69 lines
817 B
ArmAsm
69 lines
817 B
ArmAsm
.global _memory_read
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.global _memory_write
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.global _memory_dsp_xram_memset
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.global _memory_dsp_yram_memset
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.global _memory_dsp_xyram_memcpy
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_memory_read:
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dt r5
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bf/s _memory_read
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mov.b @r4+, r0
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rts
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nop
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_memory_write:
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add r5, r4
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1: dt r5
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bf/s 1b
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mov.b r0, @-r4
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rts
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nop
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_memory_dsp_xram_memset:
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ldrs 1f
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ldre 1f
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shlr2 r5
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ldrc r5
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mov #0, r6
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lds r6, x0
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1: movx.l x0, @r4+
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rts
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nop
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_memory_dsp_yram_memset:
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mov r4, r2
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ldrs 1f
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ldre 1f
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shlr2 r5
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ldrc r5
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mov #0, r6
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lds r6, y0
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1: movy.l y0, @r2+
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rts
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nop
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_memory_dsp_xyram_memcpy:
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ldrs 1f
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ldre 1f
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shlr2 r6
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add #-1, r6
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ldrc r6
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mov r4, r7
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/* First load from XRAM */
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movx.w @r5+, x0
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/* Write to YRAM then load from XRAM, in parallel */
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1: pcopy x0, a0 movx.w @r5+, x0 movy.w a0, @r7+
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/* Last write to YRAM */
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rts
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movy.w a0, @r7+
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