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https://github.com/ZDoom/gzdoom.git
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150 lines
2.9 KiB
NASM
150 lines
2.9 KiB
NASM
%ifnidn __OUTPUT_FORMAT__,win64
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%error tmap3.asm is for Win64 output. You should use tmap.s for other systems.
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%endif
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BITS 64
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DEFAULT REL
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EXTERN vplce
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EXTERN vince
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EXTERN palookupoffse
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EXTERN bufplce
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EXTERN dc_count
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EXTERN dc_dest
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EXTERN dc_pitch
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SECTION .text
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GLOBAL ASM_PatchPitch
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ASM_PatchPitch:
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mov ecx, [dc_pitch]
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mov [pm+3], ecx
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mov [vltpitch+3], ecx
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ret
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align 16
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GLOBAL setupvlinetallasm
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setupvlinetallasm:
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mov [shifter1+2], cl
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mov [shifter2+2], cl
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mov [shifter3+2], cl
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mov [shifter4+2], cl
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ret
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align 16
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; Yasm can't do progbits alloc exec for win64?
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; Hmm, looks like it's automatic. No worries, then.
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SECTION .rtext write ;progbits alloc exec
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GLOBAL vlinetallasm4
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PROC_FRAME vlinetallasm4
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rex_push_reg rbx
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push_reg rdi
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push_reg r15
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push_reg r14
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push_reg r13
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push_reg r12
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push_reg rbp
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push_reg rsi
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alloc_stack 8 ; Stack must be 16-byte aligned
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END_PROLOGUE
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; rax = bufplce base address
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; rbx =
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; rcx = offset from rdi/count (negative)
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; edx/rdx = scratch
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; rdi = bottom of columns to write to
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; r8d-r11d = column offsets
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; r12-r15 = palookupoffse[0] - palookupoffse[4]
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mov ecx, [dc_count]
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mov rdi, [dc_dest]
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test ecx, ecx
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jle vltepilog ; count must be positive
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mov rax, [bufplce]
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mov r8, [bufplce+8]
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sub r8, rax
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mov r9, [bufplce+16]
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sub r9, rax
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mov r10, [bufplce+24]
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sub r10, rax
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mov [source2+4], r8d
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mov [source3+4], r9d
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mov [source4+4], r10d
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pm: imul rcx, 320
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mov r12, [palookupoffse]
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mov r13, [palookupoffse+8]
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mov r14, [palookupoffse+16]
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mov r15, [palookupoffse+24]
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mov r8d, [vince]
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mov r9d, [vince+4]
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mov r10d, [vince+8]
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mov r11d, [vince+12]
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mov [step1+3], r8d
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mov [step2+3], r9d
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mov [step3+3], r10d
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mov [step4+3], r11d
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add rdi, rcx
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neg rcx
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mov r8d, [vplce]
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mov r9d, [vplce+4]
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mov r10d, [vplce+8]
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mov r11d, [vplce+12]
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jmp loopit
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ALIGN 16
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loopit:
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mov edx, r8d
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shifter1: shr edx, 24
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step1: add r8d, 0x88888888
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movzx edx, BYTE [rax+rdx]
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mov ebx, r9d
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mov dl, [r12+rdx]
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shifter2: shr ebx, 24
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step2: add r9d, 0x88888888
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source2: movzx ebx, BYTE [rax+rbx+0x88888888]
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mov ebp, r10d
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mov bl, [r13+rbx]
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shifter3: shr ebp, 24
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step3: add r10d, 0x88888888
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source3: movzx ebp, BYTE [rax+rbp+0x88888888]
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mov esi, r11d
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mov bpl, BYTE [r14+rbp]
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shifter4: shr esi, 24
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step4: add r11d, 0x88888888
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source4: movzx esi, BYTE [rax+rsi+0x88888888]
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mov [rdi+rcx], dl
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mov [rdi+rcx+1], bl
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mov sil, BYTE [r15+rsi]
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mov [rdi+rcx+2], bpl
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mov [rdi+rcx+3], sil
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vltpitch: add rcx, 320
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jl loopit
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mov [vplce], r8d
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mov [vplce+4], r9d
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mov [vplce+8], r10d
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mov [vplce+12], r11d
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vltepilog:
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add rsp, 8
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pop rsi
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pop rbp
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pop r12
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pop r13
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pop r14
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pop r15
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pop rdi
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pop rbx
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ret
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vlinetallasm4_end:
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ENDPROC_FRAME
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ALIGN 16
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