Lephenixnoir
/
fxos
3
2
Fork 1
Code Issues 2 Pull Requests 1 Releases Wiki Activity

lib/load-asm: greatly improve loading time with less strings

This commit is contained in:
Lephenixnoir 2021-03-16 13:40:36 +01:00
parent dea24a2547
commit ca1217af1b
Signed by: Lephenixnoir
GPG Key ID: 1BBA026E13FC0495
1 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
lib/load-asm.l
View File

@ -173,19 +173,22 @@ static Pattern make_pattern(char const *code)
Returns a semantic FxOS::Argument. */
static Argument make_arg(int token, int opsize, int m, int n, int d, int i)
{
/* TODO: This function is too slow for the ~100k times it is called. */
using Reg = CpuRegister;
static Reg general_purpose[16] = {
Reg::R0, Reg::R1, Reg::R2, Reg::R3, Reg::R4, Reg::R5,
Reg::R6, Reg::R7, Reg::R8, Reg::R9, Reg::R10, Reg::R11,
Reg::R12, Reg::R13, Reg::R14, Reg::R15,
};
/* Registers rn and rm */
CpuRegister Rn(format("r%d", n & 0xf));
CpuRegister Rm(format("r%d", m & 0xf));
CpuRegister Rn = general_purpose[n & 0xf];
CpuRegister Rm = general_purpose[m & 0xf];
/* Sign extensions of d to 8 and 12 bits */
int32_t d8 = (int8_t)d;
int32_t d12 = (d & 0x800) ? (int32_t)(d | 0xfffff000) : (d);
/* Sign extension of i to 8 bits */
int32_t i8 = (int8_t)i;
using Reg = CpuRegister;
switch(token)
{
case R0: return Argument_Reg(Reg::R0);