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Don't forget to prefetch next vertex

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UnknownShadow200 2025-06-14 07:26:18 +10:00
parent f2a9d4cd60
commit 222b6a72aa
1 changed files with 13 additions and 14 deletions
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27
misc/dreamcast/VertexFast.S
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@ -85,17 +85,16 @@ _SubmitQuads:
pref @SRC ! LS, prefetch 32..63 (last 16 bytes of v2, first 16 bytes v3)
! TRANSFORM VERTEX 1
ftrv xmtrx, F1_XYZW ! FE, TRANSFORM(v1.XYZW)
! MISC OPERATIONS
! LOAD VERTEX 1 ATTRIBUTES + MISC OPERATIONS
add #-20, SRC ! EX, src -= 20 (offset now 12)
fldi0 F4_W ! LS, v4.W = 0.0
! LOAD VERTEX 1 ATTRIBUTES
mov.l @SRC+, V1_C ! LS, v1.C = src->color
fldi0 F4_W ! LS, v4.W = 0.0
mov.l @SRC+, V1_U ! LS, v1.U = src->u
mov.l @SRC+, V1_V ! LS, v1.V = src->v
! PROCESS VERTEX 1
fcmp/gt F4_W, F1_Z ! FE, T = v1.Z > 0
movt FLG ! EX, CLIPFLAGS = T (00 00 00 V1)
fmul F1_W, F1_W ! FE, v1.W = v1.W * v1.W
movt FLG ! EX, CLIPFLAGS = T (00 00 00 V1)
! LOAD VERTEX 2 XYZW
@ -108,11 +107,10 @@ _SubmitQuads:
pref @SRC ! LS, prefetch 64..96 (last 8 bytes of v3, first 24 bytes v4)
! TRANSFORM VERTEX 2
ftrv xmtrx, F2_XYZW ! FE, TRANSFORM(v2.XYZW)
! MISC OPERATIONS
! LOAD VERTEX 2 ATTRIBUTES + MISC OPERATIONS
add #-28, SRC ! EX, src -= 28 (offset now 36)
shll FLG ! EX, CLIPFLAGS <<= 1 (00 00 V1 00)
! LOAD VERTEX 2 ATTRIBUTES
mov.l @SRC+, V2_C ! LS, v2.C = src->color
shll FLG ! EX, CLIPFLAGS <<= 1 (00 00 V1 00)
mov.l @SRC+, V2_U ! LS, v2.U = src->u
mov.l @SRC+, V2_V ! LS, v2.V = src->v
! PROCESS VERTEX 2
@ -131,11 +129,10 @@ _SubmitQuads:
flds F1_Z, fpul ! LS, ftmp = v1.Z
! TRANSFORM VERTEX 3
ftrv xmtrx, F3_XYZW ! FE, TRANSFORM(v3.XYZW)
! MISC OPERATIONS
! LOAD VERTEX 3 ATTRIBUTES + MISC OPERATIONS
or TMP,FLG ! EX, CLIPFLAGS |= tmp (00 00 V1 V2)
shll FLG ! EX, CLIPFLAGS <<= 1 (00 V1 V2 00)
! LOAD VERTEX 3 ATTRIBUTES
mov.l @SRC+, V3_C ! LS, v3.C = src->color
shll FLG ! EX, CLIPFLAGS <<= 1 (00 V1 V2 00)
mov.l @SRC+, V3_U ! LS, v3.U = src->u
mov.l @SRC+, V3_V ! LS, v3.V = src->v
! PROCESS VERTEX 3
@ -151,14 +148,16 @@ _SubmitQuads:
fmov @SRC+, F4_Z ! LS, v4.Z = src->z
fldi1 F4_W ! LS, v4.W = 1.0
! MISC OPERATIONS
fldi0 F1_Z ! LS, v1.Z = 0.0
add #12, SRC ! EX, src += 12 (offset now 96)
pref @SRC ! LS, prefetch next 0..31 (all 24 bytes v1, first 8 bytes v2)
! TRANSFORM VERTEX 4
ftrv xmtrx, F4_XYZW ! FE, TRANSFORM(v4.XYZW)
! MISC OPERATIONS
! LOAD VERTEX 4 ATTRIBUTES + MISC OPERATIONS
add #-12, SRC ! EX, src -= 12 (offset now 84)
fldi0 F1_Z ! LS, v1.Z = 0.0
or TMP,FLG ! EX, CLIPFLAGS |= tmp (00 V1 V2 V3)
shll FLG ! EX, CLIPFLAGS <<= 1 (V1 V2 V3 00)
! LOAD VERTEX 4 ATTRIBUTES
mov.l @SRC+, V4_C ! LS, v4.C = src->color
shll FLG ! EX, CLIPFLAGS <<= 1 (V1 V2 V3 00)
mov.l @SRC+, V4_U ! LS, v4.U = src->u
mov.l @SRC+, V4_V ! LS, v4.V = src->v
! PROCESS VERTEX 4