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+ atomic operations for RV32

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This commit is contained in:
florian 2025-01-26 14:17:39 +01:00
parent 923ad699a1
commit cd76562339
3 changed files with 123 additions and 47 deletions
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21
rtl/riscv/riscv.inc
View File

@ -15,6 +15,10 @@
**********************************************************************}
{****************************************************************************
stack frame related stuff
****************************************************************************}
{$IFNDEF INTERNAL_BACKTRACE}
{$define FPC_SYSTEM_HAS_GET_FRAME}
function get_frame:pointer;assembler;nostackframe;
@ -197,3 +201,20 @@ procedure WriteBarrier; assembler; nostackframe;
asm
fence ow, ow
end;
{****************************************************************************
atomic operations
****************************************************************************}
{$define FPC_SYSTEM_HAS_DECLOCKED_LONGINT}
function declocked(var l: longint) : boolean; inline;
begin
Result:=InterLockedDecrement(l) = 0;
end;
{$define FPC_SYSTEM_HAS_INCLOCKED_LONGINT}
procedure inclocked(var l: longint); inline;
begin
InterLockedIncrement(l);
end;

129
rtl/riscv32/riscv32.inc
View File

@ -18,6 +18,9 @@
{ Common RiscV stuff }
{$I ../riscv/riscv.inc}
{****************************************************************************
stack frame related stuff
****************************************************************************}
{$define FPC_SYSTEM_HAS_GET_CALLER_ADDR}
function get_caller_addr(framebp:pointer;addr:pointer=nil):pointer;assembler;
@ -32,47 +35,109 @@ function get_caller_frame(framebp:pointer;addr:pointer=nil):pointer;assembler;
lw a0, -4*2(a0)
end;
{****************************************************************************
atomic operations
****************************************************************************}
{ while some of the functions below could be shared with RiscV 64, this makes no sense imo
to scatter those functions around }
{$ifdef VER3_2}
function InterLockedDecrement (var Target: longint) : longint;
begin
dec(Target);
Result:=Target;
function InterLockedDecrement (var Target: longint) : longint; assembler; nostackframe;
{$else VER3_2}
{$define FPC_SYSTEM_HAS_ATOMIC_DEC_32}
function fpc_atomic_dec_32 (var Target: longint) : longint; assembler; nostackframe;
{$endif VER3_2}
asm
{$ifdef CPURV_HAS_ATOMIC}
addi a1, x0, -1
amoadd.w a0, a1, (a0)
add a0, a0, a1
{$else CPURV_HAS_ATOMIC}
lw a1, 0(a0)
addi a1, a1, -1
sw a1, 0(a0)
addi a0, a1, 0
{$endif CPURV_HAS_ATOMIC}
end;
function InterLockedIncrement (var Target: longint) : longint;
begin
inc(Target);
Result:=Target;
end;
function InterLockedExchange (var Target: longint;Source : longint) : longint;
begin
Result:=Target;
Target:=Source;
end;
function InterLockedExchangeAdd (var Target: longint;Source : longint) : longint;
begin
Result:=Target;
inc(Target,Source);
end;
{$endif}
{$ifdef VER3_2}
function InterlockedCompareExchange(var Target: longint; NewValue: longint; Comperand: longint): longint;
function InterLockedIncrement (var Target: longint) : longint; assembler; nostackframe;
{$else VER3_2}
{$define FPC_SYSTEM_HAS_ATOMIC_INC_32}
function fpc_atomic_inc_32 (var Target: longint) : longint; assembler; nostackframe;
{$endif VER3_2}
asm
{$ifdef CPURV_HAS_ATOMIC}
addi a1, x0, 1
amoadd.w a0, a1, (a0)
add a0, a0, a1
{$else CPURV_HAS_ATOMIC}
lw a1, 0(a0)
addi a1, a1, 1
sw a1, 0(a0)
addi a0, a1, 0
{$endif CPURV_HAS_ATOMIC}
end;
{$ifdef VER3_2}
function InterLockedExchange (var Target: longint;Source : longint) : longint; assembler; nostackframe;
{$else VER3_2}
{$define FPC_SYSTEM_HAS_ATOMIC_XCHG_32}
function fpc_atomic_xchg_32 (var Target: longint;Source : longint) : longint; assembler; nostackframe;
{$endif VER3_2}
asm
{$ifdef CPURV_HAS_ATOMIC}
amoswap.w a0, a1, (a0)
{$else CPURV_HAS_ATOMIC}
lw a2, 0(a0)
sw a1, 0(a0)
addi a0, a2, 0
{$endif CPURV_HAS_ATOMIC}
end;
{$ifdef VER3_2}
function InterlockedCompareExchange(var Target: longint; NewValue: longint; Comperand: longint): longint; assembler; nostackframe;
{$else VER3_2}
{$define FPC_SYSTEM_HAS_ATOMIC_CMP_XCHG_32}
function fpc_atomic_cmp_xchg_32 (var Target: longint; NewValue: longint; Comparand: longint) : longint; [public,alias:'FPC_ATOMIC_CMP_XCHG_32'];
function fpc_atomic_cmp_xchg_32 (var Target: longint; NewValue: longint; Comparand: longint) : longint; [public,alias:'FPC_ATOMIC_CMP_XCHG_32']; assembler; nostackframe;
{$endif VER3_2}
begin
Result:=Target;
if Target={$ifdef VER3_2}Comperand{$else}Comparand{$endif} then
Target:=NewValue;
asm
{$ifdef CPURV_HAS_ATOMIC}
.LLoop:
lr.w a3, 0(a0)
bne a3, a2, .LFail
sc.w a4, a1, 0(a0)
bne a4, x0, .LLoop
.LFail:
addi a0, a3, 0
{$else CPURV_HAS_ATOMIC}
lw a3, 0(a0)
bne a3, a2, .LFail
sw a1, 0(a0)
.LFail:
addi a0, a3, 0
{$endif CPURV_HAS_ATOMIC}
end;
{$ifdef VER3_2}
function InterLockedExchangeAdd (var Target: longint;Source : longint) : longint; assembler; nostackframe;
{$else VER3_2}
{$define FPC_SYSTEM_HAS_ATOMIC_ADD_32}
function fpc_atomic_add_32 (var Target: longint;Value: longint) : longint; assembler; nostackframe;
{$endif VER3_2}
asm
{$ifdef CPURV_HAS_ATOMIC}
amoadd.w a0, a1, (a0)
{$else CPURV_HAS_ATOMIC}
lw a2, 0(a0)
add a2, a2, a1
sw a2, 0(a0)
addi a0, a2, 0
{$endif CPURV_HAS_ATOMIC}
end;

20
rtl/riscv64/riscv64.inc
View File

@ -18,6 +18,10 @@
{ Common RiscV stuff }
{$I ../riscv/riscv.inc}
{****************************************************************************
stack frame related stuff
****************************************************************************}
{$define FPC_SYSTEM_HAS_GET_CALLER_ADDR}
function get_caller_addr(framebp:pointer;addr:pointer=nil):pointer;assembler;
asm
@ -32,7 +36,7 @@ function get_caller_frame(framebp:pointer;addr:pointer=nil):pointer;assembler;
end;
{****************************************************************************
stack frame related stuff
atomic operations
****************************************************************************}
{$ifdef VER3_2}
@ -235,20 +239,6 @@ function fpc_atomic_add_64 (var Target: int64;Value : int64) : int64; assembler;
end;
{$define FPC_SYSTEM_HAS_DECLOCKED_LONGINT}
function declocked(var l: longint) : boolean; inline;
begin
Result:=InterLockedDecrement(l) = 0;
end;
{$define FPC_SYSTEM_HAS_INCLOCKED_LONGINT}
procedure inclocked(var l: longint); inline;
begin
InterLockedIncrement(l);
end;
{$define FPC_SYSTEM_HAS_DECLOCKED_INT64}
function declocked(var l:int64):boolean;
begin