LARCH64 dynarec

[factfinding]

• [LARCH64_DYNAREC] Pushed the la464_lock.h
• [LARCH64_DYNAREC] Add initial support for atomic functions
• [LARCH64_DYNAREC] Added some basic infrastructure for the Dynarec (and 1 opcode)
• [LARCH64_DYNAREC] Add a disassembler for LA464 instructions
• [LARCH64_DYNAREC] Added 86 MOV opcode, and some fixes too
• [LARCH64_DYNAREC] Added 8D LEA opcode
• [LARCH64_DYNAREC] Added POP reg opcode
• [LARCH64_DYNAREC] Various fixes and small optims

[ptitSeb]

Oh, that's a surprise! Nice work there.

I had also thought about the la464 dynarec, and end up with a slightly different mapping for the registers:

/*
 LA464 GPR mapping
 There is no 15 registers free, so split the regs in 2 part
 AX..DI : r12-r19
 R8..R15: r23-r30
 flags in r31
 ip in r20
*/
// x86 Register mapping
#define xRAX    12
#define xRCX    13
#define xRDX    14
#define xRBX    15
#define xRSP    16
#define xRBP    17
#define xRSI    18
#define xRDI    19
#define xR8     23
#define xR9     24
#define xR10    25
#define xR11    26
#define xR12    27
#define xR13    28
#define xR14    29
#define xR15    30
#define xFlags  31
#define xRIP    20
// function to move from x86 regs number to LA464 reg number
#define TO_LA464(A) ((A)>7)?((A)+15):((A)+12)
// function to move from LA464 regs number to x86 reg number
#define FROM_LA464(A) ((A)>22)?((A)-15):((A)-12)
// 32bits version
#define wEAX    xRAX
#define wECX    xRCX
#define wEDX    xRDX
#define wEBX    xRBX
#define wESP    xRSP
#define wEBP    xRBP
#define wESI    xRSI
#define wEDI    xRDI
#define wR8     xR8
#define wR9     xR9
#define wR10    xR10
#define wR11    xR11
#define wR12    xR12
#define wR13    xR13
#define wR14    xR14
#define wR15    xR15
#define wFlags  xFlags
// scratch registers
#define x1      5
#define x2      6
#define x3      7
#define x4      8
#define x5      9
#define x6      10
// 32bits version of scratch
#define w1      x1
#define w2      x2
#define w3      x3
#define w4      x4
#define w5      x5
#define w6      x6
// emu is r0
#define xEmu    4
// LA464 RA
#define xRA     1
#define ra      xRA
// LA464 SP
#define xSP     3
// xZR regs
#define xZR     0
#define wZR     xZR
#define r0      xZR

Do you think you can adapt your PR to that (or maybe you have some objection to this mapping?)

[factfinding]

Ok, I will do that.

[ksco]

Happy to see some progress on the Loongarch Dynarec! I have a 3A6000 board and am willing to make some contributions there. Cheers.