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RandomWOW
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Optimizations to reduce code size under 32K

This commit is contained in:
tevador 2019-01-08 14:50:31 +01:00
parent b6d654291f
commit b71e0eec65
4 changed files with 1252 additions and 1633 deletions
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32
src/AssemblyGeneratorX86.cpp
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@ -28,9 +28,10 @@ namespace RandomX {
static const char* regR32[8] = { "r8d", "r9d", "r10d", "r11d", "r12d", "r13d", "r14d", "r15d" };
static const char* regF[8] = { "xmm8", "xmm9", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7" };
static const char* regMx = "rdi";
static const char* regIc = "ebp";
static const char* regStackBeginAddr = "rbx";
static const char* regMx = "rbp";
static const char* regIc = "ebx";
static const char* regIc8 = "bl";
static const char* regStackBeginAddr = "rdi";
static const char* regScratchpadAddr = "rsi";
void AssemblyGeneratorX86::generateProgram(const void* seed) {
@ -62,7 +63,7 @@ namespace RandomX {
void AssemblyGeneratorX86::genar(Instruction& instr, int i) {
asmCode << "\txor " << regR[instr.rega % RegistersCount] << ", 0" << std::hex << instr.addra << "h" << std::dec << std::endl;
asmCode << "\tmov ecx, " << regR32[instr.rega % RegistersCount] << std::endl;
asmCode << "\ttest " << regIc << ", 63" << std::endl;
asmCode << "\ttest " << regIc8 << ", 63" << std::endl;
asmCode << "\tjnz short rx_body_" << i << std::endl;
switch (instr.loca & 3)
{
@ -71,13 +72,15 @@ namespace RandomX {
case 2:
asmCode << "\tcall rx_read_l1" << std::endl;
asmCode << "rx_body_" << i << ":" << std::endl;
asmCode << "\txor " << regMx << ", rcx" << std::endl;
if ((instr.loca & 192) == 0)
asmCode << "\txor " << regMx << ", rcx" << std::endl;
asmCode << "\tand ecx, " << (ScratchpadL1 - 1) << std::endl;
break;
default: //3
asmCode << "\tcall rx_read_l2" << std::endl;
asmCode << "rx_body_" << i << ":" << std::endl;
asmCode << "\txor " << regMx << ", rcx" << std::endl;
if ((instr.loca & 192) == 0)
asmCode << "\txor " << regMx << ", rcx" << std::endl;
asmCode << "\tand ecx, " << (ScratchpadL2 - 1) << std::endl;
break;
}
@ -88,7 +91,7 @@ namespace RandomX {
void AssemblyGeneratorX86::genaf(Instruction& instr, int i) {
asmCode << "\txor " << regR[instr.rega % RegistersCount] << ", 0" << std::hex << instr.addra << "h" << std::dec << std::endl;
asmCode << "\tmov ecx, " << regR32[instr.rega % RegistersCount] << std::endl;
asmCode << "\ttest " << regIc << ", 63" << std::endl;
asmCode << "\ttest " << regIc8 << ", 63" << std::endl;
asmCode << "\tjnz short rx_body_" << i << std::endl;
switch (instr.loca & 3)
{
@ -97,13 +100,15 @@ namespace RandomX {
case 2:
asmCode << "\tcall rx_read_l1" << std::endl;
asmCode << "rx_body_" << i << ":" << std::endl;
asmCode << "\txor " << regMx << ", rcx" << std::endl;
if((instr.loca & 192) == 0)
asmCode << "\txor " << regMx << ", rcx" << std::endl;
asmCode << "\tand ecx, " << (ScratchpadL1 - 1) << std::endl;
break;
default: //3
asmCode << "\tcall rx_read_l2" << std::endl;
asmCode << "rx_body_" << i << ":" << std::endl;
asmCode << "\txor " << regMx << ", rcx" << std::endl;
if ((instr.loca & 192) == 0)
asmCode << "\txor " << regMx << ", rcx" << std::endl;
asmCode << "\tand ecx, " << (ScratchpadL2 - 1) << std::endl;
break;
}
@ -200,8 +205,9 @@ namespace RandomX {
}
}
void AssemblyGeneratorX86::gencf(Instruction& instr) {
asmCode << "\tmovaps " << regF[instr.regc % RegistersCount] << ", xmm0" << std::endl;
void AssemblyGeneratorX86::gencf(Instruction& instr, bool move = true) {
if(move)
asmCode << "\tmovaps " << regF[instr.regc % RegistersCount] << ", xmm0" << std::endl;
const char* store = (instr.locc & 8) ? "movhpd" : "movlpd";
switch (instr.locc & 7)
{
@ -451,8 +457,8 @@ namespace RandomX {
void AssemblyGeneratorX86::h_FPSQRT(Instruction& instr, int i) {
genaf(instr, i);
asmCode << "\tandps xmm0, xmm10" << std::endl;
asmCode << "\tsqrtpd xmm0, xmm0" << std::endl;
gencf(instr);
asmCode << "\tsqrtpd " << regF[instr.regc % RegistersCount] << ", xmm0" << std::endl;
gencf(instr, false);
}
void AssemblyGeneratorX86::h_FPROUND(Instruction& instr, int i) {

2
src/AssemblyGeneratorX86.hpp
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@ -45,7 +45,7 @@ namespace RandomX {
void genbr132(Instruction&);
void genbf(Instruction&, const char*);
void gencr(Instruction&);
void gencf(Instruction&);
void gencf(Instruction&, bool);
void generateCode(Instruction&, int);

45
src/executeProgram-win64.asm
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@ -22,12 +22,12 @@ PUBLIC executeProgram
executeProgram PROC
; REGISTER ALLOCATION:
; rax -> temporary
; rbx -> beginning of VM stack
; rbx -> "ic"
; rcx -> temporary
; rdx -> temporary
; rsi -> convertible_t& scratchpad
; rdi -> "mx"
; rbp -> "ic"
; rdi -> beginning of VM stack
; rbp -> "ma", "mx"
; rsp -> end of VM stack
; r8 -> "r0"
; r9 -> "r1"
@ -82,13 +82,13 @@ executeProgram PROC
; function arguments
push rcx ; RegisterFile& registerFile
mov rdi, qword ptr [rdx] ; "mx", "ma"
mov rbp, qword ptr [rdx] ; "mx", "ma"
mov rax, qword ptr [rdx+8] ; uint8_t* dataset
push rax
mov rsi, r8 ; convertible_t* scratchpad
mov rbx, rsp ; beginning of VM stack
mov ebp, 1048577 ; number of VM instructions to execute + 1
mov rdi, rsp ; beginning of VM stack
mov ebx, 1048577 ; number of VM instructions to execute + 1
xorps xmm10, xmm10
cmpeqpd xmm10, xmm10
@ -164,7 +164,7 @@ executeProgram PROC
rx_finish:
; unroll the stack
mov rsp, rbx
mov rsp, rdi
; save VM register values
pop rcx
@ -211,30 +211,29 @@ TransformAddress MACRO reg32, reg64
;# lies in a different cache line than the original address (mod 2^N).
;# This is done to prevent a load-store dependency.
;# There are 3 different transformations that can be used: x -> 9*x+C, x -> x+C, x -> x^C
lea reg32, [reg64+reg64*8+127] ;# C = -119 -110 -101 -92 -83 -74 -65 -55 -46 -37 -28 -19 -10 -1 9 18 27 36 45 54 63 73 82 91 100 109 118 127
;lea reg32, [reg64-128] ;# C = all except -7 to +7
;xor reg32, -8 ;# C = all except 0 to 7
;lea reg32, [reg64+reg64*8+127] ;# C = -119 -110 -101 -92 -83 -74 -65 -55 -46 -37 -28 -19 -10 -1 9 18 27 36 45 54 63 73 82 91 100 109 118 127
db 64
add reg32, -39 ;# C = all except -7 to +7
;xor reg32, -8 ;# C = all except 0 to 7
ENDM
ReadMemoryRandom MACRO spmask
;# IN ecx = random 32-bit address
;# OUT rax = 64-bit integer return value
;# OUT xmm0 = 128-bit floating point return value
;# GLOBAL rbp = "ic" number of instructions until the end of the program
;# GLOBAL rbx = address of the dataset address
;# GLOBAL rdi = address of the dataset address
;# GLOBAL rsi = address of the scratchpad
;# GLOBAL rdi = low 32 bits = "mx", high 32 bits = "ma"
;# GLOBAL rbp = low 32 bits = "mx", high 32 bits = "ma"
;# MODIFY rcx, rdx
push rcx ;# preserve ecx
TransformAddress ecx, rcx ;# TransformAddress function
mov rax, qword ptr [rdi] ;# load the dataset address
xor rbp, rcx ;# modify "mx"
; prefetch cacheline "mx"
mov rax, qword ptr [rbx] ;# load the dataset address
and rdi, -64 ;# align "mx" to the start of a cache line
mov edx, edi ;# edx = mx
and rbp, -64 ;# align "mx" to the start of a cache line
mov edx, ebp ;# edx = mx
prefetchnta byte ptr [rax+rdx]
; read cacheline "ma"
ror rdi, 32 ;# swap "ma" and "mx"
mov edx, edi ;# edx = ma
push rcx
TransformAddress ecx, rcx ;# TransformAddress function
ror rbp, 32 ;# swap "ma" and "mx"
mov edx, ebp ;# edx = ma
and ecx, spmask-7 ;# limit address to the specified scratchpad size aligned to multiple of 8
lea rcx, [rsi+rcx*8] ;# scratchpad cache line
lea rax, [rax+rdx] ;# dataset cache line
@ -254,7 +253,7 @@ ReadMemoryRandom MACRO spmask
xor qword ptr [rcx+48], rdx
mov rdx, qword ptr [rax+56]
xor qword ptr [rcx+56], rdx
pop rcx
pop rcx ;# restore ecx
ret
ENDM

2806
src/program.inc
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