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nintendo/vt1682_alu.cpp, tvgames/spg29x.cpp: Use multibyte.h helpers

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This commit is contained in:
AJR 2023-11-04 13:37:19 -04:00
parent d61f8497ed
commit 552c00be31
2 changed files with 14 additions and 18 deletions
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24
src/mame/nintendo/vt1682_alu.cpp
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@ -4,6 +4,8 @@
#include "emu.h"
#include "vt1682_alu.h"
#include "multibyte.h"
#define LOG_ALU (1U << 1)
#define LOG_ALL (LOG_ALU)
@ -274,15 +276,12 @@ void vrt_vt1682_alu_device::alu_oprand_6_mult_w(uint8_t data)
if (!m_is_sound_alu) LOGMASKED(LOG_ALU, "------------------------------------------ MULTIPLICATION REQUESTED ------------------------------------\n");
m_alu_oprand_mult[1] = data;
int param1 = (m_alu_oprand_mult[1] << 8) | m_alu_oprand_mult[0];
int param2 = (m_alu_oprand[1] << 8) | m_alu_oprand[0];
int param1 = get_u16le(&m_alu_oprand_mult[0]);
int param2 = get_u16le(&m_alu_oprand[0]);
uint32_t result = param1 * param2;
m_alu_out[0] = result & 0xff;
m_alu_out[1] = (result >> 8) & 0xff;
m_alu_out[2] = (result >> 16) & 0xff;
m_alu_out[3] = (result >> 24) & 0xff;
put_u32le(&m_alu_out[0], result);
// 4/5 untouched? or set to 0?
}
@ -325,9 +324,9 @@ void vrt_vt1682_alu_device::alu_oprand_6_div_w(uint8_t data)
//LOGMASKED(LOG_ALU, "%s: alu_oprand_6_div_w writing: %02x\n", machine().describe_context(), data);
m_alu_oprand_div[1] = data;
uint32_t param1 = (m_alu_oprand[3] << 24) | (m_alu_oprand[2] << 16) | (m_alu_oprand[1] << 8) | m_alu_oprand[0];
uint32_t param1 = get_u32le(&m_alu_oprand[0]);
// sources say the mult registers are used here, but that makes little sense?
uint32_t param2 = (m_alu_oprand_div[1] << 8) | m_alu_oprand_div[0];
uint32_t param2 = get_u16le(&m_alu_oprand_div[0]);
if (param2 != 0)
{
@ -336,12 +335,7 @@ void vrt_vt1682_alu_device::alu_oprand_6_div_w(uint8_t data)
uint32_t result = param1 / param2;
uint32_t remainder = param1 % param2;
m_alu_out[0] = result & 0xff;
m_alu_out[1] = (result >> 8) & 0xff;
m_alu_out[2] = (result >> 16) & 0xff;
m_alu_out[3] = (result >> 24) & 0xff;
m_alu_out[4] = remainder & 0xff;
m_alu_out[5] = (remainder >> 8) & 0xff;
put_u32le(&m_alu_out[0], result);
put_u16le(&m_alu_out[4], remainder);
}
}

8
src/mame/tvgames/spg29x.cpp
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@ -81,6 +81,8 @@
#include "screen.h"
#include "softlist_dev.h"
#include "multibyte.h"
namespace {
@ -405,9 +407,9 @@ void spg29x_nand_game_state::machine_reset()
{
spg29x_game_state::machine_reset();
uint32_t bootstrap_ram_start = (m_strippedrom[m_firstvector+0] << 0) | (m_strippedrom[m_firstvector+1] << 8) | (m_strippedrom[m_firstvector+2] << 16) | (m_strippedrom[m_firstvector+3] << 24);
uint32_t bootstrap_ram_end = (m_strippedrom[m_firstvector+4] << 0) | (m_strippedrom[m_firstvector+5] << 8) | (m_strippedrom[m_firstvector+6] << 16) | (m_strippedrom[m_firstvector+7] << 24);
uint32_t bootstrap_ram_boot = (m_strippedrom[m_firstvector+8] << 0) | (m_strippedrom[m_firstvector+9] << 8) | (m_strippedrom[m_firstvector+10] << 16) | (m_strippedrom[m_firstvector+11] << 24);
uint32_t bootstrap_ram_start = get_u32le(&m_strippedrom[m_firstvector+0]);
uint32_t bootstrap_ram_end = get_u32le(&m_strippedrom[m_firstvector+4]);
uint32_t bootstrap_ram_boot = get_u32le(&m_strippedrom[m_firstvector+8]);
// there is a 0x01 at 0x26, possibly related to source location / block in NAND to copy from?