src/mesa/sparc/clip.S

   1 /*
   2  * Clip testing in SPARC assembly
   3  */
   4
   5 #if __arch64__
   6 #define LDPTR           ldx
   7 #define V4F_DATA        0x00
   8 #define V4F_START       0x08
   9 #define V4F_COUNT       0x10
  10 #define V4F_STRIDE      0x14
  11 #define V4F_SIZE        0x18
  12 #define V4F_FLAGS       0x1c
  13 #else
  14 #define LDPTR           ld
  15 #define V4F_DATA        0x00
  16 #define V4F_START       0x04
  17 #define V4F_COUNT       0x08
  18 #define V4F_STRIDE      0x0c
  19 #define V4F_SIZE        0x10
  20 #define V4F_FLAGS       0x14
  21 #endif
  22
  23 #define VEC_SIZE_1      1
  24 #define VEC_SIZE_2      3
  25 #define VEC_SIZE_3      7
  26 #define VEC_SIZE_4      15
  27
  28         .register %g2, #scratch
  29         .register %g3, #scratch
  30
  31         .text
  32         .align          64
  33
  34 one_dot_zero:
  35         .word           0x3f800000      /* 1.0f */
  36
  37         /* This trick is shamelessly stolen from the x86
  38          * Mesa asm.  Very clever, and we can do it too
  39          * since we have the necessary add with carry
  40          * instructions on Sparc.
  41          */
  42 clip_table:
  43         .byte    0,  1,  0,  2,  4,  5,  4,  6
  44         .byte    0,  1,  0,  2,  8,  9,  8, 10
  45         .byte   32, 33, 32, 34, 36, 37, 36, 38
  46         .byte   32, 33, 32, 34, 40, 41, 40, 42
  47         .byte    0,  1,  0,  2,  4,  5,  4,  6
  48         .byte    0,  1,  0,  2,  8,  9,  8, 10
  49         .byte   16, 17, 16, 18, 20, 21, 20, 22
  50         .byte   16, 17, 16, 18, 24, 25, 24, 26
  51         .byte   63, 61, 63, 62, 55, 53, 55, 54
  52         .byte   63, 61, 63, 62, 59, 57, 59, 58
  53         .byte   47, 45, 47, 46, 39, 37, 39, 38
  54         .byte   47, 45, 47, 46, 43, 41, 43, 42
  55         .byte   63, 61, 63, 62, 55, 53, 55, 54
  56         .byte   63, 61, 63, 62, 59, 57, 59, 58
  57         .byte   31, 29, 31, 30, 23, 21, 23, 22
  58         .byte   31, 29, 31, 30, 27, 25, 27, 26
  59
  60 /* GLvector4f *clip_vec, GLvector4f *proj_vec,
  61    GLubyte clipMask[], GLubyte *orMask, GLubyte *andMask,
  62    GLboolean viewport_z_enable */
  63
  64         .align          64
  65 __pc_tramp:
  66         retl
  67          nop
  68
  69         .globl          _mesa_sparc_cliptest_points4
  70 _mesa_sparc_cliptest_points4:
  71         save            %sp, -64, %sp
  72         call            __pc_tramp
  73          sub            %o7, (. - one_dot_zero - 4), %g1
  74         ld              [%g1 + 0x0], %f4
  75         add             %g1, 0x4, %g1
  76
  77         ld              [%i0 + V4F_STRIDE], %l1
  78         ld              [%i0 + V4F_COUNT], %l3
  79         LDPTR           [%i0 + V4F_START], %i0
  80         LDPTR           [%i1 + V4F_START], %i5
  81         ldub            [%i3], %g2
  82         ldub            [%i4], %g3
  83         sll             %g3, 8, %g3
  84         or              %g2, %g3, %g2
  85
  86         ld              [%i1 + V4F_FLAGS], %g3
  87         or              %g3, VEC_SIZE_4, %g3
  88         st              %g3, [%i1 + V4F_FLAGS]
  89         mov             3, %g3
  90         st              %g3, [%i1 + V4F_SIZE]
  91         st              %l3, [%i1 + V4F_COUNT]
  92         clr             %l2
  93         clr             %l0
  94
  95         /* l0:  i
  96          * l3:  count
  97          * l1:  stride
  98          * l2:  c
  99          * g2:  (tmpAndMask << 8) | tmpOrMask
 100          * g1:  clip_table
 101          * i0:  from[stride][i]
 102          * i2:  clipMask
 103          * i5:  vProj[4][i]
 104          */
 105
 106 1:      ld              [%i0 + 0x0c], %f3       ! LSU   Group
 107         ld              [%i0 + 0x0c], %g5       ! LSU   Group
 108         ld              [%i0 + 0x08], %g4       ! LSU   Group
 109         fdivs           %f4, %f3, %f8           ! FGM
 110         addcc           %g5, %g5, %g5           ! IEU1  Group
 111         addx            %g0, 0x0, %g3           ! IEU1  Group
 112         addcc           %g4, %g4, %g4           ! IEU1  Group
 113         addx            %g3, %g3, %g3           ! IEU1  Group
 114         subcc           %g5, %g4, %g0           ! IEU1  Group
 115         ld              [%i0 + 0x04], %g4       ! LSU   Group
 116         addx            %g3, %g3, %g3           ! IEU1  Group
 117         addcc           %g4, %g4, %g4           ! IEU1  Group
 118         addx            %g3, %g3, %g3           ! IEU1  Group
 119         subcc           %g5, %g4, %g0           ! IEU1  Group
 120         ld              [%i0 + 0x00], %g4       ! LSU   Group
 121         addx            %g3, %g3, %g3           ! IEU1  Group
 122         addcc           %g4, %g4, %g4           ! IEU1  Group
 123         addx            %g3, %g3, %g3           ! IEU1  Group
 124         subcc           %g5, %g4, %g0           ! IEU1  Group
 125         addx            %g3, %g3, %g3           ! IEU1  Group
 126         ldub            [%g1 + %g3], %g3        ! LSU   Group
 127         cmp             %g3, 0                  ! IEU1  Group, stall
 128         be              2f                      ! CTI
 129          stb            %g3, [%i2]              ! LSU
 130         sll             %g3, 8, %g4             ! IEU1  Group
 131         add             %l2, 1, %l2             ! IEU0
 132         st              %g0, [%i5 + 0x00]       ! LSU
 133         or              %g4, 0xff, %g4          ! IEU0  Group
 134         or              %g2, %g3, %g2           ! IEU1
 135         st              %g0, [%i5 + 0x04]       ! LSU
 136         and             %g2, %g4, %g2           ! IEU0  Group
 137         st              %g0, [%i5 + 0x08]       ! LSU
 138         b               3f                      ! CTI
 139          st             %f4, [%i5 + 0x0c]       ! LSU   Group
 140 2:      ld              [%i0 + 0x00], %f0       ! LSU   Group
 141         ld              [%i0 + 0x04], %f1       ! LSU   Group
 142         ld              [%i0 + 0x08], %f2       ! LSU   Group
 143         fmuls           %f0, %f8, %f0           ! FGM
 144         st              %f0, [%i5 + 0x00]       ! LSU   Group
 145         fmuls           %f1, %f8, %f1           ! FGM
 146         st              %f1, [%i5 + 0x04]       ! LSU   Group
 147         fmuls           %f2, %f8, %f2           ! FGM
 148         st              %f2, [%i5 + 0x08]       ! LSU   Group
 149         st              %f8, [%i5 + 0x0c]       ! LSU   Group
 150 3:      add             %i5, 0x10, %i5          ! IEU1
 151         add             %l0, 1, %l0             ! IEU0  Group
 152         add             %i2, 1, %i2             ! IEU0  Group
 153         cmp             %l0, %l3                ! IEU1  Group
 154         bne             1b                      ! CTI
 155          add            %i0, %l1, %i0           ! IEU0  Group
 156         stb             %g2, [%i3]              ! LSU
 157         srl             %g2, 8, %g3             ! IEU0  Group
 158         cmp             %l2, %l3                ! IEU1  Group
 159         bl,a            1f                      ! CTI
 160          clr            %g3                     ! IEU0
 161 1:      stb             %g3, [%i4]              ! LSU   Group
 162         ret                                     ! CTI   Group
 163          restore        %i1, 0x0, %o0
 164
 165         .globl          _mesa_sparc_cliptest_points4_np
 166 _mesa_sparc_cliptest_points4_np:
 167         save            %sp, -64, %sp
 168
 169         call            __pc_tramp
 170          sub            %o7, (. - one_dot_zero - 4), %g1
 171         add             %g1, 0x4, %g1
 172
 173         ld              [%i0 + V4F_STRIDE], %l1
 174         ld              [%i0 + V4F_COUNT], %l3
 175         LDPTR           [%i0 + V4F_START], %i0
 176         ldub            [%i3], %g2
 177         ldub            [%i4], %g3
 178         sll             %g3, 8, %g3
 179         or              %g2, %g3, %g2
 180
 181         clr             %l2
 182         clr             %l0
 183
 184         /* l0:  i
 185          * l3:  count
 186          * l1:  stride
 187          * l2:  c
 188          * g2:  (tmpAndMask << 8) | tmpOrMask
 189          * g1:  clip_table
 190          * i0:  from[stride][i]
 191          * i2:  clipMask
 192          */
 193
 194 1:      ld              [%i0 + 0x0c], %g5       ! LSU   Group
 195         ld              [%i0 + 0x08], %g4       ! LSU   Group
 196         addcc           %g5, %g5, %g5           ! IEU1  Group
 197         addx            %g0, 0x0, %g3           ! IEU1  Group
 198         addcc           %g4, %g4, %g4           ! IEU1  Group
 199         addx            %g3, %g3, %g3           ! IEU1  Group
 200         subcc           %g5, %g4, %g0           ! IEU1  Group
 201         ld              [%i0 + 0x04], %g4       ! LSU   Group
 202         addx            %g3, %g3, %g3           ! IEU1  Group
 203         addcc           %g4, %g4, %g4           ! IEU1  Group
 204         addx            %g3, %g3, %g3           ! IEU1  Group
 205         subcc           %g5, %g4, %g0           ! IEU1  Group
 206         ld              [%i0 + 0x00], %g4       ! LSU   Group
 207         addx            %g3, %g3, %g3           ! IEU1  Group
 208         addcc           %g4, %g4, %g4           ! IEU1  Group
 209         addx            %g3, %g3, %g3           ! IEU1  Group
 210         subcc           %g5, %g4, %g0           ! IEU1  Group
 211         addx            %g3, %g3, %g3           ! IEU1  Group
 212         ldub            [%g1 + %g3], %g3        ! LSU   Group
 213         cmp             %g3, 0                  ! IEU1  Group, stall
 214         be              2f                      ! CTI
 215          stb            %g3, [%i2]              ! LSU
 216         sll             %g3, 8, %g4             ! IEU1  Group
 217         add             %l2, 1, %l2             ! IEU0
 218         or              %g4, 0xff, %g4          ! IEU0  Group
 219         or              %g2, %g3, %g2           ! IEU1
 220         and             %g2, %g4, %g2           ! IEU0  Group
 221 2:      add             %l0, 1, %l0             ! IEU0  Group
 222         add             %i2, 1, %i2             ! IEU0  Group
 223         cmp             %l0, %l3                ! IEU1  Group
 224         bne             1b                      ! CTI
 225          add            %i0, %l1, %i0           ! IEU0  Group
 226         stb             %g2, [%i3]              ! LSU
 227         srl             %g2, 8, %g3             ! IEU0  Group
 228         cmp             %l2, %l3                ! IEU1  Group
 229         bl,a            1f                      ! CTI
 230          clr            %g3                     ! IEU0
 231 1:      stb             %g3, [%i4]              ! LSU   Group
 232         ret                                     ! CTI   Group
 233          restore        %i1, 0x0, %o0