busybox/libbb/hash_md5_sha256_x86-32_shaNI.S

#if ENABLE_SHA256_HWACCEL && defined(__GNUC__) && defined(__i386__)
/* The code is adapted from Linux kernel's source */

// We use shorter insns, even though they are for "wrong"
// data type (fp, not int).
// For Intel, there is no penalty for doing it at all
// (CPUs which do have such penalty do not support SHA1 insns).
// For AMD, the penalty is one extra cycle
// (allegedly: I failed to find measurable difference).

//#define mova128 movdqa
#define mova128 movaps
//#define movu128 movdqu
#define movu128 movups
//#define shuf128_32 pshufd
#define shuf128_32 shufps

	.section	.text.sha256_process_block64_shaNI, "ax", @progbits
	.globl	sha256_process_block64_shaNI
	.hidden	sha256_process_block64_shaNI
	.type	sha256_process_block64_shaNI, @function

#define DATA_PTR	%eax

#define SHA256CONSTANTS	%ecx

#define MSG		%xmm0
#define STATE0		%xmm1
#define STATE1		%xmm2
#define MSGTMP0		%xmm3
#define MSGTMP1		%xmm4
#define MSGTMP2		%xmm5
#define MSGTMP3		%xmm6
#define XMMTMP4		%xmm7

	.balign	8	# allow decoders to fetch at least 3 first insns
sha256_process_block64_shaNI:
	pushl		%ebp
	movl		%esp, %ebp
	subl		$32, %esp
	andl		$~0xF, %esp	# paddd needs aligned memory operand

	movu128		76+0*16(%eax), STATE0
	movu128		76+1*16(%eax), STATE1

	shuf128_32	$0xB1, STATE0,  STATE0		/* CDAB */
	shuf128_32	$0x1B, STATE1,  STATE1		/* EFGH */
	mova128		STATE0, XMMTMP4
	palignr		$8, STATE1,  STATE0		/* ABEF */
	pblendw		$0xF0, XMMTMP4, STATE1		/* CDGH */

/* XMMTMP4 holds flip mask from here... */
	mova128		PSHUFFLE_BSWAP32_FLIP_MASK, XMMTMP4
	movl		$K256+8*16, SHA256CONSTANTS

	/* Save hash values for addition after rounds */
	mova128		STATE0, 0*16(%esp)
	mova128		STATE1, 1*16(%esp)

	/* Rounds 0-3 */
	movu128		0*16(DATA_PTR), MSG
	pshufb		XMMTMP4, MSG
	mova128		MSG, MSGTMP0
		paddd		0*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0

	/* Rounds 4-7 */
	movu128		1*16(DATA_PTR), MSG
	pshufb		XMMTMP4, MSG
	mova128		MSG, MSGTMP1
		paddd		1*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP1, MSGTMP0

	/* Rounds 8-11 */
	movu128		2*16(DATA_PTR), MSG
	pshufb		XMMTMP4, MSG
	mova128		MSG, MSGTMP2
		paddd		2*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP2, MSGTMP1

	/* Rounds 12-15 */
	movu128		3*16(DATA_PTR), MSG
	pshufb		XMMTMP4, MSG
/* ...to here */
	mova128		MSG, MSGTMP3
		paddd		3*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP3, XMMTMP4
	palignr		$4, MSGTMP2, XMMTMP4
	paddd		XMMTMP4, MSGTMP0
	sha256msg2	MSGTMP3, MSGTMP0
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP3, MSGTMP2

	/* Rounds 16-19 */
	mova128		MSGTMP0, MSG
		paddd		4*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP0, XMMTMP4
	palignr		$4, MSGTMP3, XMMTMP4
	paddd		XMMTMP4, MSGTMP1
	sha256msg2	MSGTMP0, MSGTMP1
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP0, MSGTMP3

	/* Rounds 20-23 */
	mova128		MSGTMP1, MSG
		paddd		5*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP1, XMMTMP4
	palignr		$4, MSGTMP0, XMMTMP4
	paddd		XMMTMP4, MSGTMP2
	sha256msg2	MSGTMP1, MSGTMP2
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP1, MSGTMP0

	/* Rounds 24-27 */
	mova128		MSGTMP2, MSG
		paddd		6*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP2, XMMTMP4
	palignr		$4, MSGTMP1, XMMTMP4
	paddd		XMMTMP4, MSGTMP3
	sha256msg2	MSGTMP2, MSGTMP3
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP2, MSGTMP1

	/* Rounds 28-31 */
	mova128		MSGTMP3, MSG
		paddd		7*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP3, XMMTMP4
	palignr		$4, MSGTMP2, XMMTMP4
	paddd		XMMTMP4, MSGTMP0
	sha256msg2	MSGTMP3, MSGTMP0
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP3, MSGTMP2

	/* Rounds 32-35 */
	mova128		MSGTMP0, MSG
		paddd		8*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP0, XMMTMP4
	palignr		$4, MSGTMP3, XMMTMP4
	paddd		XMMTMP4, MSGTMP1
	sha256msg2	MSGTMP0, MSGTMP1
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP0, MSGTMP3

	/* Rounds 36-39 */
	mova128		MSGTMP1, MSG
		paddd		9*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP1, XMMTMP4
	palignr		$4, MSGTMP0, XMMTMP4
	paddd		XMMTMP4, MSGTMP2
	sha256msg2	MSGTMP1, MSGTMP2
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP1, MSGTMP0

	/* Rounds 40-43 */
	mova128		MSGTMP2, MSG
		paddd		10*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP2, XMMTMP4
	palignr		$4, MSGTMP1, XMMTMP4
	paddd		XMMTMP4, MSGTMP3
	sha256msg2	MSGTMP2, MSGTMP3
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP2, MSGTMP1

	/* Rounds 44-47 */
	mova128		MSGTMP3, MSG
		paddd		11*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP3, XMMTMP4
	palignr		$4, MSGTMP2, XMMTMP4
	paddd		XMMTMP4, MSGTMP0
	sha256msg2	MSGTMP3, MSGTMP0
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP3, MSGTMP2

	/* Rounds 48-51 */
	mova128		MSGTMP0, MSG
		paddd		12*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP0, XMMTMP4
	palignr		$4, MSGTMP3, XMMTMP4
	paddd		XMMTMP4, MSGTMP1
	sha256msg2	MSGTMP0, MSGTMP1
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0
	sha256msg1	MSGTMP0, MSGTMP3

	/* Rounds 52-55 */
	mova128		MSGTMP1, MSG
		paddd		13*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP1, XMMTMP4
	palignr		$4, MSGTMP0, XMMTMP4
	paddd		XMMTMP4, MSGTMP2
	sha256msg2	MSGTMP1, MSGTMP2
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0

	/* Rounds 56-59 */
	mova128		MSGTMP2, MSG
		paddd		14*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
	mova128		MSGTMP2, XMMTMP4
	palignr		$4, MSGTMP1, XMMTMP4
	paddd		XMMTMP4, MSGTMP3
	sha256msg2	MSGTMP2, MSGTMP3
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0

	/* Rounds 60-63 */
	mova128		MSGTMP3, MSG
		paddd		15*16-8*16(SHA256CONSTANTS), MSG
		sha256rnds2	STATE0, STATE1
		shuf128_32	$0x0E, MSG, MSG
		sha256rnds2	STATE1, STATE0

	/* Add current hash values with previously saved */
	paddd		0*16(%esp), STATE0
	paddd		1*16(%esp), STATE1

	/* Write hash values back in the correct order */
	shuf128_32	$0x1B, STATE0,  STATE0		/* FEBA */
	shuf128_32	$0xB1, STATE1,  STATE1		/* DCHG */
	mova128		STATE0, XMMTMP4
	pblendw		$0xF0, STATE1,  STATE0		/* DCBA */
	palignr		$8, XMMTMP4, STATE1		/* HGFE */

	movu128		STATE0, 76+0*16(%eax)
	movu128		STATE1, 76+1*16(%eax)

	movl	%ebp, %esp
	popl	%ebp
	ret
	.size	sha256_process_block64_shaNI, .-sha256_process_block64_shaNI

	.section	.rodata.cst256.K256, "aM", @progbits, 256
	.balign 16
K256:
	.long	0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
	.long	0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
	.long	0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
	.long	0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
	.long	0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
	.long	0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
	.long	0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
	.long	0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
	.long	0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
	.long	0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
	.long	0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
	.long	0xd192e819,0xd6990624,0xf40e3585,0x106aa070
	.long	0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
	.long	0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
	.long	0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
	.long	0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2

	.section	.rodata.cst16.PSHUFFLE_BSWAP32_FLIP_MASK, "aM", @progbits, 16
	.balign 16
PSHUFFLE_BSWAP32_FLIP_MASK:
	.octa 0x0c0d0e0f08090a0b0405060700010203

#endif