From 4c90390a786b738c0dc0b8d55e7cc2d857f625de Mon Sep 17 00:00:00 2001
From: Joshua Wise <joshua@rebirth.joshuawise.com>
Date: Thu, 22 May 2008 00:26:44 -0400
Subject: [PATCH] fix tests 9 and 10

---
 broken-tests             |  7 -------
 core/insn_add_hl.v       |  2 +-
 core/insn_add_sp_imm8.v  | 10 +++++++++-
 core/insn_ldhl_sp_imm8.v | 10 +++++++++-
 4 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/broken-tests b/broken-tests
index 31f155e..5ef0ec7 100644
--- a/broken-tests
+++ b/broken-tests
@@ -17,12 +17,5 @@ TEST 07: Immediate insns
 TEST 08: Register insns
 
 TEST 09: BC/DE/HL arith
-09 (ADD HL, BC)
-19 (ADD HL, DE)
 
 TEST 10: SP/HL instructions
-39 (ADD HL, SP)
-E8 01 (ADD SP, 1)
-E8 FF (ADD SP, -1)
-F8 01 (LD HL, SP+1)
-F8 FF (LD HL, SP-1)
\ No newline at end of file
diff --git a/core/insn_add_hl.v b/core/insn_add_hl.v
index 6bd7e7a..66a047f 100644
--- a/core/insn_add_hl.v
+++ b/core/insn_add_hl.v
@@ -23,7 +23,7 @@
 		1:	begin
 				`_F <=	{ /* Z */ `_F[7],
 					  /* N */ 1'b0,
-					  /* H */ (({`_HL} + {tmp,tmp2}) & 16'h1000) ? 1'b1 : 1'b0,
+					  /* H */ (({1'b0,`_H[3:0],`_L} + {1'b0,tmp[3:0],tmp2}) & 13'h1000) ? 1'b1 : 1'b0,
 					  /* C */ (({1'b0,`_HL} + {1'b0,tmp,tmp2}) & 17'h10000) ? 1'b1 : 1'b0,
 					  `_F[3:0]
 					};
diff --git a/core/insn_add_sp_imm8.v b/core/insn_add_sp_imm8.v
index 3350bdc..ff5da37 100644
--- a/core/insn_add_sp_imm8.v
+++ b/core/insn_add_sp_imm8.v
@@ -20,7 +20,15 @@
 `ifdef WRITEBACK
 	`INSN_ADD_SP_IMM8: begin
 		case (cycle)
-		2:	`_SP <= `_SP + {rdata[7] ? 8'hFF : 8'h00, rdata};
+		2:	begin
+				`_SP <= `_SP + {rdata[7] ? 8'hFF : 8'h00, rdata};
+				`_F <= {
+					2'b00,
+					(({1'b0,`_SPL[3:0]} + {1'b0,rdata[3:0]}) & 5'h10) ? 1'b1 : 1'b0,
+					(({1'b0,`_SPL} + {1'b0,rdata}) & 9'h100) ? 1'b1 : 1'b0,
+					`_F[3:0]
+					};
+			end
 		endcase
 	end
 `endif
diff --git a/core/insn_ldhl_sp_imm8.v b/core/insn_ldhl_sp_imm8.v
index 688465a..3b017a3 100644
--- a/core/insn_ldhl_sp_imm8.v
+++ b/core/insn_ldhl_sp_imm8.v
@@ -20,7 +20,15 @@
 `ifdef WRITEBACK
 	`INSN_LDHL_SP_IMM8: begin
 		case (cycle)
-		2:	`_HL <= `_SP + {rdata[7] ? 8'hFF : 8'h00, rdata};
+		2:	begin
+				`_HL <= `_SP + {rdata[7] ? 8'hFF : 8'h00, rdata};
+				`_F <= {
+					2'b00,
+					(({1'b0,`_SPL[3:0]} + {1'b0,rdata[3:0]}) & 5'h10) ? 1'b1 : 1'b0,
+					(({1'b0,`_SPL} + {1'b0,rdata}) & 9'h100) ? 1'b1 : 1'b0,
+					`_F[3:0]
+					};
+			end
 		endcase
 	end
 `endif
-- 
2.43.0