diff options
Diffstat (limited to 'src/runtime/asm_loong64.s')
| -rw-r--r-- | src/runtime/asm_loong64.s | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/src/runtime/asm_loong64.s b/src/runtime/asm_loong64.s index a6ccd196c9..09a2964511 100644 --- a/src/runtime/asm_loong64.s +++ b/src/runtime/asm_loong64.s @@ -628,21 +628,21 @@ TEXT runtime·gcWriteBarrier(SB),NOSPLIT,$216 // Save the registers clobbered by the fast path. MOVV R19, 208(R3) MOVV R13, 216(R3) +retry: MOVV g_m(g), R19 MOVV m_p(R19), R19 MOVV (p_wbBuf+wbBuf_next)(R19), R13 + MOVV (p_wbBuf+wbBuf_end)(R19), R30 // R30 is linker temp register // Increment wbBuf.next position. ADDV $16, R13 + // Is the buffer full? + BLTU R30, R13, flush + // Commit to the larger buffer. MOVV R13, (p_wbBuf+wbBuf_next)(R19) - MOVV (p_wbBuf+wbBuf_end)(R19), R19 - MOVV R19, R30 // R30 is linker temp register // Record the write. MOVV R28, -16(R13) // Record value MOVV (R27), R19 // TODO: This turns bad writes into bad reads. MOVV R19, -8(R13) // Record *slot - // Is the buffer full? - BEQ R13, R30, flush -ret: MOVV 208(R3), R19 MOVV 216(R3), R13 // Do the write. @@ -652,8 +652,8 @@ ret: flush: // Save all general purpose registers since these could be // clobbered by wbBufFlush and were not saved by the caller. - MOVV R27, 8(R3) // Also first argument to wbBufFlush - MOVV R28, 16(R3) // Also second argument to wbBufFlush + MOVV R27, 8(R3) + MOVV R28, 16(R3) // R1 is LR, which was saved by the prologue. MOVV R2, 24(R3) // R3 is SP. @@ -686,8 +686,6 @@ flush: // R30 is tmp register. MOVV R31, 200(R3) - - // This takes arguments R27 and R28. CALL runtime·wbBufFlush(SB) MOVV 8(R3), R27 @@ -715,7 +713,7 @@ flush: MOVV 184(R3), R26 MOVV 192(R3), R29 MOVV 200(R3), R31 - JMP ret + JMP retry // Note: these functions use a special calling convention to save generated code space. // Arguments are passed in registers, but the space for those arguments are allocated |