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      1 /**************************************************************************
      2  *
      3  * Copyright 2013 Advanced Micro Devices, Inc.
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     21  * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 
     28 #include <stdio.h>
     29 
     30 #include "pipe/p_video_codec.h"
     31 
     32 #include "util/u_video.h"
     33 #include "util/u_memory.h"
     34 
     35 #include "vl/vl_video_buffer.h"
     36 
     37 #include "radeonsi/si_pipe.h"
     38 #include "radeon_video.h"
     39 #include "radeon_vce.h"
     40 
     41 #define FW_40_2_2 ((40 << 24) | (2 << 16) | (2 << 8))
     42 #define FW_50_0_1 ((50 << 24) | (0 << 16) | (1 << 8))
     43 #define FW_50_1_2 ((50 << 24) | (1 << 16) | (2 << 8))
     44 #define FW_50_10_2 ((50 << 24) | (10 << 16) | (2 << 8))
     45 #define FW_50_17_3 ((50 << 24) | (17 << 16) | (3 << 8))
     46 #define FW_52_0_3 ((52 << 24) | (0 << 16) | (3 << 8))
     47 #define FW_52_4_3 ((52 << 24) | (4 << 16) | (3 << 8))
     48 #define FW_52_8_3 ((52 << 24) | (8 << 16) | (3 << 8))
     49 #define FW_53 (53 << 24)
     50 
     51 /**
     52  * flush commands to the hardware
     53  */
     54 static void flush(struct rvce_encoder *enc)
     55 {
     56 	enc->ws->cs_flush(enc->cs, PIPE_FLUSH_ASYNC, NULL);
     57 	enc->task_info_idx = 0;
     58 	enc->bs_idx = 0;
     59 }
     60 
     61 #if 0
     62 static void dump_feedback(struct rvce_encoder *enc, struct rvid_buffer *fb)
     63 {
     64 	uint32_t *ptr = enc->ws->buffer_map(fb->res->buf, enc->cs, PIPE_TRANSFER_READ_WRITE);
     65 	unsigned i = 0;
     66 	fprintf(stderr, "\n");
     67 	fprintf(stderr, "encStatus:\t\t\t%08x\n", ptr[i++]);
     68 	fprintf(stderr, "encHasBitstream:\t\t%08x\n", ptr[i++]);
     69 	fprintf(stderr, "encHasAudioBitstream:\t\t%08x\n", ptr[i++]);
     70 	fprintf(stderr, "encBitstreamOffset:\t\t%08x\n", ptr[i++]);
     71 	fprintf(stderr, "encBitstreamSize:\t\t%08x\n", ptr[i++]);
     72 	fprintf(stderr, "encAudioBitstreamOffset:\t%08x\n", ptr[i++]);
     73 	fprintf(stderr, "encAudioBitstreamSize:\t\t%08x\n", ptr[i++]);
     74 	fprintf(stderr, "encExtrabytes:\t\t\t%08x\n", ptr[i++]);
     75 	fprintf(stderr, "encAudioExtrabytes:\t\t%08x\n", ptr[i++]);
     76 	fprintf(stderr, "videoTimeStamp:\t\t\t%08x\n", ptr[i++]);
     77 	fprintf(stderr, "audioTimeStamp:\t\t\t%08x\n", ptr[i++]);
     78 	fprintf(stderr, "videoOutputType:\t\t%08x\n", ptr[i++]);
     79 	fprintf(stderr, "attributeFlags:\t\t\t%08x\n", ptr[i++]);
     80 	fprintf(stderr, "seiPrivatePackageOffset:\t%08x\n", ptr[i++]);
     81 	fprintf(stderr, "seiPrivatePackageSize:\t\t%08x\n", ptr[i++]);
     82 	fprintf(stderr, "\n");
     83 	enc->ws->buffer_unmap(fb->res->buf);
     84 }
     85 #endif
     86 
     87 /**
     88  * reset the CPB handling
     89  */
     90 static void reset_cpb(struct rvce_encoder *enc)
     91 {
     92 	unsigned i;
     93 
     94 	LIST_INITHEAD(&enc->cpb_slots);
     95 	for (i = 0; i < enc->cpb_num; ++i) {
     96 		struct rvce_cpb_slot *slot = &enc->cpb_array[i];
     97 		slot->index = i;
     98 		slot->picture_type = PIPE_H264_ENC_PICTURE_TYPE_SKIP;
     99 		slot->frame_num = 0;
    100 		slot->pic_order_cnt = 0;
    101 		LIST_ADDTAIL(&slot->list, &enc->cpb_slots);
    102 	}
    103 }
    104 
    105 /**
    106  * sort l0 and l1 to the top of the list
    107  */
    108 static void sort_cpb(struct rvce_encoder *enc)
    109 {
    110 	struct rvce_cpb_slot *i, *l0 = NULL, *l1 = NULL;
    111 
    112 	LIST_FOR_EACH_ENTRY(i, &enc->cpb_slots, list) {
    113 		if (i->frame_num == enc->pic.ref_idx_l0)
    114 			l0 = i;
    115 
    116 		if (i->frame_num == enc->pic.ref_idx_l1)
    117 			l1 = i;
    118 
    119 		if (enc->pic.picture_type == PIPE_H264_ENC_PICTURE_TYPE_P && l0)
    120 			break;
    121 
    122 		if (enc->pic.picture_type == PIPE_H264_ENC_PICTURE_TYPE_B &&
    123 		    l0 && l1)
    124 			break;
    125 	}
    126 
    127 	if (l1) {
    128 		LIST_DEL(&l1->list);
    129 		LIST_ADD(&l1->list, &enc->cpb_slots);
    130 	}
    131 
    132 	if (l0) {
    133 		LIST_DEL(&l0->list);
    134 		LIST_ADD(&l0->list, &enc->cpb_slots);
    135 	}
    136 }
    137 
    138 /**
    139  * get number of cpbs based on dpb
    140  */
    141 static unsigned get_cpb_num(struct rvce_encoder *enc)
    142 {
    143 	unsigned w = align(enc->base.width, 16) / 16;
    144 	unsigned h = align(enc->base.height, 16) / 16;
    145 	unsigned dpb;
    146 
    147 	switch (enc->base.level) {
    148 	case 10:
    149 		dpb = 396;
    150 		break;
    151 	case 11:
    152 		dpb = 900;
    153 		break;
    154 	case 12:
    155 	case 13:
    156 	case 20:
    157 		dpb = 2376;
    158 		break;
    159 	case 21:
    160 		dpb = 4752;
    161 		break;
    162 	case 22:
    163 	case 30:
    164 		dpb = 8100;
    165 		break;
    166 	case 31:
    167 		dpb = 18000;
    168 		break;
    169 	case 32:
    170 		dpb = 20480;
    171 		break;
    172 	case 40:
    173 	case 41:
    174 		dpb = 32768;
    175 		break;
    176 	case 42:
    177 		dpb = 34816;
    178 		break;
    179 	case 50:
    180 		dpb = 110400;
    181 		break;
    182 	default:
    183 	case 51:
    184 	case 52:
    185 		dpb = 184320;
    186 		break;
    187 	}
    188 
    189 	return MIN2(dpb / (w * h), 16);
    190 }
    191 
    192 /**
    193  * Get the slot for the currently encoded frame
    194  */
    195 struct rvce_cpb_slot *si_current_slot(struct rvce_encoder *enc)
    196 {
    197 	return LIST_ENTRY(struct rvce_cpb_slot, enc->cpb_slots.prev, list);
    198 }
    199 
    200 /**
    201  * Get the slot for L0
    202  */
    203 struct rvce_cpb_slot *si_l0_slot(struct rvce_encoder *enc)
    204 {
    205 	return LIST_ENTRY(struct rvce_cpb_slot, enc->cpb_slots.next, list);
    206 }
    207 
    208 /**
    209  * Get the slot for L1
    210  */
    211 struct rvce_cpb_slot *si_l1_slot(struct rvce_encoder *enc)
    212 {
    213 	return LIST_ENTRY(struct rvce_cpb_slot, enc->cpb_slots.next->next, list);
    214 }
    215 
    216 /**
    217  * Calculate the offsets into the CPB
    218  */
    219 void si_vce_frame_offset(struct rvce_encoder *enc, struct rvce_cpb_slot *slot,
    220 			 signed *luma_offset, signed *chroma_offset)
    221 {
    222 	struct si_screen *sscreen = (struct si_screen *)enc->screen;
    223 	unsigned pitch, vpitch, fsize;
    224 
    225 	if (sscreen->info.chip_class < GFX9) {
    226 		pitch = align(enc->luma->u.legacy.level[0].nblk_x * enc->luma->bpe, 128);
    227 		vpitch = align(enc->luma->u.legacy.level[0].nblk_y, 16);
    228 	} else {
    229 		pitch = align(enc->luma->u.gfx9.surf_pitch * enc->luma->bpe, 256);
    230 		vpitch = align(enc->luma->u.gfx9.surf_height, 16);
    231 	}
    232 	fsize = pitch * (vpitch + vpitch / 2);
    233 
    234 	*luma_offset = slot->index * fsize;
    235 	*chroma_offset = *luma_offset + pitch * vpitch;
    236 }
    237 
    238 /**
    239  * destroy this video encoder
    240  */
    241 static void rvce_destroy(struct pipe_video_codec *encoder)
    242 {
    243 	struct rvce_encoder *enc = (struct rvce_encoder*)encoder;
    244 	if (enc->stream_handle) {
    245 		struct rvid_buffer fb;
    246 		si_vid_create_buffer(enc->screen, &fb, 512, PIPE_USAGE_STAGING);
    247 		enc->fb = &fb;
    248 		enc->session(enc);
    249 		enc->destroy(enc);
    250 		flush(enc);
    251 		si_vid_destroy_buffer(&fb);
    252 	}
    253 	si_vid_destroy_buffer(&enc->cpb);
    254 	enc->ws->cs_destroy(enc->cs);
    255 	FREE(enc->cpb_array);
    256 	FREE(enc);
    257 }
    258 
    259 static void rvce_begin_frame(struct pipe_video_codec *encoder,
    260 			     struct pipe_video_buffer *source,
    261 			     struct pipe_picture_desc *picture)
    262 {
    263 	struct rvce_encoder *enc = (struct rvce_encoder*)encoder;
    264 	struct vl_video_buffer *vid_buf = (struct vl_video_buffer *)source;
    265 	struct pipe_h264_enc_picture_desc *pic = (struct pipe_h264_enc_picture_desc *)picture;
    266 
    267 	bool need_rate_control =
    268 		enc->pic.rate_ctrl.rate_ctrl_method != pic->rate_ctrl.rate_ctrl_method ||
    269 		enc->pic.quant_i_frames != pic->quant_i_frames ||
    270 		enc->pic.quant_p_frames != pic->quant_p_frames ||
    271 		enc->pic.quant_b_frames != pic->quant_b_frames;
    272 
    273 	enc->pic = *pic;
    274 	si_get_pic_param(enc, pic);
    275 
    276 	enc->get_buffer(vid_buf->resources[0], &enc->handle, &enc->luma);
    277 	enc->get_buffer(vid_buf->resources[1], NULL, &enc->chroma);
    278 
    279 	if (pic->picture_type == PIPE_H264_ENC_PICTURE_TYPE_IDR)
    280 		reset_cpb(enc);
    281 	else if (pic->picture_type == PIPE_H264_ENC_PICTURE_TYPE_P ||
    282 	         pic->picture_type == PIPE_H264_ENC_PICTURE_TYPE_B)
    283 		sort_cpb(enc);
    284 
    285 	if (!enc->stream_handle) {
    286 		struct rvid_buffer fb;
    287 		enc->stream_handle = si_vid_alloc_stream_handle();
    288 		si_vid_create_buffer(enc->screen, &fb, 512, PIPE_USAGE_STAGING);
    289 		enc->fb = &fb;
    290 		enc->session(enc);
    291 		enc->create(enc);
    292 		enc->config(enc);
    293 		enc->feedback(enc);
    294 		flush(enc);
    295 		//dump_feedback(enc, &fb);
    296 		si_vid_destroy_buffer(&fb);
    297 		need_rate_control = false;
    298 	}
    299 
    300 	if (need_rate_control) {
    301 		enc->session(enc);
    302 		enc->config(enc);
    303 		flush(enc);
    304 	}
    305 }
    306 
    307 static void rvce_encode_bitstream(struct pipe_video_codec *encoder,
    308 				  struct pipe_video_buffer *source,
    309 				  struct pipe_resource *destination,
    310 				  void **fb)
    311 {
    312 	struct rvce_encoder *enc = (struct rvce_encoder*)encoder;
    313 	enc->get_buffer(destination, &enc->bs_handle, NULL);
    314 	enc->bs_size = destination->width0;
    315 
    316 	*fb = enc->fb = CALLOC_STRUCT(rvid_buffer);
    317 	if (!si_vid_create_buffer(enc->screen, enc->fb, 512, PIPE_USAGE_STAGING)) {
    318 		RVID_ERR("Can't create feedback buffer.\n");
    319 		return;
    320 	}
    321 	if (!radeon_emitted(enc->cs, 0))
    322 		enc->session(enc);
    323 	enc->encode(enc);
    324 	enc->feedback(enc);
    325 }
    326 
    327 static void rvce_end_frame(struct pipe_video_codec *encoder,
    328 			   struct pipe_video_buffer *source,
    329 			   struct pipe_picture_desc *picture)
    330 {
    331 	struct rvce_encoder *enc = (struct rvce_encoder*)encoder;
    332 	struct rvce_cpb_slot *slot = LIST_ENTRY(
    333 		struct rvce_cpb_slot, enc->cpb_slots.prev, list);
    334 
    335 	if (!enc->dual_inst || enc->bs_idx > 1)
    336 		flush(enc);
    337 
    338 	/* update the CPB backtrack with the just encoded frame */
    339 	slot->picture_type = enc->pic.picture_type;
    340 	slot->frame_num = enc->pic.frame_num;
    341 	slot->pic_order_cnt = enc->pic.pic_order_cnt;
    342 	if (!enc->pic.not_referenced) {
    343 		LIST_DEL(&slot->list);
    344 		LIST_ADD(&slot->list, &enc->cpb_slots);
    345 	}
    346 }
    347 
    348 static void rvce_get_feedback(struct pipe_video_codec *encoder,
    349 			      void *feedback, unsigned *size)
    350 {
    351 	struct rvce_encoder *enc = (struct rvce_encoder*)encoder;
    352 	struct rvid_buffer *fb = feedback;
    353 
    354 	if (size) {
    355 		uint32_t *ptr = enc->ws->buffer_map(fb->res->buf, enc->cs, PIPE_TRANSFER_READ_WRITE);
    356 
    357 		if (ptr[1]) {
    358 			*size = ptr[4] - ptr[9];
    359 		} else {
    360 			*size = 0;
    361 		}
    362 
    363 		enc->ws->buffer_unmap(fb->res->buf);
    364 	}
    365 	//dump_feedback(enc, fb);
    366 	si_vid_destroy_buffer(fb);
    367 	FREE(fb);
    368 }
    369 
    370 /**
    371  * flush any outstanding command buffers to the hardware
    372  */
    373 static void rvce_flush(struct pipe_video_codec *encoder)
    374 {
    375 	struct rvce_encoder *enc = (struct rvce_encoder*)encoder;
    376 
    377 	flush(enc);
    378 }
    379 
    380 static void rvce_cs_flush(void *ctx, unsigned flags,
    381 			  struct pipe_fence_handle **fence)
    382 {
    383 	// just ignored
    384 }
    385 
    386 struct pipe_video_codec *si_vce_create_encoder(struct pipe_context *context,
    387 					       const struct pipe_video_codec *templ,
    388 					       struct radeon_winsys* ws,
    389 					       rvce_get_buffer get_buffer)
    390 {
    391 	struct si_screen *sscreen = (struct si_screen *)context->screen;
    392 	struct r600_common_context *rctx = (struct r600_common_context*)context;
    393 	struct rvce_encoder *enc;
    394 	struct pipe_video_buffer *tmp_buf, templat = {};
    395 	struct radeon_surf *tmp_surf;
    396 	unsigned cpb_size;
    397 
    398 	if (!sscreen->info.vce_fw_version) {
    399 		RVID_ERR("Kernel doesn't supports VCE!\n");
    400 		return NULL;
    401 
    402 	} else if (!si_vce_is_fw_version_supported(sscreen)) {
    403 		RVID_ERR("Unsupported VCE fw version loaded!\n");
    404 		return NULL;
    405 	}
    406 
    407 	enc = CALLOC_STRUCT(rvce_encoder);
    408 	if (!enc)
    409 		return NULL;
    410 
    411 	if (sscreen->info.drm_major == 3)
    412 		enc->use_vm = true;
    413 	if ((sscreen->info.drm_major == 2 && sscreen->info.drm_minor >= 42) ||
    414             sscreen->info.drm_major == 3)
    415 		enc->use_vui = true;
    416 	if (sscreen->info.family >= CHIP_TONGA &&
    417 	    sscreen->info.family != CHIP_STONEY &&
    418 	    sscreen->info.family != CHIP_POLARIS11 &&
    419 	    sscreen->info.family != CHIP_POLARIS12)
    420 		enc->dual_pipe = true;
    421 	/* TODO enable B frame with dual instance */
    422 	if ((sscreen->info.family >= CHIP_TONGA) &&
    423 		(templ->max_references == 1) &&
    424 		(sscreen->info.vce_harvest_config == 0))
    425 		enc->dual_inst = true;
    426 
    427 	enc->base = *templ;
    428 	enc->base.context = context;
    429 
    430 	enc->base.destroy = rvce_destroy;
    431 	enc->base.begin_frame = rvce_begin_frame;
    432 	enc->base.encode_bitstream = rvce_encode_bitstream;
    433 	enc->base.end_frame = rvce_end_frame;
    434 	enc->base.flush = rvce_flush;
    435 	enc->base.get_feedback = rvce_get_feedback;
    436 	enc->get_buffer = get_buffer;
    437 
    438 	enc->screen = context->screen;
    439 	enc->ws = ws;
    440 	enc->cs = ws->cs_create(rctx->ctx, RING_VCE, rvce_cs_flush, enc);
    441 	if (!enc->cs) {
    442 		RVID_ERR("Can't get command submission context.\n");
    443 		goto error;
    444 	}
    445 
    446 	templat.buffer_format = PIPE_FORMAT_NV12;
    447 	templat.chroma_format = PIPE_VIDEO_CHROMA_FORMAT_420;
    448 	templat.width = enc->base.width;
    449 	templat.height = enc->base.height;
    450 	templat.interlaced = false;
    451 	if (!(tmp_buf = context->create_video_buffer(context, &templat))) {
    452 		RVID_ERR("Can't create video buffer.\n");
    453 		goto error;
    454 	}
    455 
    456 	enc->cpb_num = get_cpb_num(enc);
    457 	if (!enc->cpb_num)
    458 		goto error;
    459 
    460 	get_buffer(((struct vl_video_buffer *)tmp_buf)->resources[0], NULL, &tmp_surf);
    461 
    462 	cpb_size = (sscreen->info.chip_class < GFX9) ?
    463 		align(tmp_surf->u.legacy.level[0].nblk_x * tmp_surf->bpe, 128) *
    464 		align(tmp_surf->u.legacy.level[0].nblk_y, 32) :
    465 
    466 		align(tmp_surf->u.gfx9.surf_pitch * tmp_surf->bpe, 256) *
    467 		align(tmp_surf->u.gfx9.surf_height, 32);
    468 
    469 	cpb_size = cpb_size * 3 / 2;
    470 	cpb_size = cpb_size * enc->cpb_num;
    471 	if (enc->dual_pipe)
    472 		cpb_size +=  RVCE_MAX_AUX_BUFFER_NUM *
    473 			RVCE_MAX_BITSTREAM_OUTPUT_ROW_SIZE * 2;
    474 	tmp_buf->destroy(tmp_buf);
    475 	if (!si_vid_create_buffer(enc->screen, &enc->cpb, cpb_size, PIPE_USAGE_DEFAULT)) {
    476 		RVID_ERR("Can't create CPB buffer.\n");
    477 		goto error;
    478 	}
    479 
    480 	enc->cpb_array = CALLOC(enc->cpb_num, sizeof(struct rvce_cpb_slot));
    481 	if (!enc->cpb_array)
    482 		goto error;
    483 
    484 	reset_cpb(enc);
    485 
    486 	switch (sscreen->info.vce_fw_version) {
    487 	case FW_40_2_2:
    488 		si_vce_40_2_2_init(enc);
    489 		si_get_pic_param = si_vce_40_2_2_get_param;
    490 		break;
    491 
    492 	case FW_50_0_1:
    493 	case FW_50_1_2:
    494 	case FW_50_10_2:
    495 	case FW_50_17_3:
    496 		si_vce_50_init(enc);
    497 		si_get_pic_param = si_vce_50_get_param;
    498 		break;
    499 
    500 	case FW_52_0_3:
    501 	case FW_52_4_3:
    502 	case FW_52_8_3:
    503 		si_vce_52_init(enc);
    504 		si_get_pic_param = si_vce_52_get_param;
    505 		break;
    506 
    507 	default:
    508 		if ((sscreen->info.vce_fw_version & (0xff << 24)) == FW_53) {
    509 			si_vce_52_init(enc);
    510 			si_get_pic_param = si_vce_52_get_param;
    511 		} else
    512 			goto error;
    513 	}
    514 
    515 	return &enc->base;
    516 
    517 error:
    518 	if (enc->cs)
    519 		enc->ws->cs_destroy(enc->cs);
    520 
    521 	si_vid_destroy_buffer(&enc->cpb);
    522 
    523 	FREE(enc->cpb_array);
    524 	FREE(enc);
    525 	return NULL;
    526 }
    527 
    528 /**
    529  * check if kernel has the right fw version loaded
    530  */
    531 bool si_vce_is_fw_version_supported(struct si_screen *sscreen)
    532 {
    533 	switch (sscreen->info.vce_fw_version) {
    534 	case FW_40_2_2:
    535 	case FW_50_0_1:
    536 	case FW_50_1_2:
    537 	case FW_50_10_2:
    538 	case FW_50_17_3:
    539 	case FW_52_0_3:
    540 	case FW_52_4_3:
    541 	case FW_52_8_3:
    542 		return true;
    543 	default:
    544 		if ((sscreen->info.vce_fw_version & (0xff << 24)) == FW_53)
    545 			return true;
    546 		else
    547 			return false;
    548 	}
    549 }
    550 
    551 /**
    552  * Add the buffer as relocation to the current command submission
    553  */
    554 void si_vce_add_buffer(struct rvce_encoder *enc, struct pb_buffer *buf,
    555 		       enum radeon_bo_usage usage, enum radeon_bo_domain domain,
    556 		       signed offset)
    557 {
    558 	int reloc_idx;
    559 
    560 	reloc_idx = enc->ws->cs_add_buffer(enc->cs, buf, usage | RADEON_USAGE_SYNCHRONIZED,
    561 					   domain, RADEON_PRIO_VCE);
    562 	if (enc->use_vm) {
    563 		uint64_t addr;
    564 		addr = enc->ws->buffer_get_virtual_address(buf);
    565 		addr = addr + offset;
    566 		RVCE_CS(addr >> 32);
    567 		RVCE_CS(addr);
    568 	} else {
    569 		offset += enc->ws->buffer_get_reloc_offset(buf);
    570 		RVCE_CS(reloc_idx * 4);
    571 		RVCE_CS(offset);
    572 	}
    573 }
    574