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| author | ptitSeb <sebastien.chev@gmail.com> | 2025-03-17 15:40:20 +0100 |
|---|---|---|
| committer | ptitSeb <sebastien.chev@gmail.com> | 2025-03-17 15:40:20 +0100 |
| commit | 3336cb6248193ff93b25c2a2ef932e2ecb0a4ddf (patch) | |
| tree | f34dc3452e1b4105215de6b236272f8796ca4b4d /src | |
| parent | 7fa3a1e627fe815b05751c223f4923e0d34addd1 (diff) | |
| download | box64-3336cb6248193ff93b25c2a2ef932e2ecb0a4ddf.tar.gz box64-3336cb6248193ff93b25c2a2ef932e2ecb0a4ddf.zip | |
[ARM64_DYNAREC] Small optim on special case of LOCK OR [RSP], 0
Diffstat (limited to 'src')
| -rw-r--r-- | src/dynarec/arm64/dynarec_arm64_f0.c | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/src/dynarec/arm64/dynarec_arm64_f0.c b/src/dynarec/arm64/dynarec_arm64_f0.c index d65bc551..d5a81fef 100644 --- a/src/dynarec/arm64/dynarec_arm64_f0.c +++ b/src/dynarec/arm64/dynarec_arm64_f0.c @@ -375,7 +375,6 @@ uintptr_t dynarec64_F0(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin // EAX == Ed STLXRxw(x4, gd, wback); CBNZx_MARKLOCK(x4); - SMDMB(); // done if(!ALIGNED_ATOMICxw) { B_MARK_nocond; @@ -394,9 +393,9 @@ uintptr_t dynarec64_F0(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin STLXRB(x4, gd, wback); CBNZx_MARK3(x4); STRxw_U12(gd, wback, 0); - SMDMB(); } MARK; + SMDMB(); // Common part (and fallback for EAX != Ed) UFLAG_IF {emit_cmp32(dyn, ninst, rex, xRAX, x1, x3, x4, x5); MOVxw_REG(xRAX, x1);} else { @@ -1368,22 +1367,27 @@ uintptr_t dynarec64_F0(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin } else { addr = geted(dyn, addr, ninst, nextop, &wback, x2, &fixedaddress, NULL, 0, 0, rex, LOCK_LOCK, 0, (opcode==0x81)?4:1); if(opcode==0x81) i64 = F32S; else i64 = F8S; - if(arm64_atomics) { - MOV64xw(x5, i64); - UFLAG_IF { - LDSETALxw(x5, x1, wback); - emit_or32(dyn, ninst, rex, x1, x5, x3, x4); + if(wback==xRSP && !i64) { + // this is __faststorefence + DMB_ST(); + } else { + if(arm64_atomics) { + MOV64xw(x5, i64); + UFLAG_IF { + LDSETALxw(x5, x1, wback); + emit_or32(dyn, ninst, rex, x1, x5, x3, x4); + } else { + STSETLxw(x5, wback); + } } else { - STSETLxw(x5, wback); + MARKLOCK; + LDAXRxw(x1, wback); + emit_or32c(dyn, ninst, rex, x1, i64, x3, x4); + STLXRxw(x3, x1, wback); + CBNZx_MARKLOCK(x3); } - } else { - MARKLOCK; - LDAXRxw(x1, wback); - emit_or32c(dyn, ninst, rex, x1, i64, x3, x4); - STLXRxw(x3, x1, wback); - CBNZx_MARKLOCK(x3); + SMDMB(); } - SMDMB(); } break; case 2: //ADC |