Re: My 66000 and High word facility

On 8/14/2024 5:43 PM, MitchAlsup1 wrote:

On Wed, 14 Aug 2024 10:15:58 +0000, BGB wrote:
 

On 8/13/2024 12:24 PM, MitchAlsup1 wrote:
>
Assuming I use all of the ISA features that currently exist:
>
r8_erf:                                 ; @r8_erf
      MOV     R4, R1
      FABS    R1,R2
      FCMPGT  0x3780, R2  //Half
      BF      .LBB141_5
>
      FCMPGT  0x4400, R2  //Half
      BF      .LBB141_6
>
      FCMPGE  0x403A8B020C49BA5E, R2
      BT      .LBB141_7
>
      FMUL    R1, R1, R3
      FLDCH   0x3C00, R2
      FDIV    R2, R3, R3
      MOV     0x3F90B4FB18B485C7, R4
      MOV     0x3FD38A78B9F065F6, R16
      FMAC    R3, R16, R4, R4
      FADD    R3, 0x40048C54508800DB, R5
>
      MOV     0x3FD70FE40E2425B8, R16
      FMAC    R3, R16, R4, R4
>
      MOV     0x3FFDF79D6855F0AD, R16
      FMAC    R3, R16, R5, R5
>
      MOV     0x3FC0199D980A842F, R16
      FMAC    R3, R16, R4, R4
      MOV     0x3FE0E4993E122C39, R16
      FMAC    R3, R16, R5, R5
      MOV     0x3F9078448CD6C5B5, R16
      FMAC    R3, R16, R4, R4
      MOV     0x3FAEFC42917D7DE7, R16
      FMAC    R3, R16, R5, R5
      MOV     0x3F4595FD0D71E33C, R16
      FMAC    R3, R16, R4, R4
>
      FMUL    R4,R3,R4
      MOV     0x3F632147A014BAD1, R16
      FMAC    R5, R3, R16, R3
      FDIV    R4, R3, R3
      FNEG    R3, R3
      FADD    R3, 0x3FE20DD750429B6D, R3
      FDIV    R3, R2, R3
      BRA     .LBB141_4
LBB141_5:
      FMUL    R1, R1, R3
      MOV     0, R4
      FCMPGT  0x3C9FFE5AB7E8AD5E, R2
      CSELT   R3, R4, R2
      MOV     0x3FC7C7905A31C322, R3
>
      MOV     0x400949FB3ED443E9, R16
      fmac    R2, R16, R3, R3
      FADD    R2,#0x403799EE342FB2DE, R4
>
      MOV     0x405C774E4D365DA3, R16
      RMAC    R2, R16, R3, R3
      MOV     0x406E80C9D57E55B8, R16
      FMAC    R2, R16, R4, R4
>
      MOV     0x407797C38897528B, R16
      FMAC    R2, R16, R3, R3
      MOV     0x40940A77529CADC8, R16
      FMAC    R2, R16, R4, R4
      MOV     0x40A912C1535D121A, R16
      FMAC    R2, R16, R3, R3
>
      FMUL    R3, R1, R1
      MOV     0x40A63879423B87AD, R16
      FMAC    R2, R16, R4, R2
      FDIV    R1, R2, R2
      RTS
>
LBB141_6:
      MOV     0x3E571E703C5F5815, R3
      fmac    r3,r2,r3,#0x3FE20DD508EB103E
      fadd    r4,r2,#0x402F7D66F486DED5
      fmac    r3,r2,r3,#0x4021C42C35B8BC02
      fmac    r4,r2,r4,#0x405D6C69B0FFCDE7
      fmac    r3,r2,r3,#0x405087A0D1C420D0
      fmac    r4,r2,r4,#0x4080C972E588749E
      fmac    r3,r2,r3,#0x4072AA2986ABA462
      fmac    r4,r2,r4,#0x4099558EECA29D27
      fmac    r3,r2,r3,#0x408B8F9E262B9FA3
      fmac    r4,r2,r4,#0x40A9B599356D1202
      fmac    r3,r2,r3,#0x409AC030C15DC8D7
      fmac    r4,r2,r4,#0x40B10A9E7CB10E86
      fmac    r3,r2,r3,#0x40A0062821236F6B
      fmac    r4,r2,r4,#0x40AADEBC3FC90DBD
      fmac    r3,r2,r3,#0x4093395B7FD2FC8E
      fmac    r4,r2,r4,#0x4093395B7FD35F61
      fdiv    r3,r3,r4
LBB141_4:
      FMUL    R2, 0x40300000, R4
      FMUL    R4, 0x3FB00000, R4
      FSTCI   R4, R4
      FLDCI   R4, R4
      FNEG    R4, R6
      fadd    R2, R6, R5
      fadd    R2, R4, R2
      fmul    R4, R6, R4
      fexp    r4,r4  //?
>
      fmul    R2,R7, R2
      fexp    r2,r2
      fmul    R4, R2, R2
      FNEG    R2, R2
      fmac    r2,r2,r3,#0x3F000000
      fadd    r2,r2,#0x3F000000
      pdlt    r1,T  //?
      fadd    r2,#0,-r2
      RTS
LBB141_7:
      FLDCH    0xBC00, R2
      FLDCH    0x3C00, R3
      FCMPGT    0, R1
      CSELT    R2,R3,R2
      RTS
>

Not bad: I count 101 instructions and 183 words of memory.
{{I checked nothing}}

I ran out of time (needed to go to sleep) and didn't finish translation, so the lower-case instructions were still mostly untranslated...
But, either way, apart from the FMAC situation there wasn't too much increase in the parts I did get translated. In theory, I could define an encoding for an Imm32f or Imm64 FMAC (although likely limited to 3R, unless I do something weird and define an "FE FF Op" 4RI Imm32 encoding scheme or similar).
Otherwise, I have needed to order a new SSD as the SSD holding my main OS drive seems to be failing (it is occasionally getting "stuck" at 100% activity for extended periods of time, starting just recently, but not a good sign).
I have had to reboot my PC several times as it "got stuck" and didn't come unstuck.
Granted, I think I have been using the same SSD now for around a decade, and these these things do have a finite lifespan. Got a new one the same size as the old one, and intend to try to image it; could have gotten a bigger one, but this drive uses MBR partitioning and all 4 partitions are already used. Can't change to GPR as the OS installation is using "Legacy BIOS" booting.
Bigger SSD/... would effectively require a new OS install (even if it would be nice to make the OS drive bigger; Win10 isn't really wanting to fit that well on a 300 GB partition).
Basically, PC is a "ship of Theseus" in some ways...
...