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z8000: Fix unreliable order of operations in operand calculation for certain instruction modes

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This commit is contained in:
AJR 2020-04-17 21:07:00 -04:00
parent 731b6edd7d
commit 4dd6521546
1 changed files with 3 additions and 2 deletions
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5
src/devices/cpu/z8000/z8000cpu.h
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@ -166,11 +166,12 @@
#define GET_IMM8(o) uint8_t imm8 = (uint8_t)get_operand(o)
// Be very careful with order of operations since get_operand has side effects
#define GET_IMM16(o) uint16_t imm16 = get_operand(o)
#define GET_IDX16(o) uint32_t idx16 = get_operand(o)
#define GET_IMM32 uint32_t imm32 = (get_operand(1) << 16) + get_operand(2)
#define GET_IMM32 uint32_t imm32 = get_operand(1); imm32 = (imm32 << 16) + get_operand(2)
#define GET_DSP7 uint8_t dsp7 = get_operand(0) & 127
#define GET_DSP8 int8_t dsp8 = (int8_t)get_operand(0)
#define GET_DSP16 uint32_t dsp16 = addr_add(m_pc, (int16_t)get_operand(1))
#define GET_DSP16 uint16_t tmp16 = get_operand(1); uint32_t dsp16 = addr_add(m_pc, (int16_t)tmp16)
#define GET_ADDR(o) uint32_t addr = (uint32_t)get_addr_operand(o)
#define GET_ADDR_RAW(o) uint32_t addr = (uint32_t)get_raw_addr_operand(o)