From 34098dba6763afd3636a14f9c2a079ab08f23b2d Mon Sep 17 00:00:00 2001 From: Siarhei Siamashka Date: Wed, 9 Mar 2011 11:34:15 +0200 Subject: ARM: NEON: common macro template for bilinear scanline scalers This allows to generate bilinear scanline scaling functions targeting various source and destination color formats. Right now a8r8g8b8/x8r8g8b8 and r5g6b5 color formats are supported. More formats can be added if needed. --- pixman/pixman-arm-neon-asm.S | 222 +++++++++++++++++++++++++++++++++++++++++++ pixman/pixman-arm-neon-asm.h | 17 ++++ 2 files changed, 239 insertions(+) diff --git a/pixman/pixman-arm-neon-asm.S b/pixman/pixman-arm-neon-asm.S index c168e10c..f3784f56 100644 --- a/pixman/pixman-arm-neon-asm.S +++ b/pixman/pixman-arm-neon-asm.S @@ -2588,3 +2588,225 @@ pixman_asm_function pixman_scaled_bilinear_scanline_8888_8888_SRC_asm_neon .unreq TMP1 .unreq TMP2 .endfunc + +.purgem bilinear_interpolate_last_pixel +.purgem bilinear_interpolate_two_pixels +.purgem bilinear_interpolate_four_pixels + +/* + * Bilinear scaling support code which tries to provide pixel fetching, color + * format conversion, and interpolation as separate macros which can be used + * as the basic building blocks for constructing bilinear scanline functions. + */ + +.macro bilinear_load_8888 reg1, reg2, tmp + mov TMP2, X, asr #16 + add X, X, UX + add TMP1, TOP, TMP2, asl #2 + add TMP2, BOTTOM, TMP2, asl #2 + vld1.32 {reg1}, [TMP1] + vld1.32 {reg2}, [TMP2] +.endm + +.macro bilinear_load_0565 reg1, reg2, tmp + mov TMP2, X, asr #16 + add X, X, UX + add TMP1, TOP, TMP2, asl #1 + add TMP2, BOTTOM, TMP2, asl #1 + vld1.32 {reg2[0]}, [TMP1] + vld1.32 {reg2[1]}, [TMP2] + convert_four_0565_to_x888_packed reg2, reg1, reg2, tmp +.endm + +.macro bilinear_store_8888 numpix, tmp1, tmp2 +.if numpix == 4 + vst1.32 {d0, d1}, [OUT]! +.elseif numpix == 2 + vst1.32 {d0}, [OUT]! +.elseif numpix == 1 + vst1.32 {d0[0]}, [OUT, :32]! +.else + .error bilinear_store_8888 numpix is unsupported +.endif +.endm + +.macro bilinear_store_0565 numpix, tmp1, tmp2 + vuzp.u8 d0, d1 + vuzp.u8 d2, d3 + vuzp.u8 d1, d3 + vuzp.u8 d0, d2 + convert_8888_to_0565 d2, d1, d0, q1, tmp1, tmp2 +.if numpix == 4 + vst1.16 {d2}, [OUT]! +.elseif numpix == 2 + vst1.32 {d2[0]}, [OUT]! +.elseif numpix == 1 + vst1.16 {d2[0]}, [OUT]! +.else + .error bilinear_store_0565 numpix is unsupported +.endif +.endm + +.macro bilinear_interpolate_last_pixel src_fmt, dst_fmt + bilinear_load_&src_fmt d0, d1, d2 + vmull.u8 q1, d0, d28 + vmlal.u8 q1, d1, d29 + vshr.u16 d30, d24, #8 + /* 4 cycles bubble */ + vshll.u16 q0, d2, #8 + vmlsl.u16 q0, d2, d30 + vmlal.u16 q0, d3, d30 + /* 5 cycles bubble */ + vshrn.u32 d0, q0, #16 + /* 3 cycles bubble */ + vmovn.u16 d0, q0 + /* 1 cycle bubble */ + bilinear_store_&dst_fmt 1, q2, q3 +.endm + +.macro bilinear_interpolate_two_pixels src_fmt, dst_fmt + bilinear_load_&src_fmt d0, d1, d2 + vmull.u8 q1, d0, d28 + vmlal.u8 q1, d1, d29 + bilinear_load_&src_fmt d20, d21, d22 + vmull.u8 q11, d20, d28 + vmlal.u8 q11, d21, d29 + vshr.u16 q15, q12, #8 + vadd.u16 q12, q12, q13 + vshll.u16 q0, d2, #8 + vmlsl.u16 q0, d2, d30 + vmlal.u16 q0, d3, d30 + vshll.u16 q10, d22, #8 + vmlsl.u16 q10, d22, d31 + vmlal.u16 q10, d23, d31 + vshrn.u32 d30, q0, #16 + vshrn.u32 d31, q10, #16 + vmovn.u16 d0, q15 + bilinear_store_&dst_fmt 2, q2, q3 +.endm + +.macro bilinear_interpolate_four_pixels src_fmt, dst_fmt + bilinear_load_&src_fmt d0, d1, d2 + vmull.u8 q1, d0, d28 + vmlal.u8 q1, d1, d29 + bilinear_load_&src_fmt d20, d21, d22 + vmull.u8 q11, d20, d28 + vmlal.u8 q11, d21, d29 + bilinear_load_&src_fmt d4, d5, d6 + vmull.u8 q3, d4, d28 + vmlal.u8 q3, d5, d29 + bilinear_load_&src_fmt d16, d17, d18 + vmull.u8 q9, d16, d28 + vmlal.u8 q9, d17, d29 + pld [TMP1, PF_OFFS] + vshr.u16 q15, q12, #8 + vadd.u16 q12, q12, q13 + vshll.u16 q0, d2, #8 + vmlsl.u16 q0, d2, d30 + vmlal.u16 q0, d3, d30 + vshll.u16 q10, d22, #8 + vmlsl.u16 q10, d22, d31 + vmlal.u16 q10, d23, d31 + vshr.u16 q15, q12, #8 + vshll.u16 q2, d6, #8 + vmlsl.u16 q2, d6, d30 + vmlal.u16 q2, d7, d30 + vshll.u16 q8, d18, #8 + pld [TMP2, PF_OFFS] + vmlsl.u16 q8, d18, d31 + vmlal.u16 q8, d19, d31 + vadd.u16 q12, q12, q13 + vshrn.u32 d0, q0, #16 + vshrn.u32 d1, q10, #16 + vshrn.u32 d4, q2, #16 + vshrn.u32 d5, q8, #16 + vmovn.u16 d0, q0 + vmovn.u16 d1, q2 + bilinear_store_&dst_fmt 4, q2, q3 +.endm + +/* + * Main template macro for generating NEON optimized bilinear scanline + * functions. + * + * TODO: use software pipelining and aligned writes to the destination buffer + * in order to improve performance + * + * Bilinear scanline scaler macro template uses the following arguments: + * fname - name of the function to generate + * src_fmt - source color format (8888 or 0565) + * dst_fmt - destination color format (8888 or 0565) + * bpp_shift - (1 << bpp_shift) is the size of source pixel in bytes + * prefetch_distance - prefetch in the source image by that many + * pixels ahead + */ + +.macro generate_bilinear_scanline_func fname, src_fmt, dst_fmt, \ + bpp_shift, prefetch_distance + +pixman_asm_function fname + OUT .req r0 + TOP .req r1 + BOTTOM .req r2 + WT .req r3 + WB .req r4 + X .req r5 + UX .req r6 + WIDTH .req ip + TMP1 .req r3 + TMP2 .req r4 + PF_OFFS .req r7 + TMP3 .req r8 + TMP4 .req r9 + + mov ip, sp + push {r4, r5, r6, r7, r8, r9} + mov PF_OFFS, #prefetch_distance + ldmia ip, {WB, X, UX, WIDTH} + mul PF_OFFS, PF_OFFS, UX + + cmp WIDTH, #0 + ble 3f + + vdup.u16 q12, X + vdup.u16 q13, UX + vdup.u8 d28, WT + vdup.u8 d29, WB + vadd.u16 d25, d25, d26 + vadd.u16 q13, q13, q13 + + subs WIDTH, WIDTH, #4 + blt 1f + mov PF_OFFS, PF_OFFS, asr #(16 - bpp_shift) +0: + bilinear_interpolate_four_pixels src_fmt, dst_fmt + subs WIDTH, WIDTH, #4 + bge 0b +1: + tst WIDTH, #2 + beq 2f + bilinear_interpolate_two_pixels src_fmt, dst_fmt +2: + tst WIDTH, #1 + beq 3f + bilinear_interpolate_last_pixel src_fmt, dst_fmt +3: + pop {r4, r5, r6, r7, r8, r9} + bx lr + + .unreq OUT + .unreq TOP + .unreq BOTTOM + .unreq WT + .unreq WB + .unreq X + .unreq UX + .unreq WIDTH + .unreq TMP1 + .unreq TMP2 + .unreq PF_OFFS + .unreq TMP3 + .unreq TMP4 +.endfunc + +.endm diff --git a/pixman/pixman-arm-neon-asm.h b/pixman/pixman-arm-neon-asm.h index 24fa3616..97adc6a8 100644 --- a/pixman/pixman-arm-neon-asm.h +++ b/pixman/pixman-arm-neon-asm.h @@ -1158,3 +1158,20 @@ fname: vsri.u16 out, tmp1, #5 vsri.u16 out, tmp2, #11 .endm + +/* + * Conversion of four r5g6b5 pixels (in) to four x8r8g8b8 pixels + * returned in (out0, out1) registers pair. Requires one temporary + * 64-bit register (tmp). 'out1' and 'in' may overlap, the original + * value from 'in' is lost + */ +.macro convert_four_0565_to_x888_packed in, out0, out1, tmp + vshl.u16 out0, in, #5 /* G top 6 bits */ + vshl.u16 tmp, in, #11 /* B top 5 bits */ + vsri.u16 in, in, #5 /* R is ready in top bits */ + vsri.u16 out0, out0, #6 /* G is ready in top bits */ + vsri.u16 tmp, tmp, #5 /* B is ready in top bits */ + vshr.u16 out1, in, #8 /* R is in place */ + vsri.u16 out0, tmp, #8 /* G & B is in place */ + vzip.u16 out0, out1 /* everything is in place */ +.endm -- cgit v1.2.3