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| author | ptitSeb <sebastien.chev@gmail.com> | 2024-05-15 12:32:44 +0200 |
|---|---|---|
| committer | ptitSeb <sebastien.chev@gmail.com> | 2024-05-15 12:32:44 +0200 |
| commit | 50325785f54ad0a4327ae905957e2f90c557bafd (patch) | |
| tree | ce5d1286aead577311709e9d54633d91ef8a5875 /src | |
| parent | ef49b97c7535ba22883f4f9116b2d3b2c7414d52 (diff) | |
| download | box64-50325785f54ad0a4327ae905957e2f90c557bafd.tar.gz box64-50325785f54ad0a4327ae905957e2f90c557bafd.zip | |
[ARM64_DYNAREC] Small optim of 0F B1 opcode
Diffstat (limited to 'src')
| -rw-r--r-- | src/dynarec/arm64/dynarec_arm64_0f.c | 54 |
1 files changed, 25 insertions, 29 deletions
diff --git a/src/dynarec/arm64/dynarec_arm64_0f.c b/src/dynarec/arm64/dynarec_arm64_0f.c index 82669dcc..8f6a46e9 100644 --- a/src/dynarec/arm64/dynarec_arm64_0f.c +++ b/src/dynarec/arm64/dynarec_arm64_0f.c @@ -1887,35 +1887,31 @@ uintptr_t dynarec64_0F(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin } break; - case 0xB1: - // rep has no impact on this opcode - INST_NAME("CMPXCHG Ed, Gd"); - SETFLAGS(X_ALL, SF_SET_PENDING); - nextop = F8; - GETGD; - if(MODREG) { - ed = xRAX+(nextop&7)+(rex.b<<3); - wback = 0; - UFLAG_IF {emit_cmp32(dyn, ninst, rex, xRAX, ed, x3, x4, x5);} - MOVxw_REG(x1, ed); // save value - CMPSxw_REG(xRAX, x1); - B_MARK2(cNE); - MOVxw_REG(ed, gd); - MARK2; - MOVxw_REG(xRAX, x1); - B_NEXT_nocond; - } else { - addr = geted(dyn, addr, ninst, nextop, &wback, x2, &fixedaddress, &unscaled, 0xfff<<(2+rex.w), (1<<(2+rex.w))-1, rex, NULL, 0, 0); - LDxw(x1, wback, fixedaddress); - CMPSxw_REG(xRAX, x1); - B_MARK(cNE); - // EAX == Ed - STxw(gd, wback, fixedaddress); - MARK; - UFLAG_IF {emit_cmp32(dyn, ninst, rex, xRAX, x1, x3, x4, x5);} - MOVxw_REG(xRAX, x1); // upper par of RAX will be erase on 32bits, no mater what - } - break; + case 0xB1: + // rep has no impact on this opcode + INST_NAME("CMPXCHG Ed, Gd"); + SETFLAGS(X_ALL, SF_SET_PENDING); + nextop = F8; + GETGD; + if(MODREG) { + ed = xRAX+(nextop&7)+(rex.b<<3); + wback = 0; + UFLAG_IF {emit_cmp32(dyn, ninst, rex, xRAX, ed, x3, x4, x5);} + MOVxw_REG(x1, ed); // save value + CMPSxw_REG(xRAX, x1); + CSELxw(ed, gd, ed, cEQ); + } else { + addr = geted(dyn, addr, ninst, nextop, &wback, x2, &fixedaddress, &unscaled, 0xfff<<(2+rex.w), (1<<(2+rex.w))-1, rex, NULL, 0, 0); + LDxw(x1, wback, fixedaddress); + UFLAG_IF {emit_cmp32(dyn, ninst, rex, xRAX, x1, x3, x4, x5);} + CMPSxw_REG(xRAX, x1); + B_MARK(cNE); + // EAX == Ed + STxw(gd, wback, fixedaddress); + MARK; + } + MOVxw_REG(xRAX, x1); // upper part of RAX will be erase on 32bits, no mater what + break; case 0xB3: INST_NAME("BTR Ed, Gd"); |