Added ISUB_R instruction

src/configuration.h

@@ -84,7 +84,7 @@ Total sum of frequencies must be 256
 //Integer instructions
 #define RANDOMX_FREQ_IADD_RS       16
 #define RANDOMX_FREQ_IADD_M         7
-#define RANDOMX_FREQ_ISUB_R         0
+#define RANDOMX_FREQ_ISUB_R        16
 #define RANDOMX_FREQ_ISUB_M         0
 #define RANDOMX_FREQ_IMUL_R         0
 #define RANDOMX_FREQ_IMUL_M         0
@@ -119,7 +119,7 @@ Total sum of frequencies must be 256
 #define RANDOMX_FREQ_ISTORE         0
 
 //No-op instruction
-#define RANDOMX_FREQ_NOP          233
+#define RANDOMX_FREQ_NOP          217
 /*                               ------
                                   256
 */

src/instruction_weights.hpp

@@ -65,8 +65,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define REP40(x) REP32(x) REP8(x)
 #define REP64(x) REP32(x) REP32(x)
 #define REP128(x) REP32(x) REP32(x) REP32(x) REP32(x)
+#define REP217(x) REP128(x) REP64(x) REP25(x)
 #define REP232(x) REP128(x) REP40(x) REP40(x) REP24(x)
-#define REP233(x) REP128(x) REP64(x) REP32(x) REP9(x)
 #define REP256(x) REP128(x) REP128(x)
 #define REPNX(x,N) REP##N(x)
 #define REPN(x,N) REPNX(x,N)

src/jit_compiler_a64.cpp

@@ -37,6 +37,7 @@ constexpr uint32_t B          = 0x14000000;
 constexpr uint32_t EOR        = 0xCA000000;
 constexpr uint32_t EOR32      = 0x4A000000;
 constexpr uint32_t ADD        = 0x8B000000;
+constexpr uint32_t SUB        = 0xCB000000;
 constexpr uint32_t MOVZ       = 0xD2800000;
 constexpr uint32_t MOVN       = 0x92800000;
 constexpr uint32_t MOVK       = 0xF2800000;
@@ -226,6 +227,26 @@ void JitCompilerA64::h_IADD_M(Instruction& instr, int i, uint32_t& codePos)
 	codePos = k;
 }
 
+void JitCompilerA64::h_ISUB_R(Instruction& instr, int i, uint32_t& codePos)
+{
+	uint32_t k = codePos;
+
+	const uint32_t src = IntRegMap[instr.src];
+	const uint32_t dst = IntRegMap[instr.dst];
+
+	if (src != dst)
+	{
+		// sub dst, dst, src
+		emit32(ARMV8A::SUB | dst | (dst << 5) | (src << 16), code, k);
+	}
+	else
+	{
+		emitAddImmediate(dst, dst, -instr.getImm32(), code, k);
+	}
+
+	codePos = k;
+}
+
 void JitCompilerA64::h_NOP(Instruction& instr, int i, uint32_t& codePos)
 {
 }

src/jit_compiler_a64.hpp

@@ -91,6 +91,7 @@ namespace randomx {
 
 		void h_IADD_RS(Instruction&, int, uint32_t&);
 		void h_IADD_M(Instruction&, int, uint32_t&);
+		void h_ISUB_R(Instruction&, int, uint32_t&);
 		void h_NOP(Instruction&, int, uint32_t&);
 	};
 }