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Optimizations to reduce code size under 32K

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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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src/executeProgram-win64.asm
+22 -23
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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