s5);
+    }
+}
+
 // emit TEST32 instruction, from test s1, s2, using s3 and s4 as scratch
 void emit_test32(dynarec_rv64_t* dyn, int ninst, rex_t rex, int s1, int s2, int s3, int s4, int s5)
 {
diff --git a/src/dynarec/rv64/dynarec_rv64_helper.h b/src/dynarec/rv64/dynarec_rv64_helper.h
index 0f1a7c80..f7b15939 100644
--- a/src/dynarec/rv64/dynarec_rv64_helper.h
+++ b/src/dynarec/rv64/dynarec_rv64_helper.h
@@ -612,7 +612,7 @@ void emit_cmp32(dynarec_rv64_t* dyn, int ninst, rex_t rex, int s1, int s2, int s
 void emit_cmp8_0(dynarec_rv64_t* dyn, int ninst, int s1, int s3, int s4);
 //void emit_cmp16_0(dynarec_rv64_t* dyn, int ninst, int s1, int s3, int s4);
 void emit_cmp32_0(dynarec_rv64_t* dyn, int ninst, rex_t rex, int s1, int s3, int s4);
-//void emit_test8(dynarec_rv64_t* dyn, int ninst, int s1, int s2, int s3, int s4, int s5);
+void emit_test8(dynarec_rv64_t* dyn, int ninst, int s1, int s2, int s3, int s4, int s5);
 //void emit_test16(dynarec_rv64_t* dyn, int ninst, int s1, int s2, int s3, int s4, int s5);
 void emit_test32(dynarec_rv64_t* dyn, int ninst, rex_t rex, int s1, int s2, int s3, int s4, int s5);
 void emit_test32c(dynarec_rv64_t* dyn, int ninst, rex_t rex, int s1, int64_t c, int s3, int s4, int s5);