loongarch: add lasx simd opt

test/CMakeLists.txt

@@ -2,7 +2,11 @@ function(add_kissfft_test_executable NAME)
     add_kissfft_executable(${NAME} ${ARGN})
     target_include_directories(${NAME} PRIVATE ..)
 
-    if(COMPILER_SUPPORT_LSX_FLAG)
+    if(HAVE_LASX)
+        target_compile_options(${NAME} PRIVATE -mlasx)
+    endif()
+
+    if(HAVE_LSX)
         target_compile_options(${NAME} PRIVATE -mlsx)
     endif()
 
@@ -50,7 +54,9 @@ add_kissfft_test_executable(testcpp testcpp.cc)
 if(KISSFFT_DATATYPE MATCHES "^simd$")
     add_kissfft_test_executable(tsimd test_simd.c)
     target_compile_definitions(tsimd PRIVATE USE_SIMD)
-    if(COMPILER_SUPPORT_LSX_FLAG)
+    if(HAVE_LASX)
+        target_compile_options(kissfft PRIVATE -mlasx)
+    elseif(HAVE_LSX)
         target_compile_options(kissfft PRIVATE -mlsx)
     elseif(NOT MSVC)
         target_compile_options(kissfft PRIVATE -msse)

test/Makefile

@@ -143,7 +143,9 @@ endif
 
 $(TESTSIMD): test_simd.c
 ifeq "$(KISSFFT_DATATYPE)" "simd"
-ifeq "$(HAVE_LSX)" "lsx"
+ifeq "$(HAVE_LASX)" "lasx"
+	$(CC) -o $@ -g $(CFLAGS) -DUSE_SIMD=1 -DHAVE_LASX=1 -mlasx $< -L.. -l$(KISSFFTLIB_SHORTNAME) -lm
+else ifeq "$(HAVE_LSX)" "lsx"
 	$(CC) -o $@ -g $(CFLAGS) -DUSE_SIMD=1 -DHAVE_LSX=1 -mlsx $< -L.. -l$(KISSFFTLIB_SHORTNAME) -lm
 else
 	$(CC) -o $@ -g $(CFLAGS) -DUSE_SIMD=1 -msse $< -L.. -l$(KISSFFTLIB_SHORTNAME) -lm

test/benchkiss.c

@@ -70,8 +70,13 @@ int main(int argc,char ** argv)
         nbytes *= nfft[k];
 
 #ifdef USE_SIMD        
+#ifdef HAVE_LASX
+    numffts /= 8;
+    fprintf(stderr,"since SIMD implementation does 8 ffts at a time, numffts is being reduced to %d\n",numffts);
+#else
     numffts /= 4;
     fprintf(stderr,"since SIMD implementation does 4 ffts at a time, numffts is being reduced to %d\n",numffts);
+#endif
 #endif
 
     buf=(kiss_fft_cpx*)KISS_FFT_MALLOC(nbytes);

test/test_real.c

@@ -22,7 +22,10 @@ static
 kiss_fft_scalar rand_scalar(void) 
 {
 #ifdef USE_SIMD
-#ifdef HAVE_LSX
+#ifdef HAVE_LASX
+    float tmp = rand()-RAND_MAX/2;
+    return (__m256)(__lasx_xvldrepl_w(&tmp, 0));
+#elif defined(HAVE_LSX)
     float tmp = rand()-RAND_MAX/2;
     return (__m128)(__lsx_vldrepl_w(&tmp, 0));
 #else

test/test_simd.c

@@ -6,7 +6,7 @@ static void test1(void)
     int n[2] = {256,256};
     size_t nbytes = sizeof(kiss_fft_cpx)*n[0]*n[1];
 
-#ifdef HAVE_LSX
+#if defined(HAVE_LSX) || defined(HAVE_LASX)
     kiss_fft_cpx * inbuf = NULL;
     kiss_fft_cpx * outbuf = NULL;
     if (posix_memalign((void**)&inbuf, 16, nbytes) ||
@@ -23,7 +23,7 @@ static void test1(void)
     kiss_fftnd(cfg,inbuf,outbuf);
     kiss_fft_free(cfg);
 
-#ifdef HAVE_LSX
+#if defined(HAVE_LSX) || defined(HAVE_LASX)
     free(inbuf);
     free(outbuf);
 #else

test/twotonetest.c

@@ -38,10 +38,12 @@ double two_tone_test( int nfft, int bin1,int bin2)
     /* generate a signal with two tones*/
     for (i = 0; i < nfft; i++) {
 #ifdef USE_SIMD
-#ifdef HAVE_LSX
+#ifdef HAVE_LASX
+        float tmp = (maxrange>>1)*cos(f1*i) + (maxrange>>1)*cos(f2*i);
+        tbuf[i] = (__m256)__lasx_xvldrepl_w(&tmp, 0);
+#elif defined(HAVE_LSX)
         float tmp = (maxrange>>1)*cos(f1*i) + (maxrange>>1)*cos(f2*i);
         tbuf[i] = (__m128)__lsx_vldrepl_w(&tmp, 0);
-
 #else
         tbuf[i] = _mm_set1_ps( (maxrange>>1)*cos(f1*i)
                              + (maxrange>>1)*cos(f2*i) );