📄 ac3dec.s
字号:
.file 1 "ac3dec.c".section .mdebug.abi32.previous.section .text.ac3_decode_end,"ax",@progbits.align 2.align 5.ent ac3_decode_end.type ac3_decode_end, @functionac3_decode_end:.frame $sp,24,$31 # vars= 0, regs= 2/0, args= 16, gp= 0.mask 0x80010000,-4.fmask 0x00000000,0.set noreorder.set nomacroaddiu $sp,$sp,-24sw $31,20($sp)sw $16,16($sp)lw $16,136($4)jal ff_mdct_endaddiu $4,$16,16960jal ff_mdct_endaddiu $4,$16,17004lw $31,20($sp)lw $16,16($sp)move $2,$0j $31addiu $sp,$sp,24.set macro.set reorder.end ac3_decode_end.globl __floatsisf.globl __mulsf3.globl __floatsidf.globl __muldf3.globl __truncdfsf2.globl __divdf3.globl __adddf3.section .rodata.cst4,"aM",@progbits,4.align 2$LC0:.word 1059760811.align 2$LC1:.word 1053609165.align 2$LC2:.word 1044000396.align 2$LC3:.word 1049774373.align 2$LC4:.word -1083248912.align 2$LC5:.word -1085485874.align 2$LC6:.word -1087722837.align 2$LC7:.word -1089959799.align 2$LC8:.word -1093874482.align 2$LC9:.word -1098348407.align 2$LC10:.word -1106737015.align 2$LC11:.word 1040746633.align 2$LC12:.word 1049135241.align 2$LC13:.word 1053609166.align 2$LC14:.word 1057523849.align 2$LC15:.word 1061997774.align 2$LC16:.word 1064234736.align 2$LC17:.word 1073741824.section .rodata.cst8,"aM",@progbits,8.align 3$LC18:.word 1602783268.word 1069381916.align 3$LC19:.word 0.word 1073741824.align 3$LC20:.word 0.word 1072693248.align 3$LC21:.word -80130773.word 1064228782.section .rodata.cst4.align 2$LC22:.word 1136689152.align 2$LC23:.word 1065353216.align 2$LC24:.word 1191181824.section .text.ac3_decode_init,"ax",@progbits.align 2.align 5.ent ac3_decode_init.type ac3_decode_init, @functionac3_decode_init:.frame $sp,2120,$31 # vars= 2064, regs= 10/0, args= 16, gp= 0.mask 0xc0ff0000,-4.fmask 0x00000000,0.set noreorder.set nomacroaddiu $sp,$sp,-2120sw $22,2104($sp)sw $21,2100($sp)sw $20,2096($sp)sw $19,2092($sp)sw $18,2088($sp)sw $31,2116($sp)sw $fp,2112($sp)sw $23,2108($sp)sw $17,2084($sp)sw $16,2080($sp)lw $2,136($4)sw $4,2120($sp)sw $2,2072($sp)lw $3,2072($sp)li $2,65536 # 0x10000addu $2,$3,$2jal ac3_common_initsw $4,-23388($2)lui $2,%hi(b1_mantissas)lui $4,%hi($LC0)addiu $19,$2,%lo(b1_mantissas)li $3,954400768 # 0x38e30000li $2,1431633920 # 0x55550000lw $20,%lo($LC0)($4)ori $21,$3,0x8e39ori $22,$2,0x5556move $18,$0$L4:mult $18,$21sra $2,$18,31mfhi $16sra $16,$16,1subu $16,$16,$2addiu $4,$16,-1jal __floatsisfsll $17,$16,3addu $17,$17,$16subu $17,$18,$17move $5,$20jal __mulsf3move $4,$2mult $17,$22sra $3,$17,31mfhi $16sw $2,0($19)subu $16,$16,$3jal __floatsisfaddiu $4,$16,-1move $4,$2jal __mulsf3move $5,$20sll $3,$16,1addu $3,$3,$16subu $17,$17,$3addiu $4,$17,-1jal __floatsisfsw $2,4($19)move $4,$2jal __mulsf3move $5,$20sw $2,8($19)addiu $18,$18,1li $2,32 # 0x20bne $18,$2,$L4addiu $19,$19,12lui $2,%hi($LC1)lui $3,%hi($LC2)lw $22,%lo($LC1)($2)lui $2,%hi(b2_mantissas)lw $23,%lo($LC2)($3)addiu $19,$2,%lo(b2_mantissas)lui $3,%hi(b4_mantissas)li $2,1374355456 # 0x51eb0000addiu $21,$3,%lo(b4_mantissas)ori $fp,$2,0x851fmove $20,$0$L6:mult $20,$fpsra $18,$20,31mfhi $16sra $16,$16,3subu $16,$16,$18jal __floatsisfaddiu $4,$16,-2move $4,$2jal __mulsf3move $5,$22sll $17,$16,5sll $3,$16,3subu $17,$17,$3addu $17,$17,$16li $3,1717960704 # 0x66660000subu $17,$20,$17ori $3,$3,0x6667mult $17,$3sra $3,$17,31mfhi $16sw $2,0($19)sra $16,$16,1subu $16,$16,$3jal __floatsisfaddiu $4,$16,-2move $4,$2jal __mulsf3move $5,$22sll $3,$16,2addu $3,$3,$16subu $17,$17,$3addiu $4,$17,-2jal __floatsisfsw $2,4($19)move $4,$2jal __mulsf3move $5,$22li $3,780861440 # 0x2e8b0000ori $3,$3,0xa2e9mult $20,$3sw $2,8($19)mfhi $16addiu $19,$19,12sra $16,$16,1subu $16,$16,$18jal __floatsisfaddiu $4,$16,-5move $4,$2jal __mulsf3move $5,$23sll $3,$16,2sll $4,$16,4subu $4,$4,$3subu $4,$4,$16subu $4,$20,$4addiu $4,$4,-5jal __floatsisfsw $2,0($21)move $4,$2jal __mulsf3move $5,$23sw $2,4($21)addiu $20,$20,1li $2,128 # 0x80bne $20,$2,$L6addiu $21,$21,8lui $2,%hi($LC3)lui $3,%hi(b3_mantissas)lw $19,%lo($LC3)($2)addiu $17,$3,%lo(b3_mantissas)li $16,-3 # 0xfffffffffffffffdli $18,4 # 0x4$L8:jal __floatsisfmove $4,$16move $4,$2jal __mulsf3move $5,$19addiu $16,$16,1sw $2,0($17)bne $16,$18,$L8addiu $17,$17,4lui $2,%hi($LC16)lui $5,%hi(b5_mantissas)lw $3,%lo($LC16)($2)lui $4,%hi($LC0)lw $6,%lo($LC0)($4)lui $2,%hi($LC4)addiu $4,$5,%lo(b5_mantissas)sw $3,56($4)lw $3,%lo($LC4)($2)lui $2,%hi($LC5)sw $3,%lo(b5_mantissas)($5)lw $3,%lo($LC5)($2)lui $2,%hi($LC6)sw $3,4($4)lw $3,%lo($LC6)($2)lui $2,%hi($LC7)sw $3,8($4)lw $3,%lo($LC7)($2)lui $2,%hi($LC8)sw $3,12($4)lw $3,%lo($LC8)($2)lui $2,%hi($LC9)sw $3,16($4)lw $3,%lo($LC9)($2)lui $2,%hi($LC10)sw $3,20($4)lw $3,%lo($LC10)($2)lui $2,%hi($LC11)sw $3,24($4)lw $3,%lo($LC11)($2)lui $2,%hi($LC12)sw $3,32($4)lw $3,%lo($LC12)($2)lui $2,%hi($LC13)sw $3,36($4)lw $3,%lo($LC13)($2)lui $2,%hi($LC14)sw $3,40($4)lw $3,%lo($LC14)($2)lui $2,%hi($LC15)sw $3,44($4)lw $3,%lo($LC15)($2)move $5,$0lui $2,%hi(dynrng_tab)sw $6,48($4)sw $3,52($4)sw $5,28($4)addiu $18,$2,%lo(dynrng_tab)move $17,$0lui $20,%hi($LC17)li $19,256 # 0x100$L10:sra $2,$17,7sll $2,$2,3sra $4,$17,5subu $4,$4,$2jal __floatsisfaddiu $4,$4,-5lw $4,%lo($LC17)($20)jal powfmove $5,$2andi $4,$17,0x1fori $4,$4,0x20jal __floatsisfmove $16,$2move $5,$2jal __mulsf3move $4,$16addiu $17,$17,1sw $2,0($18)bne $17,$19,$L10addiu $18,$18,4lui $2,%hi(dialnorm_tab+4)addiu $17,$2,%lo(dialnorm_tab+4)li $16,-30 # 0xffffffffffffffe2lui $19,%hi($LC18)li $18,1 # 0x1$L12:jal __floatsidfmove $4,$16lw $6,%lo($LC18)($19)lw $7,%lo($LC18+4)($19)move $4,$2jal __muldf3move $5,$3move $4,$2jal __truncdfsf2move $5,$3jal expfmove $4,$2addiu $16,$16,1sw $2,0($17)bne $16,$18,$L12addiu $17,$17,4lui $4,%hi(dialnorm_tab)addiu $2,$4,%lo(dialnorm_tab)lw $3,124($2)lui $2,%hi(scale_factors)sw $3,%lo(dialnorm_tab)($4)addiu $17,$2,%lo(scale_factors)move $16,$0lui $19,%hi($LC19)li $18,-25 # 0xffffffffffffffe7$L14:jal __floatsidfmove $4,$16lw $4,%lo($LC19)($19)lw $5,%lo($LC19+4)($19)move $6,$2jal powmove $7,$3move $4,$2jal __truncdfsf2move $5,$3addiu $16,$16,-1sw $2,0($17)bne $16,$18,$L14addiu $17,$17,4lui $2,%hi(exp_ungroup_tab)addiu $8,$2,%lo(exp_ungroup_tab)li $3,1374355456 # 0x51eb0000li $2,1717960704 # 0x66660000ori $9,$3,0x851fori $10,$2,0x6667move $7,$0li $11,128 # 0x80$L16:mult $7,$9sra $2,$7,31mfhi $5sra $5,$5,3subu $5,$5,$2sll $4,$5,3sll $3,$5,5subu $3,$3,$4addu $3,$3,$5subu $3,$7,$3mult $3,$10sra $6,$3,31mfhi $4addiu $7,$7,1sra $4,$4,1subu $4,$4,$6sll $2,$4,2addu $2,$2,$4subu $3,$3,$2sb $3,2($8)sb $5,0($8)sb $4,1($8)bne $7,$11,$L16addiu $8,$8,3lw $2,2072($sp)li $5,8 # 0x8addiu $4,$2,17004jal ff_mdct_initli $6,1 # 0x1lw $3,2072($sp)li $5,9 # 0x9addiu $4,$3,16960jal ff_mdct_initli $6,1 # 0x1lui $3,%hi($LC20)lw $22,%lo($LC20)($3)lw $23,%lo($LC20+4)($3)move $19,$0sw $0,2064($sp)sw $0,2068($sp)addiu $fp,$sp,16$L18:li $5,256 # 0x100subu $4,$5,$19mul $4,$19,$4jal __floatsidfli $18,100 # 0x64lui $4,%hi($LC20)addiu $4,$4,%lo($LC20)move $20,$2move $21,$3lw $2,0($4)lw $3,4($4)move $4,$2$L50:lui $2,%hi($LC21)addiu $2,$2,%lo($LC21)lw $6,0($2)lw $7,4($2)jal __muldf3move $5,$3move $6,$2move $5,$21move $7,$3jal __muldf3move $4,$20mul $4,$18,$18move $16,$2jal __floatsidfmove $17,$3move $6,$2move $4,$16move $5,$17jal __divdf3move $7,$3addiu $18,$18,-1move $4,$2move $5,$3move $6,$22jal __adddf3move $7,$23bne $18,$0,$L50move $4,$2lw $4,2064($sp)lw $5,2068($sp)move $6,$2jal __adddf3move $7,$3sw $2,0($fp)sw $2,2064($sp)addiu $19,$19,1li $2,256 # 0x100sw $3,4($fp)sw $3,2068($sp)bne $19,$2,$L18addiu $fp,$fp,8lw $4,2064($sp)lw $5,2068($sp)move $6,$22jal __adddf3move $7,$23move $6,$2move $4,$22move $5,$23jal __divdf3move $7,$3move $21,$3lw $3,2072($sp)move $20,$2li $2,38608 # 0x96d0addu $16,$3,$2addiu $17,$sp,16addiu $18,$sp,2064$L22:lw $6,0($17)lw $7,4($17)move $4,$20jal __muldf3move $5,$21move $4,$2jal sqrtmove $5,$3move $4,$2jal __truncdfsf2move $5,$3addiu $17,$17,8sw $2,0($16)bne $17,$18,$L22addiu $16,$16,4lw $2,2072($sp)lw $5,2120($sp)jal dsputil_initaddiu $4,$2,17048lw $3,2072($sp)li $5,39648 # 0x9ae0addu $5,$3,$5jal av_init_randommove $4,$0lw $4,2072($sp)lui $2,%hi(ff_float_to_int16_c)lw $3,19924($4)addiu $2,$2,%lo(ff_float_to_int16_c)beq $3,$2,$L49move $2,$0lw $5,2072($sp)sw $2,20164($5)lui $2,%hi($LC24)lw $3,%lo($LC24)($2)sw $3,20168($5)$L26:lw $31,2116($sp)lw $fp,2112($sp)lw $23,2108($sp)lw $22,2104($sp)lw $21,2100($sp)lw $20,2096($sp)lw $19,2092($sp)lw $18,2088($sp)lw $17,2084($sp)lw $16,2080($sp)move $2,$0j $31addiu $sp,$sp,2120$L49:lui $2,%hi($LC22)lw $3,%lo($LC22)($2)lui $2,%hi($LC23)sw $3,20164($4)lw $3,%lo($LC23)($2)j $L26sw $3,20168($4).set macro.set reorder.end ac3_decode_init.globl __addsf3.globl __subsf3.section .rodata.cst4.align 2$LC25:.word 931135616.align 2$LC26:.word 1056964608.section .text.get_transform_coeffs_ch,"ax",@progbits.align 2.align 5.ent get_transform_coeffs_ch.type get_transform_coeffs_ch, @functionget_transform_coeffs_ch:.frame $sp,56,$31 # vars= 0, regs= 10/0, args= 16, gp= 0.mask 0xc0ff0000,-4.fmask 0x00000000,0.set noreorder.set nomacroaddiu $sp,$sp,-56sll $2,$5,2addu $2,$2,$4sw $22,40($sp)sw $18,24($sp)sw $31,52($sp)sw $fp,48($sp)sw $23,44($sp)sw $21,36($sp)sw $20,32($sp)sw $19,28($sp)sw $17,20($sp)sw $16,16($sp)sw $4,56($sp)lw $9,1156($2)lw $8,1128($2)sll $3,$5,8move $22,$6sll $5,$5,10lw $6,56($sp)addu $7,$3,$4addiu $5,$5,9792li $2,39632 # 0x9ad0slt $4,$8,$9addiu $3,$7,1220addu $18,$6,$2addiu $7,$7,3012beq $4,$0,$L52addu $5,$6,$5sll $2,$8,2addu $17,$5,$2subu $23,$9,$8addu $20,$7,$8addu $19,$3,$8move $21,$0lui $fp,%hi(scale_factors)$L54:lbu $9,0($20)sltu $2,$9,6beq $2,$0,$L55lui $3,%hi($L62)sll $2,$9,2addiu $3,$3,%lo($L62)addu $2,$2,$3lw $4,0($2)j $4nop.rdata.align 2.align 2$L62:.word $L56.word $L57.word $L58.word $L59.word $L60.word $L61.section .text.get_transform_coeffs_ch$L56:lw $3,56($sp)li $2,39648 # 0x9ae0addu $16,$3,$2lw $6,2496($16)slt $2,$6,624beq $2,$0,$L76nop$L63:sll $2,$6,2addu $2,$2,$16lw $3,0($2)li $2,-1658060800 # 0xffffffff9d2c0000srl $4,$3,11xor $3,$3,$4sll $5,$3,7ori $2,$2,0x5680and $5,$5,$2xor $3,$3,$5sll $2,$3,15li $4,-272236544 # 0xffffffffefc60000and $2,$2,$4xor $3,$3,$2srl $4,$3,18xor $3,$3,$4addiu $2,$6,1andi $4,$3,0xffffbltz $4,$L66sw $2,2496($16)jal __floatsisfnopmove $4,$2$L65:lui $2,%hi($LC25)jal __mulsf3lw $5,%lo($LC25)($2)lui $3,%hi($LC26)lw $5,%lo($LC26)($3)jal __subsf3move $4,$2sw $2,0($17)move $4,$2$L67:lbu $2,0($19)addiu $3,$fp,%lo(scale_factors)sll $2,$2,2addu $2,$2,$3lw $5,0($2)jal __mulsf3addiu $21,$21,1sw $2,0($17)addiu $20,$20,1addiu $17,$17,4bne $23,$21,$L54addiu $19,$19,1$L52:lw $31,52($sp)lw $fp,48($sp)lw $23,44($sp)lw $22,40($sp)lw $21,36($sp)lw $20,32($sp)lw $19,28($sp)lw $18,24($sp)lw $17,20($sp)lw $16,16($sp)move $2,$0j $31addiu $sp,$sp,56$L57:lw $4,32($22)slt $2,$4,3beq $2,$0,$L77sll $2,$4,2addu $2,$2,$22lw $3,0($2)addiu $4,$4,1sw $4,32($22)move $4,$3j $L67sw $3,0($17)$L58:lw $4,36($22)slt $2,$4,3beq $2,$0,$L78sll $2,$4,2addu $2,$2,$22lw $3,12($2)addiu $4,$4,1sw $4,36($22)move $4,$3j $L67sw $3,0($17)$L59:lw $6,8($18)lw $3,0($18)sra $4,$6,3addu $4,$4,$3lbu $2,0($4)lbu $5,1($4)lbu $7,3($4)lbu $3,2($4)sll $2,$2,24sll $5,$5,16or $2,$2,$5or $2,$2,$7sll $3,$3,8andi $4,$6,0x7or $3,$3,$2sll $3,$3,$4srl $3,$3,29lui $2,%hi(b3_mantissas)sll $3,$3,2addiu $2,$2,%lo(b3_mantissas)addu $3,$3,$2lw $4,0($3)addiu $6,$6,3sw $6,8($18)j $L67sw $4,0($17)$L60:lw $4,40($22)slt $2,$4,2bne $2,$0,$L79sll $2,$4,2lw $6,8($18)lw $3,0($18)sra $4,$6,3addu $4,$4,$3lbu $2,0($4)lbu $5,1($4)lbu $7,3($4)lbu $3,2($4)sll $2,$2,24sll $5,$5,16or $2,$2,$5or $2,$2,$7sll $3,$3,8andi $4,$6,0x7or $3,$3,$2sll $3,$3,$4srl $3,$3,25lui $2,%hi(b4_mantissas)addiu $2,$2,%lo(b4_mantissas)sll $3,$3,3addu $3,$3,$2lw $4,0($3)addiu $6,$6,7sw $4,24($22)lw $2,4($3)sw $6,8($18)sw $2,28($22)sw $0,40($22)move $4,$0sll $2,$4,2$L79:addu $2,$2,$22lw $3,24($2)addiu $4,$4,1sw $4,40($22)move $4,$3j $L67sw $3,0($17)$L61:lw $6,8($18)lw $3,0($18)sra $4,$6,3addu $4,$4,$3lbu $2,0($4)lbu $5,1($4)lbu $7,3($4)lbu $3,2($4)sll $2,$2,24sll $5,$5,16or $2,$2,$5or $2,$2,$7sll $3,$3,8andi $4,$6,0x7or $3,$3,$2sll $3,$3,$4srl $3,$3,28lui $2,%hi(b5_mantissas)sll $3,$3,2addiu $2,$2,%lo(b5_mantissas)addu $3,$3,$2lw $4,0($3)addiu $6,$6,4sw $6,8($18)j $L67sw $4,0($17)$L55:lw $7,8($18)lw $2,0($18)sra $3,$7,3addu $3,$3,$2lbu $4,0($3)lbu $6,1($3)lui $2,%hi(qntztab)lbu $8,3($3)lbu $5,2($3)sll $6,$6,16sll $4,$4,24addiu $2,$2,%lo(qntztab)addu $2,$9,$2or $4,$4,$6or $4,$4,$8lbu $16,0($2)sll $5,$5,8andi $2,$7,0x7or $5,$5,$4addu $7,$16,$7sll $5,$5,$2subu $4,$0,$16sra $4,$5,$4jal __floatsisfsw $7,8($18)sll $16,$16,2addiu $3,$fp,%lo(scale_factors)addu $16,$16,$3lw $5,-4($16)jal __mulsf3move $4,$2move $4,$2j $L67sw $2,0($17)$L78:lw $6,8($18)lw $3,0($18)sra $4,$6,3addu $4,$4,$3lbu $2,0($4)lbu $5,1($4)lbu $7,3($4)lbu $3,2($4)sll $2,$2,24sll $5,$5,16or $2,$2,$5or $2,$2,$7sll $3,$3,8andi $4,$6,0x7or $3,$3,$2sll $3,$3,$4srl $3,$3,25sll $4,$3,4lui $2,%hi(b2_mantissas)sll $3,$3,2subu $4,$4,$3addiu $2,$2,%lo(b2_mantissas)addu $4,$4,$2lw $3,0($4)addiu $6,$6,7sw $3,12($22)lw $2,4($4)sw $6,8($18)sw $2,16($22)lw $3,8($4)move $4,$0sll $2,$4,2sw $3,20($22)addu $2,$2,$22lw $3,12($2)addiu $4,$4,1sw $0,36($22)sw $4,36($22)move $4,$3j $L67sw $3,0($17)$L77:lw $6,8($18)lw $3,0($18)sra $4,$6,3addu $4,$4,$3lbu $2,0($4)lbu $5,1($4)lbu $7,3($4)lbu $3,2($4)sll $2,$2,24sll $5,$5,16or $2,$2,$5or $2,$2,$7sll $3,$3,8andi $4,$6,0x7or $3,$3,$2sll $3,$3,$4srl $3,$3,27sll $4,$3,4lui $2,%hi(b1_mantissas)sll $3,$3,2subu $4,$4,$3addiu $2,$2,%lo(b1_mantissas)addu $4,$4,$2lw $3,0($4)addiu $6,$6,5sw $3,0($22)lw $2,4($4)sw $6,8($18)sw $2,4($22)lw $3,8($4)move $4,$0sll $2,$4,2sw $3,8($22)addu $2,$2,$22lw $3,0($2)addiu $4,$4,1sw $0,32($22)sw $4,32($22)move $4,$3j $L67sw $3,0($17)$L76:jal av_random_generate_untempered_numbersmove $4,$16j $L63lw $6,2496($16)$L66:andi $2,$3,0x1srl $4,$4,1jal __floatsisfor $4,$2,$4move $4,$2jal __addsf3move $5,$2j $L65move $4,$2.set macro.set reorder.end get_transform_coeffs_ch.section .rodata.str1.4,"aMS",@progbits,1.align 2$LC28:.ascii "cplendf = %d < cplbegf = %d\012\000".align 2$LC32:.ascii "chbwcod = %d > 60\000".align 2$LC33:.ascii "delta bit allocation strategy reserved\012\000".align 2$LC34:.ascii "error in decoupling channels\012\000".align 2$LC36:.ascii "Error in routine get_transform_coeffs\012\000".globl __divsf3.globl __extendsfdf2.section .rodata.cst4.align 2$LC27:.word 1065353216.align 2$LC29:.word 1031798784.align 2$LC30:.word 1098907648.align 2$LC31:.word 1023410176.align 2$LC35:.word 1090519040.section .rodata.cst8.align 3$LC37:.word 1719614413.word 1072079006.section .text.ac3_parse_audio_block,"ax",@progbits.align 2.align 5.ent ac3_parse_audio_block.type ac3_parse_audio_block, @functionac3_parse_audio_block:.frame $sp,2808,$31 # vars= 2720, regs= 10/0, args= 48, gp= 0.mask 0xc0ff0000,-4.fmask 0x00000000,0.set noreorder.set nomacroaddiu $sp,$sp,-2808sw $4,2808($sp)sw $18,2776($sp)sw $31,2804($sp)sw $fp,2800($sp)sw $23,2796($sp)sw $22,2792($sp)sw $21,2788($sp)sw $20,2784($sp)sw $19,2780($sp)sw $17,2772($sp)sw $16,2768($sp)lw $3,2808($sp)lw $2,524($4)sw $5,2812($sp)lw $7,0($3)sw $2,2696($sp)
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -