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armFish/guts/Gen_Captures.c

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+Gen_Captures:
+        brk  0
+/*
+	; in rbp address of position
+	;    rbx address of state
+	; io rdi address to write moves
+
+	       push   rsi r12 r13 r14 r15
+		mov   r14, qword[rbp+Pos.typeBB+8*White]
+		 or   r14, qword[rbp+Pos.typeBB+8*Black]
+		cmp   byte[rbp+Pos.sideToMove],0
+		jne   Gen_Captures_Black
+Gen_Captures_White:
+		mov   r15, qword[rbp+Pos.typeBB+8*Black]
+       generate_all   White, CAPTURES
+		pop   r15 r14 r13 r12 rsi
+		ret
+       generate_jmp  White, CAPTURES
+
+Gen_Captures_Black:
+		mov   r15, qword[rbp+Pos.typeBB+8*White]
+       generate_all   Black, CAPTURES
+		pop   r15 r14 r13 r12 rsi
+		ret
+       generate_jmp   Black, CAPTURES
+*/

armFish/guts/Gen_Evasions.c

@@ -0,0 +1,89 @@
+
+Gen_Evasions:
+        brk  0
+/*
+	; in rbp address of position
+	;    rbx address of state
+	; io rdi address to write moves
+
+	       push   rsi r12 r13 r14 r15
+		mov   r13d, dword[rbp+Pos.sideToMove]
+
+; r14 = our king square
+		mov   r14, qword[rbp+Pos.typeBB+8*King]
+		and   r14, qword[rbp+Pos.typeBB+8*r13]
+		bsf   r14, r14
+
+; rsi = their sliding checkers
+		mov   rsi, qword[rbp+Pos.typeBB+8*Pawn]
+		 or   rsi, qword[rbp+Pos.typeBB+8*Knight]
+	       andn   rsi, rsi, qword[rbx+State.checkersBB]
+
+; r12 = sliderAttacks
+		mov   r9, r14
+		shl   r9, 6+3
+		xor   r12, r12
+		bsf   rdx, rsi
+		 jz   .SlidersDone
+*/
+Gen_Evasions.NextSlider:
+/*
+	       blsr   rsi, rsi, r8
+		mov   rax, [LineBB+r9+8*rdx]
+		btr   rax, rdx
+		 or   r12, rax
+		bsf   rdx, rsi
+		jnz   .NextSlider
+*/
+Gen_Evasions.SlidersDone:
+/*
+; generate moves for the king to safe squares
+		mov   rsi, qword[rbp+Pos.typeBB+8*r13]
+	       andn   rsi, rsi, qword[KingAttacks+8*r14]
+	       andn   r12, r12, rsi
+		shl   r14d, 6
+		bsf   rax, r12
+		 jz   .KingMoveDone
+*/
+Gen_Evasions.NextKingMove:
+/*
+	       blsr   r12, r12, r8
+		 or   eax, r14d
+		mov   dword [rdi], eax
+		lea   rdi, [rdi+sizeof.ExtMove]
+		bsf   rax, r12
+		jnz   .NextKingMove
+*/
+Gen_Evasions.KingMoveDone:
+/*
+; if there are multiple checkers, only king moves can be evasions
+		mov   rcx, qword[rbx+State.checkersBB]
+	       blsr   rax, rcx
+		jnz   Gen_Evasions_White.Ret
+		bsf   rax, rcx
+		mov   r15, qword[BetweenBB+r9+8*rax]
+		 or   r15, rcx
+
+		mov   r14, qword[rbp+Pos.typeBB+8*White]
+		 or   r14, qword[rbp+Pos.typeBB+8*Black]
+	       test   r13d,r13d
+		jnz   Gen_Evasions_Black
+*/
+Gen_Evasions_White:
+/*
+       generate_all   White, EVASIONS
+*/
+Gen_Evasions_White.Ret:
+/*
+                pop   r15 r14 r13 r12 rsi
+		ret
+       generate_jmp   White, EVASIONS
+*/
+Gen_Evasions_Black:
+/*
+       generate_all   Black, EVASIONS
+		pop   r15 r14 r13 r12 rsi
+		ret
+       generate_jmp   Black, EVASIONS
+*/
+