kernel: integrate Zuikkis' kernel, selectable with `--kernel=zuikkis`.

Kernel ckolivas is still the default. Needs documentation, too.

https://github.com/veox/sgminer/issues/4

configure.ac

@@ -318,6 +318,7 @@ fi
 AC_DEFINE_UNQUOTED([SGMINER_PREFIX], ["$prefix/bin"], [Path to sgminer install])
 
 AC_DEFINE_UNQUOTED([CKOLIVAS_KERNNAME], ["ckolivas"], [Filename for original scrypt kernel])
+AC_DEFINE_UNQUOTED([ZUIKKIS_KERNNAME], ["zuikkis"], [Filename for Zuikkis' optimised kernel])
 
 
 AC_SUBST(OPENCL_LIBS)

driver-opencl.c

@@ -198,6 +198,8 @@ static enum cl_kernels select_kernel(char *arg)
 {
 	if (!strcmp(arg, "ckolivas"))
 		return KL_CKOLIVAS;
+	if (!strcmp(arg, "zuikkis"))
+		return KL_ZUIKKIS;
 
 	return KL_NONE;
 }
@@ -1211,7 +1213,10 @@ static bool opencl_thread_prepare(struct thr_info *thr)
 	{
 		switch (clStates[i]->chosen_kernel) {
 			case KL_CKOLIVAS:
-				cgpu->kname = "scrypt";
+				cgpu->kname = "ckolivas";
+				break;
+			case KL_ZUIKKIS:
+				cgpu->kname = "zuikkis";
 				break;
 			default:
 				break;
@@ -1244,6 +1249,9 @@ static bool opencl_thread_init(struct thr_info *thr)
 		case KL_CKOLIVAS:
 			thrdata->queue_kernel_parameters = &queue_scrypt_kernel;
 			break;
+		case KL_ZUIKKIS:
+			thrdata->queue_kernel_parameters = &queue_scrypt_kernel;
+			break;
 		default:
 			break;
 	}

miner.h

@@ -373,6 +373,7 @@ enum dev_enable {
 enum cl_kernels {
 	KL_NONE,
 	KL_CKOLIVAS,
+	KL_ZUIKKIS,
 };
 
 enum dev_reason {

ocl.c

@@ -422,6 +422,12 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize)
 			/* Scrypt only supports vector 1 */
 			cgpu->vwidth = 1;
 			break;
+		case KL_ZUIKKIS:
+			strcpy(filename, ZUIKKIS_KERNNAME".cl");
+			strcpy(binaryfilename, ZUIKKIS_KERNNAME);
+			/* Scrypt only supports vector 1 */
+			cgpu->vwidth = 1;
+			break;
 		case KL_NONE: /* Shouldn't happen */
 			break;
 	}

sgminer.c

@@ -4124,6 +4124,9 @@ void write_config(FILE *fcfg)
 				case KL_CKOLIVAS:
 					fprintf(fcfg, "ckolivas");
 					break;
+				case KL_ZUIKKIS:
+					fprintf(fcfg, "zuikkis");
+					break;
 			}
 		}
 		fputs("\",\n\"lookup-gap\" : \"", fcfg);