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Pure and inline ASM for the PowerPC 32-bit.
SparkiDev
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retest this please |
Slower but smaller SHA-256 assembly code implementation enabled with: WOLFSSL_PPC32_ASM_SMALL. (--enable-ppc32=small or --enable-ppc32=inline,small)
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libspdm failing as https://git.cryptomilk.org/ not available. |
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retest this please PRB-single-flag.txt_25: java.io.StreamCorruptedException: invalid stream header |
dgarske
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Jun 20, 2025
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Code Size Comparison
| Configuration | Text | Data | BSS | Total (Dec) | Total (Hex) | Filename |
|---|---|---|---|---|---|---|
| c (-Os) | 41,555 | 116 | 5,172 | 46,843 | b6fb | wolfboot.elf |
| cslow | 40,919 | 116 | 5,168 | 46,203 | b47b | wolfboot.elf |
| ppc-asm-small | 43,247 | 116 | 5,176 | 48,539 | bd9b | wolfboot.elf |
| ppc-asm | 44,655 | 116 | 5,176 | 49,947 | c31b | wolfboot.elf |
SHA2-256 Performance Result (hashing 3,170,724 bytes)
Benchmarking on Freescale/NXP P1021 e500v2 at 800MHz
| Configuration | Time (ms) | Throughput (KB/sec) |
|---|---|---|
| c -Os | 124 | 24,970 |
| c -O2 | 121 | 25,590 |
| cslow | 240 | 12,902 |
| ppcasm-small | 118 | 26,242 |
| ppcasm | 110 | 28,148 |
Note: cslow = USE_SLOW_SHA256
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Description
Pure and inline ASM for the PowerPC 32-bit.
Testing
./autogen.sh
./configure --disable-shared LDFLAGS=--static --host=powerpc CC=powerpc-linux-gnu-gcc --enable-ppc32-asm
./configure --disable-shared LDFLAGS=--static --host=powerpc CC=powerpc-linux-gnu-gcc --enable-ppc32-asm=inline
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