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not good at this

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ed
2026-06-01 20:55:50 -04:00
parent d89a29c941
commit 5cc30bacc6
4 changed files with 90 additions and 46 deletions
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code/duffle/mips.h
+20 -21
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@@ -59,11 +59,10 @@ enum {
, op_lw = 0x23 /* Load Word */
, op_lbu = 0x24 /* Load Byte Unsigned */
, op_lhu = 0x25 /* Load Halfword Unsigned */
, op_lwc2 = 0x32 /* Load Word to Coprocessor 2 (GTE) */
, op_sb = 0x28 /* Store Byte */
, op_sh = 0x29 /* Store Halfword */
, op_sw = 0x2B /* Store Word */
, op_swc2 = 0x3A /* Store Word from Coprocessor 2 (GTE) */
, op_load_addr = op_la
, op_load_imm = op_li
@@ -225,17 +224,17 @@ enum {
* 5. lw $ra, 4($sp); jr $ra ; restore & return
* 6. sp += 8
*/
I_
internal
Code CodeBlob_(mips_flush_icache) {
add_ui(rstack_ptr, rstack_ptr, -8), /* sp -= 8 */
store_word(rret_addr, rstack_ptr, 4), /* sw $ra, 4($sp) */
add_ui(rret_0, rdiscard, bios_flushcache), /* addiu $a0, $0, 0x44 */
add_ui(rtmp_0, rdiscard, bios_table_addr), /* addiu $t0, $0, 0xA0 */
jump_link(rtmp_0, rret_addr), /* jalr $t0, $ra */
nop(), /* BD slot */
load_word(rret_addr, rstack_ptr, 4), /* lw $ra, 4($sp) */
jump_reg(rret_addr), /* jr $ra */
add_ui(rstack_ptr, rstack_ptr, 8) /* sp += 8 (BD) */
add_ui(rstack_ptr, rstack_ptr, -8), /* sp -= 8 */
store_word(rret_addr, rstack_ptr, 4), /* sw $ra, 4($sp) */
add_ui(rret_0, rdiscard, bios_flushcache), /* addiu $a0, $0, 0x44 */
add_ui(rtmp_0, rdiscard, bios_table_addr), /* addiu $t0, $0, 0xA0 */
jump_link(rtmp_0, rret_addr), /* jalr $t0, $ra */
nop(), /* BD slot */
load_word(rret_addr, rstack_ptr, 4), /* lw $ra, 4($sp) */
jump_reg(rret_addr), /* jr $ra */
add_ui(rstack_ptr, rstack_ptr, 8) /* sp += 8 (BD) */
};
FI_ void mips_flush_icache(void) { C_(VoidFn*, codeblob_mips_flush_icache)(); }
@@ -243,15 +242,15 @@ FI_ void mips_flush_icache(void) { C_(VoidFn*, codeblob_mips_flush_icache)(); }
#define asm_mips_flush_icache() asm volatile( \
asm_inline( \
add_ui(rstack_ptr, rstack_ptr, -8) \
, store_word(rret_addr, rstack_ptr, 4) \
, add_ui(rret_0, rdiscard, bios_flushcache) \
, add_ui(rtmp_0, rdiscard, bios_table_addr) \
, jump_link(rtmp_0, rret_addr) \
, nop() \
, load_word(rret_addr, rstack_ptr, 4) \
, jump_reg(rret_addr) \
, add_ui(rstack_ptr, rstack_ptr, 8) \
add_ui(rstack_ptr, rstack_ptr, -8) \
, store_word(rret_addr, rstack_ptr, 4) \
, add_ui(rret_0, rdiscard, bios_flushcache) \
, add_ui(rtmp_0, rdiscard, bios_table_addr) \
, jump_link(rtmp_0, rret_addr) \
, nop() \
, load_word(rret_addr, rstack_ptr, 4) \
, jump_reg(rret_addr) \
, add_ui(rstack_ptr, rstack_ptr, 8) \
) \
asm_clobber( clb_system ) \
)