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DSP LLE: Remove byteswaps and other bloat from the hot path (do them at load/dma time). Minor speedup, perhaps.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2939 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard
2009-04-08 21:46:54 +00:00
parent e5edb4c4ad
commit 8c861ad58d
13 changed files with 65 additions and 77 deletions
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56
Source/Plugins/Plugin_DSP_LLE/Src/gdsp_memory.cpp
View File

@ -30,19 +30,14 @@
#include "gdsp_memory.h"
#include "gdsp_interface.h"
u16 dsp_swap16(u16 x)
{
return (x >> 8) | (x << 8);
}
u16 dsp_imem_read(u16 addr)
{
switch (addr >> 12)
{
case 0:
return dsp_swap16(g_dsp.iram[addr & DSP_IRAM_MASK]);
return g_dsp.iram[addr & DSP_IRAM_MASK];
case 8:
return dsp_swap16(g_dsp.irom[addr & DSP_IROM_MASK]);
return g_dsp.irom[addr & DSP_IROM_MASK];
default:
ERROR_LOG(DSPLLE, "%04x DSP ERROR: Executing from invalid (%04x) memory", g_dsp.pc, addr);
return 0;
@ -54,10 +49,10 @@ u16 dsp_dmem_read(u16 addr)
switch (addr >> 12)
{
case 0x0: // 0xxx DRAM
return dsp_swap16(g_dsp.dram[addr & DSP_DRAM_MASK]);
return g_dsp.dram[addr & DSP_DRAM_MASK];
case 0x1: // 1xxx COEF
return dsp_swap16(g_dsp.coef[addr & DSP_COEF_MASK]);
return g_dsp.coef[addr & DSP_COEF_MASK];
// FIXME: unknown addresses used by zelda
/* case 0x2:
@ -74,37 +69,24 @@ u16 dsp_dmem_read(u16 addr)
}
}
void dsp_dmem_write(u16 addr, u16 val)
{
switch (addr >> 12)
{
case 0x0: // 0xxx DRAM
g_dsp.dram[addr & DSP_DRAM_MASK] = dsp_swap16(val);
break;
case 0x0: // 0xxx DRAM
g_dsp.dram[addr & DSP_DRAM_MASK] = val;
break;
case 0x1: // 1xxx COEF
ERROR_LOG(DSPLLE, "someone writes to COEF");
break;
case 0xf: // Fxxx HW regs
gdsp_ifx_write(addr, val);
break;
default: // error
ERROR_LOG(DSPLLE, "%04x DSP ERROR: Write to UNKNOWN (%04x) memory", g_dsp.pc, addr);
break;
case 0x1: // 1xxx COEF
ERROR_LOG(DSPLLE, "someone writes to COEF (pc = %02x)", g_dsp.pc);
break;
case 0xf: // Fxxx HW regs
gdsp_ifx_write(addr, val);
break;
default: // error
ERROR_LOG(DSPLLE, "%04x DSP ERROR: Write to UNKNOWN (%04x) memory", g_dsp.pc, addr);
break;
}
}
u16 dsp_fetch_code()
{
u16 opc = dsp_imem_read(g_dsp.pc);
g_dsp.pc++;
return opc;
}
u16 dsp_peek_code()
{
return dsp_imem_read(g_dsp.pc);
}
}