3  * Hardware-accelerated CRC-32 variants for Linux on z Systems
6  * computing of bitreflected CRC-32 checksums for IEEE 802.3 Ethernet
9  * This CRC-32 implementation algorithm is bitreflected and processes
20 /* Vector register range containing CRC-32 constants */
29  * The CRC-32 constant block contains reduction constants to fold and
32  * For the CRC-32 variants, the constants are precomputed according to
48  * CRC-32 (IEEE 802.3 Ethernet, ...) polynomials:
53  * CRC-32C (Castagnoli) polynomials:
78  * crc32_le_vgfm_generic - Compute CRC-32 (LE variant) with vector registers
79  * @crc: Initial CRC value, typically ~0.
83  * @constants: CRC-32 constant pool base pointer.
86  *	V0:	  Initial CRC value and intermediate constants and results.
87  *	V1..V4:	  Data for CRC computation.
90  *	V10..V14: CRC-32 constants.
92 static u32 crc32_le_vgfm_generic(u32 crc, unsigned char const *buf, size_t size, unsigned long *con…  in crc32_le_vgfm_generic()  argument
94 	/* Load CRC-32 constants */  in crc32_le_vgfm_generic()
98 	 * Load the initial CRC value.  in crc32_le_vgfm_generic()
100 	 * The CRC value is loaded into the rightmost word of the  in crc32_le_vgfm_generic()
105 	fpu_vlvgf(0, crc, 3);		/* Load CRC into rightmost word */  in crc32_le_vgfm_generic()
107 	/* Load a 64-byte data chunk and XOR with CRC */  in crc32_le_vgfm_generic()
114 	fpu_vx(1, 0, 1);		/* V1 ^= CRC */  in crc32_le_vgfm_generic()
199 	 * Apply a Barret reduction to compute the final 32-bit CRC value.  in crc32_le_vgfm_generic()
203 	 * constant u.	The Barret reduction result is the CRC value of R(x) mod  in crc32_le_vgfm_generic()
222 	 * Compute the GF(2) product of the CRC polynomial with T1(x) in  in crc32_le_vgfm_generic()
232 u32 crc32_le_vgfm_16(u32 crc, unsigned char const *buf, size_t size)  in crc32_le_vgfm_16()  argument
234 	return crc32_le_vgfm_generic(crc, buf, size, &constants_CRC_32_LE[0]);  in crc32_le_vgfm_16()
237 u32 crc32c_le_vgfm_16(u32 crc, unsigned char const *buf, size_t size)  in crc32c_le_vgfm_16()  argument
239 	return crc32_le_vgfm_generic(crc, buf, size, &constants_CRC_32C_LE[0]);  in crc32c_le_vgfm_16()