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change prob_index update to save two instructions -> 184b

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Dennis Ranke
2022-09-18 16:27:21 +02:00
parent 5bc3f88564
commit 2f820316e3
1 changed files with 5 additions and 4 deletions
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9
asm_unpackers/unpack_armv6m.S
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@@ -1,3 +1,6 @@
// armv6-m upkr unpacker by yrlf
// some optimizations by exoticorn
.syntax unified .syntax unified
.thumb .thumb
@@ -45,14 +48,12 @@ upkr_unpack:
beq 2f beq 2f
1: 1:
adds r5, r5, #1
bl upkr_decode_length bl upkr_decode_length
subs r5, r5, #1
subs r3, r6, r4 subs r3, r6, r4
beq .Lend beq .Lend
2: 2:
adds r5, r5, #65 adds r5, r5, #64
bl upkr_decode_length bl upkr_decode_length
.Lcopy_loop: .Lcopy_loop:
ldrb r5, [r0, r3] ldrb r5, [r0, r3]
@@ -95,12 +96,12 @@ upkr_decode_length:
movs r3, #0 movs r3, #0
movs r0, #0 movs r0, #0
.Lbit_loop: .Lbit_loop:
adds r5, r5, #1
bl upkr_decode_bit bl upkr_decode_bit
beq 1f beq 1f
adds r5, r5, #1 adds r5, r5, #1
bl upkr_decode_bit bl upkr_decode_bit
adds r5, r5, #1
lsls r6, r6, r3 lsls r6, r6, r3
adds r3, r3, #1 adds r3, r3, #1
orrs r0, r0, r6 orrs r0, r0, r6