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52e85aa6fb
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perf: drop stdint.h + picolibc — zero libc dependency
dma.h: typedef u32 instead of uint32_t, no stdint.h include
dma.c: use u32 instead of uint32_t
user-sample.c: unsigned char/int instead of uint8_t/uint32_t
Makefile: filter-out -lc -lm -lg -lsemihost from LDFLAGS
→ picolibc .data section (2.1KB, 532 words) eliminated
→ startup data-copy loop: ~30000 → ~200 cycles
→ total start.S latency: ~44000 → ~14000 cycles (~0.42ms at 33MHz)
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2026-06-26 22:34:26 +08:00 |
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81c636fb56
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perf(matmul): pre-fire DMA Ch0 load + inline wait/DMA start + XOR bank toggle
user-sample.c v2 optimizations:
- Pre-fire DMA Ch0 load at loop tail to overlap fully with IP compute
- Inline wait_matmul_done/wait_dma_done to eliminate function call overhead
- Inline DMA register writes, skip redundant STATUS_BUSY_BIT check
- Replace g%2 with XOR bank toggle (bank ^= 1)
- Cache volatile pointers in locals (ch0, ch1, mat_status, mat_ctrl)
Makefile: bump -O2 to -O3
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2026-06-26 03:39:32 +08:00 |
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a42568f635
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Clean production code: -O2, read CRC32 from ExtRAM, remove all debug
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2026-06-24 23:42:35 +08:00 |
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aaefb04737
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Sync asm/ (user-sample.c + Makefile) from test branch
MATMUL_GROUP_NUM defaults to 5000, overridable for fast local testing.
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2026-06-24 17:01:45 +08:00 |
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fbc993b846
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Initial commit: Loongson FPGA SoC project for 2026 CIC-IEC
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2026-06-23 01:22:45 +08:00 |
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