Added constants table

Author: fwessels

sha256block_arm64.s

@@ -13,7 +13,21 @@ TEXT ·block(SB), NOSPLIT, $0
 	SUBS $64, R2
 	BMI  complete
 
+	// Load constants table pointer
+	MOVD $·constants(SB), R3
+
+	// Cache constants table in registers v16 - v31
+	WORD $0x4cdf2870 // ld1	{v16.4s-v19.4s}, [x3], #64
+	WORD $0x4cdf7800 // ld1	{v0.4s}, [x0], #16
+	WORD $0x4cdf2874 // ld1	{v20.4s-v23.4s}, [x3], #64
+
+	WORD $0x4c407801 // ld1	{v1.4s}, [x0]
+	WORD $0x4cdf2878 // ld1	{v24.4s-v27.4s}, [x3], #64
+	WORD $0xd1004000 // sub	x0, x0, #0x10
+	WORD $0x4cdf287c // ld1	{v28.4s-v31.4s}, [x3], #64
+
 loop:
+	// Main loop
 	WORD $0x4cdf2025 // ld1	{v5.16b-v8.16b}, [x1], #64
 	WORD $0x4ea01c02 // mov	v2.16b, v0.16b
 	WORD $0x4ea11c23 // mov	v3.16b, v1.16b
@@ -115,8 +129,46 @@ loop:
 	SUBS $64, R2
 	BPL  loop
 
+	// Store result
 	WORD $0x4c00a800 // st1	{v0.4s, v1.4s}, [x0]
 
 complete:
 	RET
 
+
+// Constants table
+DATA ·constants+0x0(SB)/8, $0x71374491428a2f98
+DATA ·constants+0x8(SB)/8, $0xe9b5dba5b5c0fbcf
+DATA ·constants+0x10(SB)/8, $0x59f111f13956c25b
+DATA ·constants+0x18(SB)/8, $0xab1c5ed5923f82a4
+DATA ·constants+0x20(SB)/8, $0x12835b01d807aa98
+DATA ·constants+0x28(SB)/8, $0x550c7dc3243185be
+DATA ·constants+0x30(SB)/8, $0x80deb1fe72be5d74
+DATA ·constants+0x38(SB)/8, $0xc19bf1749bdc06a7
+DATA ·constants+0x40(SB)/8, $0xefbe4786e49b69c1
+DATA ·constants+0x48(SB)/8, $0x240ca1cc0fc19dc6
+DATA ·constants+0x50(SB)/8, $0x4a7484aa2de92c6f
+DATA ·constants+0x58(SB)/8, $0x76f988da5cb0a9dc
+DATA ·constants+0x60(SB)/8, $0xa831c66d983e5152
+DATA ·constants+0x68(SB)/8, $0xbf597fc7b00327c8
+DATA ·constants+0x70(SB)/8, $0xd5a79147c6e00bf3
+DATA ·constants+0x78(SB)/8, $0x1429296706ca6351
+DATA ·constants+0x80(SB)/8, $0x2e1b213827b70a85
+DATA ·constants+0x88(SB)/8, $0x53380d134d2c6dfc
+DATA ·constants+0x90(SB)/8, $0x766a0abb650a7354
+DATA ·constants+0x98(SB)/8, $0x92722c8581c2c92e
+DATA ·constants+0xa0(SB)/8, $0xa81a664ba2bfe8a1
+DATA ·constants+0xa8(SB)/8, $0xc76c51a3c24b8b70
+DATA ·constants+0xb0(SB)/8, $0xd6990624d192e819
+DATA ·constants+0xb8(SB)/8, $0x106aa070f40e3585
+DATA ·constants+0xc0(SB)/8, $0x1e376c0819a4c116
+DATA ·constants+0xc8(SB)/8, $0x34b0bcb52748774c
+DATA ·constants+0xd0(SB)/8, $0x4ed8aa4a391c0cb3
+DATA ·constants+0xd8(SB)/8, $0x682e6ff35b9cca4f
+DATA ·constants+0xe0(SB)/8, $0x78a5636f748f82ee
+DATA ·constants+0xe8(SB)/8, $0x8cc7020884c87814
+DATA ·constants+0xf0(SB)/8, $0xa4506ceb90befffa
+DATA ·constants+0xf8(SB)/8, $0xc67178f2bef9a3f7
+
+GLOBL ·constants(SB), 8, $256
+