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1 files changed, 395 insertions, 0 deletions

diff --git a/llama.cpp/ggml/src/ggml-hexagon/htp/softmax-ops.c b/llama.cpp/ggml/src/ggml-hexagon/htp/softmax-ops.c
new file mode 100644
index 0000000..e91a16d
--- /dev/null
+++ b/llama.cpp/ggml/src/ggml-hexagon/htp/softmax-ops.c
@@ -0,0 +1,395 @@
+#pragma clang diagnostic ignored "-Wunused-variable"
+#pragma clang diagnostic ignored "-Wunused-function"
+#pragma clang diagnostic ignored "-Wunused-but-set-variable"
+
+#include <HAP_farf.h>
+#include <HAP_perf.h>
+
+#include <math.h>
+#include <string.h>
+
+#include "hex-dma.h"
+#include "hvx-utils.h"
+
+#define GGML_COMMON_DECL_C
+#include "ggml-common.h"
+#include "htp-ctx.h"
+#include "htp-msg.h"
+#include "htp-ops.h"
+
+#define htp_softmax_preamble3                              \
+    const uint32_t ne00 = src0->ne[0];                     \
+    const uint32_t ne01 = src0->ne[1];                     \
+    const uint32_t ne02 = src0->ne[2];                     \
+    const uint32_t ne03 = src0->ne[3];                     \
+                                                           \
+    const uint32_t nb00 = src0->nb[0];                     \
+    const uint32_t nb01 = src0->nb[1];                     \
+    const uint32_t nb02 = src0->nb[2];                     \
+    const uint32_t nb03 = src0->nb[3];                     \
+                                                           \
+    const uint32_t ne10 = (src1->ne[0]) ? src1->ne[0] : 1; \
+    const uint32_t ne11 = (src1->ne[0]) ? src1->ne[1] : 1; \
+    const uint32_t ne12 = (src1->ne[0]) ? src1->ne[2] : 1; \
+    const uint32_t ne13 = (src1->ne[0]) ? src1->ne[3] : 1; \
+                                                           \
+    const uint32_t nb10 = (src1->ne[0]) ? src1->nb[0] : 1; \
+    const uint32_t nb11 = (src1->ne[0]) ? src1->nb[1] : 1; \
+    const uint32_t nb12 = (src1->ne[0]) ? src1->nb[2] : 1; \
+    const uint32_t nb13 = (src1->ne[0]) ? src1->nb[3] : 1; \
+                                                           \
+    const uint32_t ne0 = dst->ne[0];                       \
+    const uint32_t ne1 = dst->ne[1];                       \
+    const uint32_t ne2 = dst->ne[2];                       \
+    const uint32_t ne3 = dst->ne[3];                       \
+                                                           \
+    const uint32_t nb0 = dst->nb[0];                       \
+    const uint32_t nb1 = dst->nb[1];                       \
+    const uint32_t nb2 = dst->nb[2];                       \
+    const uint32_t nb3 = dst->nb[3];
+
+struct softmax_th_ctx {
+    bool     use_f16;
+    bool     use_src1;
+    uint32_t n_head;
+    uint32_t n_head_log2;
+
+    float scale;
+    float max_bias;
+    float m0;
+    float m1;
+
+    struct htp_ops_context * octx;
+};
+
+static void init_softmax_ctx(struct softmax_th_ctx * softmax_ctx, struct htp_ops_context * octx) {
+    const struct htp_tensor * src0 = &octx->src0;
+    const struct htp_tensor * src1 = &octx->src1;
+
+    memset(softmax_ctx, 0, sizeof(struct softmax_th_ctx));
+
+    memcpy(&softmax_ctx->scale, (float *) octx->op_params, sizeof(float));
+    memcpy(&softmax_ctx->max_bias, (float *) octx->op_params + 1, sizeof(float));
+
+    softmax_ctx->n_head      = src0->ne[2];
+    softmax_ctx->n_head_log2 = 1u << (uint32_t) floor(log2(softmax_ctx->n_head));
+
+    softmax_ctx->m0 = powf(2.0f, -(softmax_ctx->max_bias) / softmax_ctx->n_head_log2);
+    softmax_ctx->m1 = powf(2.0f, -(softmax_ctx->max_bias / 2.0f) / softmax_ctx->n_head_log2);
+
+    softmax_ctx->use_src1 = (src1->ne[0] != 0);
+    softmax_ctx->use_f16  = (src1->ne[0] != 0) && (src1->type == HTP_TYPE_F16);
+
+    softmax_ctx->octx = octx;
+}
+
+static void hvx_fast_softmax_prep_f32(const uint8_t * restrict src,
+                                      uint8_t * restrict dst,
+                                      const int num_elems,
+                                      float     scale,
+                                      const uint8_t * restrict mask,
+                                      float slope) {
+    const uint8_t * restrict src_curr  = src;
+    uint8_t * restrict dst_curr        = dst;
+    const uint8_t * restrict mask_curr = mask;
+
+    HVX_Vector scale_vec = hvx_vec_splat_f32(scale);
+    HVX_Vector slope_vec = hvx_vec_splat_f32(slope);
+
+    int step_of_1 = num_elems >> 5;
+
+    #pragma unroll(4)
+    for (int i = 0; i < step_of_1; i++) {
+        HVX_Vector v1 = *(HVX_Vector *) src_curr;
+
+        HVX_Vector v3 = *(HVX_Vector *) mask_curr;
+
+        HVX_Vector v2 = Q6_Vqf32_vmpy_VsfVsf(v1, scale_vec);
+
+        HVX_Vector v4 = Q6_Vqf32_vmpy_VsfVsf(v3, slope_vec);
+
+        HVX_Vector v5 = Q6_Vqf32_vadd_Vqf32Vqf32(v2, v4);
+
+        *(HVX_Vector *) dst_curr = Q6_Vsf_equals_Vqf32(v5);
+
+        src_curr += VLEN;
+        dst_curr += VLEN;
+        mask_curr += VLEN;
+    }
+}
+
+static void hvx_fast_softmax_f32(const uint8_t * restrict src,
+                                 uint8_t * restrict dst,
+                                 uint8_t * restrict pad,
+                                 const int num_elems) {
+    const HVX_Vector * restrict v_src = (HVX_Vector *) src;
+    HVX_Vector * restrict v_pad       = (HVX_Vector *) pad;
+    HVX_Vector * restrict v_dst       = (HVX_Vector *) dst;
+
+    HVX_Vector sum_vec = Q6_V_vsplat_R(0x00000000);
+    HVX_Vector max_vec = hvx_vec_splat_f32(((const float *) src)[0]);
+    HVX_Vector zero_v  = Q6_V_vzero();
+    HVX_Vector one_v   = hvx_vec_splat_f32(1.0);
+
+    int step_of_1 = num_elems >> 5;
+
+    #pragma unroll(4)
+    for (int i = 0; i < step_of_1; i++) {
+        HVX_Vector v1 = v_src[i];
+        max_vec       = Q6_Vsf_vmax_VsfVsf(max_vec, v1);
+    }
+
+    HVX_Vector v = hvx_vec_reduce_max_f32(max_vec);
+    max_vec      = hvx_vec_repl4(v);
+
+    #pragma unroll(4)
+    for (int i = 0; i < step_of_1; i++) {
+        HVX_Vector v1 = v_src[i];
+        HVX_Vector v2 = Q6_Vqf32_vsub_VsfVsf(v1, max_vec);
+
+        HVX_Vector v3 = hvx_vec_exp_f32(Q6_Vsf_equals_Vqf32(v2));
+
+        sum_vec = Q6_Vqf32_vadd_VsfVsf(Q6_Vsf_equals_Vqf32(sum_vec), v3);
+
+        v_pad[i] = v3;
+    }
+
+    v       = hvx_vec_reduce_sum_f32(Q6_Vsf_equals_Vqf32(sum_vec));
+    sum_vec = hvx_vec_repl4(v);
+
+    HVX_VectorPred pos_sum   = Q6_Q_vcmp_gt_VwVw(sum_vec, zero_v);
+    HVX_Vector     v4        = hvx_vec_inverse_f32(sum_vec);
+    HVX_Vector     scale_vec = Q6_V_vmux_QVV(pos_sum, v4, one_v);
+
+    #pragma unroll(4)
+    for (int i = 0; i < step_of_1; i++) {
+        HVX_Vector v1 = v_pad[i];
+        HVX_Vector v2 = Q6_Vqf32_vmpy_VsfVsf(v1, scale_vec);
+        v_dst[i]      = Q6_Vsf_equals_Vqf32(v2);
+    }
+}
+
+static float hvx_softmax_f32(const uint8_t * restrict src,
+                             uint8_t * restrict dst,
+                             uint8_t * restrict spad,
+                             const int   num_elems,
+                             const float max) {
+    hvx_sub_scalar_f32(spad, src, max, num_elems);
+
+    hvx_exp_f32(spad, dst, num_elems, false);
+
+    float sum = hvx_reduce_sum_f32(dst, num_elems);
+
+    return sum;
+}
+
+static void softmax_htp_f32(int nth, int ith, struct softmax_th_ctx * softmax_ctx, int opt_path) {
+    struct htp_ops_context * octx = softmax_ctx->octx;
+
+    const struct htp_tensor * src0 = &octx->src0;
+    const struct htp_tensor * src1 = &octx->src1;
+    const struct htp_tensor * dst  = &octx->dst;
+
+    htp_softmax_preamble3;
+
+    uint8_t * src0_spad_data = octx->src0_spad.data + (ith * nb01);
+    uint8_t * src1_spad_data = octx->src1_spad.data + (ith * nb01);
+    uint8_t * dst_spad_data  = octx->dst_spad.data + (ith * nb1);
+
+    float * wp0 = (float *) src0_spad_data;
+    float * wp1 = (float *) src1_spad_data;
+    float * wp2 = (float *) dst_spad_data;
+
+    for (uint32_t i03 = 0; i03 < ne03; i03++) {
+        for (uint32_t i02 = 0; i02 < ne02; i02++) {
+            for (uint32_t i01 = ith; i01 < ne01; i01 += nth) {
+                const uint32_t i11 = i01;
+                const uint32_t i12 = i02 % ne12;
+                const uint32_t i13 = i03 % ne13;
+
+                // ALiBi
+                const uint32_t h = i02;  // head
+
+                const float slope = (softmax_ctx->max_bias > 0.0f) ?
+                                        h < softmax_ctx->n_head_log2 ?
+                                        powf(softmax_ctx->m0, h + 1) :
+                                        powf(softmax_ctx->m1, 2 * (h - softmax_ctx->n_head_log2) + 1) :
+                                        1.0f;
+
+                float * sp = (float *) ((char *) octx->src0.data + i01 * nb01 + i02 * nb02 + i03 * nb03);
+                float * dp = (float *) ((char *) octx->dst.data + i01 * nb1 + i02 * nb2 + i03 * nb3);
+
+                // broadcast the mask across rows
+                __fp16 * mp_f16 = (softmax_ctx->use_src1) ?
+                                      (__fp16 *) ((char *) octx->src1.data + i11 * nb11 + i12 * nb12 + i13 * nb13) :
+                                      NULL;
+                float *  mp_f32 = (softmax_ctx->use_src1) ?
+                                      (float *) ((char *) octx->src1.data + i11 * nb11 + i12 * nb12 + i13 * nb13) :
+                                      NULL;
+
+                if ((1 == opt_path) && (mp_f32) && !(softmax_ctx->use_f16)) {
+                    hvx_fast_softmax_prep_f32((const uint8_t *) sp, (uint8_t *) wp0, ne00, softmax_ctx->scale,
+                                              (const uint8_t *) mp_f32, slope);
+                } else {
+                    hvx_scale_f32((uint8_t *) wp0, (const uint8_t *) sp, ne00, softmax_ctx->scale);
+                    if (mp_f32) {
+                        if (softmax_ctx->use_f16) {
+                            for (int i = 0; i < ne00; ++i) {
+                                wp0[i] += slope * (float) mp_f16[i];
+                            }
+                        } else {
+                            for (int i = 0; i < ne00; ++i) {
+                                wp0[i] += slope * mp_f32[i];
+                            }
+                        }
+                    }
+                }
+
+                if (1 == opt_path) {
+                    hvx_fast_softmax_f32((const uint8_t *) wp0, (uint8_t *) dp, (uint8_t *) wp1, ne00);
+                } else {
+                    float max = hvx_reduce_max_f32((const uint8_t *) wp0, ne00);
+                    float sum = hvx_softmax_f32((const uint8_t *) wp0, (uint8_t *) wp2, (uint8_t *) wp1, ne00, max);
+                    sum       = sum > 0.0 ? (1.0 / sum) : 1;
+                    hvx_scale_f32((uint8_t *) dp, (const uint8_t *) wp2, ne00, sum);
+                }
+            }
+        }
+    }
+}
+
+static void softmax_job_f32_per_thread(struct softmax_th_ctx * softmax_ctx, int nth, int ith) {
+    struct htp_ops_context * octx = softmax_ctx->octx;
+
+    const struct htp_tensor * src0 = &octx->src0;
+    const struct htp_tensor * src1 = &octx->src1;
+    struct htp_tensor *       dst  = &octx->dst;
+
+    htp_softmax_preamble3;
+
+    const uint32_t src0_nrows            = ne01 * ne02 * ne03;  // src0 rows
+    const uint32_t src0_nrows_per_thread = octx->src0_nrows_per_thread;
+
+    const uint32_t src0_start_row = src0_nrows_per_thread * ith;
+    const uint32_t src0_end_row   = MIN(src0_start_row + src0_nrows_per_thread, src0_nrows);
+
+    // no work for this thread
+    if (src0_start_row >= src0_end_row) {
+        return;
+    }
+
+    uint64_t t1, t2;
+    t1 = HAP_perf_get_qtimer_count();
+
+    int is_aligned = 1;
+    int opt_path   = 0;
+    if (!hex_is_aligned((void *) src0->data, VLEN) || !hex_is_aligned((void *) dst->data, VLEN)) {
+        is_aligned = 0;
+        FARF(HIGH, "softmax-f32: unaligned addresses in elementwise op, possibly slower execution\n");
+    }
+    if ((1 == is_aligned) && !(nb01 & (VLEN - 1))) {
+        opt_path = 1;
+    }
+
+    softmax_htp_f32(nth, ith, softmax_ctx, opt_path);
+
+    t2 = HAP_perf_get_qtimer_count();
+
+    FARF(HIGH, "softmax-f32 %d/%d/%d/%d: %ux%ux%ux%u (%u:%u) x %ux%ux%ux%u -> %ux%ux%ux%u usec %u\n", ith, nth,
+         softmax_ctx->use_f16, opt_path, ne00, ne01, ne02, ne03, src0_start_row, src0_end_row, ne10, ne11, ne12, ne13,
+         ne0, ne1, ne2, ne3, (unsigned) HAP_perf_qtimer_count_to_us(t2 - t1));
+}
+
+static void softmax_job_dispatcher_f32(unsigned int n, unsigned int i, void * p_data) {
+    struct softmax_th_ctx * p_softmax_ctx = (struct softmax_th_ctx *) p_data;
+    softmax_job_f32_per_thread(p_softmax_ctx, n, i);
+}
+
+static int execute_op_softmax_f32(struct htp_ops_context * octx) {
+    int err = HTP_STATUS_OK;
+
+    const struct htp_tensor * src0 = &octx->src0;
+    const struct htp_tensor * src1 = &octx->src1;
+    struct htp_tensor *       dst  = &octx->dst;
+
+    worker_callback_t op_func;
+    const char *      op_type = NULL;
+
+    struct softmax_th_ctx softmax_ctx;
+
+    switch (octx->op) {
+        case HTP_OP_SOFTMAX:
+            op_func = softmax_job_dispatcher_f32;
+            op_type = "softmax-f32";
+
+            init_softmax_ctx(&softmax_ctx, octx);
+            break;
+
+        default:
+            FARF(ERROR, "Unsupported Op %u\n", octx->op);
+            return HTP_STATUS_NO_SUPPORT;
+    }
+
+    const uint32_t n_threads = octx->n_threads;
+
+    const size_t src0_row_size = src0->nb[1];
+    const size_t src1_row_size = src0_row_size;
+    const size_t dst_row_size  = dst->nb[1];
+
+    // VTCM scratchpads for all tensors
+    // N rows per thread, padded to HVX vector size
+    octx->dst_spad.size  = hex_round_up(dst_row_size, 128) * n_threads;
+    octx->src0_spad.size = hex_round_up(src0_row_size, 128) * n_threads;
+    octx->src1_spad.size = hex_round_up(src1_row_size, 128) * n_threads;
+
+    size_t spad_size = octx->src0_spad.size + octx->src1_spad.size + octx->dst_spad.size;
+
+    if (src1->ne[0]) {
+        FARF(HIGH,
+             "%s: %ux%ux%ux%u x %ux%ux%ux%u -> %ux%ux%ux%u : src0-spad-size %u src1-spad-size %u dst-spad-size %u\n",
+             op_type, src0->ne[0], src0->ne[1], src0->ne[2], src0->ne[3], src1->ne[0], src1->ne[1], src1->ne[2],
+             src1->ne[3], dst->ne[0], dst->ne[1], dst->ne[2], dst->ne[3], octx->src0_spad.size, octx->src1_spad.size,
+             octx->dst_spad.size);
+    } else {
+        FARF(HIGH, "%s: %ux%ux%ux%u -> %ux%ux%ux%u : src0-spad-size %u src1-spad-size %u dst-spad-size %u\n", op_type,
+             src0->ne[0], src0->ne[1], src0->ne[2], src0->ne[3], dst->ne[0], dst->ne[1], dst->ne[2], dst->ne[3],
+             octx->src0_spad.size, octx->src1_spad.size, octx->dst_spad.size);
+    }
+
+    // Make sure the reserved vtcm size is sufficient
+    if (octx->ctx->vtcm_size < spad_size) {
+        FARF(ERROR, "%s : current VTCM reservation %zu is too small, needed %zu\n", op_type, octx->ctx->vtcm_size,
+             spad_size);
+        return HTP_STATUS_VTCM_TOO_SMALL;
+    }
+
+    octx->src0_spad.data = octx->ctx->vtcm_base;
+    octx->src1_spad.data = octx->src0_spad.data + octx->src0_spad.size;
+    octx->dst_spad.data  = octx->src1_spad.data + octx->src1_spad.size;
+
+    uint32_t src0_nrows = src0->ne[1] * src0->ne[2] * src0->ne[3];
+
+    if (!(octx->flags & HTP_OPFLAGS_SKIP_COMPUTE)) {
+        uint32_t n_jobs             = MIN(n_threads, src0_nrows);
+        octx->src0_nrows_per_thread = (src0_nrows + n_jobs - 1) / n_jobs;
+        worker_pool_run_func(octx->ctx->worker_pool, op_func, &softmax_ctx, n_jobs);
+    }
+
+    return err;
+}
+
+int op_softmax(struct htp_ops_context * octx) {
+    int err = HTP_STATUS_OK;
+
+    switch (octx->src0.type) {
+        case HTP_TYPE_F32:
+            err = execute_op_softmax_f32(octx);
+            break;
+
+        default:
+            err = HTP_STATUS_NO_SUPPORT;
+            break;
+    }
+
+    return err;
+}