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fixes to the reg file allocator, exploring...

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ed
2026-08-14 00:43:19 -04:00
parent d88e0d0487
commit c447bfa877
4 changed files with 126 additions and 97 deletions
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code/duffle/dsl.h
+5 -5
View File
@@ -218,16 +218,16 @@ def_signed_ops(le, <=)
typedef Span_(S4);
typedef Span_(U4);
#if 0
#pragma region Debug
#define debug_trap() __builtin_debugtrap()
#define debug_trap() __builtin_trap()
#if BUILD_DEBUG
IA_ void assert(U8 cond) { if(cond){return;} else{debug_trap(); ms_exit_process(1);} }
#define assert(cond) if(cond == false){debug_trap();}
#else
#define assert(cond)
# ifndef assert
# include <assert.h>
# endif
#endif
#pragma endregion Debug
#endif
#define GCC_OPTIMIZATION_DISABLE _Pragma("GCC push_options") _Pragma("GCC optimize(\"O0\")")
#define GCC_OPTIMIZATION_ENABLE _Pragma("GCC pop_options")
code/duffle/lottes_tape.h
+22 -12
View File
@@ -307,11 +307,7 @@ typedef Struct_(RegFile) {
A2_U2 GPR;
A2_U2 GTE;
};
typedef Struct_(RegFile_RInfo) {
U2_R section;
U2 mask;
B2 occupied;
};
#define regfile(pin_mask) {.GPR={u4_lo(pin_mask), u4_hi(pin_mask)} }
FI_ void regfile_init(RegFile_R rf) {
/* pack the 32-bit ABI mask into the two U2s */
rf->GPR[0] = u4_lo(regfile_abi_mask);
@@ -320,11 +316,16 @@ FI_ void regfile_init(RegFile_R rf) {
}
FI_ RegFile regfile_make(void) { RegFile rf; regfile_init(& rf); return rf; }
typedef Struct_(RegFile_RInfo) {
U2_R section;
U2 mask;
B2 occupied;
};
FI_ RegFile_RInfo regfile_rinfo(A2_U2 file, Reg r_id) {
U2 s_id = r_id >> 4;
U2_R section = & file[s_id];
U2 mask = (1u << (r_id & 15));
B2 occupied = section[0] & mask != 0;
U2 mask = u2_(1u << (r_id & 15));
B2 occupied = (section[0] & mask) != 0;
return (RegFile_RInfo){section, mask, occupied};
}
FI_ Reg regfile__alloc_helper(A2_U2 file, Reg r_id) {
@@ -337,12 +338,12 @@ FI_ Reg regfile__alloc_helper(A2_U2 file, Reg r_id) {
}
I_ Reg regfile_alloc(RegFile_R rf) {
U2 allocated = 0;
for range_iter(r_id, <=, r1u2(R_T0, R_T7)) {
allocated = regfile__alloc_helper(rf->GPR, r_id); Jmp_nZero_(allocated,resolved);
}
for range_iter(r_id, <=, r1u2(R_V0, R_V1)) {
for index_iter(Reg, r_id, R_T0, <=, R_T7) {
allocated = regfile__alloc_helper(rf->GPR, r_id); Jmp_nZero_(allocated,resolved);
}
allocated = regfile__alloc_helper(rf->GPR, R_V0); Jmp_nZero_(allocated,resolved);
allocated = regfile__alloc_helper(rf->GPR, R_V1);
assert(allocated != 0);
resolved: return allocated;
}
FI_ Reg regfile_pin(RegFile_R rf, Reg r_id) {
@@ -351,9 +352,14 @@ FI_ Reg regfile_pin(RegFile_R rf, Reg r_id) {
info.section[0] |= info.mask;
return r_id;
}
FI_ void regfile_pin_mask(RegFile_R rf, U4 mask) {
B4 occupied = u4_r(rf->GPR)[0] & mask;
assert(occupied == false);
u4_r(rf->GPR)[0] |= mask;
}
FI_ void regfile_free_mask(RegFile_R rf, U4 mask) {
if (regfile_abi_mask & mask) return;
u4_r(rf->GPR)[0] &= mask;
u4_r(rf->GPR)[0] &= ~mask;
}
FI_ void regfile_free_reg(RegFile_R rf, Reg r_id) {
/* never free the ABI set */
@@ -365,6 +371,10 @@ FI_ void regfile_reset(RegFile_R rf) {
rf->GPR[0] = u4_lo(regfile_abi_mask);
rf->GPR[1] = u4_hi(regfile_abi_mask);
}
FI_ void regfile_reset_mask(RegFile_R rf, U4 mask) {
rf->GPR[0] = u4_lo(mask);
rf->GPR[1] = u4_hi(mask);
}
#pragma endregion RegFileArena (Register File Allocator)
#pragma region Mips Atom Procs