diff --git a/Makefile.rule b/Makefile.rule
index 19f3fe3d9..f8632524a 100644
--- a/Makefile.rule
+++ b/Makefile.rule
@@ -114,6 +114,9 @@ NO_AFFINITY = 1
 # Support for IEEE quad precision(it's *real* REAL*16)( under testing)
 # QUAD_PRECISION = 1
 
+# Support for integer matrix and vector (e.g. iaxpy)
+# INTEGER_PRECISION = 1
+
 # Theads are still working for a while after finishing BLAS operation
 # to reduce thread activate/deactivate overhead. You can determine
 # time out to improve performance. This number should be from 4 to 30
diff --git a/Makefile.system b/Makefile.system
index 5c3910989..d9d7c80f6 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -309,6 +309,10 @@ CCOMMON_OPT	+= -DQUAD_PRECISION
 NO_EXPRECISION = 1
 endif
 
+ifdef INTEGER_PRECISION
+CCOMMON_OPT	+= -DINTEGER_PRECISION
+endif
+
 ifneq ($(ARCH), x86)
 ifneq ($(ARCH), x86_64)
 NO_EXPRECISION = 1
diff --git a/Makefile.tail b/Makefile.tail
index 2adede1a5..5d79d74b9 100644
--- a/Makefile.tail
+++ b/Makefile.tail
@@ -4,6 +4,7 @@ QBLASOBJS_P = $(QBLASOBJS:.$(SUFFIX)=.$(PSUFFIX))
 CBLASOBJS_P = $(CBLASOBJS:.$(SUFFIX)=.$(PSUFFIX))
 ZBLASOBJS_P = $(ZBLASOBJS:.$(SUFFIX)=.$(PSUFFIX))
 XBLASOBJS_P = $(XBLASOBJS:.$(SUFFIX)=.$(PSUFFIX))
+IBLASOBJS_P = $(IBLASOBJS:.$(SUFFIX)=.$(PSUFFIX))
 
 COMMONOBJS_P = $(COMMONOBJS:.$(SUFFIX)=.$(PSUFFIX))
 
@@ -22,12 +23,18 @@ BLASOBJS   += $(QBLASOBJS)   $(XBLASOBJS)
 BLASOBJS_P += $(QBLASOBJS_P) $(XBLASOBJS_P)
 endif
 
+ifdef INTEGER_PRECISION
+BLASOBJS   += $(IBLASOBJS)
+BLASOBJS_P += $(IBLASOBJS_P)
+endif
+
 $(SBLASOBJS) $(SBLASOBJS_P) : override CFLAGS += -UDOUBLE  -UCOMPLEX
 $(DBLASOBJS) $(DBLASOBJS_P) : override CFLAGS += -DDOUBLE  -UCOMPLEX
 $(QBLASOBJS) $(QBLASOBJS_P) : override CFLAGS += -DXDOUBLE -UCOMPLEX
 $(CBLASOBJS) $(CBLASOBJS_P) : override CFLAGS += -UDOUBLE  -DCOMPLEX
 $(ZBLASOBJS) $(ZBLASOBJS_P) : override CFLAGS += -DDOUBLE  -DCOMPLEX
 $(XBLASOBJS) $(XBLASOBJS_P) : override CFLAGS += -DXDOUBLE -DCOMPLEX
+$(IBLASOBJS) $(IBLASOBJS_P) : override CFLAGS += -DINTEGER -UCOMPLEX
 
 $(SBLASOBJS_P) : override CFLAGS += -DPROFILE $(COMMON_PROF)
 $(DBLASOBJS_P) : override CFLAGS += -DPROFILE $(COMMON_PROF)
@@ -35,6 +42,7 @@ $(QBLASOBJS_P) : override CFLAGS += -DPROFILE $(COMMON_PROF)
 $(CBLASOBJS_P) : override CFLAGS += -DPROFILE $(COMMON_PROF)
 $(ZBLASOBJS_P) : override CFLAGS += -DPROFILE $(COMMON_PROF)
 $(XBLASOBJS_P) : override CFLAGS += -DPROFILE $(COMMON_PROF)
+$(IBLASOBJS_P) : override CFLAGS += -DPROFILE $(COMMON_PROF)
 
 libs    :: $(BLASOBJS) $(COMMONOBJS)
 	$(AR) $(ARFLAGS) -ru $(TOPDIR)/$(LIBNAME) $^
diff --git a/common.h b/common.h
index 320adadcb..7082e1753 100644
--- a/common.h
+++ b/common.h
@@ -276,6 +276,11 @@ typedef int blasint;
 #define SIZE	8
 #define  BASE_SHIFT 3
 #define ZBASE_SHIFT 4
+#elif defined(INTEGER) //extend for integer matrix
+#define FLOAT	int
+#define SIZE    4
+#define  BASE_SHIFT 2
+#define ZBASE_SHIFT 3
 #else
 #define FLOAT	float
 #define SIZE    4
diff --git a/common_i.h b/common_i.h
new file mode 100644
index 000000000..b818dfb7f
--- /dev/null
+++ b/common_i.h
@@ -0,0 +1,9 @@
+#ifndef COMMON_I_H
+#define COMMON_I_H
+
+#ifndef DYNAMIC_ARCH
+#define	IAXPYU_K		iaxpy_k
+#else
+#error
+#endif
+#endif
diff --git a/common_interface.h b/common_interface.h
index 15f69e02f..4ab1dd39f 100644
--- a/common_interface.h
+++ b/common_interface.h
@@ -93,6 +93,7 @@ openblas_complex_xdouble BLASFUNC(xdotc)  (blasint *, xdouble  *, blasint *, xdo
 
 void    BLASFUNC(saxpy) (blasint *, float  *, float  *, blasint *, float  *, blasint *);
 void    BLASFUNC(daxpy) (blasint *, double *, double *, blasint *, double *, blasint *);
+void    BLASFUNC(iaxpy) (blasint *, int  *, int  *, blasint *, int  *, blasint *);
 void    BLASFUNC(qaxpy) (blasint *, xdouble *, xdouble *, blasint *, xdouble *, blasint *);
 void    BLASFUNC(caxpy) (blasint *, float  *, float  *, blasint *, float  *, blasint *);
 void    BLASFUNC(zaxpy) (blasint *, double *, double *, blasint *, double *, blasint *);
diff --git a/common_level1.h b/common_level1.h
index 2a1b4f1cf..927c8d4ac 100644
--- a/common_level1.h
+++ b/common_level1.h
@@ -60,6 +60,8 @@ int    daxpy_k (BLASLONG, BLASLONG, BLASLONG, double,
 	       double *, BLASLONG, double *, BLASLONG, double *, BLASLONG);
 int    qaxpy_k (BLASLONG, BLASLONG, BLASLONG, xdouble,
 	       xdouble *, BLASLONG, xdouble *, BLASLONG, xdouble *, BLASLONG);
+int    iaxpy_k (BLASLONG, BLASLONG, BLASLONG, int,
+	       int  *, BLASLONG, int  *, BLASLONG, int  *, BLASLONG);
 int    caxpy_k (BLASLONG, BLASLONG, BLASLONG, float,  float,
 	       float  *, BLASLONG, float  *, BLASLONG, float  *, BLASLONG);
 int    zaxpy_k (BLASLONG, BLASLONG, BLASLONG, double, double,
diff --git a/common_macro.h b/common_macro.h
index 8555baa67..cd15bba79 100644
--- a/common_macro.h
+++ b/common_macro.h
@@ -47,6 +47,10 @@
 #include "common_z.h"
 #include "common_x.h"
 
+#ifdef INTEGER_PRECISION
+#include "common_i.h"
+#endif
+
 #ifndef COMPLEX
 #ifdef XDOUBLE
 
@@ -635,6 +639,9 @@
 #define OMATCOPY_K_CT		DOMATCOPY_K_CT
 #define OMATCOPY_K_RT		DOMATCOPY_K_RT
 #define GEADD_K                 DGEADD_K 
+
+#elif defined(INTEGER)
+#define AXPYU_K                 IAXPYU_K
 #else
 
 #define	AMAX_K			SAMAX_K
diff --git a/common_thread.h b/common_thread.h
index bd964445e..81c23e5d7 100644
--- a/common_thread.h
+++ b/common_thread.h
@@ -65,6 +65,7 @@ extern int blas_omp_linked;
 #define BLAS_XDOUBLE	0x0002U
 #define BLAS_REAL	0x0000U
 #define BLAS_COMPLEX	0x0004U
+#define BLAS_INTEGER    0x0008U
 
 #define BLAS_TRANSA	0x0030U	/* 2bit */
 #define BLAS_TRANSA_N	0x0000U
diff --git a/driver/others/blas_server.c b/driver/others/blas_server.c
index b3b1ce7bd..eecfd0ac2 100644
--- a/driver/others/blas_server.c
+++ b/driver/others/blas_server.c
@@ -189,6 +189,20 @@ static void legacy_exec(void *func, int mode, blas_arg_t *args, void *sb){
 		args -> b, args -> ldb,
 		args -> c, args -> ldc, sb);
 	} else
+#endif
+#ifdef INTEGER_PRECISION
+	if (mode & BLAS_INTEGER){
+	  /* REAL / Extended Double */
+	  void (*afunc)(BLASLONG, BLASLONG, BLASLONG, int,
+			int *, BLASLONG, int *, BLASLONG,
+			int *, BLASLONG, void *) = func;
+
+	  afunc(args -> m, args -> n, args -> k,
+		((int *)args -> alpha)[0],
+		args -> a, args -> lda,
+		args -> b, args -> ldb,
+		args -> c, args -> ldc, sb);
+	} else
 #endif
 	  if (mode & BLAS_DOUBLE){
 	    /* REAL / Double */
diff --git a/interface/Makefile b/interface/Makefile
index 1666d9145..1075b013f 100644
--- a/interface/Makefile
+++ b/interface/Makefile
@@ -253,6 +253,15 @@ XBLAS3OBJS   +=  xgemm3m.$(SUFFIX) xsymm3m.$(SUFFIX) xhemm3m.$(SUFFIX)
 endif
 endif
 
+ifdef INTEGER_PRECISION
+
+IBLAS1OBJS = \
+	     iaxpy.$(SUFFIX)
+
+IBLAS2OBJS = 
+IBLAS3OBJS = 
+endif
+
 endif
 
 HPLOBJS = dgemm.$(SUFFIX) dtrsm.$(SUFFIX) \
@@ -343,6 +352,9 @@ CZBLAS3OBJS   = \
 	cblas_zomatcopy.$(SUFFIX) cblas_zimatcopy.$(SUFFIX) \
 	cblas_zgeadd.$(SUFFIX)
 
+CIBLAS1OBJS = \
+	cblas_iaxpy.$(SUFFIX)
+
 
 ifeq ($(SUPPORT_GEMM3M), 1)
 
@@ -372,6 +384,10 @@ ZBLAS1OBJS   += $(CZBLAS1OBJS)
 ZBLAS2OBJS   += $(CZBLAS2OBJS)
 ZBLAS3OBJS   += $(CZBLAS3OBJS)
 
+IBLAS1OBJS   += $(CIBLAS1OBJS)
+IBLAS2OBJS   += $(CIBLAS2OBJS)
+IBLAS3OBJS   += $(CIBLAS3OBJS)
+
 endif
 
 SBLASOBJS    = $(SBLAS1OBJS) $(SBLAS2OBJS) $(SBLAS3OBJS)
@@ -380,6 +396,7 @@ QBLASOBJS    = $(QBLAS1OBJS) $(QBLAS2OBJS) $(QBLAS3OBJS)
 CBLASOBJS    = $(CBLAS1OBJS) $(CBLAS2OBJS) $(CBLAS3OBJS)
 ZBLASOBJS    = $(ZBLAS1OBJS) $(ZBLAS2OBJS) $(ZBLAS3OBJS)
 XBLASOBJS    = $(XBLAS1OBJS) $(XBLAS2OBJS) $(XBLAS3OBJS)
+IBLASOBJS    = $(IBLAS1OBJS) $(IBLAS2OBJS) $(IBLAS3OBJS)
 
 #SLAPACKOBJS	= \
 #	sgetrf.$(SUFFIX) sgetrs.$(SUFFIX) spotrf.$(SUFFIX) sgetf2.$(SUFFIX) \
@@ -458,6 +475,10 @@ ifdef QUAD_PRECISION
 FUNCOBJS   += $(QBLASOBJS) $(XBLASOBJS)
 endif
 
+ifdef INTEGER_PRECISION
+FUNCOBJS   += $(IBLASOBJS)
+endif
+
 FUNCALLFILES = $(FUNCOBJS:.$(SUFFIX)=)
 
 include $(TOPDIR)/Makefile.tail
@@ -476,17 +497,18 @@ endif
 clean ::
 	@rm -f functable.h
 
-level1 : $(SBLAS1OBJS) $(DBLAS1OBJS) $(QBLAS1OBJS) $(CBLAS1OBJS) $(ZBLAS1OBJS) $(XBLAS1OBJS)
+level1 : $(SBLAS1OBJS) $(DBLAS1OBJS) $(QBLAS1OBJS) $(CBLAS1OBJS) $(ZBLAS1OBJS) $(XBLAS1OBJS) $(IBLAS1OBJS)
 	$(AR) $(ARFLAGS) -ru $(TOPDIR)/$(LIBNAME) $^
 
-level2 : $(SBLAS2OBJS) $(DBLAS2OBJS) $(QBLAS2OBJS) $(CBLAS2OBJS) $(ZBLAS2OBJS) $(XBLAS2OBJS)
+level2 : $(SBLAS2OBJS) $(DBLAS2OBJS) $(QBLAS2OBJS) $(CBLAS2OBJS) $(ZBLAS2OBJS) $(XBLAS2OBJS) $(IBLAS2OBJS)
 	$(AR) $(ARFLAGS) -ru $(TOPDIR)/$(LIBNAME) $^
 
-level3 : $(SBLAS3OBJS) $(DBLAS3OBJS) $(QBLAS3OBJS) $(CBLAS3OBJS) $(ZBLAS3OBJS) $(XBLAS3OBJS)
+level3 : $(SBLAS3OBJS) $(DBLAS3OBJS) $(QBLAS3OBJS) $(CBLAS3OBJS) $(ZBLAS3OBJS) $(XBLAS3OBJS) $(IBLAS3OBJS)
 	$(AR) $(ARFLAGS) -ru $(TOPDIR)/$(LIBNAME) $^
 
 $(CSBLASOBJS) $(CSBLASOBJS_P) $(CDBLASOBJS) $(CDBLASOBJS_P) $(CQBLASOBJS) $(CQBLASOBJS_P) \
-$(CCBLASOBJS) $(CCBLASOBJS_P) $(CZBLASOBJS) $(CZBLASOBJS_P) $(CXBLASOBJS) $(CXBLASOBJS_P) : override CFLAGS += -DCBLAS
+$(CCBLASOBJS) $(CCBLASOBJS_P) $(CZBLASOBJS) $(CZBLASOBJS_P) $(CXBLASOBJS) $(CXBLASOBJS_P) \
+$(CIBLASOBJS) $(CIBLASOBJS_P) : override CFLAGS += -DCBLAS
 
 srot.$(SUFFIX) srot.$(PSUFFIX) : rot.c
 	$(CC) $(CFLAGS) -c $< -o $(@F)
@@ -725,6 +747,9 @@ saxpy.$(SUFFIX) saxpy.$(PSUFFIX) : axpy.c
 daxpy.$(SUFFIX) daxpy.$(PSUFFIX) : axpy.c
 	$(CC) $(CFLAGS) -c $< -o $(@F)
 
+iaxpy.$(SUFFIX) iaxpy.$(PSUFFIX) : axpy.c
+	$(CC) $(CFLAGS) -c $< -o $(@F)
+
 qaxpy.$(SUFFIX) qaxpy.$(PSUFFIX) : axpy.c
 	$(CC) $(CFLAGS) -c $< -o $(@F)
 
@@ -1437,6 +1462,9 @@ cblas_saxpy.$(SUFFIX) cblas_saxpy.$(PSUFFIX) : axpy.c
 cblas_daxpy.$(SUFFIX) cblas_daxpy.$(PSUFFIX) : axpy.c
 	$(CC) $(CFLAGS) -DCBLAS -c $< -o $(@F)
 
+cblas_iaxpy.$(SUFFIX) cblas_iaxpy.$(PSUFFIX) : axpy.c
+	$(CC) $(CFLAGS) -DCBLAS -c $< -o $(@F)
+
 cblas_caxpy.$(SUFFIX) cblas_caxpy.$(PSUFFIX) : zaxpy.c
 	$(CC) $(CFLAGS) -DCBLAS -c $< -o $(@F)
 
diff --git a/interface/axpy.c b/interface/axpy.c
index 61b7b4d78..d391f9f56 100644
--- a/interface/axpy.c
+++ b/interface/axpy.c
@@ -103,6 +103,8 @@ void CNAME(blasint n, FLOAT alpha, FLOAT *x, blasint incx, FLOAT *y, blasint inc
     mode  =  BLAS_XDOUBLE | BLAS_REAL;
 #elif defined(DOUBLE)
     mode  =  BLAS_DOUBLE  | BLAS_REAL;
+#elif defined(INTEGER)
+    mode  =  BLAS_INTEGER | BLAS_REAL;
 #else
     mode  =  BLAS_SINGLE  | BLAS_REAL;
 #endif
diff --git a/kernel/Makefile.L1 b/kernel/Makefile.L1
index 7c7cb2770..dcc9d0d32 100644
--- a/kernel/Makefile.L1
+++ b/kernel/Makefile.L1
@@ -210,6 +210,10 @@ ifndef XAXPYKERNEL
 XAXPYKERNEL = zaxpy.S
 endif
 
+ifndef IAXPYKERNEL
+IAXPYKERNEL = ../generic/iaxpy.c
+endif
+
 ### COPY ###
 
 ifndef SCOPYKERNEL
@@ -471,6 +475,9 @@ QBLASOBJS	+= \
 	qasum_k$(TSUFFIX).$(SUFFIX) qaxpy_k$(TSUFFIX).$(SUFFIX) qcopy_k$(TSUFFIX).$(SUFFIX) qdot_k$(TSUFFIX).$(SUFFIX) \
 	qnrm2_k$(TSUFFIX).$(SUFFIX) qrot_k$(TSUFFIX).$(SUFFIX) qscal_k$(TSUFFIX).$(SUFFIX) qswap_k$(TSUFFIX).$(SUFFIX)
 
+IBLASOBJS       += \
+	iaxpy_k$(TSUFFIX).$(SUFFIX)
+
 CBLASOBJS	+= \
 	camax_k$(TSUFFIX).$(SUFFIX)  camin_k$(TSUFFIX).$(SUFFIX) icamax_k$(TSUFFIX).$(SUFFIX) icamin_k$(TSUFFIX).$(SUFFIX) \
 	casum_k$(TSUFFIX).$(SUFFIX) caxpy_k$(TSUFFIX).$(SUFFIX) caxpyc_k$(TSUFFIX).$(SUFFIX) ccopy_k$(TSUFFIX).$(SUFFIX) \
@@ -645,6 +652,9 @@ $(KDIR)daxpy_k$(TSUFFIX).$(SUFFIX)  $(KDIR)daxpy_k$(TPSUFFIX).$(PSUFFIX)  : $(KE
 $(KDIR)qaxpy_k$(TSUFFIX).$(SUFFIX)  $(KDIR)qaxpy_k$(TPSUFFIX).$(PSUFFIX)  : $(KERNELDIR)/$(QAXPYKERNEL)
 	$(CC) -c $(CFLAGS) -UCOMPLEX -UCOMPLEX -DXDOUBLE $< -o $@
 
+$(KDIR)iaxpy_k$(TSUFFIX).$(SUFFIX)  $(KDIR)iaxpy_k$(TPSUFFIX).$(PSUFFIX)  : $(KERNELDIR)/$(IAXPYKERNEL)
+	$(CC) -c $(CFLAGS) -UCOMPLEX -UCOMPLEX -DINTEGER $< -o $@
+
 $(KDIR)caxpy_k$(TSUFFIX).$(SUFFIX)  $(KDIR)caxpy_k$(TPSUFFIX).$(PSUFFIX)  : $(KERNELDIR)/$(CAXPYKERNEL)
 	$(CC) -c $(CFLAGS) -DCOMPLEX -DCOMPLEX -UCONJ -UDOUBLE $< -o $@
 
diff --git a/kernel/generic/iaxpy.c b/kernel/generic/iaxpy.c
new file mode 100644
index 000000000..9bb7cf164
--- /dev/null
+++ b/kernel/generic/iaxpy.c
@@ -0,0 +1,52 @@
+/***************************************************************************
+Copyright (c) 2015, The OpenBLAS Project
+All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+1. Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in
+the documentation and/or other materials provided with the
+distribution.
+3. Neither the name of the OpenBLAS project nor the names of
+its contributors may be used to endorse or promote products
+derived from this software without specific prior written permission.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*****************************************************************************/
+
+#include "common.h"
+
+int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, int da, int *x, BLASLONG inc_x, int *y, BLASLONG inc_y, int *dummy, BLASLONG dummy2)
+{
+  BLASLONG i=0;
+  BLASLONG ix,iy;
+
+  if ( n < 0     )  return(0);
+  if ( da == 0 ) return(0);
+
+  ix = 0;
+  iy = 0;
+
+  while(i < n)
+    {
+
+      y[iy] += da * x[ix] ;
+      ix += inc_x ;
+      iy += inc_y ;
+      i++ ;
+
+    }
+
+  return 0;
+}