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added equzero (same as cmpzero but only outputs Zero flag) #755

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added equzero (same as cmpzero but only outputs Zero flag) #755

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4 changes: 2 additions & 2 deletions src/crt/dtof.src
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Original file line number Diff line number Diff line change
Expand Up @@ -173,7 +173,7 @@ __dtof:
; BC:UDE:UHL = 1 << shift
; (SP) = X
call __lland
call __llcmpzero
call __llequzero
pop hl
; DE and BC are swapped here
pop bc
Expand Down Expand Up @@ -215,6 +215,6 @@ __dtof:
jr .L.ret_copysign

.extern __lland
.extern __llcmpzero
.extern __llequzero
.extern __llshru
.extern __lshru
8 changes: 8 additions & 0 deletions src/crt/i48cmpzero.src
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Expand Up @@ -6,10 +6,18 @@
.assume adl=1

.section .text

.global __i48equzero
.type __i48equzero, @function

.global __i48cmpzero
.type __i48cmpzero, @function

__i48equzero:
; Zero flag = (UDE:UHL == 0)
__i48cmpzero:
; Zero flag = (UDE:UHL == 0)
; Sign flag = (UDE:UHL < 0)
; CC: 13 bytes
; Minimum: 8F + 3R + 2
; Maximum: 14F + 3R + 3
Expand Down
8 changes: 8 additions & 0 deletions src/crt/lcmpzero.src
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Original file line number Diff line number Diff line change
@@ -1,10 +1,18 @@
.assume adl=1

.section .text

.global __lequzero
.type __lequzero, @function

.global __lcmpzero
.type __lcmpzero, @function

__lequzero:
; Zero flag = (E:UHL == 0)
__lcmpzero:
; Zero flag = (E:UHL == 0)
; Sign flag = (E:UHL < 0)
inc e
dec e
ret nz
Expand Down
8 changes: 8 additions & 0 deletions src/crt/llcmpzero.src
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Original file line number Diff line number Diff line change
@@ -1,10 +1,18 @@
.assume adl=1

.section .text

.global __llequzero
.type __llequzero, @function

.global __llcmpzero
.type __llcmpzero, @function

__llequzero:
; Zero flag = (BC:UDE:UHL == 0)
__llcmpzero:
; Zero flag = (BC:UDE:UHL == 0)
; Sign flag = (BC:UDE:UHL < 0)
inc b
dec b
ret nz
Expand Down
4 changes: 2 additions & 2 deletions src/libc/strtoll.src
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Expand Up @@ -26,7 +26,7 @@ _strtoll.maybe_out_of_range:
; negative
; check that the result is not an exact INT_MIN
ld b, a ; B = (B << 1)
call __llcmpzero
call __llequzero
set 7, b
ret z ; exact INT_MIN
_strtoll.underflow:
Expand Down Expand Up @@ -344,4 +344,4 @@ __strtoll_common.set_overflow_bit:

.extern _errno
.extern __llneg
.extern __llcmpzero
.extern __llequzero
6 changes: 3 additions & 3 deletions src/softfloat/s_shiftRightJam64.src
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Expand Up @@ -41,7 +41,7 @@ _softfloat_shiftRightJam64:
ld hl, (iy + 4)
call __llshl
xor a, a
call __llcmpzero
call __llequzero
jr z, .L.no_round
inc a ; ld a, 1
.L.no_round:
Expand All @@ -58,7 +58,7 @@ _softfloat_shiftRightJam64:
.L.overflow_shift:
; A is zero here
ld hl, (iy + 4)
call __llcmpzero
call __llequzero
ret z
xor a, a
sbc hl, hl
Expand All @@ -69,6 +69,6 @@ _softfloat_shiftRightJam64:
inc hl
ret

.extern __llcmpzero
.extern __llequzero
.extern __llshl
.extern __llshru
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