--- /dev/null
+#ifndef __MSP430_HEADERS_MPY32_H
+#define __MSP430_HEADERS_MPY32_H
+
+/* mpy.h
+ *
+ * mspgcc project: MSP430 device headers
+ * Hardware 32-bit multiplier
+ *
+ * (c) 2008 by Sergey A. Borshch <sb-sf@sourceforge.net>
+ * Originally based in MSP430F543x datasheet (slas609)
+ * and MSP430x5xx Family User's Guide (slau208).
+ *
+ * $Id: mpy32.h,v 1.3 2008/12/15 12:48:20 sb-sf Exp $
+ */
+
+/* Switches:
+
+__MSP430_MPY32_BASE__ - base address of MPY32 module
+
+*/
+#if defined(__MSP430_MPY32_BASE__)
+#define MPY_ __MSP430_MPY32_BASE__ + 0x00 /* 16-bit operand 1 - multiply */
+sfrw(MPY, MPY_);
+#define MPYS_ __MSP430_MPY32_BASE__ + 0x02 /* 16-bit operand 1 - signed multiply */
+sfrw(MPYS, MPYS_);
+#define MAC_ __MSP430_MPY32_BASE__ + 0x04 /* 16-bit operand 1 - multiply accumulate */
+sfrw(MAC, MAC_);
+#define MACS_ __MSP430_MPY32_BASE__ + 0x06 /* 16-bit operand 1 - signed multiply accumulate */
+sfrw(MACS, MACS_);
+#define OP2_ __MSP430_MPY32_BASE__ + 0x08 /* 16-bit operand 2 */
+sfrw(OP2, OP2_);
+#define RESLO_ __MSP430_MPY32_BASE__ + 0x0A /* 16x16 result low word */
+sfrw(RESLO, RESLO_);
+#define RESHI_ __MSP430_MPY32_BASE__ + 0x0C /* 16x16 result high word */
+sfrw(RESHI, RESHI_);
+#define SUMEXT_ __MSP430_MPY32_BASE__ + 0x0E /* 16x16 sum extension */
+sfrw(SUMEXT, SUMEXT_);
+#define MPY32L_ __MSP430_MPY32_BASE__ + 0x10 /* 32-bit operand 1 - multiply low word */
+sfrw(MPY32L, MPY32L_);
+#define MPY32H_ __MSP430_MPY32_BASE__ + 0x12 /* 32-bit operand 1 - multiply high word */
+sfrw(MPY32H, MPY32H_);
+#define MPYS32L_ __MSP430_MPY32_BASE__ + 0x14 /* 32-bit operand 1 - signed multiply low word */
+sfrw(MPYS32L, MPYS32L_);
+#define MPYS32H_ __MSP430_MPY32_BASE__ + 0x16 /* 32-bit operand 1 - signed multiply high word */
+sfrw(MPYS32H, MPYS32H_);
+#define MAC32L_ __MSP430_MPY32_BASE__ + 0x18 /* 32-bit operand 1 - multiply accumulate low word */
+sfrw(MAC32L, MAC32L_);
+#define MAC32H_ __MSP430_MPY32_BASE__ + 0x1A /* 32-bit operand 1 - multiply accumulate high word */
+sfrw(MAC32H, MAC32H_);
+#define MACS32L_ __MSP430_MPY32_BASE__ + 0x1C /* 32-bit operand 1 - signed multiply accumulate low word */
+sfrw(MACS32L, MACS32L_);
+#define MACS32H_ __MSP430_MPY32_BASE__ + 0x1E /* 32-bit operand 1 - signed multiply accumulate high word */
+sfrw(MACS32H, MACS32H_);
+#define OP2L_ __MSP430_MPY32_BASE__ + 0x20 /* 32-bit operand 2 - low word */
+sfrw(OP2L, OP2L_);
+#define OP2H_ __MSP430_MPY32_BASE__ + 0x22 /* 32-bit operand 2 - high word */
+sfrw(OP2H, OP2H_);
+#define RES0_ __MSP430_MPY32_BASE__ + 0x24 /* 32x32 result 3 - least significant word */
+sfrw(RES0,RES0_);
+#define RES1_ __MSP430_MPY32_BASE__ + 0x26
+sfrw(RES1,RES1_);
+#define RES2_ __MSP430_MPY32_BASE__ + 0x28
+sfrw(RES2,RES2_);
+#define RES3_ __MSP430_MPY32_BASE__ + 0x2A /* 32x32 result 3 - most significant word */
+sfrw(RES3,RES3_);
+#define MPY32CTL0_ __MSP430_MPY32_BASE__ + 0x2C /* MPY32 control register 0 */
+sfrw(MPY32CTL0,MPY32CTL0_);
+#endif /* defined(__MSP430_MPY32_BASE__) */
+
+#define MPYDLY32 (1<<9) /* Delayed write mode */
+#define MPYDLYWRTEN (1<<8) /* Delayed write enable */
+#define MPYPO2_32 (1<<7) /* Multiplier bit width of operand 2 */
+#define MPYPO1_32 (1<<6) /* Multiplier bit width of operand 1 */
+#define MPYM1 (1<<5) /* Multiplier mode */
+#define MPYM0 (1<<4) /* -- // -- */
+#define MPYSAT (1<<3) /* Saturation mode */
+#define MPYFRAC (1<<2) /* Fractional mode */
+#define MPYC (1<<0) /* Carry of the multiplier */
+
+#define MPYM_0 (0<<4) /* Multiply */
+#define MPYM_1 (1<<4) /* Signed multiply */
+#define MPYM_2 (2<<4) /* Multiply accumulate */
+#define MPYM_3 (3<<4) /* Signed multiply accumulate */
+
+
+#ifndef __ASSEMBLER__
+/* Structured declaration */
+
+#undef __xstr
+#undef __str
+#define __xstr(x) __str(x)
+#define __str(x) #x
+
+typedef struct
+{
+ volatile unsigned int MPY; /* 16-bit operand 1 - multiply */
+ volatile unsigned int MPYS; /* 16-bit operand 1 - signed multiply */
+ volatile unsigned int MAC; /* 16-bit operand 1 - multiply accumulate */
+ volatile unsigned int MACS; /* 16-bit operand 1 - signed multiply accumulate */
+ volatile unsigned int OP2; /* 16-bit operand 2 */
+ volatile unsigned int RESLO; /* 16x16 result low word */
+ volatile unsigned int RESHI; /* 16x16 result high word */
+ volatile unsigned int SUMEXT; /* 16x16 sum extension */
+ volatile unsigned int MPY32L; /* 32-bit operand 1 - multiply low word */
+ volatile unsigned int MPY32H; /* 32-bit operand 1 - multiply high word */
+ volatile unsigned int MPYS32L; /* 32-bit operand 1 - signed multiply low word */
+ volatile unsigned int MPYS32H; /* 32-bit operand 1 - signed multiply high word */
+ volatile unsigned int MAC32L; /* 32-bit operand 1 - multiply accumulate low word */
+ volatile unsigned int MAC32H; /* 32-bit operand 1 - multiply accumulate high word */
+ volatile unsigned int MACS32L; /* 32-bit operand 1 - signed multiply accumulate low word */
+ volatile unsigned int MACS32H; /* 32-bit operand 1 - signed multiply accumulate high word */
+ volatile unsigned int OP2L; /* 32-bit operand 2 - low word */
+ volatile unsigned int OP2H; /* 32-bit operand 2 - high word */
+ volatile unsigned int RES0; /* 32x32 result 3 - least significant word */
+ volatile unsigned int RES1;
+ volatile unsigned int RES2;
+ volatile unsigned int RES3; /* 32x32 result 3 - most significant word */
+ volatile unsigned int MPY32CTL0; /* MPY32 control register 0 */
+} mpy32_t;
+mpy32_t mpy32 asm(__xstr(__MSP430_MPY32_BASE__));
+#undef __str
+#undef __xstr
+#endif /* __ASSEMBLER__ */
+
+#endif /* __MSP430_HEADERS_MPY32_H */
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