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Merge pull request #178 from wowario/cnr

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CryptonightR Fixes
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jw 2019-02-10 08:41:24 -08:00 committed by GitHub
commit c40ab9b5be
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 2 deletions
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11
src/crypto/variant4_random_math.h
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@ -24,7 +24,7 @@ enum V4_Settings
enum V4_InstructionList
{
MUL, // a*b
ADD, // a+b + C, -128 <= C <= 127
ADD, // a+b + C, C is an unsigned 32-bit constant
SUB, // a-b
ROR, // rotate right "a" by "b & 31" bits
ROL, // rotate left "a" by "b & 31" bits
@ -215,7 +215,7 @@ static inline int v4_random_math_init(struct V4_Instruction* code, const uint64_
//
// Registers R4-R7 are constant and are treated as having the same value because when we do
// the same operation twice with two constant source registers, it can be optimized into a single operation
int inst_data[8] = { 0, 1, 2, 3, -1, -1, -1, -1 };
uint32_t inst_data[8] = { 0, 1, 2, 3, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF };
bool alu_busy[TOTAL_LATENCY + 1][ALU_COUNT];
bool is_rotation[V4_INSTRUCTION_COUNT];
@ -233,10 +233,17 @@ static inline int v4_random_math_init(struct V4_Instruction* code, const uint64_
int num_retries = 0;
code_size = 0;
int total_iterations = 0;
// Generate random code to achieve minimal required latency for our abstract CPU
// Try to get this latency for all 4 registers
while (((latency[0] < TOTAL_LATENCY) || (latency[1] < TOTAL_LATENCY) || (latency[2] < TOTAL_LATENCY) || (latency[3] < TOTAL_LATENCY)) && (num_retries < 64))
{
// Fail-safe to guarantee loop termination
++total_iterations;
if (total_iterations > 256)
break;
check_data(&data_index, 1, data, sizeof(data));
const uint8_t c = ((uint8_t*)data)[data_index++];