git.y1.nz

commit 3f8d09a6d9168b066516a6ee25c66cc7835b5e9b
parent 720a871d81e1fde952c10543677cb3f0cbca6246
Author: Toxa <untoxa@mail.ru>
Date:   Wed, 29 Sep 2021 00:44:41 +0300

minor macro optimization

Diffstat:
M
gbdk-lib/libc/targets/gbz80/gb/global.s
7
+++----
M
gbdk-lib/libc/targets/z80/gg/global.s
7
+++----
M
gbdk-lib/libc/targets/z80/sms/global.s
7
+++----

3 files changed, 9 insertions(+), 12 deletions(-)
diff --git a/gbdk-lib/libc/targets/gbz80/gb/global.s b/gbdk-lib/libc/targets/gbz80/gb/global.s
@@ -491,7 +491,7 @@ lbl:
         SIGNED_ADD_A_REG16      regH, regL
 .endm
 
-.macro MUL_DE_BY_A_RET_HL ?lbl1 ?lbl2 ?lbl3
+.macro MUL_DE_BY_A_RET_HL ?lbl1 ?lbl2
         ; Multiply DE by A, return result in HL; preserves: BC
         LD      HL, #0
 lbl1:
@@ -499,10 +499,9 @@ lbl1:
         JR      NC, lbl2
         ADD     HL, DE
 lbl2:
-        JR      Z, lbl3
         SLA     E
         RL      D
-        JR      lbl1
-lbl3:
+        OR      A
+        JR      NZ, lbl1
 .endm
 
diff --git a/gbdk-lib/libc/targets/z80/gg/global.s b/gbdk-lib/libc/targets/z80/gg/global.s
@@ -307,7 +307,7 @@ lbl:
         ld regH, a
 .endm
 
-.macro MUL_DE_BY_A_RET_HL ?lbl1 ?lbl2 ?lbl3
+.macro MUL_DE_BY_A_RET_HL ?lbl1 ?lbl2
         ; Multiply DE by A, return result in HL; preserves: BC
         ld hl, #0
 lbl1:
@@ -315,11 +315,10 @@ lbl1:
         jp nc, lbl2
         add hl, de
 lbl2:
-        jp z, lbl3
         sla e
         rl d
-        jp lbl1
-lbl3:
+        or a
+        jp nz, lbl1
 .endm
 
 .macro DIV_PART divident divisor ?lbl
diff --git a/gbdk-lib/libc/targets/z80/sms/global.s b/gbdk-lib/libc/targets/z80/sms/global.s
@@ -271,7 +271,7 @@ lbl:
         ld regH, a
 .endm
 
-.macro MUL_DE_BY_A_RET_HL ?lbl1 ?lbl2 ?lbl3
+.macro MUL_DE_BY_A_RET_HL ?lbl1 ?lbl2
         ; Multiply DE by A, return result in HL; preserves: BC
         ld hl, #0
 lbl1:
@@ -279,11 +279,10 @@ lbl1:
         jp nc, lbl2
         add hl, de
 lbl2:
-        jp z, lbl3
         sla e
         rl d
-        jp lbl1
-lbl3:
+        or a
+        jp nz, lbl1
 .endm
 
 .macro DIV_PART divident divisor ?lbl

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