sas2026/tinyriscv
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mem macro instead of load/store

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This commit is contained in:
inixyz
2023-10-24 00:39:07 +03:00
parent 993c92d1e6
commit f977ca40d4
1 changed files with 11 additions and 47 deletions
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58
src/tinyriscv.h
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@@ -3,13 +3,9 @@
#include <stdint.h>
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef int8_t i8;
typedef int16_t i16;
typedef int32_t i32;
typedef uint8_t u8; typedef int8_t i8;
typedef uint16_t u16; typedef int16_t i16;
typedef uint32_t u32; typedef int32_t i32;
typedef struct{
u32 x[32], pc, mem_size;
@@ -18,41 +14,7 @@ typedef struct{
const u32 tinyriscv_MEM_OFFSET = 0x80000000;
////////////////////////////////////////////////////////////////////////////////
static inline u8 load8(const u8* mem, const u32 addr){
return mem[addr - tinyriscv_MEM_OFFSET];
}
////////////////////////////////////////////////////////////////////////////////
static inline u16 load16(const u8* mem, const u32 addr){
return *(u16*)(mem + addr - tinyriscv_MEM_OFFSET);
}
////////////////////////////////////////////////////////////////////////////////
static inline u32 load32(const u8* mem, const u32 addr){
return *(u32*)(mem + addr - tinyriscv_MEM_OFFSET);
}
////////////////////////////////////////////////////////////////////////////////
static inline void store8(u8* mem, const u32 addr, const u8 val){
mem[addr - tinyriscv_MEM_OFFSET] = val;
}
////////////////////////////////////////////////////////////////////////////////
static inline void store16(u8* mem, const u32 addr, const u16 val){
*(u16*)(mem + addr - tinyriscv_MEM_OFFSET) = val;
}
////////////////////////////////////////////////////////////////////////////////
static inline void store32(u8* mem, const u32 addr, const u32 val){
*(u32*)(mem + addr - tinyriscv_MEM_OFFSET) = val;
}
#define MEM(size, mem, addr) (*(u##size*)(mem + addr - tinyriscv_MEM_OFFSET))
////////////////////////////////////////////////////////////////////////////////
@@ -71,17 +33,19 @@ void tinyriscv_b_type(u32* pc, const u8 funct3, const u32 x[32], const u8 rs1,
////////////////////////////////////////////////////////////////////////////////
//TODO change parameter order (funct3 first etc)...
void tinyriscv_l_type(const u8* mem, const u8 funct3, u32 x[32], const u8 rd,
const u8 rs1, const i16 imm){
const u32 addr = x[rs1] + (i32)imm;
switch(funct3){
case /*LB*/ 0: x[rd] = (i32)(i8)load8(mem, addr); break;
case /*LH*/ 1: x[rd] = (i32)(i16)load16(mem, addr); break;
case /*LW*/ 2: x[rd] = load32(mem, addr); break;
case /*LBU*/ 4: x[rd] = load8(mem, addr); break;
case /*LHU*/ 5: x[rd] = load16(mem, addr); break;
case /*LB*/ 0: x[rd] = (i32)(i8)MEM(8, mem, addr); break;
case /*LH*/ 1: x[rd] = (i32)(i16)MEM(16, mem, addr); break;
case /*LW*/ 2: x[rd] = MEM(32, mem, addr); break;
case /*LBU*/ 4: x[rd] = MEM(8, mem, addr); break;
case /*LHU*/ 5: x[rd] = MEM(16, mem, addr); break;
}
}