sux.h: Add bitmasks for writing a value to memory.

1 files changed, 4 insertions, 1 deletions

diff --git a/sux.h b/sux.h
index 4bd3a8c..a161c48 100644
--- a/sux.h
+++ b/sux.h
@@ -1792,7 +1792,7 @@ static /*inline*/ void exec_base_inst(struct sux *cpu, uint8_t opcode, uint8_t p
 #define inst(op, ext) \
 static /*inline*/ void inst_##op(struct sux *cpu, uint8_t prefix, uint8_t size, int inc_pc, int inc_clk, uint8_t thread) { \
 	const unsigned int o8 = 0x##op / 32, o8m = 1 << (0x##op % 32); \
-	const uint8_t rs = 1 << ((prefix >> 4) & 3); \
+	const uint8_t rs = (1 << ((prefix >> 4) & 3)) - 1; \
 	uint64_t addr = 0, idx = 0, tmp = 0, tmp2 = 0; \
 	uint64_t dummy = 0, *reg = &dummy; \
 	int pre_idx = 0, mem_type = ZM; \
@@ -1808,6 +1808,7 @@ static /*inline*/ void inst_##op(struct sux *cpu, uint8_t prefix, uint8_t size,
 	t(7, 0x00460160, 0x00460160, 0x00160160, 0x00160160, 0x01161360, 0x11165161, 0x11175161, 0x01171160) { addr = read_addr(cpu, prefix, inc_clk, mem_type, inc_pc) + idx; } /* Read address from memory. */ \
 	t(0, 0x01000000, 0x01000000, 0x04000400, 0x00000000, 0x00000000, 0x40000000, 0x40000000, 0x00000000) { pre_idx = 1; } /* Set pre-index flag, for indexed indirect. */ \
 	t(0, 0x07101210, 0x17101410, 0x14001400, 0x10001000, 0x10000000, 0x40000000, 0x40000000, 0x00000000) { addr = ind_idx_addr(cpu, prefix, inc_clk, ZM, inc_pc, idx, pre_idx); } /* Indirect addressing, with indexing. */ \
+	t(7, 0x07561370, 0x17561570, 0x14161560, 0x10161160, 0x11161360, 0x51165161, 0x51175161, 0x01171160) { idx = 0; } /* Reset index. */ \
 	/* Load Source. */ \
 	t(0, 0x02220022, 0x03760576, 0x00320522, 0x00761166, 0x00660066, 0x00660066, 0x51665066, 0x00660066) { reg = &cpu->a; } /* Most operations use the accumulator as an operand */ \
 	t(0, 0x05540354, 0x04000000, 0x04000200, 0x02000000, 0x10000000, 0x51005000, 0x00000000, 0x04100110) { reg = &cpu->b; } /* ldb, stb, cpb, inb, deb, tba */ \
@@ -1821,6 +1822,8 @@ static /*inline*/ void inst_##op(struct sux *cpu, uint8_t prefix, uint8_t size,
 	t(0, 0x00000000, 0x00000200, 0x02000210, 0x02000210, 0x02000000, 0x00000000, 0x00000000, 0x00000000) { tmp = *reg; } /* Mogrifying register. */ \
 	t(0, 0x00000000, 0x00000200, 0x00100310, 0x00000200, 0x00000000, 0x00000000, 0x00000000, 0x00000000) { ++tmp; } /* inc */ \
 	t(0, 0x00000000, 0x00000000, 0x02000000, 0x02100110, 0x02000000, 0x00000000, 0x00000000, 0x00000000) { --tmp; } /* dec */ \
+	/* Store modified value into memory. */ \
+	t(0, 0x00100000, 0x04101400, 0x00100100, 0x10100100, 0x01001000, 0x51005000, 0x51005000, 0x01001000) { write_value(cpu, tmp, addr, rs, inc_clk, 1); } \
 }
 
 #undef ORTHO_1CC